Tsunami Alert for New Zealand, the Philippines, Indonesia, Papua New Guinea, Hawaii, and others. Waves expected over the next few hours, caused by 8.9 earthquake in Japan.

Opis: Aktuelna dešavanja u zemlji i svetu. Bez političkih i verskih tema!

Epicentar potresa bio je 130 km istočno od Sendaja, na dubini od 24 km, naveo je Američki geološki institut.

Rihterova skala kategoriše zemljotrese na osnovu oslobođene energije u hipocentru – mestu nastanka zemljotresa u dubini Zemljine kore.

U nuklearnoj centrali Fukušima 1, na severoistoku Japana, čula se eksplozija koja je potresla reaktor Daiči, i iznad centrale vidi se beli oblak, javila je danas agencija Điđi. "U centrali je došlo do topljenja nuklearnog reaktora", javile su agencije Kjodo i Džidži.

TOKYO – Japan's government spokesman says the metal container sheltering a nuclear reactor was not affected by an explosion that destroyed the building it's in.

Yukio Edano says the radiation around the plant did not rise after the blast but instead is decreasing. He added that pressure in the reactor was also decreasing.

Pressure and heat have been building at the nuclear reactor since an earthquake and tsunami Friday caused its cooling system to fail.

An explosion Saturday blew out the walls of the building housing the reactor. The government has ordered people within a 12-mile (20-kilometer) radius of the plant in Fukushima to evacuate the area.

izvor

(CNN) -- An explosion at an earthquake-struck nuclear plant was not caused by damage to the nuclear reactor but by a pumping system that failed as crews tried to bring the reactor's temperature down, Chief Cabinet Secretary Yukio Edano said Saturday.

Workers at the Fukushima Daiichi plant have begun flooding the reactor containment structure with sea water to bring the reactor's temperature down to safe levels, he said. The effort is expected to take two days.

Radiation levels have fallen since the explosion and there is no immediate danger, Edano said. But authorities were nevertheless expanding the evacuation to include a radius of 20 kilometers (about 12.5 miles) around the plant. The evacuation previously reached out to 10 kilometers.

Horvat: mene zanima koliko zivota je "otplivalo" s ovim cunamijem, ne verujem da je samo par stotina/hiljadu mrtvih

Massive earthquake hits Japan

An 8.9-magnitude earthquake hit off the east coast of Japan early today. The quake -- one of the largest in recorded history -- triggered a 23-foot tsunami that battered Japan's coast, killing hundreds and sweeping away cars, homes, buildings, and boats. Editors note: we'll post more as the story develops -- Lloyd Young

IWAKI, Japan – An explosion at a nuclear power plant on Japan's devastated coast destroyed a building Saturday and added leaking radiation, or even outright meltdown, to the threats menacing a nation just beginning to grasp the scale of a catastrophic earthquake and tsunami.

The Japanese government said radiation emanating from the plant appeared to have decreased after the blast, which produced an intensifying cloud of white smoke that swallowed the complex. But authorities did not say why, and the precise cause of the explosion and the extent of the ongoing danger were not clear.

...

The explosion at the nuclear plant, Fukushima Dai-ichi, 170 miles northeast of Tokyo, appeared to be a consequence of steps taken to prevent a meltdown after the quake and tsunami knocked out power to the plant, crippling the system used to cool fuel rods there.

The blast destroyed the building housing the reactor, but not the reactor itself, which is enveloped by stainless steel 6 inches thick.

Inside that superheated steel vessel, water being poured over the fuel rods to cool them formed hydrogen. When officials released some of the hydrogen gas to relieve pressure inside the reactor, the hydrogen apparently reacted with oxygen, either in the air or the cooling water, and caused the explosion.

...
Officials have said that radiation levels at Fukushima were elevated before the blast: At one point, the plant was releasing each hour the amount of radiation a person normally absorbs from the environment each year.

izvor

jericho1405: Tacan broj mrtvih se nece znati neko vrijeme. Medjutim, na srecu(ako to mozemo tako nazvati), cunami se ocekivao, pa je bilo dovoljno vremena za evakuaciju stanovnistva ugrozenih prostora, za razliku od 2004. kada to nije bio slucaj.

Horvat: edit: cunami je otisao cak do obala perua, mehika, ekvadora, chilea, kalifornije, medjutim nema ozbiljnijih problema

jericho1405: Ovih dana(tacnije 19. marta) ce Mjesec biti najblizi Zemlji u posljednjih nekoliko desetina godina(slicna situacija je bila 2004.),

mmix: Ajd sad procitaj ponovo sta si napisao ;) (hint 2004-a je bila pre 7 godina 8))

Officials in Japan warn of new explosion at Fukushima

Officials in Japan have warned of a risk of another explosion at the Fukushima power plant, damaged in Friday’s earthquake.The government claims the plant can withstand the blast, just as the first reactor did on Saturday.
Japan’s chief government spokesman, Yukio Edano, said Sunday that the reactor at Unit 3 of the Fukushima Daiichi nuclear facility could go into meltdown and an explosion was possible. Reports state the reactor’s fuel rods have been exposed to the air for too long and have been damaged.

Further concerns were raised after the level of radiation in the nearby Miyagi prefecture increased 400-fold. It is not clear at the moment if the radiation came from the local nuclear plant, which was reported to be functioning properly, or drifted up from the Daiichi facility at Fukushima following Saturday's explosion.

Novi pokvareni reaktor, više ozračenih

U nuklearnoj elektrani Fukušima - Daići sinoć je registrovan kvar na rashladnom sistemu još jednog reaktora, zbog čega postoji rizik od nove eksplozije, javio je AFP. Agencija za nuklearnu i industrijsku bezbednost Japana saopštila je da je reč o reaktoru broj tri, ne navodeći dodatne detalje, preneo je AP.

Japan: Gori 4. reaktor, radijacija opasna!

Japanska agencija za nuklearnu bezbednost saopštila je da se čula eksplozija u bloku dva nuklearne elektrane u Fukušimi, da bi nedugo zatim stiglo i saopštenje da gori i četvrti reaktor u elektrani Daići, kao i da je "radijacija dostigla nivo koji može da utiče na zdravlje ljudi".

Prva eksplozija u nuklearki u Fukušimi dogodila se 12. marta i od tada je situacija sve napetija

Glavni sekretar Vlade Japana Jukio Edano je upozorio da svi koji se nalaze u krugu od 30 kilometara od nuklearke treba da ostanu u kućama, kao i da je gotovo celokupno osoblje Daići elektrane - oko 800 ljudi - napustilo postrojenje. Prema Edanovim rečima, u elektrani je ostalo samo oko 50 radnika koji su izloženi opasnosti i koji pokušavaju da ohlade reaktore....

jericho1405: Ovih dana(tacnije 19. marta) ce Mjesec biti najblizi Zemlji u posljednjih nekoliko desetina godina(slicna situacija je bila 2004.), tako da se, na zalost, moze ocekivati jos podrhtavanja kako u Japanu, tako i u drugim zemljama trusnog tla. Takodje, moguce su i erupcije vulkana.

a1200: 
Totalni medijski blackout na delu.

Ovo sa Mesecom je jedna od najvecih gluposti koje sam procitao u skorije vremen.
Za nepucene, kratko i jednostavno:

Mesec NEMA nikakve veze sa ovim niti 'blizina' Meseca moze da utice na zemljotrese i vulkane (osim u glavama astrologa).

"The effects on Earth from a supermoon are minor, and according to the most detailed studies by terrestrial seismologists and volcanologists, the combination of the moon being at its closest to Earth in its orbit, and being in its 'full moon' configuration (relative to the Earth and sun), should not affect the internal energy balance of the Earth since there are lunar tidesevery day," Garvin wrote

Slobodan Miskovic: Kaze : should not.

Ovo su sve pretpostavke. Nema dokaza da je tako ili da nije tako...

???
Polovina svetskih kamera je uperena u te reaktore, znamo vec kako i u kakvim smenama rade cistaci WC-a u Fukosimi, a ti kazes "blackout"?
c,c,c,c....

Meltdown fears in Japan
Published: 15 March, 2011, 09:12
Edited: 15 March, 2011, 15:53

With a fourth explosion rocking the Fukushima nuclear plant on Tuesday, danger of the spent nuke fuel pool boiling and radiation levels at the facility's gate increasing hundredfold, fears of a meltdown in Japan skyrocket.

In his televised address on Tuesday, Japanese Prime Minister Naoto Kan announced that radiation had spread from the three damaged reactors in the Fukushima nuclear plant. A no-fly zone has been imposed over the facility. The prime minister has also asked people living within 30 kilometers of the Fukushima complex to stay indoors to avoid potential health risks from radiation.
The latest, fourth, hydrogen explosion at Unit 4 of the Fukushima facility resulted in a massive fire at the spent fuel storage pond, which reportedly contains over a thousand spent fuel rods. The fire was eventually put out. Unit 4 itself was not operational, but the hydrogen is believed to have released radiation, the Associated Press reports.
The explosion followed another blast, which hit the facility’s Unit 2 just hours earlier. The country’s nuclear safety agency has announced that it suspects the explosion may have damaged the reactor’s container. AP has quoted an agency spokesperson, Shinji Kinjo, as saying that "a leak of nuclear material is feared."
The operator of Fukushima Dai-Ichi nuclear power plant reported earlier that the cooling system of Unit 2 was fully down, which could lead to overheating of the unit and an explosion similar to those that occurred on Friday and Monday. They admit meltdown is a possibility following the four explosions at the complex.
As the level of cooling liquid continued to lower at Unit 2, the reactor’s fuel rods became partially exposed and therefore even less cooled, informed Kyodo news network. The spokesman for the Fukushima government, Masato Abe, stated that Unit 2's fuel rods “were briefly exposed.”
News agency Kyodo has published a status report on the Fukushima reactors. As of Tuesday evening, local time, all four reactors at Fukushima-2 plant have been shut down after cooling failure. The Fukushima-1 reactors however remain of great concern. Three reactors, which were operational at the moment the earthquake struck, are all either confirmed or suspected to have gone into partial core meltdown. Reactor number four also poses a threat despite being under maintenance at the time, because the fire, which followed an explosion of hydrogen, damaged the pool holding spent fuel rods, and the contaminated water may be seeping through.
The incident at Fukushima-1 nuclear power plant has been assigned the sixth level of emergency out of seven according to the INES (International Nuclear Events Scale).
Japanese Chief Cabinet Secretary Yukio Edano confirmed on Tuesday that the radiation levels near the gate of the stricken plant soared to 11930 microsieverts an hour, thousands of times higher than readings before the blast, according to Reuters. That is the equivalent of three years worth of naturally occurring radiation being emitted within a single hour.
By 3pm local time (6am GMT) the radiation level was reported to have dropped by 20 times to 596 microsieverts.
The wind blowing around the plant is Tokyo oriented. Radiation dosage meters located in the capital have registered a radiation increase, but the level is still regarded as safe, Tokyo authorities are reported as saying by Kyodo news agency.
All residents within 20 kilometers of the quake-damaged Fukushima-1 nuclear power plant have been evacuated, says Japan's National Police Agency as reported by NHK broadcaster on Tuesday.
Police are patrolling the 20 to 30 kilometer radius area around the plant and urging residents to stay indoors with their windows shut.
According to weather simulation results released by South Korea's Meteorological Administration on Tuesday, most of the radioactive particles from Japan's damaged nuclear plant in Fukushima will drift toward the Pacific Ocean.
The agency conducted the simulation using the latest weather data to find out how the radioactive particles might spread in the next 24 hours, Japan’s Kyodo news agency reported.
The explosions at the nuclear facilities since Friday's earthquake and tsunami have damaged the cooling systems. Several people have been injured in the blasts, while more than 150 people have been exposed to radiation.
The National Police Agency said that by Tuesday over 10,000 people were confirmed dead or missing, but many unidentified bodies have been detected in quake-hit coastal areas, inevitably raising the death toll, as cited by AP.
Fission out of control
The grim reality is that excessive radiation levels are being detected further and further from the Fukushima-1 nuclear power plant and it is clear the situation is out of control says Dr. Robert Jacobs from the Hiroshima Peace Institute. He adds that its consequences will be devastating for communities and people’s health in Japan.

“There is a growing distress among people in Japan that the information we are receiving is not informing us to the extent that we would like. That does not reduce panic, it just makes people more and more uncertain. They believe they cannot fully trust the information they are being given,” he said.

Placing nuclear power plants in earthquake zones really increases dangers but the main threat of nuclear power as an energy source remains the danger from spent fuel and materials, believes Jacobs.

Vladimir Saenko from Nagasaki University reminds that though radiation is a natural component of everyday life, its potential threat to health depends on the dose a person accumulates.
Saenko admits that the radiation level reported at the Fukushima facility is very dangerous, but the level reported over Japan is still in accordance with the norm.
In addition to staying indoors, wearing protective clothes and masks in order to gain protection from a radiation overdose, people are recommended not to consume food in the streets or that has been exposed to the radiated air.
“Radioactive Iodine is a natural product of the nuclear fuel decay”, says Saenko. “Radioactive Iodine accumulates in the thyroid and it causes high doses that can be accumulated by this organ. And as we know from Chernobyl, thyroid cancer was one of the major consequences. To prevent this so-called thyroid Iodine blockage, measures exist which presume that you take Stable Potassium Iodine pills which block radioactive Iodine.”
If a person suspects that he has received a high dose of radiation, he should immediately seek medical advice, concludes Saenko.

Despite the radiation leak at Fukushima-1 nuclear power plant it is not as disastrous as it was in Chernobyl, but even a tenth of that would be too much, warns Professor Eli Stern, the head of the Center for Risk Assessment at the Gertner Institute of the Sheba Medical Center at Tel Hashomer.

“In this case, if worse comes to worst the Japanese will have to very seriously consider the measures that were taken in Chernobyl, which means to put the damaged core in a big cement sarcophagus to prevent further contamination,” the professor believes.

The situation at Fukushima plant is already the worst case scenario and many experts do not trust the information released by the Japanese authorities and it is evident that the meltdown in two reactors has already occurred, shared Igor Khokhlov, fellow with the Institute of World Economy and International Relations.

“The amount of radiation released now and the amount of radiation that will be released [at Fukushima nuclear power plant] is so great that actually the whole globe will be affected,” Khokhlov estimated, comparing one energy unit affected in Chernobyl and three nuclear power units affected at the Fukushima plant.

“Definitely, it is going to be one of the worst nuclear disasters in world history,” he concluded.

The ongoing crisis at Japan's Fukushima nuclear power plant has been upgraded to a level 6 on the International Nuclear Events Scale. To put this into perspective, the Chernobyl diaster was a level 7, and the Three mile Island accident was a level 5.

Ono sto mene iskreno mnogo vise zabrinjava je liability americkih i narocito evropskih reinsurera za stete u Japanu koje se vec sada mere 10-cifrenim iznosima u dolarima a i dalje rastu. To je angle koji ans sve moze zestoko da kosta a za sada svi mudro cute o tome.

mmix
a Japan ce sad definitivno uci u recesiju.

Ali ono sto razumem, jeste da pokusavaju da medju narodom ne prave paniku. U Tokiju je radio aktivnost vec 20x veca od dozvoljene

Radijacija hiljadu puta viša od dozvoljene

Radijacija dostigla 1.000 mikrosiverta
Japanska vlada vratila je radnike i tehničare u u nuklearnu centralu Fukušima 1, nakon što su oni ranije bili povučeni zbog opasnosti od povećane radijacije. Tako su nastavljeni intenzivni radovi na hlađenju reaktora.

Eksplozije i požari koji su se dogodili u nuklearnoj elektrani Fukošima označene su kao incident šestog stepena prema Međunarodnoj agenciji Ines, iako japanska vlada tvrdi da je u pitanju četvrti stepen. Međunarodni stručnjaci tvrde da incident može preći i u sedmi stepen – do sada je jedino havarija u Černobilju 1986. bila označena najvišim sedmim stepenom.

Radijacija hiljadu puta viša

U eksplozijama i požarima teško je oštećeno četiri od ukupno šest reaktora u Fukušimi. Koncern Tepko, koji je vlasnik elektrane, saopštio je da je u sredu ujutro izbio požar u blokovima tri i četiri.

Radioaktivno zračenje u međuvremenu je dostiglo nove rekordne dimenzije. Portparol Valde Jukio Edano rekao je da je izmereno zračenje u visini od 1.000 milisiverta. Reč je o količini zračenja koja je hiljadostruko veća od dozvoljene količine kojoj jedna osoba tokom cele godine sme da bude izložena. Eksperti navode da zračenje u količini od 100 milisiverta tokom jedne godine može dovesti do pojave karcinoma.

Sva naselja u blizini Fukošime su evakuisana. Brojni građani su bili primorani da potraže smeštaj u privremenim prihvatilištima. Ne postoje ni najgrublje procene koliko će ovo stanje trajati.

Narod beži i iz Tokija

U 240 kilometara udaljenom Tokiju izmeren je nivo radijacije deset puta veći od normalnog, ali te količine još uvek nisu opasne za zdravlje. Ali uprkos tome Tokio izgleda kao za vreme praznika, javljaju agencije, jer je veliki broj stanovnika ostao u svojim kućama. Brojne prodavnice i preduzeća su ostali zatvoreni. Stanovnici Tokija, koji su u mogućnosti, sele se na jug Japana ili pak napuštaju zemlju.

Koncernima koji upravljaju nuklearnim elektranama, kao ni vladinim zvaničnicima – građani više ne veruju: „Oni kažu da ne treba da brinemo. Ali ja se pitam da li oni govore istinu. Veoma sam uplašen“, kaže jedan stanovnik Tokija.

Nakon svega ostaje nada u meteorološke prilike: vetar je u međuvremenu promenio pravac zahvaljujući čemu su radioaktivne čestice usmerene prema moru.

Znali smo da su vredni, ali ne i da su ovoliko brzi i efikasni. Na prvoj slici vidimo urušen asfalt posle zemljotresa i, poučeni domaćim iskustvom, čini nam se da bi za obnovu istog trebalo minimum godinu dana (možda i više).

Ipak, Japanci su za samo četiri dana uspeli da obnove put tako da izgleda kao da se ništa nije dogodilo. Čak su se pozabavili i zasadima između puteva.

“You’re certainly worried about the health and safety of your family, but you have an obligation to stay at the facility,” he said. “There is a sense of loyalty and camaraderie when you’ve trained with guys, you’ve done shifts with them for years.”

Helikopteri bezuspešno hlade Fukušimu

Japanski vojni helikopteri bacili su danas oko 30 tona morske vode na nuklearnu centralu "Fukušima Daići", teško oštećenu cunamijem, u nastojanju da ohlade pregrejano nuklearno gorivo kako ono ne bi počelo da se topi, javlja britanski BBC. Međutim, pokušaji hlađena nuklearke za sada su bez uspeha.

Istovremeno japanska policija je saopštila novi bilans žrtava zemljotresa i cunamija, koji su u petak opustošili severoistočnu obalu Japana: potvrđena je smrt 5.178 ljudi, dok se 8.606 ljudi smatra nestalim.

U hlađenje reaktora u "Fukušimi 1" će se uskoro uključiti i vodeni topovi, a uprava centrale se nada da će tokom dana ponovo uspostaviti dotok struje do postrojenja, što je neophodno da se reaktiviraju sistemi za hlađenje, zaustavljeni u petak, kao i rezervni generatori.

"Ako uspemo da vratimo struju, moći ćemo da aktiviramo razne električne pumpe i da ulijemo vodu u reaktore i bazene za potrošeno nuklearno gorivo", rekla je predstavnica kompanije Tokio elektrik pauer koja upravlja "Fukušimom 1".

IEA: Dramatična situacija

Stanovništvo se evakuiše iz kontaminiranih oblasti

Međunarodna agencija za atomsku energiju (IAEA), sa sedištem u Beču, upozorila je danas da temperature u bazenu za odlaganje istrošenih nuklearnih elemenata u nuklearnom postrojenju Fukušima, dostižu dramatično visoke vrednosti.



U reaktoru 4 je u ponedeljak i utorak izmereno 84 stepeni Celzijusovih, a kako IAEA objašnjava u saopštenju, temperatura u bazenu za odlaganje, pod normalnim okolnostima, trebalo bi da bude ispod 25 stepeni.

I u bazenima za hlađenje u još "dobrim" reaktorima 5 i 6, prema navodima agencije, raste temperatura, i danas je izmereno 60 stepeni. Podaci o reaktoru 1 i 3 nisu navedeni.

U reaktoru 4 postrojenja Fukušima bazen za hlađenje se nalazi van bolje zaštićenog sektora, zbog čega je opasnost posebno velika. "Ukoliko nuklearni elementi ne budu pokriveni vodom ili temperatura dostigne kritičnu tačku, mogli bi postati rizik radioaktivnog ozračenja", upozorila je IEA.

Broj stradalih 14.650

Japanska policija saopštila je danas da je zvaničan broj poginulih i nestalih nakon razornog zemljotresa i cunamija dostigao broj od 14.650 i da je samo za nekoliko časova porastao za 1.000.
Nacionalna japanska policija navodi da je potvrđeno da je broj poginulih porastao na 5.321, dok je zvaničan broj nestalih uvećan na 9.329.
Ukupno je 2.383 povređenih. Međutim, u izveštajima se sugeriše da ovo nije konačan broj.
Japanska novinska agencija Kjodo prenela je juče izjavu zvaničnika iz obalskog grada Išinomaki u prefekturi Mijagi, koji je rekao je da je broj nestalih u toj oblasti najverovatnije 10.000.
Tokom vikenda, japanska državna televizijska stanica NHK javila je da je oko 10.000 nestalo u gradu Minamisanriku, koji je u istoj prefekturi.

Ne uzdam se iskreno puno u male reaktore, glavni problem sa nukelarkama je bezbednost nuklearnog materijala, vise manjih reaktora znaci vecu sansu da neko dodje neovlasceno do goriva. Manje fizicko obezbednjenje, manji pritisci, krace hladnjenje, laske otvaranje reaktora, itd.

21:47 17/03/2011
The water level in a spent nuclear fuel pool at Fukushima No. 1 plant has dropped, creating the possibility of a meltdown, the container of the No. 3 reactor has possibly been damaged and the fuel in the No. 1, 2 and 3 reactors is no longer fully covered with coolant, The Mainichi Daily said on Thursday.
It warned that if no effective countermeasures are implemented, the fuel will melt which could result in a radiation leak.
Up to 64 tons of water was dumped by helicopters and fire trucks on the No. 3 unit, Kyodo said earlier in the day.
However, no major changes were seen in radioactive levels at the plant immediately afterward.
Temperatures are rising in the spent fuel rod pools of the No.3 and No.4 reactors, where a massive radiation leakage is feared.
The government's Nuclear and Industrial Safety Agency said white smoke was billowing from the No. 2 unit, suggesting that a spent nuclear fuel pool in the facility may also be boiling.
The buildings housing the No. 1, No. 3 and No. 4 reactors have been severely damaged by apparent hydrogen blasts, and the No. 2 reactor's containment vessel suffered damage to its pressure-suppression chamber at the bottom.
A series of blasts and fires damaged four of Fukushima's six reactors after a 9.0-magnitude earthquake struck off the northeast coast of Japan last week, sparking a powerful tsunami and killing thousands.
MOSCOW, March 17 (RIA Novosti)

fanfon: Bitno da ti znas sta je tacno. Sta mislis sta se tamo desava kad ni helikopteri ne mogu da se zadrze dovoljno dugo da bi precizno ispustili vodu?

Isak666: Pa onda kazes STA je proizvoljno, a pustis metaraspravu i tema ide dalje.

bobiska: Izbegao bih nabrajanje, da se ne uvrede oni koji su to izneli iz neznanja, a ne iz loše namere. Ma nebitno, nastavite da "divanite", od small talking niko nije umro ;)

Radnicima odbrojani dani

Nemački profesor Edmund Lengfelder s minhenskog instituta za radiologiju izjavio je da će radnici koji su u nuklearki Fukušima sigurno umreti, a prema njegovim rečima, neki imaju još samo nekoliko sedmica života.

Oni će se zaista žrtvovati. 50 odsto onih koji su kontaminirani u Fukušimi umreće za nekoliko sedmica, izjavio je Lengfeder, prenosi "Bild".

Isak666:Nego, fala da si se javio da kazes da znas bolje ;)

bobiska:

Igor Gajic
Zacudjuje me daleko manje angazovanje ljudstva i tehnike u odnosu na Cernobilj...

triac: Ako ti je dosadno imas temu najsmesniji klipovi pa se zanimaj, ocigledno da nemas nista da dodas sem da oponires sve i da se pravis Veliki vrac.

Nadji drugi forum pa se igraj, ne sprdaj se sa tudjim zivotima i problemima
Ljudi koji su tamo ne mogu da se saberu sta i kako,a ne neko ko je upro guzicom na stolicu i naprda...

bobiska: Tvojih 6 postova opravdavaju neukost...

Isak666: 
Ne treba joj davati vecu vaznost i uticaj nego sto ima.

Isak666: ^^
Pa ti si to bas doslovno shvatio, citajuci tvoje postove sa ove i drugih tema, rekao bih ;)

. Kako tvrde u IAEA, situacija je "relativno stabilna" u odnosu na sredu "što je pozitivno".

"Situacija je i dalje veoma ozbiljna u nuklearnoj centrali Fukušima 1. Ali, nije došlo do značajnog pogoršanja od juče", rekao je Grejem Endrju, specijalni savetnik za naučna i tehnička pitanja generalnog direktora IAEA.

"Mislim da je isuviše rano govoriti" o tračku nade, rekao je on na konferenciji za štampu te agencije UN u Beču.

Situacija se "nije pogoršala što je pozitivno. Ali, je u svakom trenutku moguće da se to (pogoršanje) dogodi", rekao je Endrju.

Eksplozije i požari koji su se dogodili u nuklearnoj elektrani Fukošima označene su kao incident šestog stepena prema Međunarodnoj agenciji Ines, iako japanska vlada tvrdi da je u pitanju četvrti stepen. Međunarodni stručnjaci tvrde da incident može preći i u sedmi stepen – do sada je jedino havarija u Černobilju 1986. bila označena najvišim sedmim stepenom.

a1200
My 2c je da stanje mnogo gore nego sto su ga vlada ili zavanicni medji predstavili...

Japanese engineers have succeeded in laying a power cable to the No. 2 reactor of the Fukushima Daiichi nuclear power plant, the International Atomic Energy Agency says, raising hopes that electric water pumps could soon restore cooling.

"They plan to reconnect power to Unit 2 once the spraying of water on the Unit 3 reactor building is completed," the IAEA said in a statement Thursday.

The external grid power line is intended to restart electric pumps for cooling the reactor, which lost its main and backup power supplies following the earthquake and tsunami, causing dangerous overheating of the reactors and spent fuel rod pools.

No precise time was offered for when the power and cooling operation would be restored.

Nivo radijacije van reaktora je vrlo tesko falsifikovati...

a1200
To zvisi i od klimatskih uslova... tj. kuda je duvao vetar u momentu ispustanja najvece koncentracije radioaktivnih materija. Kuda sada duva vetar? Kao i da li ce vetar promeniti pravac, mozda u momentu kad se dogodi sleca eksplozija ili neki eksces? Neko bi takvu sitaciju znao vesto da iskoristi... jednostavno plasirajuci mnogo blazu verziju cele situacije.

Radioaktivno zračenje u međuvremenu je dostiglo nove rekordne dimenzije. Portparol Vlade Jukio Edano rekao je da je izmereno zračenje u visini od 1.000 milisiverta. Reč je o količini zračenja koja je hiljadostruko veća od dozvoljene količine kojoj jedna osoba tokom cele godine sme da bude izložena. Eksperti navode da zračenje u količini od 100 milisiverta tokom jedne godine može dovesti do pojave karcinoma.

Japan raises its level of nuclear accident at Fukushima Daiichi from 4 to 5, Reuters news agency reports quoting the IAEA.

fanfon: Sad je vec jasno da nece biti dobro...

tacka: Šta se dešava u slučaju da svih šest reaktora i 135 t otpada u đe u lančanu reakciju?
A to je mogućnost koja se spominje na više mesta.

mmix: Sto se tice meltdown-a to gorivo iako ce emitovati veliku kolicinu termalne energije nema dovoljno snage da istopi bazen u kom se nalazi, tako da nema rizika od ispustanja ovog goriva u prirodu.

The General Electric-designed nuclear reactors involved in the Japanese emergency are very similar to 23 reactors in use in the United States, according to Nuclear Regulatory Commission records.
The NRC database of nuclear power plants shows that 23 of the 104 nuclear plants in the U.S. are GE boiling-water reactors with GE's Mark I systems for containing radioactivity, the same containment system used by the reactors in trouble at the Fukushima Dai-ichi plant. The U.S. reactors are in Alabama, Georgia, Illinois, Iowa, Massachusetts, Michigan, Minnesota, Nebraska, New Jersey, New York, North Carolina, Pennsylvania and Vermont.

The six reactors at the Fukushima Dai-ichi power plant, which had explosions on Saturday and Monday, are all GE-designed boiling-water reactors, known in the industry as BWRs. Five have containment systems of GE's Mark I design, and the sixth is of the Mark II type. They were placed in operation between 1971 and 1979.

Thirty-five years ago, Dale G. Bridenbaugh and two of his colleagues at General Electric resigned from their jobs after becoming increasingly convinced that the nuclear reactor design they were reviewing -- the Mark 1 -- was so flawed it could lead to a devastating accident.

Questions persisted for decades about the ability of the Mark 1 to handle the immense pressures that would result if the reactor lost cooling power, and today that design is being put to the ultimate test in Japan. Five of the six reactors at the Fukushima Daiichi plant, which has been wracked since Friday's earthquake with explosions and radiation leaks, are Mark 1s.

"The problems we identified in 1975 were that, in doing the design of the containment, they did not take into account the dynamic loads that could be experienced with a loss of coolant," Bridenbaugh told ABC News in an interview. "The impact loads the containment would receive by this very rapid release of energy could tear the containment apart and create an uncontrolled release."

FUKUSHIMA, Japan – In the first sign that contamination from Japan's stricken nuclear complex had seeped into the food chain, officials said Saturday that radiation levels in spinach and milk from farms near the tsunami-crippled facility exceeded government safety limits.

Minuscule amounts of radioactive iodine also were found in tap water Friday in Tokyo and elsewhere in Japan — although experts said none of those tests showed any health risks. The Health Ministry also said that radioactive iodine slightly above government safety limits was found in drinking water at one point Thursday in a sampling from Fukushima prefecture, the site of the nuclear plant, but later tests showed the level had fallen again.

Six workers trying to bring the Fukushima Dai-ichi plant back under control were exposed to more than 100 millisieverts of radiation — Japan's normal limit for those involved in emergency operations, according to Tokyo Electric Power Co., which operates the complex. The government raised that limit to 250 millisieverts on Tuesday as the crisis escalated.

Officials said the crisis at the plant appeared to be stabilizing, with near-constant dousing of dangerously overheated reactors and uranium fuel, but the situation was still far from resolved. Japan's military planned to start dousing one troubled reactor — Unit 4 — for the first time shortly after daybreak Sunday morning.

"We more or less do not expect to see anything worse than what we are seeing now," said Hidehiko Nishiyama of the Nuclear and Industrial Safety Agency.

izvor

Six workers trying to bring the Fukushima Dai-ichi plant back under control were exposed to more than 100 millisieverts of radiation — Japan's normal limit for those involved in emergency operations, according to Tokyo Electric Power Co., which operates the complex. The government raised that limit to 250 millisieverts on Tuesday as the crisis escalated.

etjen

Meni nije samo jasno (apsolutno se ne razumem u problematiku) da je normalan nivo zračenja u Srbiji (dakle i bilo gde manje-više) do 200 nSv/h
a ova priča u Japanu je da je oko elektrane izmereno u jednom trenutku (zvanični podatak) 400 mSv/h

Primetite razliku između mili i nano!

Horvat: ja mislim da je to (250 msv) godisnja efektivna doza (pogledaj zadnji pasus)

etjen: Mislim, šta to znači 250 mSv? Na koji period? Ako se misli na 250 mSv/h zar to nije ogromna doza i sa zaštitnim odelom?
Molim da mi to neko objasni, ako ga ne mrzi

Zeka_SD: Koliko sam ja uspeo negde da pročitam, ovih 400mSv/h je izmereno u pari koja je ispuštana da bi se smanjio pritisak, ali je vreme poluraspada izuzetno kratko (max nekoliko sekundi), tako da je zračenje rapidno opadalo... Apsolutni sam duduk za ovo, pa ako neko ima tačno objašnjenje neka se javi!

Osaka -- U morskoj vodi u okolini nuklearne centrale Fukušima izmeren je povišen nivo radioaktivnih supstanci, saopštila je kompanija Tokio elektrik (TEPCO).

Izmereni nivo joda 131 i cezijuma 134 je 126,7 odnosno 24,8 puta veći od dozvoljene norme koju je odredila japanska vlada, navela je kompanija.

Predstavnik kompanije Naoki Cunoda izjavio je da je nivo cezijuma 137 bio 16,5 puta veći od normale, dok je sa druge strane nivo kobalta 58 niži.

On je istakao da izmereni nivoi radioaktivnih supstanci ne predstavljaju pretnju za zdravlje ljudi.

Prema njegovim rečima, radiaktivne supstance su detektovane u uzorcima morske vode uzete oko 100 metara južno od reaktora 1 nuklearne centrale Fukušime.

Centrala Fukušima pretrpela je 11. marta tešku havariju usled razornog cunamija koji je opustošio severoistočnu obalu Japana.

Sistemi za hlađenje izbačeni su iz stroja, pa je na reaktorima dolazilo do požara, eksplozija i oslobađanja radioaktivnih materija.

izvor

In another advance, emergency crews dumped 18 tons of seawater into nearly boiling storage pool holding spent nuclear fuel, cooling it to 105 degrees Fahrenheit (50 degrees Celsius), Japan's nuclear safety agency said. Steam, possibly carrying radioactive elements, had been rising for two days from the reactor building, and the move lessens the chances that more radiation will seep into the air.

izvor

TOKYO – A spike in radiation levels in Tokyo tap water spurred new fears about food safety Wednesday as rising black smoke forced another evacuation of workers trying to stabilize Japan's radiation-leaking nuclear plant.

Infants are particularly vulnerable to radioactive iodine, which can cause thyroid cancer, experts say. The limits refer to sustained consumption rates, and officials urged calm, saying parents should stop giving the tap water to babies, but that it was no worry if the infants already had consumed small amounts.

They said the levels posed no immediate health risk for older children or adults.

"Even if you drink this water for one year, it will not affect people's health," Chief Cabinet Secretary Yukio Edano said.

Tokyo residents shouldn't worry, said Dr. Lim Sang-moo, director of nuclear medicine at the Korea Cancer Center Hospital in Seoul.

izvor

milivoje t:  Krsko u Hrvatskoj

milivoje t:  A onda je baba izvadila matori grafik radijacije za 1.maj cernobiljske godine u srbiji.
Majko mila bila je radijacija valjda milion puta veca od dozvoljene.

mmix: Ma jeste, bila trilijardu puta veca :) Svuda oko nas je bila 10-20 puta veca od pozadinske ali u samu Srbiju je vetar sve naduvao na milion puta? Daleko od toga da je bilo bezazleno i da nam je trebalo sve to i da se nismo ozracili, jesmo, ali da je bilo milion puta vece od dozvoljenog svi bismo tada vec pomrli od radijacionog trovanja. I ja nisam bio toliko mali kad je to bilo i secam se da je bilo javnih obavestenja da se ne izlazi bez potrebe, da se povrce i voce detaljno ispira, itd i tako nasiroko.
Jedina stvar gora od nemanja informacije je imanje dezinformacije.

milivoje t: Da hvala, nekad se pricao na granici Hr i Slo, sad znam gde je zavrsila.

Evo tv javlja povecan nivo radijacije na Islandu, uskoro u francuskoj i nemackoj. Jeste to malo povecanje, ali i mi cemo popiti dozu od japana.
Ko je gledao onu emisiju o ovoj katastrofi na rts sto vodi ona krakata plavusa, cuo je jednu bitnu stvar. Veci deo emisije su svirali onoj stvari. A onda je baba izvadila matori grafik radijacije za 1.maj cernobiljske godine u srbiji.

Majko mila bila je radijacija valjda milion puta veca od dozvoljene. Po pravilima trebali smo da sedimo u zatvorenim kucama. Ta baba je merila, bila odgovorna za to. A SFRJ glavonje zabranile da se pravi podaci izbace u javnost. Lagali su. Pricali su da je mala doza. Ustvari nam je bila ebana majka dok smo bili na uranku na radioaktivnoj rosi po kojoj su se deca valjala dok smo obrtali razanj.

Horvat: evo shot tog grafikona (na zalost jako los kvalitet,kaku su stavili na rts, sto se tice kv. snimka), vidi se da je za 1. maj vrsna tacka "u tri lepe", koliko je tacna brojka ne znam (ne vidim), al zena kaze da je preko 10 na 7 (10 milja)

mmix: Osnovno pozadinsko zracenje zemljista u Srbiji je prosecno oko 75 µSV na godisnjem nivou (50-100 u zavisnosti od grada) i to je najslabiji izvor koji nas zraci pa uzmimo njega (ne secam se tacno izvora, bilo je u nekom zborniku radova iz Vince), podeljeno na 365 dana to je oko 200nSv/dan. Da je doza samo tog zracenja bila 10 miliona puta veca prvog maja za taj jedan dan bi prosecno zracenje bilo 2Sv/dan, za taj jedan dan bi covek akomulirao 2Sv i dobio bi masovno radijaciono trovanje populacije sa garantovanim smrtnim ishodom za skoro celu populaciju usled nemogucnosti organizovanja pomoci ozracenima, dakle SAMO za jedan dan. Posto ta radijacija ne bi otisla tek tako, zracilo bi iz dana u dan dok u roku od desetak dana ne bi unistilo sav zivot u Srbiji. A posto smo jos bili super u odnosu na ostatak evrope ispada da bi sada cela evropa trebala da bude nuklearna pustinja. Posto se to ocigledno nije desilo njena merenja su netacna.

TOKYO – Two weeks after an earthquake and tsunami triggered a crisis at a nuclear plant, the government said Friday there is a suspected breach at a reactor — another setback that would mean radioactive contamination at the facility is more serious than once thought.

Japanese leaders defended their decision not to evacuate people from a wider area around the plant, insisting they are safe if they stay indoors. But officials also said residents may want to voluntarily move to areas with better facilities, since supplies in the tsunami-devastated region are running short.

...

The uncertain nuclear situation again halted work at the Fukushima Dai-ichi complex, where authorities have been scrambling to stop the overheated facility from leaking dangerous radiation. Low levels of radiation have been seeping out since the March 11 quake and tsunami knocked out the plant's cooling system, but a breach could mean a much larger release of contaminants. The most likely consequence would be contamination of the groundwater.

izvor i ostatak

milivoje t: Normalan covek, kaze ok pogresio sam. Idemo dalje. Nista strasno mi nismo nuklearni fizicari koji se bave merenjem zracenja.

milivoje t
Ali ti brate si se ladno iscimao da pises neki esej, samo da ne bi ispalo kako si pogresio. Sta god mislio, pateticno je. Zena koja je magistar nauka i koja je merila zracenje na taj dan je izjavila da je bilo 10 na 7 puta vece nego obicno. Imala grafik u rukama, valjda zna sta na njemu pise. Pored nje su sedela dva nuklearna fizicara doktora nauka i nisu joj rekli da gresi. Ali vi sa foruma znate da baba gresi ?

milivoje t: Normalan covek, kaze ok pogresio sam. Idemo dalje. Nista strasno mi nismo nuklearni fizicari koji se bave merenjem zracenja.

milivoje t:  I ja imam diplomu vikipedije i mikrosofta da znam da pilotiram boingom 737 :).

TOKYO – Emergency workers struggling to pump contaminated water from Japan's stricken nuclear complex fled one of the troubled reactors Sunday after reporting a huge spike in radioactivity, with levels 10 million times higher than normal in the reactor's cooling system, officials said.

The numbers were so high that the worker measuring radiation levels withdrew before taking a second reading, officials said.

izvor i ostatak

The death toll from the twin disasters stood at 10,668 Sunday, with more than 16,574 people missing, police said. Hundreds of thousands of people are homeless.

This has since been denied by Japanese officials as a misread by one of the employees working inside the plant, prompting all of the workers to flee before a second reading could be taken to confirm. [121]

vladd: 
I nije problem u bezbednosti gradjana, kada bi se prosto proizvodila struja, ali neobuzdani profit, pravi razne "poslovne" kombinacije, tako da je u Fukusimi Daici problematican i zavijen maglom tajne samo treci reaktor, sa mix gorivon, sa plutonijumom(koji se inace ne koristi u konvencionalnim nuklearkama, namenjenim proizvodnji struje), i zdravo se sumnja da su u pitanju vojne potrebe...

Poz

MOX fuel is an alternative to low enriched uranium (LEU) fuel used in the light water reactors that predominate nuclear power generation.

a1200: Neko je odlucio da ustedi, i sad se to celoj zemlji obilo o glavu...

a1200: Jbt. kad mogu da naprave aerodrom na totalno vestackom ostrvu... mogli su da narave vestacko brdo/plato od 40-50m visine, sa nekim odvodnim kanalima ispod (da se voda ne bi prelivala preko brda u najgorem slucaju) - i svega ovoga ne bi bilo. Najace objasnjenje iz teksta je da "nisu predvideli" - kako nisu kad je u njihovoj istoriji bilo i vecih cunamija (na primer, 1993: Okushiri, Hokkaido, Japan ~31 metar!). Neko je odlucio da ustedi, i sad se to celoj zemlji obilo o glavu...

http://www.2mkonline.com/2011/03/11/japan-tsunami-history/
http://en.wikipedia.org/wiki/Historic_tsunamis

a1200: 
Nikad nisi cuo da se grade masivni "subovi", tj. stub ciji je radijus neuporedivo veci od visine - onda se napravi grid od takvih kruznih oblika i na njega se stavi betonski plato... na kojem se nesto gradi.

a1200: Ti si izgleda definitivno ogranicen - ajde polako procitaj ceo prethodni post.

Odin D.: ^Da, stamparsku gresku si ispravio pasusom ...

a1200: Ma moglo je na milion stvari da se utice... zasto su bas morali da je grade na obali? Sigurno su mogli da je izgrade u unutrasnjosti ostrva - i cela stvar bi bila mnogo bezbednija. Ipak to je zemlja sa istorijom cunamija...

TOKYO – Japan's prime minister insisted Tuesday that the country was on "maximum alert" to bring its nuclear crisis under control, but the spread of radiation raised concerns about the ability of experts to stabilize the crippled reactor complex.

...

Police said more than 11,000 bodies have been recovered, but the final death toll is expected to exceed 18,000. Hundreds of thousands remain homeless, their homes and livelihoods destroyed. Damage could amount to $310 billion — the most expensive natural disaster on record, the government said.

...

An AP investigation following the tsunami found that TEPCO officials had dismissed scientific evidence and geological history that indicated that a massive earthquake — and subsequent tsunami — was far more likely than they believed.

izvor i ostatak

More than 10,000 people have died in the Japanese tsunami and the survivors are cold and hungry. But the media concentrate on nuclear radiation from which no-one has died - and is unlikely to.

mmix: I nas TENT vuce vodu iz Dunava

burex: Zašto?

mmix: Sto se tice ostalih, svi se povlace trajno iz elektrane kad im dozimetri otkucaju 250mSv ukljucujuci tu i onu 50-ricu.

The battle for Fukushima is lost

Published: 31 March, 2011, 07:13
Olesya Khantsevich

­Japan has lost the battle to rescue the Fukushima nuclear reactor, where preventing a large radiation release is practically impossible, conclude Western experts. Meanwhile, Japanese authorities are taking additional measures to prevent a manmade disaster – the European press calls them “desperate.” In particular, they are planning to cover the damaged power generating units with fabric domes. Experts from various countries are urging the creation of an international commission on nuclear safety, which would consult authorities in similar situations and inform the public about health hazards.

The British newspaper The Guardian reported that, with each passing day, the risk of a massive release of radiation at Fukushima is rising.

“The radioactive core in a reactor at the crippled Fukushima nuclear power plant appears to have melted through the bottom of its containment vessel and onto a concrete floor, experts say,” the publication reported. It references America’s leading nuclear expert, Richard Lahey, who headed the safety research for boiling-water reactors at General Electric when the company installed the power generating units at Fukushima. According to him, the major concern is when the fuel reacts with the drywell underneath the concrete floor and releases radioactive gases. The drywell is enclosed in a protective chamber, but it was most likely damaged during the hydrogen explosion.

“It's not going to be anything like Chernobyl, where it went up with a big fire and steam explosion, but it's not going to be good news for the environment,” said Lahey. He advocates creating an international group of nuclear safety experts that could consult the authorities of various countries in emergency situations.

It seems that the concerns of the specialists are being realized. Yesterday, smoke was seen at the nuclear power plant, which also increases the risk of radiation release. The content of radioactive iodine in seawater close to Fukushima was slightly higher than was reported earlier. In an isolated place, located 300 meters from the shore, it exceeded the maximum allowable level by 3,355 times.

The chairman of the board of directors of the power plant’s operating company, Tepco, Tsunehisa Katsumata, told journalists that the first four reactors of the distressed nuclear power plant cannot be repaired, and confirmed that the situation will remain “unstable” throughout the coming weeks. He added that the first four reactors have not yet been brought under control, but specialists “are making maximum efforts to cool them.”

Meanwhile, it became known that the Japanese authorities are trying new measures to prevent the consequences of the accident. It is planned to cover the damaged reactors with domes of special fabric, which should prevent further distribution of radioactive particles. This applies to reactors 1, 3 and 4, the buildings of which were severely damaged in the first days of the catastrophe, when hydrogen explosions periodically occurred inside. However, experts are skeptical of the idea, insisting that the real threat is not posed by radioactive dust, but by the contamination of water, which could seep into the ocean and the ground. Collection of the radioactive water that is being pumped from the turbine halls of the reactors will involve a tank vessel, which will be docked at a pier near the nuclear power plant.

Today, French President Nikolas Sarkozy will arrive in Japan – he will be the first foreign leader to travel to the country since the destructive earthquake and tsunami on March 11. He will express solidarity with the Japanese people and offer the assistance of French Avera specialists, as well as “flex France’s nuclear muscles,” reported the Spanish newspaper El Pais. The United States has also become involved in helping with emergency operations at the nuclear power plant – it sent a shipment of radiation-resistant robots to Japan. Russia’s Foreign Affairs Ministry issued a special address to Russian citizens, in which it asked to abstain from traveling to Japan in connection to the radiation threat.

Meanwhile, the press noted a decline in consumer confidence toward food products from Japan. Foreign companies are refusing to purchase Japanese seafood out of fears of them being exposed to radiation, Hiromi Isa, the trade office director at Japan's Fisheries Agency, said in an interview with Bloomberg. Since March 11, at least 10 orders for the supply of seafood have been recalled, despite the assurances of the Japanese government that they do not pose any threat. Many countries, starting with Australia and ending with the US and Russia, have reduced the import of Japanese seafood after the radiation levels outside of the evacuation zone around Fukushima nuclear power plant were raised. A fall in demand, however, is often psychological in nature, note restaurateurs and vendors.

Molten radioactive fuel caused new water leakage at Fukushima

The operator of the troubled Fukushima nuclear plant in Japan revealed the damage to one of the reactors is worse than had previously been thought.
Tokyo Electric Power Co., which operates the Fukushima-1 power plant, said it discovered that molten nuclear fuel burned through the walls of reactor No. 1 early on in the crisis.

“Operation Water Sarcophagus” will have to be corrected because of radioactive water leaking through the holes burned by the molten fuel, Tepco officials said on Thursday.

The plan involved cooling the reactor by pumping in eight tons of water every hour into each reactor shell and protective shelter.

Earlier on Wednesday, experts discovered that the level of water in the reactor is five meters lower than it should be. At first the source of the water leakage was not immediately known, but it was suspected to be coming from the basement of the turbine building where radioactive water leaking from the reactor has been pooling for weeks.

Later the experts found out that the decrease in water level in the reactor had actually caused the fuel rods to melt and descend onto the floor bed of the reactor, burning yet more holes for the water to escape through.

Efforts to stabilize the situation at the site have been going on for two months now. Highly radioactive water inside the Unit 2 reactor building has disrupted work before and a leakage into the ocean in April caused widespread concern.
According to Robert Jacobs, a professor at the Hiroshima Peace Institute, the true scale of the crisis will take years to assess.

“The government in Japan is really not in a position to take control of the plant. They will have to depend on the professionals who work
for Tepco. The affairs are much more serious than we were told earlier,” stated Jacobs.

Jacobs also believes a meltdown at the plant has been hushed up.

“We were not told that for a long time, probably because Tepco did not even realize it for a long time'" he stated. "I have a rule of thumb, which is that anything that is publicly stated is probably around 10 to 20 percent of what’s true. It will take us years to know the extent of the contamination and the extent of the fuel melting. The best-case scenario in this situation is that it will take months to begin to stop leaking the radiation from the reactors.”