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Investigations into the Fukushima nuclear accident

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significant radiation doses. Predicted future cancer deaths due to accumulated radiation exposures in the population living near Fukushima have ranged from none to 100 to a non-peer-reviewed "guesstimate" of 1,000. On 16 December 2011, Japanese authorities declared the plant to be stable, although it would take decades to decontaminate the surrounding areas and to decommission the plant altogether.
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kept secret to protect its intellectual property rights, and that disclosure would offer information to possible terrorists. NISA ordered TEPCO to send the manuals without any redaction, as the law orders. 200 pages were released from the accident procedural manuals used for Fukushima Daiichi nuclear power plant. All their contents were published, only the names of individuals were left out.
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actually taking place at the plant. TEPCO concluded that the direct cause of the accident was the tsunami which knocked out the reactors' cooling system. TEPCO also admitted that it was at fault in not being prepared for the situation, but said that its workers did the best they could "amid unprecedented circumstances."
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As reported earlier, a 400 millisieverts (mSv) per hour radiation dose observed at Fukushima Daiichi occurred between 1s 3 and 4. This is a high dose-level value, but it is a local value at a single location and at a certain point in time. The IAEA continues to confirm the evolution and value of this
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published a large portion of Tokyo Electric Power Company's procedural manuals for nuclear accidents. These were the manuals that the operator of the Fukushima Daiichi nuclear power plant earlier did send to the Lower House with most of the contents blacked out, saying that this information should be
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On 20 June 2012, TEPCO released its final internal investigation report. In the report, TEPCO complained that top politicians, including the prime minister, interfered with recovery efforts during the initial stages of the disaster by making specific requests that were out of touch with what was
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At the Fukushima Daiichi NPS, all the off-site power supply was lost due to the earthquake. Later, the subsequent arrival of the tsunami caused flooding of many cooling seawater pumps, emergency diesel generators (EDGs), and power panels which were housed in low-lying rooms. This resulted in the
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A few of the plant's workers were severely injured or killed by the disaster conditions resulting from the earthquake. There were no immediate deaths due to direct radiation exposures, but at least six workers have exceeded lifetime legal limits for radiation and more than 300 have received
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toured the plant and issued a statement that the situation was "worse than reported." He sent a letter to Japanese Ambassador Ichiro Fujisaki urging Japan to seek international help to relocate spent fuel rods stored in unsound structures and prevent leakage of dangerous nuclear material.
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In the intense heat and pressure of the melting reactors, a reaction between the nuclear fuel metal cladding and the remaining water surrounding them produced explosive hydrogen gas. As workers struggled to cool and shut down the reactors, several
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TEPCO thought that in a serious incident, venting pressure in the reactor containment vessels or carrying out other safety procedures would still be possible, because emergency power sources would still be
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dose rate .... because of this detected value, non-indispensable staff was evacuated from the plant, in line with the Emergency Response Plan, and that the population around the plant is already evacuated.
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The agency said, the decision to publish the manuals was taken, for transparency in the search what caused the nuclear accident in Fukushima and also to establish better safety measures for the future.
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had been released "into the atmosphere in March last year alone" although it has been said staff may have been told to lie, and give false readings to try and cover up true levels of radiation.
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The Japanese government estimates the total amount of radioactivity released into the atmosphere was approximately one-tenth as much as was released during the Chernobyl disaster.
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Significant amounts of radioactive material have also been released into ground and ocean waters. Measurements taken by the Japanese government 30–50 km from the plant showed
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On 28 February 2012, the Independent Investigation Commission on the Fukushima Nuclear Accident by the Rebuild Japan Initiative Foundation announced an investigation report.
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On 2 December 2011, ICANPS issued an interim report. On 23 July 2012, the government appointed the committee submitted its final report to the Japanese government.
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rod pools dropped, the reactor fuel rods began to overheat severely, and to melt down. In the hours and days that followed, Reactors 1, 2 and 3 experienced full
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On 5 July 2012, NAIIC released an executive summary report of The Fukushima Nuclear Accident. The panel is due to deliver its final report at the end of July.
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ordered TEPCO to resubmit the manuals by 28 September 2011 without hiding any of the content. TEPCO replied that it would comply with the order.
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that it had failed to take stronger measures to prevent disasters for fear of inviting lawsuits or protests against its nuclear plants.
160:(TEPCO), the earthquake and tsunami caused the compound accident (hereinafter called Fukushima Daiichi Nuclear Accident) consisting of 2813: 2681: 2362: 2165: 1809: 1787: 1767: 1422: 603: 429: 349: 115: 2670: 1604: 1009: 738: 297: 91: 704: 2953: 2084: 179:
In response to the early events of this accident, Japanese government declared a nuclear emergency situation and established the
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TEPCO should examine why the equipment failed to work and should take appropriate actions to prevent such failures in the future
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smaller amounts of this heat normally continue to be released for years, but are not enough to cause fuel melting.
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After the batteries and power supply boards were inundated on 11 March, almost all electricity sources were lost
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Investigation Committee on the Accident at the Fukushima Nuclear Power Stations of Tokyo Electric Power Company
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Investigation Committee on the Accident at the Fukushima Nuclear Power Stations of Tokyo Electric Power Company
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Investigation Committee on the Accident at the Fukushima Nuclear Power Stations of Tokyo Electric Power Company
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By the way, Units 1-3 were operating at the time of the accident; Units 4, 5 and 6 were in planned shutdown.
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Investigation Committee on the Accident at Fukushima Nuclear Power Stations of Tokyo Electric Power Company
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severe core damage accidents, Unit 1, 2, 4 hydrogen explosion accidents, radioactive releases and so on.
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levels high enough to cause concern, leading the government to ban the sale of food grown in the area.
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On 24 October 2011 the first meeting was held by a group of 6 nuclear energy specialists invited by
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F. Tanabe, Journal of Nuclear Science and Technology, 2011, volume 48, issue 8, pages 1135 to 1139
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automatically, and emergency generators came online to control electronics and coolant systems.
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TerraFly Timeline Aerial Imagery of Fukushima Nuclear Reactor after 2011 Tsunami and Earthquake
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Five Years after the Fukushima Daiichi Accident: Nuclear Safety Improvements and Lessons Learnt
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After Tour of Fukushima Nuclear Power Station, Wyden Says Situation Worse than Reported
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plants should be able to maintain electricity during an earthquake or other emergencies
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National Diet of Japan Fukushima Nuclear Accident Independent Investigation Commission
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National Diet of Japan Fukushima Nuclear Accident Independent Investigation Commission
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National Diet of Japan Fukushima Nuclear Accident Independent Investigation Commission
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National Diet of Japan Fukushima Nuclear Accident Independent Investigation Commission
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TEPCO did not make sufficient preparations to cope with critical nuclear accidents.
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Reports published by investigation committees, the Japanese government and TEPCO
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TEPCO did not envision such a power failure or any kind of prolonged power loss.
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The accident was initially assessed by Japanese officials as Level 4 on the
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to discuss the lessons to be learned from the accidents in Fukushima.
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as the first independent investigation commission on 8 December 2011.
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Satellite image on 16 March 2011 of the four damaged reactor buildings
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As the water boiled away in the reactors and the water levels in the
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Act on Special Measures Concerning Nuclear Emergency Preparedness
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Japanese nuclear power plants should have multiple power sources
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produced in the first few days after nuclear reactor shutdown.
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PreventionWeb Japan: 2011 Fukushima Daiichi nuclear disaster
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The Fukushima Daiichi Accident Report by The Director General
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Fukushima Nuclear Accident Analysis Report (Interim Report)
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Hydrogen explosions Fukushima nuclear plant: what happened?
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2011 off the Pacific coast of Tohoku Earthquake and tsunami
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Immediately after the earthquake, the remaining Units 1-3
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Investigations into the Fukushima Daiichi nuclear disaster
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A Study of the Fukushima Daiichi Nuclear Accident Process
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systems stopped for a long time from cutting power, the
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Level 7 (ratings by Japanese authorities as of 11 April)
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Fukushima report: Key points in nuclear disaster report
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Fukushima Daiichi’s Achilles Heel: Unit 4′s Spent Fuel?
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Comparison of Fukushima and Chernobyl nuclear accidents
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Lists of nuclear disasters and radioactive incidents
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Tepco admitted for the first time on 12 October 2012
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by Kenichi Ohmae, Team H2O Project. 28 October 2011
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Tokyo Electric Power Company Internal Investigation
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At the 2660: 2327: 2317: 2278: 2264: 2256: 2237:Nuclear power in Japan, section Seismicity 2232: 2206: 2027: 1757: 1736: 1722: 1714: 28: 1331:From these documents could be concluded: 1137: 746:Japan raises nuclear alert level to seven 598:This name of the earthquake is chosen by 156:(Fukushima Daiichi NPS), operated by the 1099: 120:began on 11 March 2011 when a series of 2671:Japanese Atomic Energy Commission(JAEC) 1521:Executive Summary of the Interim Report 393: 296:As part of the government inquiry, the 181:Nuclear Emergency Response Headquarters 154:Fukushima Daiichi Nuclear Power Station 134:Fukushima Daiichi Nuclear Power Station 1856:Leaks and dumping of radioactive water 1161:from the original on 24 January 2014. 923:from the original on 20 February 2014 684:from the original on 13 January 2012. 7: 2948: 1669:In graphics: Fukushima nuclear alert 1262:Sheldrick, Aaron (12 October 2012). 1206:Tepco lashes prime minister's office 1119:from the original on 3 February 2014 852:Caracappa, Peter F. (28 June 2011), 779:Japan mulls Fukushima food ban: IAEA 531:from the original on 21 August 2011. 302:Nuclear and Industrial Safety Agency 1289:Yamaguchi, Mari (12 October 2012). 1231:Fackler, Martin (12 October 2012). 414:from the original on 11 March 2014. 211:due to the normal high radioactive 2976:Fukushima Daiichi nuclear disaster 2166:Japan Trench Fast Drilling Project 1768:Fukushima Daiichi nuclear disaster 1745:2011 Tōhoku earthquake and tsunami 1050:from the original on 24 March 2011 990:from the original on 14 April 2014 604:Fukushima Daiichi nuclear disaster 480:Fukushima Daiichi Nuclear Accident 432:from the original on 14 March 2011 350:List of civilian nuclear accidents 198:A process overview of the accident 116:Fukushima Daiichi Nuclear Disaster 25: 2740:Japan Atomic Energy Agency (JAEA) 2676:Nuclear Regulation Authority(NRA) 2244:Nuclear and radioactive incidents 833:from the original on 9 March 2014 766: 739:International Nuclear Event Scale 650:Bulletin of the Atomic Scientists 607: 600:Japan Meteorological Agency (JMA) 426:"IAEA Update on Japan Earthquake" 298:House of Representatives of Japan 130:releases of radioactive materials 104:2 workers taken to hospital with 2947: 2936: 2935: 2762:Japan Electric Association(JEA) 2573:prototype fast (breeder) reactor 2231: 2205: 35: 2218:Seismicity of the Sanriku coast 1664:IAEA Update on Japan Earthquake 1611:(the improved above in English) 948: 893:from the original on 5 May 2014 251:(NAIIC) was established by the 1182:. 23 July 2012. 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NPR. 9 March 2012. 752:11 March 2013 at the 578:16 April 2011 at the 334:United States Senator 164:(SBO) incident, Unit 2211:Japanese earthquakes 2181:2011 local elections 2014:(7.0, 20 March 2021) 1990:(6.6, 11 April 2011) 1459:4 April 2014 at the 1157:. 28 December 2011. 1138:ICANPS_summary(2011) 919:. 16 December 2011. 388:Notes and references 238:Investigation Groups 78:Fukushima Prefecture 2051:Operation Tomodachi 1984:(7.1, 7 April 2011) 1978:(7.3, 9 March 2011) 1589:(Unofficial Report) 1427:Wall Street Journal 1363:11 May 2011 at the 1100:NAIIC_summary(2012) 662:2011BuAtS..67e..27V 462:on 17 February 2013 209:reactors overheated 31: 2616:Under construction 2391:Kashiwazaki-Kariwa 2156:No.18 Kyotoku-maru 2080:Wrestling in Japan 1824:Sequence of events 1237:The New York Times 1204:Nagata, Kazuaki, " 861:ANS Annual Meeting 807:on 15 October 2013 543:Chernobyl disaster 492:Fukushima Dai-ichi 126:core melt and down 122:equipment failures 99:Non-fatal injuries 2963: 2962: 2902:Rokkasho Rhapsody 2886:Reiwa Shinsengumi 2876:Kiyoshiro Imawano 2814:List of incidents 2787: 2786: 2664:Regulatory bodies 2652: 2651: 2545: 2544: 2381:Fukushima Daiichi 2253: 2252: 2186:Miracle Pine Tree 2098: 2097: 1960: 1959: 1851:Radiation effects 1810:Higashidori plant 1487:Executive summary 1455:, 16 April 2012. 1448:, from Office of 1429:, 17 April 2012. 1403:on 9 January 2017 1297:on 5 October 2013 1243:on 6 October 2014 1046:. 15 March 2011. 889:. 15 March 2012. 410:. 12 April 2011. 140:on the same day. 111: 110: 16:(Redirected from 2983: 2951: 2950: 2939: 2938: 2923:Jinzaburo Takagi 2908:Ryuichi Sakamoto 2856:Mizuho Fukushima 2846:Genpatsu-shinsai 2661: 2328: 2318: 2280: 2273: 2266: 2257: 2235: 2234: 2225:List of tsunamis 2209: 2208: 2191:Shinkansen Relay 2028: 2006:Fukushima, Japan 2000:Fukushima, Japan 1988:Fukushima, Japan 1758: 1738: 1731: 1724: 1715: 1648: 1646: 1634: 1632: 1610: 1588: 1579: 1577: 1552: 1542: 1533: 1524: 1505: 1494: 1492: 1463: 1443: 1437: 1419: 1413: 1412: 1410: 1408: 1399:. 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Springer. 1595: 1587:. 日本電気協会新聞部. 1584: 1571: 1548: 1538: 1529: 1520: 1500: 1486: 1441: 1417: 1405:. Retrieved 1401:the original 1391: 1371: 1351: 1327: 1319: 1311: 1299:. Retrieved 1295:the original 1284: 1272:. Retrieved 1268:the original 1257: 1245:. Retrieved 1241:the original 1236: 1226: 1209: 1200: 1188:. Retrieved 1184:the original 1176: 1167: 1154: 1145: 1133: 1121:. Retrieved 1106: 1095: 1082: 1064: 1052:. Retrieved 1043: 1034: 1022:. Retrieved 1018:the original 1013: 1004: 992:. Retrieved 983: 974: 965: 956: 937: 925:. Retrieved 916: 907: 895:. Retrieved 884: 875: 866:13 September 864:, retrieved 860: 847: 835:. Retrieved 821: 809:. Retrieved 805:the original 798: 788: 774: 767:ICANPS(2011) 762: 733: 719:. Retrieved 715:the original 708: 692: 656:(5): 27–36. 653: 649: 636: 615: 608:ICANPS(2011) 594: 582: 563:. Retrieved 559:the original 552: 537: 524: 515: 485:福島第一原子力発電所事故 476: 464:. Retrieved 460:the original 450: 441: 434:. 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CNN. 1014:Yomiuri 994:13 July 800:Reuters 658:Bibcode 629:Toshiba 88:Outcome 52: ( 2584:Magnox 2550:Closed 2514:Genkai 2509:Sendai 2501:Kyushu 2450:Mihama 2437:Kansai 2350:Tohoku 2340:Tomari 2090:Taiwan 1870:Topics 1783:Unit 3 1778:Unit 2 1773:Unit 1 1603:  1551:. 講談社. 1024:8 June 811:24 May 721:24 May 676:  330:Oregon 292:Others 128:, and 2755:Other 2745:Dōnen 2632:Other 2569:Monju 2557:Fugen 2491:Ikata 2427:Shika 2401:Chubu 2373:TEPCO 2144:Other 2130:Books 2125:Manga 2120:Songs 2110:Films 1645:(PDF) 1631:(PDF) 1576:(PDF) 1491:(PDF) 1088:NAIIC 1054:8 May 857:(PDF) 769:p.303 674:S2CID 82:Japan 2686:NISA 2684:and 2639:Jōyō 2602:Maki 2524:JAPC 1601:ISBN 1409:2017 1303:2012 1276:2012 1249:2012 1192:2012 1177:The 1125:2019 1056:2011 1044:IAEA 1026:2011 996:2011 929:2012 899:2012 868:2011 839:2012 813:2012 723:2012 610:p.19 567:2013 468:2011 438:2011 321:NISA 309:NISA 266:The 247:The 220:fuel 92:INES 68:and 47:Date 2724:JCO 2623:Ōma 2562:ATR 2323:LWR 1208:", 1140:p.1 984:CNN 951:p.1 886:NPR 698:PBq 666:doi 332:'s 2972:: 2445:Ōi 1671:- 1425:, 1359:. 1235:. 1175:. 1153:. 1042:. 1012:. 982:. 915:. 883:. 859:, 797:. 707:. 680:. 672:. 664:. 654:67 652:. 648:. 551:. 523:. 494:( 488:, 440:. 428:. 404:. 226:. 172:, 168:, 124:, 80:, 76:, 72:, 2279:e 2272:t 2265:v 1737:e 1730:t 1723:v 1647:. 1633:. 1609:. 1578:. 1532:. 1523:. 1504:. 1493:. 1411:. 1305:. 1278:. 1251:. 1194:. 1127:. 1058:. 1028:. 998:. 931:. 901:. 841:. 815:. 725:. 668:: 660:: 631:. 569:. 509:) 482:( 470:. 174:3 170:2 166:1 56:) 20:)

Index

Investigations into the Fukushima Daiichi nuclear disaster

Futaba-machi
Okuma-machi
Futaba-gun
Fukushima Prefecture
Japan
INES
radiation burns
Fukushima Daiichi Nuclear Disaster
equipment failures
core melt and down
releases of radioactive materials
Fukushima Daiichi Nuclear Power Station
2011 off the Pacific coast of Tohoku Earthquake and tsunami
2011 off the Pacific coast of Tohoku Earthquake
Fukushima Daiichi Nuclear Power Station
Tokyo Electric Power Company
1
2
3
caesium-137
nuclear reactor coolant
reactors overheated
decay heat
fuel
meltdown
hydrogen-air
National Diet of Japan Fukushima Nuclear Accident Independent Investigation Commission
National Diet of Japan

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