{"id":7810,"date":"2025-04-26T13:27:56","date_gmt":"2025-04-26T04:27:56","guid":{"rendered":"https:\/\/www.envraddb.go.jp\/entesttest\/?page_id=7810"},"modified":"2025-11-28T15:52:33","modified_gmt":"2025-11-28T06:52:33","slug":"t1","status":"publish","type":"page","link":"https:\/\/www.envraddb.go.jp\/en\/general\/toden\/t1\/","title":{"rendered":"TEPCO Fukushima Daiichi Nuclear Power Station Accident"},"content":{"rendered":"
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This nuclear power plant accident was caused by the Great East Japan\r\n Earthquake (magnitude 9.0) and the resulting tsunami on March 11, 2011. At the time of the earthquake, the TEPCO\r\n Fukushima Daiichi Nuclear Power Plant was able to safely shut down its operating reactors and secure power\r\n through the automatic startup of emergency diesel generators. However, the huge tsunami that followed inundated\r\n the main facilities and power supply equipment, rendering them inoperable and causing the loss of important\r\n safety functions. The loss of the reactor's cooling system resulted in a hydrogen explosion and the release of a\r\n large amount of radioactive material. As a result, approximately 160,000 residents of Fukushima Prefecture were\r\n evacuated (60,000 out of the prefecture and 100,000 within the prefecture) in May 2012.\r\n This accident is rated Level 7 (severe accident) on the International Nuclear Event Scale (INES), the same as\r\n the accident at the Chornobyl Nuclear Power Plant in the former Soviet Union (now Ukraine).\r\n <\/p>\r\n\r\n\r\n

\r\n \"Condition\r\n Condition of Unit 1 at the TEPCO Fukushima Daiichi Nuclear Power Plant after the Hydrogen Explosion
Source\uff1a<\/span>TEPCO Holdings
(https:\/\/photo.tepco.co.jp\/date\/2012\/201209-j\/120911-07j.html<\/a>)
(Accessed October 1, 2024)<\/cite>\r\n <\/figure>\r\n\r\n
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TEPCO Fukushima Daiichi Nuclear Power Station Accident-Related Data Search<\/h2>\r\n <\/div>\r\n\r\n

You can search the following page for data on the results of fallout and land water (tap water) radioactivity surveys conducted immediately after the accident at TEPCO's Fukushima Daiichi Nuclear Power Station.<\/p>\r\n\r\n

\r\n TEPCO Fukushima Daiichi Nuclear Power Station Accident-Related Data Search<\/a>\r\n <\/div>\r\n\r\n\r\n\r\n
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*Click here for the Nuclear Regulation Authority's page. > <\/p>\r\n\r\n

\r\n Monitoring of fallout at a scheduled time<\/a>\r\n <\/div>\r\n
\r\n Monitoring drinking water (tap water)<\/a>\r\n <\/div>\r\n\r\n <\/div>\r\n\r\n
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Environmental Radiation Database<\/h2>\r\n <\/div>\r\n

\r\n In addition, please use the Environmental Radiation Database to search for data on the results of environmental radioactivity surveys conducted by the Nuclear Regulation Authority with the cooperation of related ministries and agencies, 47 prefectures, etc.<\/p>\r\n

\r\n Environmental Radiation Database<\/a>\r\n <\/div>\r\n

Reference\uff1a<\/p>\r\n

\u30fbTEPCO. \u201c1. Overview of the Accident at the Fukushima Daiichi Nuclear Power Station.\u201d https:\/\/www.tepco.co.jp\/nu\/fukushima-np\/review\/review1_1-j.html<\/a>(Ref. 2024-10-01).\r\n <\/p>\r\n

\u30fbJapan Nuclear Culture Foundation. \u201cIllustrated Collection of Nuclear & Energy | EneHyakka | You, the Future, and Us.\u201dhttps:\/\/www.ene100.jp\/fukushima\/487<\/a>(Ref. 2024-10-01).<\/p>\r\n

\u30fbFukushima Prefectural Government. \u201cTransition in the Number of Evacuees.\u201dhttps:\/\/www.pref.fukushima.lg.jp\/site\/portal\/hinansya.html<\/a>(Ref. 2024-10-01).<\/p>\r\n \r\n <\/div>\r\n <\/div>\r\n<\/main>","protected":false},"excerpt":{"rendered":"This nuclear power plant accident was caused by the Great East Japan Earthquake (magnitude 9.0) and the result […]","protected":false},"author":1,"featured_media":0,"parent":8044,"menu_order":42,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"page_category":[],"class_list":["post-7810","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/pages\/7810","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/comments?post=7810"}],"version-history":[{"count":13,"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/pages\/7810\/revisions"}],"predecessor-version":[{"id":8816,"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/pages\/7810\/revisions\/8816"}],"up":[{"embeddable":true,"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/pages\/8044"}],"wp:attachment":[{"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/media?parent=7810"}],"wp:term":[{"taxonomy":"page_category","embeddable":true,"href":"https:\/\/www.envraddb.go.jp\/en\/wp-json\/wp\/v2\/page_category?post=7810"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}