{"id":6788,"date":"2023-11-16T16:21:44","date_gmt":"2023-11-16T07:21:44","guid":{"rendered":"https:\/\/www.jaif.or.jp\/en\/?p=6788"},"modified":"2023-11-16T16:43:00","modified_gmt":"2023-11-16T07:43:00","slug":"nra-approves-extending-operating-lifetimes-of-sendai-1-and-2","status":"publish","type":"post","link":"https:\/\/www.jaif.or.jp\/en\/news\/6788","title":{"rendered":"NRA Approves Extending Operating Lifetimes of Sendai-1 and -2"},"content":{"rendered":"

Accordingly, in October 2021, Kyushu Electric began special inspections to ascertain the soundness of the reactor vessels and other facilities at Sendai-1 and -2, and filed applications with the NRA in October 2022 for permission to extend their operating lifetimes by 20 years.<\/p>\n

At a regular meeting on November 1, the NRA\u2019s Secretariat explained the examination results. Six items were specified as possible areas of major physical degradation, to be evaluated in an aging examination:<\/p>\n

    \n
  1. low cycle fatigue<\/li>\n
  2. neutron irradiation embrittlement of the reactor vessel<\/li>\n
  3. Irradiation-induced stress corrosion cracking<\/li>\n
  4. thermal aging of duplex stainless steel<\/li>\n
  5. deterioration of cable insulation<\/li>\n
  6. loss of strength of concrete structures<\/li>\n<\/ol>\n

    The results of the special inspections were evaluated, and it was then determined that conditions would remain compliant with standards during the period that operations would be extended.<\/p>\n

    After the enforcement of Japan\u2019s New Regulatory Requirements for Commercial Nuclear Power Reactors in July 2013, Sendai-1 and -2 were the first to be restarted, in 2015. Operated continually at rated thermal output, they have performed well, with capacity factors reaching 107% during the winter months.<\/p>\n

    Six domestic NPPs in Japan have now been approved for operation beyond 40 years: Mihama-3 and Takahama-1 and -2, all owned and operated by the Kansai Electric Power Co. (Kansai EP)\u2014all of which have been restarted\u2014and the Tokai-2, owned and operated by the Japan Atomic Power Company (JAPC), along with the two Sendai units.<\/p>\n

    After the bundle of bills amending Japan\u2019s energy-related laws\u2014including the Electricity Business Law, which aims at creating an electricity supply system leading to the realization of a decarbonized society (the GX Decarbonization Power Supply Bill), and which the Diet passed on May 31, 2023\u2014comes into force in June 2025, a nuclear operator will be required to make a technical evaluation of reactor deterioration at the 30th year of operation and every ten years thereafter, and issue a long-term facility management plan.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Accordingly, in October 2021, Kyushu Electric began special inspections to ascertain the soundness of the reactor vessels and other facilities at Sendai-1 and -2, and filed applications with the NRA in October 2022 for permission to extend their operating lifetimes by 20 years. At a regular meeting on November 1, the NRA\u2019s Secretariat explained the […]<\/p>\n","protected":false},"author":14,"featured_media":6789,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1,6,7],"tags":[595,1010,19,1009,271,286],"class_list":["post-6788","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-npps","category-regulation-safety","tag-kansai-ep","tag-kyushu-electric-power-co","tag-nra","tag-operating-lifetimes","tag-sendai-1","tag-sendai-2"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.jaif.or.jp\/en\/wp-json\/wp\/v2\/posts\/6788","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jaif.or.jp\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jaif.or.jp\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jaif.or.jp\/en\/wp-json\/wp\/v2\/users\/14"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jaif.or.jp\/en\/wp-json\/wp\/v2\/comments?post=6788"}],"version-history":[{"count":1,"href":"https:\/\/www.jaif.or.jp\/en\/wp-json\/wp\/v2\/posts\/6788\/revisions"}],"predecessor-version":[{"id":6790,"href":"https:\/\/www.jaif.or.jp\/en\/wp-json\/wp\/v2\/posts\/6788\/revisions\/6790"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jaif.or.jp\/en\/wp-json\/wp\/v2\/media\/6789"}],"wp:attachment":[{"href":"https:\/\/www.jaif.or.jp\/en\/wp-json\/wp\/v2\/media?parent=6788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jaif.or.jp\/en\/wp-json\/wp\/v2\/categories?post=6788"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jaif.or.jp\/en\/wp-json\/wp\/v2\/tags?post=6788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}