{"id":4016,"date":"2017-11-30T18:22:16","date_gmt":"2017-11-30T09:22:16","guid":{"rendered":"http:\/\/www.cnic.jp\/english\/?p=4016"},"modified":"2017-12-01T12:00:32","modified_gmt":"2017-12-01T03:00:32","slug":"can-tepcos-kashiwazaki-kariwa-units-6-and-7-be-restarted","status":"publish","type":"post","link":"https:\/\/cnic.jp\/english\/?p=4016","title":{"rendered":"Can TEPCO’s Kashiwazaki-Kariwa Units 6 and 7 be Restarted?"},"content":{"rendered":"
Japan\u2019s Nuclear Regulation Authority (NRA) finalized the draft of its inspection documents regarding the Application Form for Approval of Changes to Nuclear Facilities for Tokyo Electric Power Co.\u2019s (TEPCO\u2019s) Kashiwazaki-Kariwa Nuclear Power Station (below, KK) on October 4, and solicited public comments for a 30-day period from October 5 to November 3. According to news reports, 904 comments were received. Since the March 11, 2011 earthquake and tsunami, when all of Japan\u2019s nuclear power plants (NPPs) were shut down, five have been restarted, all of which are pressurized water reactors (PWRs). This will be the first time for the NRA to decide on restarting a boiling water reactor (BWR), which is what TEPCO\u2019s Fukushima Daiichi NPP used. How can the NRA respond to all these views from across Japan?<\/div>\n
\u00a0<\/div>\n
(1) History of Niigata\u2019s NPPs<\/strong>
Niigata is a prefecture known for its frequent earthquakes. In the past half-century alone, it experienced one large and two medium-sized earthquakes. Those were the Niigata earthquake of 1964 (magnitude M7.5), in which considerable liquefaction was noted in urban areas; the Chuetsu earthquake of 2004 (M6.8); and the Chuetsu offshore earthquake of 2007 (M6.8).
\u00a0 Moreover, KK was the world\u2019s first NPP to be hit directly by an earthquake. The Chuetsu offshore earthquake of 2007 resulted in leakage of radioactive substances into the environment, outbreaks of fire and uneven ground at the site, with 3,762 defects resulting.
\u00a0 Built straddling Kashiwazaki City and the adjacent Kariwa Village, the TEPCO-owned KK brought its Unit 1 reactor into operation in September 1985, and Unit 7, in July 1997. The combined capacity of its seven units is 8,200 MW, making it the world\u2019s largest single nuclear generating station. Units 6 and 7, in particular, are \u201cadvanced boiling water reactors (ABWR)\u201d with capacities of 1,356 MW each and recirculation pumps contained within them.
\u00a0 Japan\u2019s largest electric power company TEPCO has owned and operated a total of 17 nuclear reactors in Japan (six at Fukushima Daiichi, four at Fukushima Daini and seven at KK). The electricity generated by these is all transmitted to the Greater Tokyo Area. None is supplied to either of the prefectures where it is produced.
\u00a0 In August 2002, however, it was revealed that TEPCO had altered data from its own inspections, concealing problems in 29 cases. It continued asserting that safety was its \u201ctop priority,\u201d but that was clearly a lie. In September 2002, Niigata Prefecture, Kashiwazaki City and Kariwa Village all rescinded their agreement for \u201cpluthermal\u201d plans at the plant. The following year, in April 2003, operation of all 17 of TEPCO\u2019s nuclear reactors was halted.
\u00a0 Viewing TEPCO\u2019s concealment of problems as a serious issue, Niigata Prefecture established the \u201cTechnical Committee on Nuclear Power Safety Management in Niigata Prefecture\u201d (hereinafter, the \u201cTechnical Committee\u201d) in February 2003 with the aim of increasing the prefecture\u2019s technical ability when checking KK for safety and hazards. Nevertheless, they were unable to prevent the disaster resulting from the Chuetsu offshore earthquake in July 2007. During that earthquake, Units 2, 3, 4 and 7 were running, and they shut down automatically. The other units, 1, 5 and 6, were out of operation for regular inspections.<\/div>\n
\u00a0<\/div>\n
(2) Two Subcommittees<\/strong>
Niigata Prefecture added six new members to the Technical Committee in March 2008 to enhance it, giving it 14 members in all. In addition, it organized two subcommittees under the Technical Committee. They were the \u201cSubcommittee into Equipment Integrity, Earthquake Resistance Safety\u201d (with eight members) and the \u201cSubcommittee into Earthquake and Ground Condition\u201d (with six members). Each subcommittee has several members that take a cautious approach to nuclear power, or are even downright critical of it\u2014a stance worthy of special mention. Indeed, this situation is without parallel.
\u00a0 The effect of this became more notable the more the discussions of the subcommittees proceeded. At the time, the Nuclear and Industrial Safety Agency and the NRA were Japan\u2019s regulatory institutions for nuclear energy, but while they were rather lenient toward TEPCO in their reviews, both subcommittees questioned TEPCO severely, occasionally even getting the national government to amend its decisions. It was also the prefectural government\u2019s policy to have the views of Niigata\u2019s citizens and residents reflected by the Technical Committee and its two subcommittees.
\u00a0 On March 11, 2011, right when the Subcommittee into Earthquake and Ground Condition was convening, wouldn\u2019t you know it, the venue underwent prolonged, major shaking. That was the M9.0 Tohoku earthquake and tsunami off Japan\u2019s Pacific coast.<\/div>\n
\u00a0<\/div>\n
(3) Fukushima Daiichi Nuclear Accident Verification Work<\/strong>
Niigata\u2019s Technical Committee has turned its discussion for the time being to Fukushima nuclear accident verification work. It has augmented its membership and continues these discussions even now. For safe management of KK, it decided that what needed highest priority was clarifying the causes and results of the Fukushima nuclear accident. The four committees investigating the accident, from the Diet, the national government, TEPCO and private citizens, submitted their own respective reports, wrapping up their investigations, but Niigata Prefecture was not satisfied with that, and has been trying to clarify all aspects of the Fukushima nuclear accident.
\u00a0 The two subcommittees are taking a temporary break from their discussions because the Technical Committee has put forward six topics and divided its members into groups of a few people that are continuing to discuss these. The six topics are (1) the effects of seismic motion on important equipment, (2) critical decisions made, such as to inject seawater, (3) TEPCO\u2019s earthquake-response management, (4) the state of information sharing on issues such as the meltdowns, (5) work under high radiation conditions, and (6) severe accident countermeasures. Six and a half years after the earthquake, these discussions are finally shedding light on the course of events that delayed public admission of the meltdowns. The discussion of topic (1) has come to a climax. Facts are being brought to light about damage that the enormous tsunami fails to explain.<\/div>\n
\u00a0<\/div>\n
(4) Newly Elected Governor Yoneyama\u2019s Policies<\/strong>
Ryuichi Yoneyama became Niigata\u2019s newest governor in October 2016, replacing Gov. Izumida, who had served three consecutive terms. Gov. Yoneyama is continuing his predecessor\u2019s policies. He says, \u201cWhile verification of the Fukushima accident is still incomplete, we will not even begin to discuss restarting the Kashiwazaki-Kariwa Nuclear Power Station.\u201d Furthermore, he says verification work for the Fukushima nuclear accident will take another three to four years to complete. What this means is that even if the NRA gives the go-ahead for restarting the plant, Niigata Prefecture, as the locality of the nuclear power plant, will conduct its own deliberations independently of the national government and draw its own conclusions.
\u00a0 In addition, Gov. Yoneyama has conferred the status of \u201cVerification Committee\u201d upon the Technical Committee (which currently has 15 members), whose duty it will be to clarify the causes of the accident. He has also established two new verification committees. They are the \u201cCommittee to Consider the Effects from Nuclear Accidents on Health and Livelihood of a Nuclear Power Plant Accident\u201d (five members in the subcommittee on health and four in the subcommittee on livelihood) and the \u201cCommittee to Consider Evacuation Methods in Nuclear Disasters\u201d (nine members). To oversee all three of the verification committees, a \u201cVerification Supervisory Committee\u201d is to be formed.
\u00a0 While the committee system which has been set up is to be highly commended, it reflects only the view of experts. One wonders what kind of input Niigata\u2019s citizens and residents will be given and how their proactive views and arguments can also be incorporated. I think that is an important question for the future.<\/div>\n
<Yukio Yamaguchi, CNIC Co-Director><\/div>\n","protected":false},"excerpt":{"rendered":"

Japan\u2019s Nuclear Regulation Authority (NRA) finalized the draft of its inspection documents regarding the Application Form for Approval of Changes to Nuclear Facilities for Tokyo Electric Power Co.\u2019s (TEPCO\u2019s) Kashiwazaki-Kariwa Nuclear Power Station (below,...<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[27,36],"tags":[],"class_list":["post-4016","post","type-post","status-publish","format-standard","hentry","category-kk","category-safety"],"acf":[],"_links":{"self":[{"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=\/wp\/v2\/posts\/4016","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4016"}],"version-history":[{"count":3,"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=\/wp\/v2\/posts\/4016\/revisions"}],"predecessor-version":[{"id":4032,"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=\/wp\/v2\/posts\/4016\/revisions\/4032"}],"wp:attachment":[{"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4016"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4016"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cnic.jp\/english\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4016"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}