Accurate response to seam problems in Shika Nuclear Power Station site

Northwest wall of former trench B (northwest area of S-1) For evaluation of the seams in the site of Shika Nuclear Power Station of Hokuriku Electric Power Company, discussions have been made at the knowledgeable persons meeting of the Nuclear Regulation Authority (NRA) for more than two years since February 2014. In April 2016, the evaluation document was submitted by the knowledgeable persons meeting and NRA received it.
 The evaluation document mentions that "the evaluation this time is conducted based on the limited materials and data. Thus, since more data are needed for more accurate and assured evaluation," six items of "future challenges" are presented (see page 5).
 The safety of Shika Nuclear Power Station will be reviewed anew at the stage of review on conformity to the new regulatory standards with reference to this evaluation document.
 Hokuriku Electric Power Company provides careful explanation on geological data and others in the review, which obtained from additional survey and investigation, in addition to the survey result to date. Moreover, we also think the validity of our evaluation that "the seams are not faults that may be active in the future" will be acceptable by properly addressing the "future challenges" noted in the evaluation document in the review process of NRA.


Development to date of seam problems in the site

Development to date of seam problems in the site

Content and result of survey by Hokuriku Electric Power Company

Content and result of survey by Hokuriku Electric Power Company

"Future challenges" and responsive measures

 The evaluation document mentions that "the evaluation this time is conducted based on the limited materials and data. Thus, since more data are needed for more accurate and assured evaluation," six items of "future challenges" are presented.

"Future challenges" mentioned in evaluation document / Gist of "future challenges"

Efforts for Early Restart and Safe and Stable Operation of Shika Nuclear Power Station

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