Back to 2006 listChubu Electric Submits Seismic Safety Assessment Plan for Hamaoka Nuclear Power Station Reflecting New Seismic Durability Guidelines
October 18, 2006
Chubu Electric Power Co., Inc.
Japan's Nuclear Safety Commission revised its Seismic Design Evaluation Guideline for Nuclear Power Reactor Facilities on September 19, 2006. In response, the Nuclear and Industrial Safety Agency issued instructions to Chubu Electric the following day to assess the seismic safety of Hamaoka Nuclear Power Station in light of the revised seismic durability guidelines (below, the new seismic durability guidelines) and separately assess "residual risk"* as information to contribute to a study on implementing future probabilistic safety assessment (PSA) safety regulations. The agency asked that we then report the results to the agency.
Based on these instructions, in preparation for performing the seismic safety assessment in light of the new seismic durability guidelines, Chubu Electric drew up an assessment plan indicating specifically what facilities were subject to assessment, when they would be assessed, and other details, and submitted this plan today to the Nuclear and Industrial Safety Agency.
We have furthermore decided to report on "residual risk" following the agency's instructions separate from and subsequent to reporting on our seismic safety assessment.
Attachment:Overview of Seismic Safety Assessment Plan for Hamaoka Nuclear Power Station
*According to the new seismic durability guidelines, "residual risk" is defined as "the risk that ground motion exceeding the decided ground motion will have an impact on facilities and result in major damage to the facilities or the spread of large amounts of radioactive materials from the facilities, or that as a result of these the adjacent public will be harmed by radioactive exposure."
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