The U.N.'s International Atomic Energy Agency (IAEA) said that a review of Japan's Kashiwazaki-Kariwa Nuclear Power Station by an international team of experts recommended more work should continue on safety improvements at the plant, but that many of the recommendations and suggestions made in a 2015 review had been addressed.
The agency said an Operational Safety Review Team (OSART) had conducted a five-day inspection from July 31 through August 4, as a follow up visit to assess progress made since a 2015 OSART mission to Units 6 and 7 at the plant. Follow up visits are generally conducted two years after the initial visit. Units 6 and 7 at the power station are powered by 1356 megawatt advanced boiling water reactors. They have both been shut down for years as part of Japan's reaction to the March 2011 accident at the Fukushima Daiichi Generating Station northeast of Tokyo.
“TEPCO has addressed several issues identified in the 2015 review … Though there has been progress, work is still needed to address some recommendations in order to strengthen the plant's operational safety,” said OSART team leader Peter Tarren, head of the IAEA's Operational Safety Section.
The team found fully implemented recommendations from the previous visit that include update and integration of Emergency Operating Procedures, Standard Operating Procedures and Accident Management Guidance “that extends the scope to cover shutdown operational regimes and the occurrence of an accident in the spent fuel pool under design extension conditions.”
The plant also has improved the current emergency plan “to ensure that it contains all the basic arrangements and concepts of operation for all key emergency response functions.” Those plans have been deemed “comprehensive, clear, consistent, unequivocal and standardized,” the review found.
However, the plant needed further work on “an integrated system to manage all operating experience information and ensure that elements related to reporting, screening, analysis, corrective actions, trending and effectiveness reviews are fully developed and implemented.”
Recommendations also included improvements on plant design data availability and on-shift responses to ensure effective responses to fire alarms.
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