The Nuclear Regulation Authority said Thursday it will investigate geologic faults existing at Tokyo Electric Power Co.'s Kashiwazaki-Kariwa plant as part of the safety assessment process for two reactors there.
The investigation will be conducted because the data submitted by Tepco is "insufficient," an official of the NRA secretariat told reporters after regulators held a second safety screening session on the plant's reactors 6 and 7.
Clearing doubts over possible movements of faults at the plant site is essential for Tepco to bring the two idled units back online.