Skip to content
Subscriber Only

Japan Nuclear Watchdog Casts Doubt on Tepco Tank Monitoring

Tokyo Electric Power Co.’s inexact monitoring of contaminated water stored at the Fukushima atomic plant may have led the utility to overstate last week’s storage tank leak, according to Japan’s nuclear regulator.

The 300-metric-ton loss reported by the utility known as Tepco was based on an assumption that the tank had been full before the leak, Shunichi Tanaka, chairman of Japan’s Nuclear Regulation Authority, told reporters yesterday in Tokyo. That assumption may not have been reliable, since there was no gauge measuring the individual tank’s water level, he said.