Hokkaido Electric Power Co., one of the smallest utilities
in Japan, said it had begun to shut the 579 megawatt Tomari No.1
nuclear power generation unit on Wednesday evening after
unspecified problems were found which resulted in its breaking
operational rules. The company is investigating the cause of the problem, a
spokesman said. It did not know when the unit would be
restarted.
It was not clear if the company will boost fuel purchases to
make up for the nuclear unit closure.
Japan relies on nuclear energy for about a third of its
energy needs. The operating safety and credibility of the
industry has been in the spotlight in recent years.
After a government-led investigation earlier this year, many
of Japan's 10 nuclear power plant operators admitted they had
modified safety data in the past, including covering up
unintended start-ups of reactors.
In July Tokyo Electric Power Co. was forced to close all
units at its Kashiwazaki-Kariwa plant after an earthquake.
The largest nuclear power plant on the earth is closed
indefinitely for safety reasons. Tokyo Electric has boosted
consumption of oil as a result.