Another reactor shut down in Japan

A technical failure has forced the closure of another Japanese nuclear reactor at Ohi power station, 220 miles west of Tokyo.

A spokesman said pressure in a tank containing boric acid water had fallen on Friday night for unknown reasons, according to Reuters. The pressure has reportedly since returned to normal.

Operators at Japan's Kansai Electric Power Company said on Saturday that while no radiation leak had occurred, they would manually close the No. 1 reactor for checks at 9pm local time.

The BBC said that the Ohi closure will leave Japan with just 18 operational reactors out of 54.