LOS ANGELES, Calif. - Federal regulators have indefinitely delayed a decision on the proposed restart of the shuttered San Onofre nuclear power plant in California, raising new questions Monday about whether the twin reactors will produce electricity again. The seaside plant between San Diego and Los Angeles has been dark since January 2012, after a small radiation leak led to the discovery of unusual damage to hundreds of tubes that carry radioactive water.

Japan is considering resuming talks with India on bilateral cooperation in nuclear energy development, the top government spokesman said Monday. "We have judged it sensible to negotiate an accord with India on nuclear cooperation," Chief Cabinet Secretary Yoshihide Suga told reporters. Prime Minister Shinzo Abe is expected to promote Japanese exports of nuclear power plants to India under such an accord, when he meets with Prime Minister Manmohan Singh on May 29 in Tokyo, sources close to the matter said.

US investment banking giant Goldman Sachs said Monday it will start investing in Japanese renewable energy projects, with a reported $2.9 billion outlay over the next five years. The injection comes after Japan's government stepped into the green power market to set minimum prices in a bid to encourage the sector as the country seeks to rebalance its post-Fukushima energy mix. A wholly owned unit in Tokyo said it will invest in a solar power generation project in Ibaraki prefecture on the outskirts of Tokyo, which is due to start operation in January 2015.

A possible solution to the increasing amount of contaminated water inside the crisis-hit Fukushima Daiichi nuclear power plant could be to pump groundwater into the sea before it gets into the reactor buildings, as planned by the plant operator, the head of international inspectors has said.