Japanese nuclear regulators say the cooling system has failed for a storage pool for fuel at one of the reactors at the tsunami-damaged nuclear plant in the northeast, according to The Associated Press.

There was no immediate danger from the failure, the second at the plant in a month.

A spokesman for the Nuclear Regulation Authority says an alarm went off Friday, April 5 afternoon about the problem at reactor No. 3. The cause is still under investigation.

A spokesman for the plant's operator said the cooling system can be turned off for two weeks before temperatures approach dangerous levels.

Fukushima Daiichi plant went into multiple meltdowns after the March 2011 tsunami. The plant is being decommissioned, but continues to have glitches.

Last month, a power outage led to a cooling system not working for two days.