For decades, light water reactors have used control rods to regulate the fission reaction that powers a nuclear plant. The rods move vertically in and out of the core and are made of mat. . .

The operators of Calvert Cliffs nuclear power plant in southern Maryland shut down one of its two reactors Thursday after a control rod assembly malfunctioned during testing, federal safety regulators ...

Engineers at the Idaho National Laboratory (INL) have reached a critical milestone in the ...

Tokyo Electric Power Company (Tepco) reported that a control rod cannot be removed from the reactor of unit 7 of its Kashiwazaki Kariwa nuclear power plant. The unit shut down automatically when an ...

— The Salem 2 nuclear reactor returned to service this morning after being shut down since Friday because of issues with one of the control rods, officials said. Salem Unit 2 came back online and ...

LOWER ALLOWAYS CREEK TWP. — Salem Unit 2 was manually taken offline by control room operators at 10:01 a.m. Friday, according to Joe Delmar, spokesman for PSEG Nuclear, after an issue with one of the ...

BUCHANAN, N.Y. (CBSNewYork/AP)-- One of the Indian Point nuclear power plant's reactors was shut down Saturday after several control rods lost power, the plant owner said, marking the latest in a ...

As warmer-than-average waters in Connecticut’s Long Island Sound last week prompted Dominion to shut down one unit at its Millstone Nuclear Plant, an ammonia release caused an evacuation of part of ...

In this historic photo from the U.S. space agency, control rods for Plum Brook's Mock-Up Reactor, which entered the core from above, are shown. In the Plum Brook reactor, the control rods entered from ...

A nuclear reactor on Korea's eastern coast was temporarily shut down Monday due to a problem in one of its control rods, operators said. The reactor unit 1 at Hanwool Nuclear Power Plant in Uljin, 330 ...