Federal authorities are investigating a factory that supplies parts to nuclear power plants under construction in the Southeast over allegations that employees broke quality control rules and falsified records.

The U.S. Nuclear Regulatory Commission sent a subpoena in November to The Shaw Group Inc. seeking documents related to a potential violation. The existence of the probe was later made public in legal filings.

The allegations focus on a factory in Lake Charles, La., that manufactures large components for two nuclear plants now under construction, Plant Vogtle in Georgia and Plant Summer in South Carolina.

CB&I, which acquired The Shaw Group in February, said it has fully cooperated with the government, provided the requested documents and fixed the problems.

Tags: Nuclear Regulatory Commission, Plant Vogtle, The Shaw Group Inc.