The company said NRC approval was the last regulatory requirement for completing the merger.

EnergySolutions anticipates to complete the merger on or about 24 May 2013 and delist its stock from the New York Stock Exchange.

In April 2013, EnergySolutions revealed that stockholders approved the merger agreement with affiliates of Energy Capital Partners.

After completion of the merger, EnergySolutions’ stockholders will receive $4.15 per share in cash.

Headquartered in Salt Lake City, Utah, EnergySolutions offers a range of services and solutions, including nuclear operations, characterization, decommissioning, decontamination, site closure, transportation and nuclear materials management.

The company operates and provides nuclear decommissioning services for 22 nuclear power plants in the UK.