It is responsible for the decommissioning of several first-generation nuclear power generation and research sites across the UK, and the operation of a hydro-electric plant.

[1] NRS was created as part of re-structuring of the NDA Estate, which saw Dounreay join with Magnox Ltd in April 2023.

[1][2] In the future, NRS is expecting to assume control of decommissioning of seven Advanced Gas-cooled Reactor sites (AGRs), currently managed by EDF Energy.

Magnox South Ltdbecame and operator of Berkeley, Bradwell, Dungeness, Hinkley Point A and Sizewell A.

In 2017, the NDA decided to terminate the contract with Cavendish Fluor Partnership believing a simplified approach would provide a more efficient decommissioning programme.

The 12 sites were located at Berkeley, Bradwell, Chapelcross, Dungeness A, Hinkley Point A, Hunterston A, Oldbury, Sizewell A, Trawsfynydd, Wylfa, Harwell and Winfrith.

DSRL was formed in 2008, and from 2012 onwards was owned by a consortium of Parent Body Organisation (PBO) companies led by Babcock.