Nuclear facility operator Magnox intends to cut its workforce across 12 nuclear power stations by September 2016.
The firm is controlled by Cavendish Nuclear and its US partner Fluor, and operates under a contract for the Nuclear Decommissioning Authority.
The proposed reductions are part of its restructuring efforts and are expected to reduce the number of staff by 1,400-1,600.
As well as staff, this restructuring is also going to affect Magnox’s agency and contract resources.
The job cuts are being done as it plans scale down in the work programme at its multiple sites and to implement a streamlined operating model for decommissioning.
Eleven of the nuclear facilities have already been shut down by the Cavendish Fluor partnership.
Only one operational project, Wylfa on Anglesey in North Wales, is expected to be decommissioned by the end of the year, reports The Guardian.
NDA has been assured that the firm will try to mitigate the impact through efforts on re-training and relocating in its parent companies.
The Cavendish Fluor Partnership had won the NDA contract for managing the 12 Magnox nuclear sites in September 2014.
The nuclear projects that fall under the list include UK power stations in Berkeley, Gloucestershire, Bradwell, Essex, and Hinkley Point A in Somerset.