Thermal Oxide Reprocessing Plant, Sellafield, Lake District, England. Reprocessing plant for oxidic fuel elements with a maximum annual throughput of 1,200 t uranium. Since 1964 a Reprocessing plant for Magnox fuel elements from British reactors has also been in operation at the Sellafield location (formerly Windscale).

On 14 November 2018 it was announced that operations had ended at Thorp. The facility will be used to store spent nuclear fuel until the 2070s.

Plant demolition will take place after a period to allow radiation levels to decline and is expected to occur between 2075 and 2095. The estimated cost of decommissioning is forecast as £4 billion.