Sellafield site

Everyday we are making Sellafield cleaner, safer, more productive, more cost effective and a better neighbour

The Sellafield site has been operational since the 1940’s, when it was used as a Royal Ordnance factory supporting the war effort. The site is also home to the world’s first commercial nuclear power station – Calder Hall, which operated successfully from 1956 to 2003.

Today the site comprises of a wide range of nuclear facilities, including redundant facilities associated with early defence work, as well as operating facilities associated with the Magnox reprocessing programme, the Thermal Oxide Reprocessing Plant (Thorp), the Sellafield Mox plant and a range of waste treatment plants.

The diagram below gives an overview of the main facilities on the Sellafield site and a brief outline of their functions. Select a section to learn more about what we do at Sellafield.

Sellafield site activities

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Seperation Area

Separation Area

Legacy Ponds

Legacy Ponds

Legacy Silos

Legacy Silos

Primary Separation Plant

Primary Separation Plant

WAGR

Windscale Advanced Gas-Cooled Reactor (WAGR)

Calder Hall

Calder Hall

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Fuel Handling Plant (FHP)

Fuel Handling Plant (FHP)

Thermal Oxide Reprocessing Plant (Thorp)

Thermal Oxide Reprocessing Plant (Thorp)

Magnox Reprocessing Plant

Magnox Reprocessing Plant

Sellafield Mox Plant

Sellafield Mox Plant

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Evaporators A, B and C

Evaporators A, B and C

Evaporator D

Evaporator D

Windscale Vitrification Plant (WVP)

Windscale Vitrification Plant (WVP)

Effluent & Encapsulation Plant facilities

Effluent & Encapsulation Plant facilities

Solvent Treatment Plant (STP)

Solvent Treatment Plant (STP)

Enhanced Actinide Removal Plant (EARP)

Enhanced Actinide Removal Plant (EARP)

Segregated Effluent Treatment Plant (SETP)

Segregated Effluent Treatment Plant (SETP)

Waste Packaging and Encapsulation Plant (WPEP)

Waste Packaging and Encapsulation Plant (WPEP)

Waste Encapsulation Plant (WEP)

Waste Encapsulation Plant (WEP)

Magnox Encapsulation Plant (MEP)

Magnox Encapsulation Plant (MEP)

Waste Monitoring and Compaction (WAMAC)

Waste Monitoring and Compaction (WAMAC)

Waste Treatment Complex (WTC)

Waste Treatment Complex (WTC)

SIXEP

Site Ion Exchange Effluent Plant (SIXEP)

Sludge Packaging Plant 1 (SPP1)

Sludge Packaging Plant 1 (SPP1)

Separation Area Ventilation (SAV) project

Separation Area Ventilation (SAV) project

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SPRS – Sellafield Product Residues Store

Sellafield Product and Residue Store (SPRS)

Encapsulated Product Stores 1 & 2

Encapsulated Product Stores 1 & 2

Encapsulated Product Store 3 (EPS3)

Encapsulated Product Store 3 (EPS3)

Residue Export Facility (REF)

Residue Export Facility (REF)