HMNB Devonport

Future arisings of submarine decommissioning wastes assume a continuing naval nuclear propulsion programme with a fleet of up to 7 SSNs (nuclear powered, conventionally armed submarines) and 4 SSBNs (nuclear powered submarines with ballistic nuclear weapons). Submarines are assumed to have a hull life of between 25 and 30 years and to be stored afloat for 30 years before being dismantled and the waste processed. Future arisings of submarine decommissioning wastes are forecast up to 2110.

On this page

Information is presented about wastes that existed at HMNB Devonport at the stock date (1 April 2022) and were forecast to arise after this date.

Waste Inventory Data for HMNB Devonport

For background information about this site owner, please refer to the Site Information Sheets in the 2022 UK Radioactive Waste Inventory report.

The following page presents information about radioactive wastes at the specific site selected.

Information about spent fuel and nuclear materials is presented separately in the relevant 2022 Inventory report. For official figures and essential information about how the data has been produced, always refer to the UKRWI 2022 published reports.

View all 2022 waste stream data sheets for HMNB Devonport

Waste groupings

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Activated metals
Activated other materials
Asbestos & other insulation materials
Concrete & rubble
Conditioned
Contaminated metals
Contaminated other materials
Desiccant & catalysts
Flocs
Fuel cladding & miscellaneous wastes
Fuel element debris
Fuels & uranium residues
Graphite
High level waste
Inorganic ion exchange materials
Miscellaneous contaminated materials
Mixed wastes
Oils & other fluids
Organic ion exchange materials
Plutonium contaminated materials
Raffinate
Sludges
Soil
Uranium & thorium contaminated material
Total
stored
waste
Future
arising
waste
Lifetime
packaged
waste

Waste categories

Showing results for data originating from HMNB Devonport.

Waste category Volume (m3)
Reported at 1 April 2022 Estimated future arisings Lifetime Total
HLW 0 0 0
ILW 19 -7 11
LLW 58 406 465
VLLW 0 0 0
Total 77 399 476
Waste category Volume (m3)
Reported at 1 April 2022 Estimated future arisings Lifetime Total
HLW 0 0 0
ILW 10 13 22
LLW 30 620 650
VLLW 0 0 0
Total 39 633 672
Waste category Volume (m3)
Reported at 1 April 2022 Estimated future arisings Lifetime Total
HLW 0 0 0
ILW 12 16 27
LLW 31 646 677
VLLW 0 0 0
Total 43 662 704

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From 1 April 2022 there is a net decrease in the volume of HLW because accumulated highly active liquor is being conditioned, which reduces its volume by about two-thirds, and also because vitrified HLW is being exported to overseas customers.

Forecast waste arisings

Location

Site Owner

Ministry of Defence