Waste at 1 April 2025 includes all radioactive materials that had been declared as waste and were being held at this date.
The table gives the reported waste volumes and corresponding masses at 1 April 2025, and the volumes already packaged at 1 April 2025 with corresponding numbers of packages for each waste category. The tables also give figures for future radioactive waste arisings that are projections made by the organisations operating the sites. These projections are based on assumptions about the nature, scale and timing of future operations and activities at their sites. The 2025 Inventory includes forecast radioactive wastes from future operations and activities up to 2136.
Wastes at 1 April 2025 and future arisings – Reported volumes, masses, equivalent packaged volume and package numbers
| Waste type | At 1.4.2025 |
Reported volume (m3) |
Reported mass (tonnes) |
Packaged volume (m3) |
No of packages |
|
HLW(1) |
Not yet packaged | 1,040 | 1,260 |
– |
– |
|
Already packaged | 917 | 2,430 | 1,200 | 6,114 | |
|
ILW(2) | Not yet packaged | 63,500 | 60,300 |
– |
– |
Already packaged(3) | 36,800 | 66,800 | 52,400 | 71,958 | |
LLW(2) | Not yet packaged | 68,800 | 60,000 |
– |
– |
|
Already packaged | 1,100 | 2,030 | 1,140 | 56 | |
VLLW(4) |
Not yet packaged | 1,610 | 1,430 | – | – |
Already packaged(5) | 0 | 0 | 0 | – |
(1) Volume and mass “not yet packaged” are for highly active liquor; volume and mass “already packaged” are the conditioned volume and corresponding mass for waste that has been encapsulated in glass.
(2) Volume and mass “not yet packaged” are for untreated or partly treated waste. Volume and mass “already packaged” are the conditioned volume and corresponding mass e.g. conditioned in a cement-based material.
(3) ILW package numbers include 1,977 1803-type mild steel drums. These drums are expected to be overpacked in larger capacity boxes (6 drums per box).
(4) Volume and mass “not yet packaged” are for untreated or partly treated waste.
(5) As VLLW can be disposed to appropriately permitted landfill sites no package numbers are collated for this waste category in the inventory.
Find out more about waste quantities in the 2025 UK Radioactive Waste Inventory report.
2025 UK data
Waste in stock
Waste at 1 April 2025 includes all radioactive materials that had been declared as waste and were being held at this date.
Waste forecasts
Estimates of future radioactive waste arisings are projections made by the organisations that operate sites.
Other radioactive wastes and materials
Certain radioactive wastes and materials are reported separately from the main Inventory of radioactive wastes