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.

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.

Wastes at 1 April 2025 – 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
HLW1	Not yet packaged	1,040	1,260	–	–
	Already packaged	917	2,430	1,200	6,114
ILW2	Not yet packaged	63,500	60,300	–	–
	Already packaged3	36,800	66,800	52,400	71,958
LLW4	Not yet packaged	68,800	60,000	–	–
	Already packaged	1,100	2,030	1,140	56
VLLW5	Not yet packaged	1,610	1,430	–	–
	Already packaged6	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. Volume and mass “already packaged” are the conditioned volume and corresponding mass e.g. conditioned in a cement-based material. ↩︎
5. Volume and mass “not yet packaged” are for untreated or partly treated waste.  ↩︎
6. 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.