| Site | Plutonium kg (1) |
HEU kg 235U (2) |
LEU tU (3) |
Natural U tU (3) |
Depleted U tU (3) |
|---|---|---|---|---|---|
| Dounreay | -0.006 | +0.167 | +0.001 | NIL | -0.001 |
| Harwell | +0.004 | +0.004 | NIL | NIL | NIL |
| Windscale (4) | -0.423 | NIL | NIL | NIL | -0.156 |
| Winfrith | NIL | NIL | NIL | NIL | NIL |
| Sellafield | -38.172 | <+0.001 | +1.086 | <+0.001 | -7.915 |
| Springfields | NIL | NIL | -1.332 | +0.928 | -0.851 |
| Capenhurst Nuclear Services | NIL | NIL | N/A | N/A | N/A |
| URENCO Capenhurst (5) |
N/A | N/A | <------------- -0.311 ----------> | ||
Whenever nuclear material is measured, there is an uncertainty associated with the measurement. The major source of inventory differences has been the uncertainties associated with making multiple measurements of nuclear material during complex processes such as enrichment, fuel fabrication and reprocessing. These figures show no evidence of a leak, diversion or theft of nuclear material.
+ apparent increase
- apparent decrease
- the figures for plutonium are the total amount of all plutonium isotopes.
- the figures for highly enriched uranium (HEU) are for the uranium 235 content of uranium enriched to above 20% of that isotope.
- low enriched uranium (LEU), natural uranium and depleted uranium cannot be used to make explosive devices. The published figures include these grades for the sake of completeness.
- for which Sellafield Ltd became the site licensee on 1 April 2008
- the figure for Urenco Capenhurst is a consolidated figure for Urenco UK Ltd, Enrichment Technology UK Ltd and Capenhurst Nuclear Services
Site contacts
- Dounreay Sites Restoration Ltd (Dounreay), Tina Wrighton - 01847 806086
- Research Sites Restoration Ltd (Harwell & Winfrith), Angela Vincent - 01235 435234
- Sellafield Ltd (Sellafield Ltd), Matt Legg - 019467 83566
- Springfields Fuels Ltd, Alan Beauchamp - 01772 762841
- Capenhurst site (including Capenhurst Nuclear Services Ltd), Neil Fagan - 0151 473 4240