Environmental release trends
The chart tracks the change in the three types of releases into the sea from La Hague, shown against the change in plant output (in tonnes reprocessed) since 1976. Releases are expressed as percentages of the authorised limits. These limits vary considerably, and are particularly stringent for more toxic waste: 1.7 TBq per year for alpha emitters: 1,700 TBq/year for beta releases other than tritium; 37,000 TBq/year for tritium. The chart clearly shows how releases of alpha- and beta-emitting radioelements have fallen dramatically despite the production ramp-up. Tritium releases, which are difficult to trap but not highly radiotoxic, broadly kept pace with production.