Liquid and gaseous low level radioactive waste

Low level liquid effluent (LLLE) and gaseous low level waste are dis­charged from nuclear installations in Scotland into the environment within volumetric and radioactivity limits which are specified in authorisations that are granted by SEPA. The site operators are required to manage discharges to be as low as reasonably practicable (ALARP). They are required to produce implementation control documents that demonstrate best practi­cable means (BPM) and best available technology (BAT). SEPA regulates the site operators against both the authorisations and the implementation control documents. SEPA’s policy is to encourage nuclear site operators to drive down liquid and gaseous discharges to the absolute minimum. In some cases this involves transferring the radioactivity from liquid and gaseous effluents to a solid medium to create a disposable LLW.

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