Question to the Ministry of Defence:

To ask the Secretary of State for Defence, how many nuclear safety incidents were recorded in each of the last ten years of operation of the naval reactor test establishment at Dounreay.

In each of the last ten years of operation (from 2006 to 2015), no nuclear safety incidents have been recorded at the nuclear reactor test establishment at Dounreay.

The Ministry of Defence is using the definition of an "incident" as that meeting Level 1 of the International Nuclear and Radiological Event Scale (INRS). The International Atomic Energy Agency established the INRS as an international standard to define the severity of nuclear accidents.