Nuclear Submarines: Safety
(asked on 2nd May 2025) - View Source
Question to the Ministry of Defence:
To ask the Secretary of State for Defence, how many nuclear site events there were at (a) Coulport and (b) Faslane in the last 12 months.
The table below shows the number of Nuclear Site Event Reports (NSERs) at Coulport and Faslane recorded between 22 April 2024 to 22 April 2025. These are shown according to agreed categorisation:
Nuclear Site Events- 2024 22/04/2024 - 31/12/2024 | Category A | Category B | Category C | Category D | Below Scale |
Coulport | 0 | 0 | 9 | 25 | 1 |
Faslane | 0 | 3 | 22 | 58 | 36 |
Nuclear Site Events- 2025 01/01/2025 - 22/04/2025 | Category A | Category B | Category C | Category D | Below Scale |
Coulport | 0 | 0 | 4 | 9 | 0 |
Faslane | 1 | 2 | 7 | 13 | 5 |
In line with Industry Good Practice and in common with other defence and civil nuclear sites, His Majesty’s Naval Base Clyde has a well-established system for raising NSERs.
NSERs are raised to foster a robust safety culture that learns from experience, whether that is of equipment failures, human error, procedural failings, documentation shortcomings or near-misses.