This intervention was undertaken to observe a Level 2 emergency exercise at the Submarine Operational Berth at HMNB Portsmouth and Portsmouth City Council offices on 13th October 2016. The exercise formed the final component of a modular approach to testing the Portsmouth Operational Berth off-site emergency plan. ONR were present to observe the exercise as the Enforcing Authority for the Radiation (Emergency Public Preparedness and Public Information Regulations) 2001 (REPPIR). ONR observe these exercises to ensure that they are done every 3 years as required by the regulations, that all of the relevant participants take part and that lessons are learned and the plan and multi-agency arrangements are improved as a result.
The Level 2 exercise intervention was undertaken by the ONR nominated site inspector supported by 2 ONR specialist inspectors and a team of inspectors from the Defence Nuclear Safety Regulator (DNSR). The intervention consisted of site exercise briefs on the afternoon of the 12th October 2016 followed by observation of the exercise on the 13th October 2016.
The exercise provided the opportunity to test the effectiveness of the Operators On-site Emergency Plan and the Off-Site Emergency Plan, in response to a postulated Off Site Nuclear Emergency in a nuclear powered submarine. ONR observers were located at Operational and Tactical locations. At the end of the exercise I collated feedback and observations from ONR and DNSR observers on what went well and on potential areas for improvement and fed this back at the immediate post-exercise debrief meeting confirming that the exercise constituted a test of the plan prepared under Regulation 9(1) of REPPIR and demonstrated in accordance with Regulation 10(1)(b). I also confirmed that ONR inspectors concurred with the DNSR judgement that the exercise was an adequate demonstration of the on-site emergency arrangements.
I was able to confirm that the exercise constituted a test of the plan prepared under Regulation 9(1) of the REPPIR regulations and demonstrated in accordance with Regulation 10(1)(b).
The intervention did not identify any matter impacting on nuclear safety that required immediate regulatory action.