Executive summary
Date(s) of inspection:
- November 2023
Aim of inspection
The CNI attention level for 'safety case adequacy and currency' is Enhanced, the aim of the inspection is to gather evidence on the effectiveness, use, and understanding of SL's new safety case production processes to support a review of the attention level.
Subject(s) of inspection
- LC 14 - Safety documentation - Rating: Green
Key findings, inspector's opinions and reasons for judgement made
I undertook an LC14 inspection of a safety case whilst it was being developed in order to look at the application and understanding of SL's revised safety case processes. The safety case sampled was the upcoming Pressurised Package Facility (PPF) safety case.
Given there have been 2 previous inspections of this type looking at other safety cases in production, this inspection was more limited in scope and focussed on potential areas for improvement that had been observed in the previous inspections; these were:
- documentation of option selection process and justification
- documentation of safety case development history and strategy
- interactions and implications of the safety case on the existing case.
I found that the safety case team had applied the revised processes in the spirit in which they were intended. The team were knowledgeable of the requirements of the process and had met the requirements and expectations of the processes.
The outcomes and evidence from these inspections will be discussed at the forthcoming safety case L4 meeting. There were no new regulatory issues arising from this inspection, but it will provide evidence towards RI-11251.
I judged that the inspection rating was green.
Conclusion
In my view the safety case team had applied the revised processes in the spirit in which they were intended. The team were knowledgeable of the requirements of the process and had met the requirements and expectations of the processes. I judged that the inspection rating was green.