Office for Nuclear Regulation

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PSR2 Safety Management

Executive summary

Purpose of intervention

This intervention was carried out as part of ONR's project to assess Sizewell B's Periodic Safety Review (PSR2). The purpose of the visit was to gain further insight into the development structure and content of the 'Safety Management Systems' section and to asses how observations identified in the review are being taken forward.

Interventions Carried Out by ONR

Licence Condition (LC) 15 requires the licensee to make and implement adequate arrangements for the periodic and systematic review and reassessment of safety cases.

This intervention comprised of a series of meetings to discuss aspects of Sizewell B's periodic safety review, from the specialist perspectives of Leadership and Management for Safety (LMfS), Management Systems (MS) and Human Factors (HF). The intervention was performed in line with ONR's guidance requirements and technical assessment guides.

ONR's HF specialist completed a walk through of a sample of on-plant operator tasks described in the safety case and visited the Main Control Room (MCR) simulator to obtain a better understanding of how operational personnel detect, diagnose and respond to fault scenarios.

Key Findings, Inspector's Opinions and Reasons for Judgements Made

ONR's assessors were able to gain a better understanding of how the PSR has been conducted, how gaps to relevant good practice were identified and how plans are being developed to address the observations made.

We considered that the Station has a sound understanding of what needs to be done, also that satisfactory progress is being made, and that there is a clear commitment to build on the work done so far.

We were satisfied with the approach being taken to close out the High Priority Observations (whilst recognising that some of the detailed proposals have still to be developed) and that related Low Priority Observations are being addressed under normal business processes.

No issues or PSR2 findings were raised during this intervention.

Conclusion of Intervention

We were satisfied with the information presented by the Station on their approach to the 'Safety Management Systems' section of PSR2, and the progress to date reported against observations identified in the review.