Office for Nuclear Regulation

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Intervention on Control of Occupational Radiation Exposure – IRR99 Regulation 8

Executive summary

Purpose of intervention

This was a planned intervention at Sizewell A, to assess compliance with Regulation 8 of the Ionising Radiations Regulations 1999.

Interventions Carried Out by ONR

The intervention was undertaken as part of ONR’s Control of Occupational Radiation Exposure (CORE) project, which assesses compliance with Regulation 8 of IRR99, which is concerned with the restriction of exposure to ionising radiations so far as is reasonably practicable (SFAIRP).

The standard CORE questionnaire was submitted to, and completed by, the Licensee prior to the site visit.  We then discussed the adequacy of the arrangements described in the response with the Licensee and conducted a plant visit to determine whether these arrangements were being effectively applied at the point of work.

An overall rating for the adequacy of the arrangements is presented within this intervention record, and a more detailed set of ratings for each of the CORE criterion will be presented in a separate CORE assessment report.

Explanation of Judgement if Safety System Not Judged to be Adequate

This intervention did not include a safety system inspection.

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

The Licensee provided its response to the CORE questionnaire prior to the site visit which we reviewed and discussed with the Licensee upon arrival.  We explored the arrangements for restricting worker exposure to ionising radiation at Sizewell A and were provided with sufficient supporting evidence to gain assurance that the arrangements complied with the requirements of Regulation 8 of IRR99.  Our plant visit confirmed that the Site is broadly applying its arrangements at the point of work.

We were satisfied that the Licensee is broadly complying with its duties under Regulation 8 but identified several matters that should be considered by the Site for further improving its arrangements.  These included organising an ALARP Committee which should be made up of personnel from all levels in the organisation and which should focus on maintaining and improving the effectiveness of the Station’s arrangements for restricting doses SFAIRP.  Furthermore, the organisation of training, specifically regarding refresher training, was also identified as an area for improvement, with evidence of some mandatory training courses having lapsed for several personnel undertaking work with ionising radiation. The Licensee has agreed to undertake a review of training requirements and to ensure that refresher training is delivered as required.

Conclusion of Intervention

The licensee provided evidence that it is broadly compliant with Regulation 8 of the Ionising Radiation Regulations 1999 to restrict operational exposure SFAIRP, hence the overall rating of adequate.