Office for Nuclear Regulation

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Sellafield - Ionising Radiations Regulations 1999 (IRR99) Inspection of Magnox Swarf Storage Silo

This intervention was carried out under old site licence 31G - 103 came into effect 1 April 2017.

Executive summary

Purpose of intervention

This report presents the findings of a planned intervention that was undertaken at the Sellafield nuclear licensed site in order to assess Sellafield Limited’s (SL) compliance with the Ionising Radiations Regulations 1999 (IRR99) within the Magnox Swarf Storage Silo (MSSS) facility. The intervention was part of ONR’s 2016-2017 planned programme of inspections of the Legacy Ponds and Silos area within Sellafield Limited’s Decommissioning Division defined in ONR’s PP5 Inspection Plan.

Interventions Carried Out by ONR

The intervention consisted of: an examination of arrangements for restriction of exposure, designation of areas, dealing with contingencies and training of personnel; and inspection of controlled areas within MSSS including the control of radioactive sealed sources within the plant’s radioactive source store.  I also examined a range of documentation, including local rules, risk assessments and operator instructions, and reviewed arrangements relating to the classification of areas and the monitoring and control of radiation doses accrued by Sellafield Limited workers and contractor personnel.

IRR99 is primarily concerned with ensuring that work with ionising radiations is conducted safely.  I assessed the adequacy of SL’s arrangements for the control of work with ionising radiations, focussing on compliance within MSSS with the following aspects of IRR99:

Explanation of Judgement if Safety System Not Judged to be Adequate

N/A.  This intervention did not include a safety system inspection.

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

Based on the work areas and work activities examined, I found that arrangements for the control of work with ionising radiations within the Magnox Swarf Storage Silo were adequate.  In particular:

Conclusion of Intervention

From what I observed and examined during the course of the inspection, SL’s arrangements for the control of work with ionising radiations and their implementation indicate that there are no shortfalls of compliance with IRR99 within MSSS. Consequently, I have rated the intervention as Green (No formal action).