Office for Nuclear Regulation

Sellafield Limited IRR17 Inspection of The Thermal Oxide Reprocessing Plant (THORP)

Executive summary

Purpose of Intervention

The Office for Nuclear Regulation (ONR) undertakes all regulatory interaction with the Sellafield site licensee (Sellafield Limited (SL)) against a strategy defined by the ONR Sellafield, Decommissioning, Fuel and Waste (SDFW) Division.  This report presents the findings of a planned intervention that was undertaken in order to assess compliance with the Ionising Radiations Regulations 2017 (IRR17) within the Thermal Oxide Reprocessing Plant (THORP) on the Sellafield Site.

Interventions Carried Out by ONR

The intervention consisted of an examination of the implementation of arrangements to secure compliance with the requirements of IRR17 by discussion with key facility personnel and inspection of plant. The key requirements examined were those relating to the following IRR17 regulations:

In addition to the review of arrangements against the above regulations, a review of a small number of recent radiological related events and associated actions was undertaken.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable, this was not a System Based Inspection.

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

The following summarises the key observations arising from discussions, sampled documentation and inspection of the facility during this intervention:

Conclusion of Intervention

In conclusion, I judged that, on the basis of evidence sampled at the time of this inspection, compliance with IRR17 was demonstrated and an inspection rating of Green (no formal action) is appropriate.