Office for Nuclear Regulation

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Compliance with LC 22 for the Fellside Boiler Park and Steam Generation Plant projects

Executive summary

Purpose of Intervention

The Office for Nuclear Regulation (ONR) undertakes all regulatory interactions with Sellafield Limited (SL), the site licensee, against a strategy defined by the ONR Sellafield, Decommissioning, Fuel and Waste (SDFW) Division. The planned inspection schedule for the current regulatory year (covering April 2017 - March 2018), the content of which is guided by that strategy, identifies the Licence Conditions (LCs) that will be inspected over this period.

This planned inspection was undertaken to determine if SL's Fellside Boiler Park and Steam Generation Plant projects are adequately implementing the licensee's site-wide arrangements for compliance with Licence Condition 22 (Modification or experiment on existing plant). The Fellside Boiler Park and Steam Generation Plant once operational will have an important role in the supply of process steam to a number of Sellafield site-wide operating facilities, including its high hazard and risk reduction work. Steam has an important safety function on the Sellafield site as it is used to transfer radioactive liquids via steam ejectors, as well as being used for heating and evaporation functions.

The overall adequacy of SL's site-wide LC 22 arrangements is considered separately in other ONR inspections.

Interventions Carried Out by ONR

LC 22 requires the licensee to make and implement adequate arrangements to control any modification or experiment carried out on any part of the existing plant or processes which affect safety.

My inspection, which comprised discussions with staff, examination of plant documentation, and inspection of the plant equipment, focussed on SL's arrangements to:

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable; this was not a safety system based inspection.

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

There were no significant findings identified during my inspection. The licensee demonstrated an adequate understanding of its site-wide arrangements. Overall, I consider that the licensee has adequately implemented its arrangements for compliance with LC 22 for the Fellside Boiler Park, and Steam Generation Plant projects. However, I consider it proportionate to raise a Regulatory Issue requiring confirmation that SL has validated that the plant will meet its design intent prior to transition to operations.

For these reasons, on balance I consider an inspection rating of Green (No formal action) is merited against LC 22 as a result of this inspection.

Conclusion of Intervention

My findings were shared with and accepted by the licensee as part of normal inspection feedback. I have raised a Level 4 Regulatory Issue requiring confirmation that SL has validated that the plant will meet its design intent prior to transition to operations.