Office for Nuclear Regulation

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Hartlepool (EDF Energy) Pre-Outage Inspection

Executive summary

Purpose of Intervention

Site License Condition 30 requires EDF Energy Nuclear Generation Ltd (NGL) to periodically shutdown each reactors at its nuclear power stations for the purpose of examination, inspection, maintenance and testing of items important to safety in accordance with the requirements of the plant maintenance schedule (Site License Condition 28).

The purpose of this inspection was to provide regulatory confidence in the implementation of the mechanical engineering aspects of the overhaul of two gas circulators and one CO2 pressure relief valve in readiness for their exchange during the forthcoming statutory outage and inform the ONR decision relating to the issue of a Licence Instrument for Consent for return to service, post outage activities at Hartlepool R1 (Trim Ref. 2017/339617).

Interventions Carried Out by ONR

As part of this outage I selected as my sample for inspection the following activities:

My proposed inspection is described in a pre-outage inspection plan (Trim Ref. 2017/455296).

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

I observed two gas circulators and one reactor CO2 pressure relief valve (SRV) nearing completion for reactor exchange during the next statutory outage in January 2018.

I noted that penetrations on the gas circulators, SRV and other equipment in a state of partial assembly were fitted with appropriate foreign material exclusion covers.

As part of the walkdown I conducted I witnessed the testing of a gas circulator pony motor from the control room. As a preliminary to this test I witnessed the utilisation of the test operating instruction, which were observed to be completed in a thorough manner.

I sampled and examined a number of gas circulator and CO2 RPV overhaul task sheets and activity control document arrangements and judged they met my expectations and were of a good quality.

Conclusion of Intervention

After examining the evidence sampled during my inspection I judge that the gas circulators and safety relief valve are appropriately refurbished and are ready for reactor installation during the coming statutory outage to commence in January 2018.

It is my judgement therefore that a rating of Green was appropriate for this inspection.