Office for Nuclear Regulation

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Hartlepool Power Station -  Planned Compliance Inspections

Executive summary

Purpose of intervention

The purpose of this intervention was to undertake compliance inspection activities at EDF Energy Nuclear Generation Limited’s (EDF NGL’s) Hartlepool power station in line with the ONR’s planned inspection programme contained in the Hartlepool Integrated Intervention Strategy (IIS) for 2015/16.

Interventions Carried Out by ONR

I performed a system based inspection to confirm the implementation of safety claims made against the station’s heating and ventilation plant. This compliance inspection was undertaken with EDF NGL’s Independent Nuclear Assurance (INA). During this intervention I examined the licence’s compliance with the following licence conditions (LCs):

Together with inspectors from the Environment Agency and the Health and Safety Executive’s Hazardous Industries Directorate, I inspected EDF NGL’s arrangements for managing the competency of those people performing duties which may affect safety. During this intervention I examined the licensee’s compliance with the following licence conditions (LCs):

Explanation of Judgement if Safety System Not Judged to be Adequate

The heating and ventilation system was judged to adequately meet the requirements of the facility’s safety case.

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

From an LC10 perspective, I sampled records to confirm that contractors undertaking maintenance on the heating and ventilation system had received suitable training for these operations, warranting an IIS rating of 3 (adequate).

From an LC23 and LC24 perspective, based on the evidence sampled during this inspection, the claims presented within safety case were appropriately implemented into the station’s technical specifications, commentaries and operating instructions. I reviewed the status of a sample recommendations associated with heating and ventilation arising from the station’s second periodic review of safety. EDF NGL provided documentation and records to demonstrate closure. I judged the LC23 and LC24 element of this inspection to be adequate, warranting an IIS rating 3 (adequate).

Based on the evidence sampled during this inspection, I found that EDF NGL’s list of essential systems included appropriate elements of the heating and ventilation plant.  The list is used by duly authorised persons to maintain compliance. I considered the arrangements for LC27 to have been adequately implemented, warranting an IIS rating of 3 (adequate).

From an LC28 perspective, the walk down of a portion of the heating and ventilation system identified some degraded conditions. I also identified an anomaly in the planned testing regime for the system. EDF NGL accepted this observation and have agreed to review their existing provision. I judge that an IIS rating of 4 (below standard) is warranted. I have raised an ONR issue to track resolution of this finding.

From an LC34 perspective, I sampled the test regime for the stations active extract filters. EDF NGL demonstrated that these filters are subject to periodic efficiency testing in accordance with relevant standards. I judge that an IIS rating of 3 (adequate) is appropriate.

I examined EDF NGL’s training programme provided for mechanical technicians performing maintenance activities on the station’s gas turbines. I confirmed that the station’s mechanical technicians are provided with a broad range of training and monitored plant experience.  I  am satisfied that this covers the competences required to perform planned maintenance tasks on the gas turbines. I judge that the following IIS ratings are appropriate: LC10 – 2 (above standard) LC12 – 3 (adequate).

This intervention was performed in line with ONR’s guidance requirements in the areas inspected.

Conclusion of Intervention

There are no findings from this inspection that could significantly undermine nuclear safety and no change is necessary to the planned interventions and inspections at Hartlepool as a result. I have raised an ONR issue to manage my findings in relation to testing of the heating and ventilation system.