Office for Nuclear Regulation

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Heysham 1 - Planned Compliance Inspection

Executive summary

Purpose of Intervention

This was a planned ONR / Environment Agency joint intervention at the EDF Energy Nuclear Generation Limited (NGL) Heysham 1 Power Station undertaken as part of a series of planned interventions listed within the Heysham 1 Integrated Intervention Strategy 2017/2018.

Interventions Carried Out by ONR

The interventions were carried out by the Heysham 1 Site Inspector with the support of ONR Specialist Inspectors from both the Nuclear Liabilities Regulation (NLR) and Transport specialisms and NLR Nuclear Associate. This was a joint intervention with the Environment Agency.

The ONR Site Inspector and NLR Nuclear Associate conducted a planned inspection against:

The ONR Site Inspector, NLR Specialist Inspector and Nuclear Associate, jointly with the Environment Agency conducted and inspection against:

The Transport Specialist Inspector conducted an inspection against the Carriage of Dangerous Goods and Use of Transportable Pressure Equipment Regulations 2009, as amended 2011 (CDG 2009).

The intervention was performed in line with ONR’s guidance requirements (as described in our technical inspection guides) in the areas inspected.

Explanation of Judgement if Safety System Not Judged to be Adequate

No safety system based inspections were undertaken during this intervention.

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

The LC4 compliance inspection included a sampled inspection of the arrangements in place to maintain accurate records of nuclear matter control onsite, including observation of new fuel receipt, emplacement in store, recording and utilisation of inventory information on the Nuclear Material Accountancy System (NUMAS) and dispatch of empty fuel boxes from the Additional New Fuel Store. A minor shortfall was noted in the key retrieval process for authorised source handlers. While the process met the expectations for compliance, the logistics of identifying approved handlers was unnecessarily onerous on security personal. The licensee agreed and is looking at improving this system.

For compliance with LC5 quality plans for the consignment of nuclear matter, were examined. The process is supported by the ‘Multimodal Dangerous Goods Note Form' Quality Plan. This quality plan was viewed for the shipment of Neutron Flux Detectors and met the expectations for LC5. The licensee demonstrated a clear understanding of the site license boundary and appropriate arrangements for record retention, in line with the expectations of LC5.

LC32 inspection centred on a plant walkdown of; the Decontamination Workshop and Mezzanine storage area and the sort / segregation facilities and associated R2, R3 and R4 storage areas. The ONR specialist inspector noted a number of improvements across the facilities for access, storage, retrievability, identification and hazard reduction. The site continues to progress with these improvements.

An update to an ONR issue was provided regarding the Duplex Dust Sump Exit Filter (DSEF) installation . Due to the success on Reactor 1, and the schedule on Reactor 2, the ONR specialist inspection has judged it would be proportionate to close this regulatory issue.

Sludge management arrangements were sampled. The licensee was unable to provide both; the justification for the limited retrieval volume, and the evidence that the principle of minimisation has applied across the station for sludge arisings. These are minor shortfalls therefore two regulatory issues have been raised to monitor their progress:

For LC34 a plant walkdown of the Active Effluent Treatment Plant (AETP) was conducted. The general condition of the facility was a good. In addition, the leak schedule for radioactive leaks was sampled, an update was provided on previous elevated tritium levels within ground water monitoring and a review of the licensees LC34 compliance self-assessed shortfalls was conducted with satisfactory resolution presented.

For compliance with the Carriage of Dangerous Goods and Use of Transportable Pressure Equipment Regulations 2009 the Transport Specialist Inspector assessed against; Management Systems, Packaging Operations and Maintenance, Package Preparation and Consignment, Management and Control of Transport Interfaces, Training and Competencies and Emergency Planning and Testing.

In my opinion, based upon the arrangements sampled and the discussions on site, there are no significant shortfalls in the delivery of safety and therefore an inspection rating of Green is appropriate for LC4, 5, 32, 34 and Carriage of Dangerous Goods and Use of Transportable Pressure Equipment Regulations 2009.

Conclusion of Intervention

After considering the evidence examined during the inspection against Licence Conditions 4, 5, 32, 34 and Carriage of Dangerous Goods and Use of Transportable Pressure Equipment Regulations 2009, ONR concluded that the licensee complied with its legal duties and an inspection rating of Green was determined for all aspects. Two minor non-compliance issues are noted within the LC32 arrangements; two Level 4 ONR regulatory issues have been raised to monitor progress of these.

There are no findings from this intervention that could significantly undermine nuclear safety. At present, no additional regulatory action is needed over and above the planned interventions at HYA Power Station.