Office for Nuclear Regulation

This website uses non-intrusive cookies to improve your user experience. You can visit our cookie privacy page for more information.

Hunterston B Power Station - Planned Intervention

Executive summary

Purpose of Intervention

This was a planned inspection of EDF Energy Nuclear Generation Ltd.'s (NGL's) Hunterston B Power Station, undertaken as part of the planned intervention strategy for the Operating Facilities Division (OFD) of the Office for Nuclear Regulation (ONR).

The work was carried out in accord with the planned inspection programme contained in the Hunterston B Integrated Intervention Strategy (IIS) for 2017.

Interventions Carried Out by ONR

As part of this intervention I, the nominated site inspector, along with the Scottish Environment Protection Agency (SEPA) site inspector carried out joint inspections against:

I also participated in the ONR inspection team that assessed the Level 1 demonstration exercise that sought to demonstrate the adequacy of emergency and security plans prepared under LC 11 Emergency arrangements and the Nuclear Industries Security Regulations.

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

I also attended other meetings and received an update on the progress being made to close out regulatory issues previously raised.

Explanation of Judgement if Safety System Not Judged to be Adequate

No system based inspection was undertaken hence, this is not applicable for this intervention.

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

Licence Condition 32 (Accumulation of radioactive waste) - We inspected the Low Level Waste facility where it was found that the waste accumulated did not meet the requirements of LC 32 which requires the rate of accumulation and total quantity of radioactive waste to be minimised so far as is reasonably practicable. We were however satisfied with the actions being taken by the station, as the hazard is low and a programme of work is established to address this issue during 2018. We therefore assigned a rating of Green (no formal action) for LC32.

Licence Condition 34, (Leakage and escape of radioactive material and radioactive waste), requires that radioactive material and radioactive waste are adequately controlled or contained so that they cannot leak. The inspection of the LLW facility showed that some of the LLW packages were not adequately contained which is a contravention of the licence condition. We were satisfied that the programme of work mentioned above would adequately address this matter. The station was also non-compliant with aspects of the station's arrangements for categorisation and reporting of radioactive leaks. Whilst a regulatory issue was raised to address this matter we were satisfied that no formal action was required and therefore assigned a rating of Green for LC34.

Licence Condition 11, (Emergency arrangements) - we assessed the demonstration of the approved site emergency and site security plans. The exercise was an adequate demonstration of the emergency and security arrangements with strong performances in command and control demonstrated in some areas. Some areas for improvement were identified and these will be communicated to the site by separate letter. We therefore assigned a rating of Green (no formal action) for LC11.

Conclusion of Intervention

There were no findings from this inspection that could significantly undermine nuclear safety. At present, no additional regulatory action is needed over and above the planned interventions at Hunterston B Power Station as set out in the Integrated Intervention Strategy, which will continue as planned.