Office for Nuclear Regulation

Hunterston B planned intervention

Executive summary

Purpose of intervention

The purpose of this intervention was to undertake Licence Condition [LC] compliance inspections at EDF Energy Nuclear Generation Ltd’s [NGL’s] Hunterston B power station, in line with the planned inspection programme contained in the Hunterston B Integrated Intervention Strategy [IIS] for 2015/16.

Interventions Carried Out by ONR

This intervention included compliance inspections against the following Licence Conditions:

In addition I attended an annual meeting with the SEPA inspector to discuss matters of mutual regulatory interest. I also observed a workshop led by NGL to review its nuclear safety requirements [NSRs] and re-draft as part of an ongoing ONR review into regulation under LC23(4).

Explanation of Judgement if Safety System Not Judged to be Adequate

No system inspection was undertaken during this intervention

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

The LC32 compliance inspection was undertaken jointly with the SEPA inspector. During the inspection we:

During the LC34 compliance inspection I made the following observations and judgements: 

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

Conclusion of Intervention

In light of the recent recovery in the RWFI metric and ongoing careful management of low level waste stocks, I have allocated an IIS rating of 3 – Adequate for LC32.

In light of continued delays in fully implementing the company arrangements under LC34, I have allocated an IIS rating of 4 – Below standard. A Level 4 regulatory issue has been raised accordingly to record and manage progress towards resolution.

There are no findings from this inspection that could significantly undermine nuclear safety. It is also judged that no additional regulatory action is needed over and above the planned interventions of the Hunterston B power station as set out in the Integrated Intervention Strategy, which will continue as planned.