Office for Nuclear Regulation

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Heysham 1 Planned Intervention including System Based Inspection (SBI 20) - Liquid Waste

Executive summary

Purpose of intervention

The purpose of this intervention was to carry out a system based inspection of the liquid radioactive waste at the EDF Energy Nuclear Generation Limited's (NGL's) Heysham 1 power station in line with the planned inspection programme contained in the Heysham 1 Integrated Intervention Strategy (IIS) for 2016/17.

Interventions Carried Out by ONR

The ONR nominated site inspector and two nuclear liabilities specialist inspectors performed a System Based Inspection (SBI) of the liquid radioactive waste system to judge the system performance against its safety function. Through examination of this system and associated sub-systems, we performed compliance inspections against the following Licence Conditions (LCs) :-

In addition the following key activities were also undertaken:

Explanation of Judgement if Safety System Not Judged to be Adequate

From the areas sampled during this inspection, we judged that overall the liquid radioactive waste system met the requirements of the safety case.

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

With respect to the SBI the following judgements were made:

Following a review of the radioactive waste Regulatory Issues 2751, 3808, 3809, 3813 we judged that suitable and sufficient progress was being made to address ONR's concerns raised under these issues.

In particular it was judged that significant progress had been made with respect to the management of radioactive material stored in the decontamination workshop. In light of this and the ongoing action plan we judged that this met the requirements of ONR Issue 3813 which will be recorded as complete.

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

Following the system based inspection of the liquid radioactive waste system we judged that compliance with LC10, 23, 24, 27 and LC34 met the expected standards and were rated as green. A couple of minor shortcomings were noted and will be tracked through the ONR issues database under issues 4466 and 4467 as part of normal regulatory business. Notwithstanding these minor issues, overall we judged that the liquid radioactive waste system met the requirements of the safety case.

There are 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 of Heysham 1 power station as set out in the Integrated Intervention Strategy, which will continue as planned.