Office for Nuclear Regulation

Hunterston A compliance inspection  

Executive summary

Purpose of Intervention

This inspection was to inform the release of the regulatory hold point that will enable the licensee at Hunterston A (HNA) to commence breakthrough of the wall from within Solid Active Waste Bunker (SAWB) No. 2 into Bunker No.1 to allow Intermediate Level Waste (ILW) retrieval operations to commence from the final bunker.

Interventions Carried Out by ONR

I carried out a compliance inspection of HNA’s arrangements and their implementation for SAWB No. 1 breakthrough and ILW retrieval operations. Other meetings on the Solid ILW Encapsulation plant and risk based de-planting also took place.

Explanation of Judgement if Safety System Not Judged to be Adequate

N/A.

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

The inspection to judge whether to release the SAW Bunker 1 retrievals regulatory hold point included the following elements:

I confirmed that the scope of the review and level of internal challenge in the SCENATE meeting was sufficient. I found evidence of plant readiness and I am confident that the DAP and operators are Suitably Qualified and Experienced Persons (SQEP) to carry out the breakthrough and ILW retrieval operations. I reviewed ML HNA Site Inspector’s ORR report and judged that he had undertaken a comprehensive independent review.

From the evidence gathered during the inspection related to readiness for SAW Bunker 1 breakthrough and FED retrieval operations, I am content that the arrangements are adequate.

Conclusion of Intervention

I consider that the appropriate regulatory action is to release the regulatory hold point to enable HNA to commence SAWB No. 1 breakthrough and Fuel Element Debris (FED) retrieval operations.