Office for Nuclear Regulation

Planned Licence Condition Compliance Inspection and Site Stakeholders Group meeting

Executive summary

Purpose of Intervention

This inspection was one of a series of planned inspections for 2018/19, which are informed by the ONR Decommissioning Fuel and Waste (DFW) sub-division strategy.   

Interventions Carried Out by ONR

I undertook this inspection to examine the adequacy of the Magnox Limited (ML) arrangements and their implementation on the Wylfa site for compliance with three Licence Conditions (LC); LC 11 (emergency arrangements), LC 26 (control and supervision of operations) and LC 28 (examination, inspection, maintenance and testing).

For LC 11, I focused on the licensee’s review of the recent Radsafe emergency demonstration, which ONR observed.  For LC 26 and 28 I focused on the licensee’s recovery of intermediate level radioactive waste from irradiated fuel dry storage cell four.  ONR recently permissioned commencement of the active phase of the recovery operations.

In addition the licensee presented the proposal to revise the minimum safety related plant (MSRP) required to support defuelling.  The licensee considers that the proposal will benefit nuclear safety.  I also received an update on defuelling operations, including observing a meeting of the Wylfa defuelling oversight board.

I attended the Wylfa Site Stakeholders’ Group meeting where I presented my report on ONR’s regulatory interactions with site between January and May 2018.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable.

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

Based on the evidence examined it is my judgement that Magnox Limited is effectively implementing arrangements for complying with LC 11, LC 26 and LC28 at Wylfa.  I identified a number of areas of good practice and areas where Magnox Limited could improve.

Overall I judged as reasonable the licensee’s proposal to revise MSRP to support safe defuelling operations.   

Conclusion of Intervention

I identified no matters that in my opinion could adversely affect nuclear safety.  My findings were shared with and accepted by the licensee.