Office for Nuclear Regulation

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LC21 Commissioning Inspection of Defuelling process

Executive summary

Purpose of intervention

This intervention was intended to inspect Imperial College Reactor Centre's (ICRC) compliance with Licence Condition 21 (Commissioning) during the third active commissioning run of defuelling equipment installed at its Consort Reactor to allow complete defuelling of the reactor to proceed such that the irradiated fuel could be transported to Sellafield for storage.

Interventions Carried Out by ONR

We discussed ICRC's progress with first two active commissioning runs, and observed the third active commissioning run involving the transfer of fuel element 14 from the reactor tank into a shielded bogie and then into the transport flask.

Explanation of Judgement if Safety System Not Judged to be Adequate


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

We observed a satisfactory transfer of the fuel element, with ICRC demonstrating adequate operator and equipment performance. We noted a significant improvement in housekeeping from our non-active commissioning inspection the previous month, but made suggestions for improvement regarding loose article control, and command and control which ICRC acknowledged and acted upon.

Conclusion of Intervention

We considered the demonstration of active commissioning to be adequate and gave an IIS rating of 3.

We informed ICRC that we would be carrying out a further inspection of defuelling operations on 30 June & 1 July 2014.