Office for Nuclear Regulation

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THORP LC 10 12 & 32 Routine Compliance Inspection and Information Sharing

Executive summary

Purpose of intervention

The purpose of this intervention was for the Office for Nuclear Regulation (ONR) to undertake a Licence Condition (LC) compliance inspection to assess Sellafield Ltds (SLs) compliance with the following LCs within the Thermal Oxide Reprocessing Plant (THORP) Chemical Plants area inline with the approved ONR Sellafield Intervention Strategy.

Interventions Carried Out by ONR

ONR carried out a one-day team inspection comprising of two ONR inspectors and in addition held a series of information sharing session between the THORP Site Inspector and key SL personnel. This intervention included inspections to assess the adequacy of SLs implementation of its arrangements for compliance with LCs 10, 12 and 32.

Explanation of Judgement if Safety System Not Judged to be Adequate

N/A as this was not a safety system inspection.

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

SL has in place a robust process for the accreditation/authorisation of SQEPs and DAPs.

SL has an appropriate, intelligently targeted plan for the implementation of the Systematic Approach to Train (SAT) process.

There is an over reliance on a small number of SQEP individuals in the training and authorisation of some roles within THORP. While this does not appear to be currently affecting the quality of the training and assessment, it leaves THORP vulnerable to the loss of key individuals, and SL was advised that a system to formalise and record the knowledge held by these individuals would mitigate this risk.

The arrangements for dealing with low level waste (LLW) in THORP are adequate and measures are being taken to try and reduce the generation of low level waste. A new process for the control and processing of low-level waste is under implementation and it was my opinion that there are opportunities to improve understanding of the new arrangements; I recognise, however, that these had not been fully implemented at the time of this inspection.

Conclusion of Intervention

Overall based on the sampling undertaken I considered that SL had demonstrated adequate implementation of its arrangements for compliance with LCs 10, 12 and 32, consequently, an IIS rating of 3 - Adequate was an appropriate compliance rating for each of these LCs.