Office for Nuclear Regulation

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Intervention on Sellafield Source Database and HASS Reporting under LC 25(4) specification

Executive summary

Purpose of Intervention

This report presents the findings of an intervention that was undertaken at the Sellafield nuclear licensed site to examine Sellafield’s new source database and reporting of High Activity Sealed Radioactive Sources (HASS) to ONR under a Licence Condition 25(4) Specification.

Interventions Carried Out by ONR

The intervention consisted of a demonstration of the new source database and a discussion of the arrangements for reporting HASS to ONR in light of recently updated legislation [Environmental Permitting (England and Wales)(Amendment)(No.2)Regulations 2018]. The intervention also involved follow up of specific queries which I raised as a result of a review of HASS records held by ONR against Sellafield’s annual HASS returns. During this intervention I sampled selected sources on the new database to compare with the information reported to ONR.

Explanation of Judgement if Safety System Not Judged to be Adequate

N/A.  This intervention did not include a safety system inspection.

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

Based on the demonstration of the new source database I am satisfied that it is an improvement on the previous database; however there are still improvements which need to be made to the database, such as the update of details for multi-isotope sources, which Sellafield is aware of and intends to address.

During the intervention I sampled selected sources on the database and identified specific areas for Sellafield to follow up.  Some areas discussed will be taken away and considered by ONR such as suggestions from Sellafield on future HASS reporting when the current Licence Condition 25(4) Specification is reviewed.

Conclusion of Intervention

From what I observed and sampled during the course of this intervention I am satisfied the new source database is an improvement on the previous database; however there are still improvements which need to be made to the database which Sellafield is aware of and intends to address. I am also satisfied that Sellafield’s arrangements for reporting HASS to ONR under Licence Condition 25(4), using the new database, are adequate. Consequently, I have rated the intervention as Green. A future review of the Specification due to updates in the relevant legislation will impact upon Sellafield’s arrangements and Sellafield’s suggestions for HASS reporting will be considered and any proposed changes will be communicated with the site.