Office for Nuclear Regulation

Heysham 1 Reactor 1 Statutory Outage 2020 Radiological Protection inspection

Executive summary

Purpose of Intervention

This intervention report relates to an inspection at Heysham 1 power station during the 2020 statutory outage of Reactor 1. Due to COVID restrictions, the intervention on site was carried out by EDF’s corporate Radiological Protection (RP) function, with oversight from ONR.

The aim of the RP intervention was:

Interventions Carried Out by ONR

The plant visit was carried out by RP staff from NGL corporate centre (as stated above). This inspection sampled the following through discussions, document review, and plant visits:

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable.

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

The RP inspection did not reveal any significant nuclear safety concerns relevant to the Heysham 1 Reactor 1 outage that require action by the Licensee or further follow-up by ONR.

Discussions with the Head of Radiological Protection (HoRP) for Heysham 1 gave me suitable assurance that there is effective RP practice in place; an adequate level of compliance with the requirements of IRR’17 was noted by the RP staff from the NGL corporate centre.

An inspection rating of Green was therefore assigned against IRR’17.

Conclusion of Intervention

I identified no matters that should prevent ONR granting Consent under license condition 30 allowing the Licensee to return Heysham 1 Reactor 1 to power in due course.