Heysham 2 - Reactor Unit 7 Statutory Outage 2018 Radiological Protection Inspection
- Site: Heysham 2
- IR number: 18-056
- Date: May 2018
- LC numbers: N/A
Purpose of Intervention
This intervention was in relation to the 2018 statutory outage of Reactor 7 (R7) at Heysham 2 and in particular the radiological protection (RP) arrangements that the licensee had in place for the outage. It was conducted as part of a series of planned ONR interventions related to the Heysham 2 statutory R7 outage.
The aim of this specialist intervention was to:
- To meet with the requirements of the Heysham 2 Power Station R7 Statutory Outage Project as defined in the ONR Outage Plan.
- To provide regulatory confidence in the implementation of the Heysham 2 Power Station R7 Statutory Outage Intentions Document in relation to RP and compliance with Ionising Radiations Regulations 2017 (IRR17).
- To provide evidence to inform the ONR decision relating to the issue of a Licence Instrument for Consent for return to service of R7 at Heysham 2 on completion of the work undertaken during the outage. The conclusions on these matters inform the development of the overall opinion of the Licensee’s readiness to bring R7 back to power in due course.
Interventions Carried Out by ONR
During the intervention a review of radiological protection arrangements was addressed. This included:
- RP aspects of the Heysham 2 Power Station R7 Statutory Outage Intentions Document HB/REPS/OM052
- Review of the Pre-Outage ALARP and Vessel Entry ALARP Report
- Overall RP arrangements for staff and contractors during the outage
- Suitability of Radiation Work Permits (RWPs) and Local Rules
- Man access arrangements for vessel entry
- Contingency plans for vessel entry work
- Contingency plans for open vessel pile cap operations
- Arrangements for providing adequate contamination monitoring of persons and areas
- RP resources and implementation of arrangements
- Control and supervision of RP support contractors
- Vessel entry complex arrangements
- Designation of temporarily C2 contamination areas.
- Radiological protection arrangements for:
- New In-Core Inspection Equipment/Trepanning inspection work
- Site radiography
The intervention was performed in line with ONR's guidance requirements (as described in our technical inspection guides) in the areas inspected.
The intervention was performed in line with ONR’s guidance requirements (as described in ONR technical inspection guides, which can be found at www.onr.org.uk/operational/tech_insp_guides/index.htm) in the areas inspected.
Explanation of Judgement if Safety System Not Judged to be Adequate
Not applicable – no system based inspection was undertaken.
Key Findings, Inspector's Opinions and Reasons for Judgements Made
This sampled inspection did not reveal any significant nuclear safety issues relevant to the R7 outage that require action by the Licensee or further follow-up by ONR.
Discussions with the Head of Radiological Protection (HoRP) at the Station indicated their strong commitment to effective radiological protection practice and a good level of compliance with the IRR17 was evident during plant inspections.
An inspection rating of Green was therefore assigned against IRR17.
Conclusion of Intervention
From a RP standpoint, we were content with the Licensee’s conduct of its statutory outage work programme and with its level of compliance against its associated RP documentation (polices & procedures).
At the time of writing this report, there were no specific RP recommendations that need to be made relating to ONR granting a Consent under licence condition 30 of the Licensee’s nuclear site licence allowing the Licensee to return R7 to power in due course.