Office for Nuclear Regulation

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Hinkley Point B Planned intervention

Executive summary

Purpose of intervention

This was a planned inspection of EDF Energy Nuclear Generation Ltd’s (NGL’s) Hinkley Point B power station, undertaken as part of the planned intervention strategy for the Civil Nuclear Reactor Programme (CNRP) of the Office for Nuclear Regulation (ONR).

The work was carried out in line with the planned inspection programme contained in the Hinkley Point B Integrated Intervention Strategy (IIS).

Interventions Carried Out by ONR

An ONR radioactive waste inspector, an ONR control and instrumentation inspector and I (the nominated site inspector for Hinkley Point B) carried out:

The intervention was performed in line with ONR’s guidance requirements (as described in our technical inspection guides) in the areas inspected.

Explanation of Judgement if Safety System Not Judged to be Adequate

Not applicable - no system based inspections were carried out during this visit.

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

We carried out a compliance inspection of LC22 (modification or experiment on existing plant) and based on the inspection of modifications proposed for the Reactor 4 Statutory outage we were satisfied that adequate processes were in place to control and categorise the plant modifications.  We therefore assigned an IIS rating of - 3, (adequate) to this inspection.

 We carried out a compliance inspection of LC26 (control and supervision of operations) and we were satisfied that procedures were in place to ensure that work during the outage was carried out by suitably qualified persons and that appropriate levels of supervision had been identified.  We considered that the training provided in the outage leadership workshop was of a good quality and that this highlighted the key expectations and correct behaviours expected during the outage.  We therefore assigned an IIS rating of – 2 (good) to this inspection.

We participated in a successful COMAH (Control of Major Accident Hazards) inspection with the Competent Authority and identified some areas of good practice and areas for further work.

We carried out an inspection of the Ionising Radiation Regulations and were satisfied with the compliance arrangements that were in place regarding the control of radiography on the site.

We carried out a conventional health and safety inspection and noted the site initiatives to enhance access to turbine hall cranes, compliance with the lifting and pressure system regulations, measures to reduce slips/trips/falls and preparations for the outage.

We met with the site internal regulator (Independent Nuclear Assurance – INA) to discuss recent incidents, compliance with pressure system regulations, outage preparations, ONR issues database, communications and inspection plans for 2015/16. 

We also held information exchange meetings with station staff on a range of topics including planning for the next level 1 emergency exercise, management of hot standpipes, a visit by Baroness Verma, progress with the gas turbine fuel oil tanks, the removal of the interim package boilers, a review of station performance in 2015, ONR flexible permissioning, an update on turbine alternator 7 and progress with commissioning of the new Nitrogen injection system.

Conclusion of Intervention

For LC22 (modification or experiment on existing plant) and LC26 (control and supervision of operations) we were satisfied that processes were in place to demonstrate adequate/good compliance with the licence condition.

Inspection of COMAH, Ionising Radiation Regulations and conventional health and safety did not raise any major concerns.

There are no findings from this inspection that could significantly undermine nuclear safety.