Extension of Operating Period for Heysham 1 Reactor 1.

Heysham 1 and 2 by David Autumns

Sharing this from the Office for Nuclear Regulation. This is so very wrong.

The Office for Nuclear Regulation have bowed to EDF’s ask that they are granted a runtime extension to the start of the “Statutory” Outage Period. This is so EDF can get their logistics together on the other Reactors maintenance on site (There are 4 cores at Heysham). So the dodgy broken boiler of Heysham 1 Reactor 1 will be running for longer than the planned period – does that sound like something the regulators should wave through?

There has been no public participation on this – the ONR simply gave EDF the thumbs up. Meanwhile dodgy old nuclear reactors are kept running while renewables are dumped. Much has been made of the fact that wind farms are being turned off because there is currently too much electricity going into the grid !! But the dodgy old nuclear reactors keep on keeping on.

The ONR’s full document can be seen here

Some Extracts below:

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Heysham 1 Reactor 1 Periodic Shutdown 2020 ONR Agreement for Extension of Operating Period for Heysham 1 Reactor 1

Project Assessment Report ONR-OFD-PAR-19-016 Revision 0 01 April 2020

Permission Requested

EDF Energy Nuclear Generation Limited (NGL) has requested Agreement from the Office for Nuclear Regulation (ONR) to extend the operating period of Heysham 1 Power Station Reactor 1 (R1) by a period of 71 days to no later than16th June 2020. This request is made in accordance with Licence Condition (LC) 30 (Periodic Shutdown) of the station’s nuclear site licence.

The current operating period for R1 will expire on the 06 April 2020. NGL wish to extend this operating period until the 16 June 2020. The reason for this extension request is due to the delays with completing post R2 defueling outage activities as a result of the necessity to exchange the west side fuelling machine long travel wheels. The subsequent pre-outage fuelling process activities are now not expected to be completed until mid to late May 2020.

Additionally, following the successful injection of oxygen into Reactor 2 (R2) in October 2019 and as part of the failed fuel mitigation activities, Heysham 1 intend to carry out modifications to the gas circulator IGV differential pressure impulse lines during the statutory outage. This is an enabling activity for a potential future R1 oxygen injection campaign. An outage start date in April 2020 could result in the preparatory activities for the impulse line modifications not being completed on time.

Finally, an outage start date in April 2020 overlaps with the current statutory outage at Heysham 2. While the pressure on resources is being managed, delaying the Heysham 1 outage would assist in reducing pressure on those staff supporting both outages.

NGL claim this extension will have no impact on the safe operation of R1.

Matters arising from ONR’s work

During the assessment, ONR was informed by NGL that a number of control rod standpipes and gas circulator penetration liner welds are overdue examination in accordance to the current written scheme of examination (WSE) necessary to comply with the Pressure System Safety Regulations 2000 (PSSR) 9(1) obligations. Enforcement associated with this breach of conventional legislation will be considered separately by ONR through the application of ONR’s enforcement management model.

  •   The potential impact of the deferral on degradation mechanisms related to physical parameters such as temperature, irradiation, pressure etc. is negligible.
  •   The potential impact of the deferral on other known time-related degradation mechanisms is very small, and any increase in risk would be negligible.
  •   Safety case commitments and caveats made to support safety case claims, including JCOs, IJCOs and Availability Assessments, will not be affected by the proposal.
  •   There are no commitments from the previous return to service EC that will be affected by the deferral.

The risk of continued operation of R1 for up to 71 days beyond 6th April 2020 is ALARP. This view is based on:

  •   A negligible increase in risk due to a 71 day deferral to the outage start date.
  •   Significant safety benefits in delaying the R1 statutory outage including the opportunity to include oxygen injection modifications in the scope of the 2020 outage and enable the repair of the fuelling machine defects prior to the outage commencement.
  •   Reasonably practicable risk reduction measures have been considered.ONR review of outage deferral requestDuring the assessment, ONR was informed by NGL that a number of control rod standpipes and gas circulator penetration liner welds 1B1 and 1B2 are overdue examination in accordance to the current written scheme of examination (WSE) necessary to comply with the Pressure System Safety Regulations 2000 (PSSR) 9(1) obligations. Enforcement associated with this breach of conventional legislation will be considered separately by ONR through the application of ONR’s enforcement management model.Each of the ONR specialist inspectors; civil engineering, structural integrity, graphite, mechanical engineering, electrical engineering and control and instrumentation, examined the NGL safety justification for the outage deferral. Overall the specialist inspectors considered that the deferral would have no, or negligible, impact on nuclear safety and they all supported, or had no objections to Agreeing to the extension to the operating period for R1.Their judgements were supported by the evidence that:

6 RECOMMENDATIONS

26. I recommend ONR issues Licence Instrument 627 under LC30(2) for Nuclear Site Licence 60, giving ONR’s Agreement to extend the operating period of Heysham 1 Reactor 1, so that the periodic shutdown commences no later than 16 June 2020.

Office for Nuclear Regulation Page 10 of 11

Report ONR-OFD-PAR-19-016 CM9 Ref: 2020/78918

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3 thoughts on “Extension of Operating Period for Heysham 1 Reactor 1.

  1. Stuart Hunter

    GREAT NEWS. Heysham 1 staying on line to better prepare for their outage ( improved safety) while securing low carbon electricity for the UK (environmentally friendly). Why do you never post any of my comments……do you believe in a communist state?

  2. Your comments are often posted here .. Whereas mine are blocked from nuclear industry sites. Not sure what the reference to communism means …The nuclear industry is alone in being communist by necessity….we all pay, many times over.

  3. Pingback: Issues Briefing – The ONR – Close Capenhurst

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