Winter 2019

Powering ahead with switchgear at Winfrith

Magnox and the Nuclear Decommissioning Authority join James Fisher Nuclear for an equipment demonstration for a nuclear decommissioning project.

Key members of the Magnox senior leadership team and the Nuclear Decommissioning Authority (NDA) visited James Fisher Nuclear (JFN) for a demonstration of reactor segmentation equipment being developed for a nuclear decommissioning project.JFN is working with Magnox and the NDA on the decommissioning of SGHWR – or Steam-Generating Heavy Water Reactor – at Winfrith in Dorset.

Senior representatives from both parties visited JFN’s facility in Malton, North Yorkshire, where they had the opportunity to drive robots that will be used during the decommissioning process.  The visit was topped off with an impressive diamond wire saw demonstration.

The event coincided with the completion of a key enabler for the SGHWR Core Segmentation Project early works - the delivery of a package of new electrical switchgear.

Stuart Yellowlees, managing director of JFN, said during the visit: 

‘All in all it has proven to be a very successful day and an excellent presentation of what is being developed for the project. A big thanks to all JFN staff for their efforts.’ 

The new electrical switchgear has completed factory acceptance testing and is now ready for installation. It will enhance existing SGHWR electrical infrastructure and provide power to new equipment, including remote handling, heating ventilation and air conditioning systems (HVAC), grout and concrete plants and other supporting plant equipment.

John Allan, electrical, control and instrumentation design manager at JFN, says: 

‘This is a key part of the SGHWR project enabling works, replacing ageing existing equipment within the SGHWR facility. Availability of equipment will ensure reliable power supplies throughout the reactor decommissioning, and final remediation of the facility.’

This new switchgear will provide power to both temporary electric equipment used during the construction phases and the permanent supplies for the project. This alternative approach to delivery is faster than a traditional project build process, which would typically have two independent systems.

Installation of this equipment in the SGHWR buildings will commence in early 2020.

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