Start repair primary cooling pipes
stralen buis

External cleaning of
the reducer walls.

vervorm buis

Start repair primary cooling pipes

On Tuesday 18th May NRG received approval from the authorities to start the repair of the eroded parts of the High Flux Reactor’s primary cooling system. The surrounding concrete has been removed according to plan and the reducers have been extensively inspected and examined. The condition of the cooling pipes was in accordance with the expectations. At four locations the pipes are affected by galvanic corrosion. The inspections and previous executed tests showed that local repair of these four locations yield best results in regard to safety, time needed and finances. On basis of the inspections and measurement results NRG has decided in agreement with the authorities to execute local repairs. This means that the eroded parts will be removed and new aluminium piping material will be welded in.
The repairs to the High Flux Reactor are proceeding well and according to plan. There have been no safety incidents during the project and the radiation dose levels for internal and external employees have remained well below the planned limits. The levels of radiation during the removal of the jacket pipe and the external cleaning of the reducers gave no reason for taking additional measures. NRG issues a progress update every month. A special page has been added to the NRG website that contains background information, images and a video of the repair project: www.nrg.eu/hfr-repair. Previous updates are also available on the website.

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