As part of the decontamination of the reactor coolant system at GKN I, 1.2 kilometres of tubing and 300 metres of pipelines were laid at the plant.
In the post-operational phase, the fuel rods are transferred from the reactor pressure vessel (RPV) to the fuel pools in the reactor building. They are then monitored there and cooled. With the involvement of the authorities and auditors, a large proportion of the systems and plant components previously required for power operation can be decommissioned and the servicing, maintenance and testing tasks, as well as the operating regulations, can be adapted.
In addition, the post-operational phase is used to decontaminate nuclear systems and minimise the volume of radioactive waste. This includes the cleaning of the surfaces – such as the plant components and pipelines – to remove and more specifically to collect any radioactive particles that have adhered to them. This task can be completed e.g. in a residual material treatment centre established on-site for this purpose to minimise transportation.