Dismantling in the Controlled Area
- Reactor hall in the Greifswald NPP
- Preparing the transport of a pressurizer part into the ISN
- Dismantling of a steam generator in unit 4
- Dismantling of a blow-off tank after removal of wall and covering segments
Concerning the equipment in the controlled area all parts to be dismantled are supposed to be contaminated.
After the respective plant part has been released for dismantling, the cables, electric motors and I&C facilities are dismantled at first. Then the heat insulation will be removed. The dismantling is carried out by commercial, manually operated and proved equipment under the usual supervision of the radiation protection. The dismantling of contaminated plant parts follows in principle room by room starting from areas with lower to those with higher contamination levels.
To reduce the dose commitment for the personnel, measures are taken if necessary (for example decontamination or shieldings).
In the beginning of the decommissioning and dismantling was done a radiological charactarization of the plant parts.
Some of the dismantled and cut plant parts can be directly reused as scrap after an appropriate radiological free release. Other parts will be reused only after decontamination or decay storage and radiological free release or they will be stored at a dump under special conditions (for example heat insulation).
- Cutting the protective hood of a reactor in the reactor hall to store it in the ISN
In November 2007 the mass of the already dismantled equipment from the controlled areas differed from unit to unit. Altogether there were dismantled about 23.000 tons of controlled area equipment, i.e. about 64% of the entire mass to be dismantled.
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