4. INTEGRAL REACTOR DECOMMISSIONING

Reactor plant decommissioning starts at unloading of spent fuel and internals. Unloading of fuel assemblies and dismounting of radioactive internals do not require special devices and do not limit methods and the time needed for decommissioning work, because equipment from the reactor is dismounted and unloaded by means of standard plant facilities used during operation (Fig 6).

At the same stage (calculated for 1-3 years) shghth activated and clean equipment is dismounted and disassembled, if it is not needed for the following operation stages.

The secondary stage of work (1-2 years duration) is associated with dismounting, disassembly and removal of reactor plant hot equipment from the plant site.

Slightly activated equipment is disassembled by conventional general industrial methods under control of the radiological safety service, and special facilities and mechanisms are not required.

Hot equipment is broken into fragments by means of remotely controlled manipulators in the concrete silos of the plant

Fragments are packed into protective transport fasks and removed to regional radwaste store.

Spent fuel assemblies in special van-containers are transported to fuel reprocessing plants.

The last stage (1-3 years) is decommissioning of the whole plant including building structures.