Conceptual design of core component handling system in PFBR

Core component handling consists of Invessel handling and ex-vessel handling subsystems. In vessel handling comprises of two rotatable plugs and a fixed Transfer Arm which handles subassemblies for invessel transfer between core, Internal storage locations and Invessel Transfer Position (IVTP). Ex-vessel handling comprises of storing, checking, loading of fresh core subassemblies into the reactor, unloading from the reactor, washing and storage of irradiated core subassemblies under water and shipping to reprocessing plant. From IVTP subassemblies are transferred to Ex-vessel Transfer Position (EVTP) by Inclined Fuel Transfer Mechanism. From EVTP subassemblies are handled by cell Transfer machines. The various options such as two rotatable plugs, one or two straight pull machines, one straight pull machine and/or one Transfer arm are considered for internal handling. Water pool and sodium storage vessel are the options for irradiated fuel storage. The final choice is one transfer arm and water pool storage. The choice has been made considering safety, simplification and cost reduction aspects. It ensures that the sizes of components such as rotatable plugs, roof slab, main vessel, etc., are minimized to reduce capital cost of the plant. (author). 7 refs, 5 figs, 1 tab