Auxiliary platform for boiling water reactors

Induced nuclear reactions: processes – systems – and elements – Handling of fission reactor component structure within... – Refueling machines

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G21C 1900

Patent

active

052915310

ABSTRACT:
An auxiliary platform has a one-ton hoist which may be used in conjunction with a rigid pole handling system. The positioning of the one-ton hoist, as well as the positioning of a trolley on which the hoist is mounted and the positioning of the platform, is centrally controlled at a control panel. In one embodiment, a new set of tracks are provided on either side of a refueling pool. A pair of cavity platforms are installed over the edges of the reactor cavity to receive the new set of tracks and to thereby allow the auxiliary platform to travel over the reactor cavity. In another embodiment, the existing tracks are extended and a single new track is provided between the equipment pool and the reactor pressure vessel head pedestal and spent fuel cask washdown area. The auxiliary platform is made extendable so that it can travel over the width of the existing tracks and also over width defined by the new track and one of the existing tracks. The auxiliary platform can work independently of the refueling platform on a separate task or can aid the refueling platform in performing a single task. The auxiliary platform can both shorten the critical path time and reduce the exposure of radiation to workers.

REFERENCES:
patent: 3168444 (1965-02-01), Ingram
patent: 4056435 (1977-11-01), Carlier et al.

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