Permanent refueling pool seal

Induced nuclear reactions: processes – systems – and elements – Seal arrangements

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Details

376264, 376288, 376294, G21C 1300

Patent

active

051026120

ABSTRACT:
A permanent pool seal and neutron shield 30 for providing an effective water barrier over the annular space 28 between a nuclear reactor vessel flange 24 and a surrounding annular ledge 22 includes annular deck sections 32 supported on spaced ribs 46.
Flexible membranes 50,52 on the deck section peripheries accommodate relative movement. Openings 42, each with a removable plug structure which includes cover 44 and tapered can 60, provide vessel cavity 14 with ventilation and maintenance access. All cans 60 and similar containers 56 and 59 under the deck structure and flange 24 contain a shielding material 58 in the form of a boron-containing concrete. Supported below the cans is refractory insulating material 54.

REFERENCES:
patent: 4070221 (1978-06-01), Anthony
patent: 4090087 (1978-05-01), Weissenfluh
patent: 4650643 (1987-03-01), Anthony
patent: 4747993 (1988-05-01), Hankinson et al.
patent: 4753768 (1988-06-01), Puri
patent: 4904442 (1990-02-01), Swida et al.
patent: 4905260 (1990-02-01), Swida et al.

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