BWR recirculation system

Induced nuclear reactions: processes – systems – and elements – Reactor structures – Circulating fluid within reactor

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376407, 376379, G21C 1502

Patent

active

051357119

ABSTRACT:
A BWR coolant recirculation system includes a pump deck disposed in a downcomer and fixedly joined to a reactor pressure vessel and reactor core shroud. A plurality of circumferentially spaced reactor internal pumps (RIPs) are joined to the deck and operable in a pumping mode for pumping downwardly a reactor coolant from the downcomer and into a core inlet. In a pump inoperable mode, a portion of the coolant bypasses the RIPs for allowing increased natural recirculation of the coolant from the downcomer and into the core inlet.

REFERENCES:
patent: 3621926 (1971-11-01), Townsend
patent: 4663116 (1987-05-01), Masuhara et al.
patent: 4696792 (1987-09-01), Hobson
patent: 4847043 (1989-07-01), Gluntz
patent: 4879087 (1989-11-01), Akiyama et al.
Wilkins et al, Advanced BWR: Design Improvements Build on Proven Technology, Nuclear Engineering International, reprint Jun. 1986, pp. 1-7 and drawing entitled "The World's Reactors No 89".
T. Baumeister, Standard Handbook For Mechanical Engineers, 1967, Title and copyright pages, and pp. 14-16 through 14-19.
Foster et al, "Basic Nuclear Engineering", 1977, pp.: cover, copyright, 436-439 and 443-446.

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