Induced nuclear reactions: processes – systems – and elements – Reactor structures – Circulating fluid within reactor
Patent
1991-09-27
1992-10-13
Hunt, Brooks H.
Induced nuclear reactions: processes, systems, and elements
Reactor structures
Circulating fluid within reactor
376210, 376361, 376444, G21C 1500
Patent
active
051548801
ABSTRACT:
A fuel bundle for a natural-circulation boiling-water reactor includes at least one coolant bypass tube which is at least partially open at both its top and bottom and extends about 2/3 of the bundle height. Water within the bypass tube remains liquid. As it exits the top of the bypass tubes, it merges with and "cools" the flow exterior to the tube. This arrangement reduces the pressure drop across the core, increasing coolant flow. In addition, the merging coolant helps improve heat transfer at the maximum heat flux levels within the core. Lateral holes through the bypass tube can further enhance with heat transfer distribution in the core. The reduced pressure drop in the core and the more uniform heat flux distribution both permit a reactor to operate at higher power ratings.
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Derwent Publications abstracting EP-378384--A issued to Hitachi Ltd., 1990.
G. Lill et al., "KWU's New 9.times.9 BWR Design Employs a Central Water Channel", Nuclear Engineering International, Feb. 1988, pp. 37, 41-42.
S. Helmersson et al., "SVEA-96: BWR Fuel for the 1990's", Nuclear Europe, Jan.-Feb. 1989, pp. 37-38.
Chelliah Meena
General Electric Company
Hunt Brooks H.
Schroeder Robert R.
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