Nuclear reactor with flow guidance in the upper internals

Details Nuclear reactor with flow guidance in the upper internals Nuclear reactor with flow guidance in the upper internals

1987-04-01

1988-11-29

Behrend, Harvey E.

Induced nuclear reactions: processes, systems, and elements

Reactor structures

Orifice or fluid control at inlet or outlet of coolant channels

376399, G21C 1500

Patent

active

047880325

ABSTRACT:
A nuclear reactor has a pressure resistant vertical vessel with inlet and outlet pipes situated at the same horizontal level. It also includes internals having a barrel supporting the core and defining with the vessel a down flow path for the coolant from the inlet pipes towards a space under the core and upper internals defining a flow path for the coolant leaving the core, above this latter, and flowing towards the outlet pipes. The upper internals include dividing walls defining circumferentially distributed volumes located at the common level of the pipes and each over a different angular sector. Some volumes belong to the initial part of the downgoing coolant path and the others force part at least of the coolant leaving the core to follow a path which is successively directed upwardly then curving towards the outlet pipes. The invention is particularly suitable for use in pressurized water reactors.

REFERENCES:
patent: 3481832 (1969-12-01), Rickert
patent: 4289291 (1981-09-01), Goddard
patent: 4537891 (1985-12-01), Gibbons et al.
patent: 4659539 (1987-04-01), Kimbrell et al.
patent: 4681728 (1987-07-01), Veronesi et al.
EPRI NP-1015, vol. 2, Feb. 1979, pp. 2-63, 2-65, 2-67, 2-68, 2-69, 2-71, 2-73, 2-75, 2-77, 2-79.

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