Complementary shutdown device for an undermoderated nuclear reac

Details Complementary shutdown device for an undermoderated nuclear reac Complementary shutdown device for an undermoderated nuclear reac

1985-01-28

1986-09-02

Behrend, Harvey E.

Induced nuclear reactions: processes, systems, and elements

Nuclear transmutation

By neutron bombardment

376346, 376434, 376435, 376449, 376327, G21C 100, G21C 708

Patent

active

046095217

ABSTRACT:
A complementary shutdown device for an undermoderated nuclear reactor, comprising, inside certain arrays (3) of the core, guide tubes (7) of which the cross-section is at least equal to the sum of the cross-sections of three rods (6), and which are surrounded by at least one row of fertile rods (8), and a set of shutdown rods, the cross-section of which matches the cross-section of the guide tubes (7). The shutdown is obtained by allowing the shutdown rods, containing a neutron-absorbing material, to fall into the arrays (3) of the core, in the position of maximum insertion. The invention applies, in particular, to pressurized water nuclear reactors.

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Fast Reactor Technology, Yevick (editor), the M.I.T. Press, 1966, pp. 677-680.

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