Mechanical spectral shift reactor

Details Mechanical spectral shift reactor Mechanical spectral shift reactor

1986-09-24

1987-12-01

Behrend, Harvey E.

Induced nuclear reactions: processes, systems, and elements

With control of reactor

Spectral shift

376220, 376327, 376236, 376339, G21C 726

Patent

active

047103400

ABSTRACT:
The mechanical spectral shift reactor provides a method and apparatus for controlling a nuclear reactor comprising inserting a plurality of reactor coolant displacer members into the reactor at the beginning of the core life. The displacer members reduce the volume of reactor coolant-moderator in the core at the start-up. As the reactivity of the core declines with fuel depletion, a selected number of displacer members are withdrawn from the core at selected time intervals. The withdrawal of the displacer member allows reactor coolant water to enter the core which increases core moderation at a time when fuel reactivity is declining. Thus for a given amount of nuclear fuel the life of the core can be extended or for a given life of a core the uranium fuel requirements can be reduced.

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