Induced nuclear reactions: processes – systems – and elements – Control component for a fission reactor – Wherein concentration of the reactivity affecting material...
Patent
1984-07-23
1986-11-25
Behrend, Harvey E.
Induced nuclear reactions: processes, systems, and elements
Control component for a fission reactor
Wherein concentration of the reactivity affecting material...
G21C 710
Patent
active
046248277
ABSTRACT:
A control rod with a "reduced worth" tip is provided for a nuclear reactor which includes an elongated tubular cladding with its opposite ends closed and having a plurality of pellets of two different types disposed in its lower end portion in an end-to-end relationship. One type of pellets is formed of a neutron absorbing material, such as B.sub.4 C, whereas, the other type of pellets is formed of an inert material, such as ZrO.sub.2. The absorber pellets and the inert pellets are interspaced between one another in the lower end of the rod so as to gradually reduce the rate of change of the neutron flux experienced at the rod's lower end portion as it moves in and out of the fuel assembly to thereby alleviate pellet-clad-interaction and thus reduce the likelihood of fuel rod failure. In one embodiment, the axial heights of the absorber pellets progressively increase from the bottom to the top of the rod's lower end portion while the axial heights of the interspaced inert pellets remain constant. In a second embodiment, the axial heights of the inert pellets progressively decrease from the bottom to the top of the rod's lower end portion while the axial heights of the interspaced absorber pellets remain constant.
REFERENCES:
patent: 3230147 (1966-01-01), Hitchcock
patent: 3255086 (1966-06-01), Hitchcock
patent: 3975233 (1976-08-01), Wende
patent: 4169759 (1979-10-01), Bevilacqua
patent: 4172762 (1979-10-01), Anthony et al.
patent: 4326919 (1982-04-01), Hill
patent: 4432934 (1984-02-01), Gjertsen et al.
patent: 4451428 (1984-05-01), Nishimura et al.
Doshi Pratap K.
Wilson John F.
Behrend Harvey E.
Westinghouse Electric Corp.
LandOfFree
Nuclear reactor control rod having a reduced worth tip does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Nuclear reactor control rod having a reduced worth tip, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nuclear reactor control rod having a reduced worth tip will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1157580