Induced nuclear reactions: processes – systems – and elements – Control component for a fission reactor – Wherein concentration of the reactivity affecting material...
Patent
1984-11-13
1987-08-18
Behrend, Harvey E.
Induced nuclear reactions: processes, systems, and elements
Control component for a fission reactor
Wherein concentration of the reactivity affecting material...
376209, 376220, 376420, G21C 710, G21C 500
Patent
active
046876278
ABSTRACT:
An improved water displacer rod includes an elongated hollow thin-walled tube with a pair of end plugs attached to opposite ends of the tube to hermetically seal the tube and a plurality of support pellets disposed in a stacked relationship within the tube. The pellets allow the thin-walled tube to be laterally flexible while still able to resist collapse due to high external pressure. Each pellet is preferably formed of a body having a hollow annular cross-sectional shape and a pair of end webs extends across and closing opposite ends of the body. The body defines a central void and the webs seal the void. Thus, when the pellets are stacked within the tube, each void is sealed individually one from the next. A double barrier is provided in the displacer rod by the hermetically sealed tube and the individually sealed pellets. Even if the tube should fail, moderator water will not flood the tube interior since the stacked pellets occupy and encapsulate substantially all of the empty space within the failed tube. As a result, the displacer rod containing the failed tube will still be able to perform its intended function.
REFERENCES:
patent: 2852456 (1958-09-01), Wade
patent: 3234104 (1966-02-01), Gale et al.
patent: 3325375 (1967-06-01), Mogard
patent: 3510398 (1970-05-01), Wood
patent: 4273616 (1981-06-01), Andrews
patent: 4432934 (1984-02-01), Gjertsen et al.
Cerni Samuel
Gjertsen Robert K.
Wilson John F.
Behrend Harvey E.
Westinghouse Electric Corp.
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