Neutron-absorbent control cluster for a nuclear reactor
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United States of America Patent
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Apr 21, 1998
Grant Date -
N/A
app pub date -
Dec 12, 1995
filing date -
Dec 13, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A control cluster for a water cooled and moderated nuclear reactor, comprises a spider and rods suspended from the spider. Each rod contains neutron-absorbing material. In a lower portion of each rod, the material is a metal neutron absorber. In an upper portion, it is a stack of pellets of boron carbide B.sub.4 C. In a middle fraction occupying a height lying in the range 35% to 45% of the total height, it is zirconium diboride ZrB.sub.2 isotopically enriched in boron 10 or hafnium diboride HfB2.
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