Neutron-absorbent control cluster for a nuclear reactor

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 5742655
SERIAL NO

08570874

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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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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Patent Owner(s)

Patent OwnerAddress
COMPAGNIE GENERALE DES MATIERES NUCLEAIRES2 RUE PAUL DAUTIER 78140 VELIZY-VILLACOUBLAY
FAMATOMETOUR FRAMATOME - 1 PLACE DE LA COUPOLE COURBEVOIE 92400

International Classification(s)

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  • 1995 Application Filing Year
  • G21C Class
  • 168 Applications Filed
  • 76 Patents Issued To-Date
  • 45.24 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances19951996199719981999200020012002200320042005200620070255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hertz, Dominique Sainte-Foy-les-Lyon, FR 18 136
Pillet, Luc Lyons, FR 3 14

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Patent Citation Ranking

  • 10 Citation Count
  • G21C Class
  • 7.75 % this patent is cited more than
  • 27 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges1191289301 - 1011 - 2021 - 3031 - 4005101520253035404550556065707580859095100

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