Flexible amorphous composition for high level radiation and...

G - Physics – 21 – F

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G21F 1/02 (2006.01) G21F 1/10 (2006.01) G21F 3/00 (2006.01)

Patent

CA 2449744

An improved nuclear shielding material that is flexible so as to effectively fill voids in radiation containment structures. Under very high temperatures the material is designed to undergo pyrolysis and transform into a strong ceramic material. The material contains a number of components, the first of which is a polymeric elastomer matrix such as two part self-polymerizing system like RTF silicone rubber. Additional components include: a compound to shield gamma radiation like tungsten carbide powder, a neutron absorbing/gamma blocking compound such as boron carbide powder, a heat conducting material such as diamond powder, a high temperature resistant compond such as silicon dioxide powder, a second neutron absorbing compound which also imparts electrical conductivity, namely barium sulfate powder, and a hydrogen gas surpassing component which readily absorbs hydrogen such as sponge palladium.

L'invention concerne un matériau de blindage nucléaire amélioré permettant de remplir efficacement les vides dans des structures de confinement de rayonnement. A de très hautes températures, ledit matériau est conçu de façon à effectuer une pyrolyse et à se transformer en matériau de céramique résistant. Ledit matériau comprend un certain nombre de composants, le premier étant une matrice élastomère polymère telle qu'un système de polymérisation automatique en deux parties du type caoutchouc de silicone RTF. Les autres composants comprennent un composé destiné à produire un blindage contre un rayonnement gamma du type poudre de carbure de tungstène, un composé absorbant les neutrons/bloquant les rayonnements gamma du type poudre de carbure de bore, un matériau thermoconducteur du type poudre de diamant, un composé résistant à une température élevée du type poudre de dyoxide de silicone, un second composé absorbant les neutrons également électroconducteur, essentiellement une poudre de sulfate de baryum, et un composé remarquable par rapport au gaz d'hydrogène absorbant rapidement l'hydrogène tel que le palladium spongieux.

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