Antiradiation concrete and antiradiation shell

C - Chemistry – Metallurgy – 04 – B

Patent

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Details

C04B 14/36 (2006.01) C04B 14/34 (2006.01) C04B 28/02 (2006.01) G21C 1/30 (2006.01) G21F 1/04 (2006.01)

Patent

CA 2341206

To achieve a shielding action which absorbs as much heat and radiation as possible, according to the invention an antiradiation shell (2) has a wall region (2a to 2z) which is formed from an antiradiation concrete (22a to 22z) which is provided with a first, boron-containing aggregate with a grain size of up to 1 mm and with a second, metallic aggregate with a grain size of up to 7 mm. In a first embodiment, the content of first, boron-containing aggregate in the antiradiation concrete (22a) is at least 5.0% by weight, in particular at least 7.8% by weight. In a second embodiment, the proportion of the second, metallic aggregate in the antiradiation concrete (22b) is from 80 to 90% by weight, in particular 85 to 89% by weight. In this case, the proportion of the first, boron-containing aggregate may lie in the range between 1.0 and 1.5% by weight.

Afin d'obtenir un effet d'écran maximal, absorbant la chaleur et les rayonnements, une enveloppe (1) de protection contre les radiations présente une zone de paroi (2a à 2z) constituée d'un béton (22a à 22z) de protection contre les radiations, qui comprend un premier agrégat renfermant du bore, présentant une grosseur de grain d'au maximum 1 mm, et un deuxième agrégat métallique, présentant une grosseur de grain d'au maximum 7 mm. Dans un premier mode de réalisation de l'invention, la teneur en premier agrégat renfermant du bore, du béton (22a) de protection contre les radiations s'élève à au moins 5,0 % en poids, en particulier au moins 7,8 % en poids. Le béton (22b) de protection contre les radiations présente, dans un deuxième mode de réalisation de l'invention, une teneur en deuxième agrégat métallique comprise entre 80 et 90 % en poids, en particulier entre 85 et 89 % en poids. La teneur en premier agrégat renfermant du bore peut alors se situer dans une plage comprise entre 1,0 et 1,5 % en poids.

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