Accession Number : ADA303210

Title :   An Evaluation of Three Partially Volatile Neutron Shields for High-Performance Shipping Casks.

Corporate Author : SANDIA CORP ALBUQUERQUE NM

Personal Author(s) : Rack, H. J. ; Pearson, H. S.

PDF Url : ADA303210

Report Date : FEB 1981

Pagination or Media Count : 42

Abstract : The thermal stability and mechanical behavior of three partially volatile candidate neutron shield materials have been evaluated. The results indicate that silicone based rubbers, impregnated with elemental boron or boron carbide, Boro-silicone 236 and Bisco NS-I respectively are more thermally stable than are borated beechwoods, e.g., Permali JN. Mechanical property measurements indicated however that the compressive strength of the borated beechwood is 10 to 48 times higher than that of the silicone based rubbers. The compressive strengths of the borated beechwood and boron carbide impregnated silicone rubber were substantially more sensitive to test temperature than was the compressive strength of the boron impregnated silicone rubber. Finally the compressive strengths and energy absorbing capability of the boron impregnated silicone rubber is not affected by prior thermal exposure at 425 K for 1000h.

Descriptors :   *BORON CARBIDES, *BORON, *NEUTRON ABSORBERS, THERMAL PROPERTIES, THERMAL STABILITY, VOLATILITY, COMPRESSIVE STRENGTH, SHIPPING CONTAINERS, SILICONES, SYNTHETIC RUBBER, IMPREGNATION.

Subject Categories : Nuclear Radiation Shield, Protection & Safety

Distribution Statement : APPROVED FOR PUBLIC RELEASE