±á´Ç±ô³Ù¾±³Ù±ðâ„¢ is the trademarked name of °ÄÃÅÁùºÏ²Ê¿ª½±½á¹û2023’s proprietary neutron shield material that is used for absorbing thermalized neutrons in a neutron-emitting environment. Holtite was first used in the fleet of °ÄÃÅÁùºÏ²Ê¿ª½±½á¹û2023’s HI-STAR 100 casks built by °ÄÃÅÁùºÏ²Ê¿ª½±½á¹û2023 in the late 1990s. Since then ±á´Ç±ô³Ù¾±³Ù±ðâ„¢ has been the neutron shield of choice in °ÄÃÅÁùºÏ²Ê¿ª½±½á¹û2023’s transportation and transfer casks and even a vertical ventilated cask (HI-STORM MIC) to reduce the neutron dose to infinitesimal levels adjacent to the cask.
All ±á´Ç±ô³Ù¾±³Ù±ðâ„¢ formulations consist of a hydrogen rich polymer impregnated with uniformly dispersed boron carbide particles. The operating temperature and thermal conductivity requirements determine which of the several qualified formulations of ±á´Ç±ô³Ù¾±³Ù±ðâ„¢ (denoted as Holtite A, Holtite B, etc.) should be used. The selection of the optimal ±á´Ç±ô³Ù¾±³Ù±ðâ„¢ formulation from among those qualified by extensive testing is guided by the competing considerations of temperature tolerance (thermal stability) and thermal conductivity.
In addition to casks, ±á´Ç±ô³Ù¾±³Ù±ðâ„¢ can be used in any nuclear application that entails capture of neutrons. Potential applications outside of used fuel devices in commercial nuclear and defense plants include reprocessing and enrichment facilities.
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