Shielding efficiency of metal hydrides and borohydrides in fusion reactors
Mass attenuation coefficients, mean free paths and exposure buildup factors have been used to characterize the shielding efficiency of metal hydrides and borohydrides, with high density of hydrogen. Gamma ray exposure buildup factors were computed using five-parameter geometric progression...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
VINCA Institute of Nuclear Sciences
2016-01-01
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| Series: | Nuclear Technology and Radiation Protection |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1451-3994/2016/1451-39941604339S.pdf |
| Summary: | Mass attenuation coefficients, mean free paths and exposure buildup factors
have been used to characterize the shielding efficiency of metal hydrides and
borohydrides, with high density of hydrogen. Gamma ray exposure buildup
factors were computed using five-parameter geometric progression fitting at
energies 0.015 MeV to15 MeV, and for penetration depths up to 40 mean free
paths. Fast-neutron shielding efficiency has been characterized by the
effective neutron removal cross-section. It is shown that ZrH2 and VH2 are
very good shielding materials for gamma rays and fast neutrons due to their
suitable combination of low- and high-Z elements. The present work should be
useful for the selection and design of blankets and shielding, and for dose
evaluation for components in fusion reactors. |
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| ISSN: | 1451-3994 1452-8185 |