Flexible heat resistant neutron shielding resin

Sukegawa, Atsuhiko M.; Anayama, Yoshimasa; Okuno, Koichi; Sakurai, S.; Kaminaga, A.

doi:10.1016/j.jnucmat.2010.12.291

Cited by 26 publications

(7 citation statements)

References 7 publications

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“…Sato et al [18] proposed for a radioactive waste management a multilayered concrete structures with boron-doped low activation concrete wall. Here a flexible neutron shielding resin, recently developed by Sukegawa et al [19], could be used. This solution could be problematic in a reactor building construction due to the particularity of concrete works technology and problems that can arise at the interface like it happens in multilayer repair systems [20].…”

Section: Shielding Concrete Optimizationmentioning

confidence: 99%

Monte Carlo simulations for optimization of neutron shielding concrete

et al. 2012

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Concrete is one of the main materials used for gamma and neutron shielding. While in case of gamma rays an increase in density is usually efficient enough, protection against neutrons is more complex. The aim of this paper is to show the possibility of using the Monte Carlo codes for evaluation and optimization of concrete mix to reach better neutron shielding. Two codes (MCNPX and SPOT -written by authors) were used to simulate neutron transport through a wall made of different concretes. It is showed that concrete of higher compressive strength attenuates neutrons more effectively. The advantage of heavyweight concrete (with barite aggregate), usually used for gamma shielding, over the ordinary concrete was not so clear. Neutron shielding depends on many factors e.g. neutron energy, barrier thickness and atomic composition. All this makes a proper design of concrete as a very important issue for nuclear power plant safety assurance.

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Section: Shielding Concrete Optimizationmentioning

confidence: 99%

Monte Carlo simulations for optimization of neutron shielding concrete

et al. 2012

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“…Homogeneous dispersion and strong adhesion of nano-B 4 C and -BN with polymer matrix was reported, which contributed to enhanced mechanical properties and neutron shielding efficiency compared to their micro counterparts. Sukegawa et al 8 reported a flexible neutron shielding resin with good heat resistance. The obtained resin would be applied around the port of the vacuum vessel as an additional shielding material and reduce the neutron streaming from a superconducting tokamak device such as the JT-60SA.…”

Section: Introductionmentioning

confidence: 99%

Novel Neutron Shielding Alginate Based Aerogel with Extremely Low Flammability

Chen

Liu

et al. 2017

Ind. Eng. Chem. Res.

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Novel low-density neutron shielding materials were fabricated by incorporating boron compounds into aerogel via a freeze-drying method. The microstructure was investigated with scanning electron microscopy (SEM). The results revealed a mostly layered structure of both boron-containing aerogels and the control. The aerogel composites have mechanical properties comparable with rigid polyurethane (PU) foam. The obtained composites have a good neutron shielding effect, with shielding efficiency up to 99% (0.283 g/cm2). The neutron shielding efficiency is mainly determined by B content, which is also influenced by the components of the composites. Combustion parameters, including heat release rate (HRR), fire growth rate (FIGRA), total heat release (THR), and total smoke release (TSR), all indicate extremely low fire risk of the neutron shielding materials. The facile fabrication of the low-density boron-containing material makes it promising in neutron shielding applications.

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“…4 Due to lightweight shielding materials are preferred in mobile nuclear devices and manned spacecras, polymeric composites are particularly excellent candidates as shielding materials. [5][6][7][8] Neutron undergoes nuclear reaction with 10 B atom to produce a particle, 7 Li atom and g ray, which opens door for the preparation of materials with neutron-trapping ability. 9,10 Neutron shielding polymeric composites are currently prepared by blending boron-rich particles such as boron carbide and boron nitride with hydrogen-rich polymers such as epoxy resin, polyethylene and polypropylene.…”

Section: Introductionmentioning

confidence: 99%