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Chatani, Keiji; ; ; ; *; *; *
PNC TN9410 92-076, 348 Pages, 1992/03
JASPER (Japanese American Shielding Program of Experimental Researches) is the cooperative research program between PNC and US-DOE using TSF (Tower Shielding Facility) in ORNL (Oak Ridge National Laboratory) as the experiment facility. This report summarizes the works in FY'1991 as follows; Planning the experiment configuration for JASPER Program, Analyses of the JASPER Program experiment, Analyses of the former TSF experiment, and Development of the methods for FBR shielding analyses. (1)Analyses of the JASPER Program Experiment In FY'1991 Axial shield Experiment data were mainly analyzed, and some of In-vessel Fuel Storage (IVS) Experiment data were also analyzed. The Fast Reactor Shielding Analysis System developed by PNC has been applied to the analyses for JASPER Program experiments. (Axial Shield Experiment Analysis) Axial Shield Experiment was conducted from August 1990 through December 1990 as part of a continuing series of eight experimennts planned for the JASPER Program. The experiment serves not only to provide data for the verification of analysis system in calculating the neutron streaming in each design, but also to provide a basis for determining the shielding effectiveness of stainless steel (SS) and boron carbide (B
C). four types of experimental configuration were used. The conclusions of the analyses are as follows: (a)For the spectrum modifier which provides a spectrum of neutron representative of those incident on the axial shield for the FBR core, the two-dimensional calculation showed good agreement with the experimental data. It was confirmed that the two-dimensional calculation could estimate the experimental data with almost the same accuracy as in the analyses for the Radial shield Attenuation and the Fission Gas Plenum Experiments. (b)For the homogeneous mockups, the two-dimensional ealculation could give the good agreement with the experimental data. (c)For the central blockage type mockups, in which the coolant flows ...
神谷 潤一郎
小泉 欧児*; 那須 昌吾*
JP, 2019-535716 
Patent licensing information Patent publication (In Japanese)
【課題】従来よりも軽量で設置の制約が小さく、高エネルギー領域の放射線に対しても優れた遮蔽率を有する放射線遮蔽材を提供する。 【解決手段】本発明の放射線遮蔽材は、繊維状ナノカーボン材料と、第1の放射線遮蔽粒子と、バインダーを含む複合体を備える放射線遮蔽材において、記繊維状ナノカーボン材料及び前記第1の放射線遮蔽粒子が前記バインダーに分散されてなる。【発明の効果】本発明に係る放射線遮蔽材は、従来よりも軽量で設置の制約が小さく、高エネルギー領域の放射線に対しても優れた遮蔽率を有する。