New Sampling Method in Continuous Energy Monte Carlo Calculation for Pebble Bed Reactors
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概要
- 論文の詳細を見る
<BR>A pebble bed reactor generally has double heterogeneity consisting of two kinds of spherical fuel element. In the core, there exist many fuel balls piled up randomly in a high packing fraction. And each fuel ball contains a lot of small fuel particles which are also distributed randomly. In this study, to realize precise neutron transport calculation of such reactors with the continuous energy Monte Carlo method, a new sampling method has been developed. The new method has been implemented in the general purpose Monte Carlo code MCNP to develop a modified version MCNP-BALL. This method was validated by calculating inventory of spherical fuel elements arranged successively by sampling during transport calculation and also by performing criticality calculations in ordered packing models. From the results, it was confirmed that the inventory of spherical fuel elements could be reproduced using MCNP-BALL within a sufficient accuracy of 0.2%. And the comparison of criticality calculations in ordered packing models between MCNP-BALL and the reference method shows excellent agreement in neutron spectrum as well as multiplication factor. <BR>MCNP-BALL enables us to analyze pebble bed type cores such as PROTEUS precisely with the continuous energy Monte Carlo method.
- 社団法人 日本原子力学会の論文
- 1997-08-25
著者
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Masumori Naoya
札幌医科大学附属病院gidクリニック
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Mori Takamasa
Japan Atomic Energy Agency
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Mori Takamasa
Japan Atomic Energy Research Institute
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Miyamoto Naoya
Department Of Molecular Biology School Of Medicine University Of Occupational And Environmental Heal
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NAKAGAWA Masayuki
Japan Meteorological Agency
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Murata Isao
Department Of Earth And Planetary Physics Graduate School Of Science University Of Tokyo
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Murata Isao
Department Of Nuclear Engineering Osaka University
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Takahashi Akito
Department Of Nuclear Engineering Graduate School Of Osaka University
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Nakagawa Masayuki
Kagoshima Univ. Kagoshima Jpn
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Nakagawa M
Japan Atomic Energy Res. Inst.
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Nakagawa Masayuki
Department Of Anesthesiology Fukushima Medical University School Of Medicine
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Nakagawa Masayuki
Department Of Urology Kagoshima University Graduate School Of Medical And Dental Sciences
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Nakagawa Masayuki
Department Of Urology Kagoshima University Faculty Of Medicine
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Nakagawa Masayuki
Japan Atomic Energy Research Institute
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Takahashi Akito
Department Of Nuclear Engineering Graduate School Of Engineering Osaka University
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