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2003 Fiscal Year Final Research Report Summary

Deep penetration and activation studies using the high energy neutron field

Research Project

Project/Area Number 14550054
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied physics, general
Research InstitutionThe High Energy Accelerator Research Organization

Principal Investigator

NAKAO Noriaki  High Energy Accelerator Research Organization, Radiation Science Center, Research Associate, 放射線科学センター, 助手 (80272524)

Co-Investigator(Kenkyū-buntansha) BAN Syuichi  High Energy Accelerator Research Organization, Radiation Science Center, Professor, 放射線科学センター, 教授 (70141976)
MIURA Taichi  High Energy Accelerator Research Organization, Radiation Science Center, Assistant Professor, 放射線科学センター, 助教授 (80209717)
NUMAJIRI Masaharu  High Energy Accelerator Research Organization, Radiation Science Center, Research Associate, 放射線科学センター, 助手 (20189385)
KAWAI Masayoshi  High Energy Accelerator Research Organization, Institute of Materials Structure Science, Professor, 物質構造科学研究所, 教授 (10311127)
SANAMI Toshiya  High Energy Accelerator Research Organization, Radiation Science Center, Research Associate, 放射線科学センター, 助手 (90321538)
Project Period (FY) 2002 – 2003
Keywordsspallation neutron / concrete shield / neutron field / activation detector / shielding experiment / deep penetration / Monte Carlo / モンテカルロ
Research Abstract

An irradiation room for a high-energy neutron field was arranged at the KENS spallation neutron source facility for studies of shielding, activation and radiation damage of materials. In this room, a high-energy neutron source produced in the forward direction from a thick tungsten target bombarded by 500-MeV protons is available. An ordinary concrete shield of 4-m-thickness was newly assembled in the room in contact with the beam exit located 2.5-m downstream from the target center. Activation detectors of bismuth, aluminum, indium and gold foils were inserted into 8 slots inside the shield, and attenuations of neutron reaction rates were obtained by measurements of □-rays from the activation detectors.
A Monte-Carlo simulation using the MARS 14 code was also performed, and comparisons between the calculations and measurements show good agreements within a factor of 2. This experimental data will be useful as benchmark data to check the accuracies of the transmission calculation codes and shielding parameters for deep penetration.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 八島浩, 中尾徳晶: "KENS遮蔽実験における放射化検出器の中性子反応率データ解析"KEK-Internal. 2003-10. (2004)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Nakao et al.: "Shielding Experiment at the High Energy Neutron Beam Course of KENS"Proc.16th Meeting of the International Collaboration on Advanced Neutron Sources (ICANS-XVI),May 12-15,2003,Dusseldorf-Neuss, Germany, KEK Preprint 2003-15 (2003).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Nakao et al.: "KENS Shielding Experiment (1)-Measurement of Neutron Attenuation through 4m Concrete Shield Using a High Energy Neutron Irradiation Room"Proc.The 2ns iTRS International Symposium on Radiation Safety and Detection Technology (ISORD-2),Tohoku University, Sendai, Japan, July 24-25,2003.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Q.Wang et al.: "KENS Shielding Experiment (2):Measurement of the Neutron Spatial Distribution inside and outside of a Concrete Shield using an Activation Foil and an Imaging Plate Technique"Proc.The 2ns iTRS International Symposium on Radiation Safety and Detection Technology (ISORD-2),Tohoku University, Sendai, Japan, July 24-25,2003.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 中尾徳晶 他: "核破砕中性子源施設KENSにおける高エネルギー中性子のコンクリート遮蔽体深層透過実験"日本原子力学会2003年春の年会要旨集. D47. 148 (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 大石晃嗣 他: "核破砕中性子源施設KENSにおけるコンクリート放射化実験及びその評価"日本原子力学会2003年秋の年会要旨集. B40. (2003)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Yashima, N.Nakao: "Data Analysis for Neutron Reaction Rates of Activation Detectors in KENS Shielding Experiment -Experiment on January 2003"KEK-internal. 2003-10. (2004)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Nakao, H.Yashima, M.Kawai, K.Oishi, H.Nakashima, S.Sasaki, K.Masumoto, M.Numajiri, T.Sanami, K.Takahashi, A.Toyoda, K.Iijima, Q.Wang, S.Ban, H.Hirayama, S.Muto, T.Nunomiya, S.Yonai, D.R.H.Rasolonjatovo, K.Terunuma, T.Nakamura, A.Maruhashi: "Shielding Experiment at the High Energy Neutron Beam Course of KENS"Proc. 16th Meeting of the International Collaboration on Advanced Neutron Sources(ICANS-XVI), May 12-15, 2003 Dusseldorf-Neuss, Germany, and KEK. 2003-15(Preprint). (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Nakao, H.Yashima, M.Kawai, K.Oishi, H.Nakashima, S.Sasaki, K.Masumoto, M.Numajiri, T.Sanami, H.Matsumura, Q.Wang, A.Toyoda, K.Iijima, K.Takahashi, S.Ban, H.Hirayama, S.Muto, T.Nunomiya, S.Yonai, D.R.H.Rasolonjatovo, K.Terunuma, T.Nakamura, E.Kim, K.Sarkar, A.Maruhashi: "KENS Shielding Experiment (1) -Measurement of Neutron Attenuation through 4m Concrete Shield Using a High Energy Neutron Irradiation Room"Proc.The 2ns iTRS International Symposium on Radiation Safety and Detection Technology (ISORD-2), Tohoku University, Sendai, JAPAN, July 24-25,2003.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Q.Wang, K.Masumoto, A.Toyoda, N.Nakao, M.Kawai, T.Shibata: "KENS Shielding Experiment (2): Measurement of the Neutron Spatial Distribution inside and outside of a Concrete Shield using an Activation Foil and an Imaging Plate Technique"Proc.The 2ns iTRS International Symposium on Radiation Safety and Detection Technology(ISORD-2), Tohoku University, Sendai, JAPAN, July 24-25,2003.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Nakao et al.: "Deep penetration experiment of concrete shielding using high energy neutrons at KENS neutron spallation source facility"Abstracts of 2003 Annual Meeting of the Atomic Energy Society of Japan. C47. 148 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Oishi et al.: "Measurements and Analysis of Induced Activations in Concrete using High Energy Neutrons at KENS Neutron Spallation Source Facility"Abstracts of 2003 Fall Annual Meeting of the Atomic Energy Society of Japan. B40. (2003)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2005-04-19  

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