Benchmark Experiment of Neutron Penetration through Iron and Concrete Shields for Hundreds-of-MeV Quasi-Monoenergetic Neutrons—I: Measurements of Neutron Spectrum by a Multimoderator Spectrometer

Yashima, Hiroshi; Iwase, Hiroshi; Hagiwara, Masayuki; Kirihara, Yoichi; Taniguchi, Shingo; Yamakawa, Hiroshi; Oishi, Koji; Iwamoto, Yosuke; Satoh, Daiki; Nakane, Yoshibumi; Nakashima, Hiroshi; Itoga, Toshiro; Nakao, Noriaki; Nakamura, Takashi; Tamii, A.; Hatanaka, K.

doi:10.13182/nt09-a9198

Cited by 7 publications

(7 citation statements)

References 10 publications

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“…At RCNP, iron and low-activation concretes were assembled with thicknesses of 10-100 cm for the iron shield and from 25 to 200 cm for the low-activation concrete shield. The densities of the iron and low-activation concrete were 7.87 and 2.33 g/cm 3 , respectively, and the atomic compositions of these shields are listed in a previous study [38,39].…”

Section: Shielding Experimentsmentioning

confidence: 97%

“…Neutron energy spectra that penetrated through concrete and iron-shield assemblies were measured at the cyclotron facility of the Takasaki Ion Accelerator for Advanced Radiation Research (TIARA) using a 68-MeV 7 Li(p,n) 7 Be monoenergetic neutron source (p-Li neutron source) [36,37], and it was measured at the cyclotron facility of Research Center for Nuclear Physics (RCNP), Osaka University, using an 138-MeV p-Li neutron source [38,39].…”

Section: Shielding Experimentsmentioning

confidence: 99%

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Benchmark study of the recent version of the PHITS code

Iwamoto

Sato

Hashimoto

et al. 2017

Journal of Nuclear Science and Technology

130

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We performed a benchmark study for 58 cases (22 cases reported in this paper and 36 cases reported in online as supplementary materials of this paper) using the recent version (version 2.88) of the Particle and Heavy-Ion Transport code System (PHITS) in the following fields: (1) particle production cross-sections for nuclear reactions from 20 MeV to 1 GeV, (2) thick-target neutron yields and neutron shielding, (3) depth-dose distribution in water using 12 C beam, and (4) electron and photon transportation over a wide-energy range from keV to GeV. Overall agreements were found to be sufficiently satisfactory; however, several discrepancies are observed, particularly in particle productions with energies below 100 MeV, neutron production for 7 Li(p,n) 7 Be, and photonuclear reactions. To overcome these inaccuracies and to further improve the code, it will be necessary to incorporate a high-energy version of the evaluated nuclear data library JENDL-4.0/HE and the photonuclear data file JENDL-PD in the PHITS package.

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Section: Shielding Experimentsmentioning

confidence: 97%

Section: Shielding Experimentsmentioning

confidence: 99%

Benchmark study of the recent version of the PHITS code

Iwamoto

Sato

Hashimoto

et al. 2017

Journal of Nuclear Science and Technology

130

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“…Adequate shielding designs are necessary for saving of the building costs as well as radiation safety issue. The shielding benchmark experiment using the p- 7 Li quasi-monoenergetic neutron sources have been performed for 40 and 65 MeV in Takasaki Ion Accelerators for Advanced Radiation Application (TIARA), Japan Atomic Research Agency [1,2] and for 137 MeV in the Research Center for Nuclear Physics (RCNP), Osaka University, Japan [3,4], because the data are very useful to investigate the attenuation length of monoenergetic neutrons and the accuracy of nuclear data libraries and nuclear reaction models implemented in the simulation codes used for accelerator shielding designs.…”

Section: Introductionmentioning

confidence: 99%

Shielding experiments of concrete and iron for the 244 MeV and 387 MeV quasi-mono energetic neutrons using an organic scintillator (at RCNP, Osaka Univ.)

et al. 2017

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A shielding benchmark experiment has been performed using a quasi-monoenergetic 7 Li(p,n) neutron source with the peak energies of 244 and 387 MeV at the Research Center for Nuclear Physics (RCNP) of Osaka University, in order to assess the accuracy of nuclear data and calculation codes used in high-energy accelerator shielging design. Energy spectra behind bulk shields of 10-to 100-cm-thick iron, 25-to 300-cm-thick concrete and their composite are measured using a NE213 organic liquid scintillator with a diameter and thickness of 25.4 cm each with a time-of-flight and an unfolding method. The neutron attenuation lengths are illustared for iron and concrete as a function of the incident energy.

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“…The shielding benchmark experiment using the p- 7 Li quasi-monoenergetic neutron sources have been performed for 40 and 65 MeV in Takasaki Ion Accelerators for Advanced Radiation Application (TIARA), Japan Atomic Research Agency [1] and for 137 MeV in the Research Center for Nuclear Physics (RCNP), Osaka University, Japan [2,3], because the *Corresponding author. Email: masayuki.hagiwara@kek.jp data are very useful to investigate the attenuation length of monoenergetic neutrons and the accuracy of nuclear data libraries and nuclear reaction models implemented in the simulation codes used for the shielding designs of accelerator facilities.…”

Section: Introductionmentioning

confidence: 99%

Shielding benchmark experiment using hundreds of MeV quasi-monoenergetic neutron source by a large organic scintillator

Hagiwara

Iwase

Iwamoto

et al. 2014

Progress in Nuclear Science and Technology

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A shielding benchmark experiment has been performed using a quasi-monoenergetic 7 Li(p,n) neutron source with 246 and 389 MeV protons at the Research Center for Nuclear Physics (RCNP) of Osaka University, in order to investigate the accuracy of nuclear data libraries and calculation codes for hundreds of MeV neutrons. Time-of-flight and energy spectra behind bulk shields of 10-to 100-cm-thick iron, 25-to 300-cm-thick concrete and their composite are measured using a NE213 organic liquid scintillator with a diameter and thickness of 25.4 cm each. A time-of-flight and an unfolding method are applied to obtain the energy spectra transmitted through the shields for the peak energy region and continuous energy region, respectively. The simulations with the PHITS code coupled with the JENDL-HE nuclear data library are performed for comparison with the measured data. The measured attenuation lengths of peak neutrons with energies of 244 and 387 MeV are in good agreement with the calculation result by the PHITS code within 6 %.

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Benchmark Experiment of Neutron Penetration through Iron and Concrete Shields for Hundreds-of-MeV Quasi-Monoenergetic Neutrons—I: Measurements of Neutron Spectrum by a Multimoderator Spectrometer

Cited by 7 publications

References 10 publications

Benchmark study of the recent version of the PHITS code

Benchmark study of the recent version of the PHITS code

Shielding experiments of concrete and iron for the 244 MeV and 387 MeV quasi-mono energetic neutrons using an organic scintillator (at RCNP, Osaka Univ.)

Shielding benchmark experiment using hundreds of MeV quasi-monoenergetic neutron source by a large organic scintillator

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