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Endo, Akira
Radiation Protection Dosimetry, 200(13), p.1266 - 1273, 2024/08
Times Cited Count：0 Percentile：0.00(Environmental Sciences)This study examines the relationship between ambient dose 
, ambient dose equivalent 
, and effective dose for external neutron irradiation over 163 operational spectra from different workplaces. The results show that provides a reasonable estimate with a controlled margin, even if overestimated, to assess effective dose compared with , which can lead to a significant overestimation or underestimation of effective dose depending on the neutron spectra. The results highlight the limitations of and the superiority of in estimating effective dose according to the requirements of the operational quantity, especially in environments with high-energy neutrons.
Saegusa, Jun; Tanimura, Yoshihiko; Yoshizawa, Michio; Yoshida, Makoto
Radiation Protection Dosimetry, 110(1-4), p.91 - 95, 2004/09
Times Cited Count：5 Percentile：28.05(Environmental Sciences)For the accurate estimation of neutron dose equivalents, it is important to calibrate dosemeters in the field whose energy spectrum is similar to that in the workplace. For the purpose, studies are made toward the built of the spectrum changeable neutron calibration fields with the Van-de-Graff accelerator in the FRS in JAERI. The fields are produced by bombarding proton or deuteron beam from the accelerator to suitable targets surrounded by quasi-cylindrical moderators and absorbers of various materials. In the fields, neutron spectra with wide range energy index should be provided with sufficient fluence rate for the calibration of dosemeters. The objectives and conceptual design of the fields are discussed here, followed by the test simulation results of neutron spectra produced by various arrangements of a target and moderators.
Yoshizawa, Michio; Tanimura, Yoshihiko; Saegusa, Jun; Nemoto, Hisashi*; Yoshida, Makoto
Radiation Protection Dosimetry, 110(1-4), p.81 - 84, 2004/09
Times Cited Count：3 Percentile：22.33(Environmental Sciences)The facility of Radiation Standards (FRS) of JAERI has equipped with the concrete-moderated neutron calibration fields as simulated workplace neutron fields. The fields use an Am-Be (37GBq) neutron source placed in the narrow space surrounded by concrete wall and bricks to produce scattered neutrons. The neutron spectra of the fields were measured with Bonner multi-sphere spectrometer system (BMS), spherical recoil-proton proportional counters (RPCs), and a liquid scintillation counter (NE-213). The results were compared with each other, and the neutron spectra and the ambient dose equivalent rate, 
(10), were agreed well within the uncertainty. The angular distributions of neutron fluence were calculated by the MCNP-4B2 Monte Carlo code to obtain the reference personal dose equivalent rate, 
(10). The calculated results show that the scattered neutrons have a wide variety of incident angles. The reference (10) values considered the angular distribution were found to be 10-18% smaller than those without consideration.
Nakamura, Takemi*; Tonoike, Kotaro; Miyoshi, Yoshinori
Radiation Protection Dosimetry, 110(1-4), p.483 - 486, 2004/09
Times Cited Count：2 Percentile：16.43(Environmental Sciences)Dose measurement and evaluation technique in criticality accident conditions with a thermo luminescence dosimeter (TLD) was studied at the Transient Experiment Critical Facility (TRACY) of Japan Atomic Energy Research Institute (JAERI). The tissue absorbed dose can be derived from the ambient dose equivalent given by measurement with a TLD using the conversion factor given by computation. Using this technique, the neutron dose around the SILENE reactor of the Institute for Radioprotection and Nuclear Safety (IRSN) of France was measured in the Accident Dosimetry Intercomparison Exercise (June 10-21, 2002) organized by OECD/NEA and IRSN. In this exercise, the 
dose was also measured with a TLD. In this report, measurements and evaluation results at TRACY and SILENE are presented.
Sakamoto, Yukio
JAERI-Research 2002-025, 34 Pages, 2002/11
JAERI-Research-2002-025.pdf:1.91MB
no abstracts in English
Li(p,n) reactionNakao, Noriaki*; Nakashima, Hiroshi; Nakao, Makoto*; Sakamoto, Yukio; Nakane, Yoshihiro; ; Tanaka, Shunichi; Nakamura, Takashi*
JAERI-Data/Code 98-013, 46 Pages, 1998/03
JAERI-Data-Code-98-013.pdf:2.14MB
no abstracts in English
Li(p,n) reactionNakao, Noriaki*; Nakashima, Hiroshi; Sakamoto, Yukio; Nakane, Yoshihiro; Tanaka, Shunichi; ; Nakamura, Takashi*; Shin, Kazuo*;
JAERI-Data/Code 97-020, 46 Pages, 1997/06
JAERI-Data-Code-97-020.pdf:1.53MB
no abstracts in English
JAERI-Data/Code 96-020, 45 Pages, 1996/06
JAERI-Data-Code-96-020.pdf:1.1MB
no abstracts in English
Li(P,n) reaction; Nakao, Noriaki*; Tanaka, Shunichi; Nakamura, Takashi*; Shin, Kazuo*; Tanaka, Susumu; Meigo, Shinichiro; Nakane, Yoshihiro; Takada, Hiroshi; Sakamoto, Yukio; et al.
JAERI-Data/Code 96-005, 46 Pages, 1996/03
JAERI-Data-Code-96-005.pdf:1.54MB
no abstracts in English
; Sakamoto, Yukio; Tanaka, Shunichi
JAERI-Data/Code 95-004, 64 Pages, 1995/06
JAERI-Data-Code-95-004.pdf:1.55MB
no abstracts in English
Sakamoto, Yukio; Tanaka, Shunichi; ; W.Pairsuwan*; Yoshizawa, Nobuaki*; ; Furihata, Shiori*; Uehara, Takashi*; Iwai, Satoshi*
JAERI-Conf 95-007, 0, p.48 - 56, 1995/03
no abstracts in English
; Tanaka, Shunichi; Sakamoto, Yukio; Nakane, Yoshihiro;
JAERI-Data/Code 94-003, 70 Pages, 1994/08
JAERI-Data-Code-94-003.pdf:3.31MB
no abstracts in English
; Sakamoto, Yukio; Nakane, Yoshihiro; ;
JAERI-Data/Code 94-004, 76 Pages, 1994/07
JAERI-Data-Code-94-004.pdf:2.26MB
no abstracts in English
; Furihata, Shiori*; Uehara, Takashi*; Yoshizawa, Nobuaki*; Iwai, Satoshi*; Tanaka, Shunichi; Sakamoto, Yukio
JAERI-M 93-147, 90 Pages, 1993/07
no abstracts in English
; Uehara, Takashi*; ; Iwai, Satoshi*; Tanaka, Shunichi
JAERI-M 92-126, 88 Pages, 1992/09
no abstracts in English
; Tanaka, Shunichi
JAERI-M 91-148, 37 Pages, 1991/09
no abstracts in English
; Tanaka, Shunichi
JAERI-M 90-174, 126 Pages, 1990/10
no abstracts in English
