Refine your search:     
Report No.
 - 
Search Results: Records 1-20 displayed on this page of 31

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Semi-empirical formula for $$gamma$$-ray streaming through bend duct with arbitrary flexion angles

Matsuda, Norihiro; Sasamoto, Nobuo

Radiation Protection Dosimetry, 140(3), p.211 - 217, 2010/08

 Times Cited Count:1 Percentile:10.69(Environmental Sciences)

Semi-empirical formulas for the duct streaming of $$gamma$$-rays are useful as ever for application to practical shielding designs. Based on the algorithm of the DIN's formula, a new semi-empirical formula has been developed. Major improvements are the re-definition of the duct leg region, introduction of the $$gamma$$-ray energy dependent total dose albedo and formulation for the bend duct with arbitrary flexion angles. Validity of the formula was verified through benchmark analyses of $$gamma$$-ray streaming through three-legged duct with rectangular bend and the one with the flexion angle of 137$$^{circ}$$.

Journal Articles

Radiation safety design for the J-PARC project

Nakashima, Hiroshi; Nakane, Yoshihiro; Masukawa, Fumihiro; Matsuda, Norihiro; Oguri, Tomomi*; Nakano, Hideo*; Sasamoto, Nobuo*; Shibata, Tokushi*; Suzuki, Takenori*; Miura, Taichi*; et al.

Radiation Protection Dosimetry, 115(1-4), p.564 - 568, 2005/12

 Times Cited Count:8 Percentile:50.68(Environmental Sciences)

The High Intensity Proton Accelerator Project, named as J-PARC, is in progress, aiming at studies on the latest basic science and the advancing nuclear technology. In the project, the high-energy proton accelerator complex of the world highest intensity is under construction. In order to establish a reasonable shielding design, both simplified and detailed design methods were used in the shielding design of J-PARC. This paper reviews the present status of the radiation safety design study for J-PARC.

JAEA Reports

Example of answers to the problems of the 36th examination for the chief engineer of nuclear fuel, 2004

Yachi, Shigeyasu; Nakamura, Jinichi; Amaya, Masaki; Nakajima, Kunihisa; Komuro, Yuichi; Nakajima, Katsuaki*; Kobayashi, Yasuhiko; Sato, Tadashi*; Suga, Shinichi*; Noguchi, Hiroshi; et al.

JAERI-Review 2004-020, 61 Pages, 2004/09

JAERI-Review-2004-020.pdf:1.85MB

This report provides an example of answers to the problems of the 36th Examination for the Chief Engineer of Nuclear Fuel. This examination was done as a national qualification in March 2004. Brief explanations or references are added to some answers.

Journal Articles

Benchmark analyses of neutron streaming experiments for proton accelerator facilities

Nakano, Hideo*; Masukawa, Fumihiro; Nakashima, Hiroshi; Sasamoto, Nobuo*; Tayama, Ryuichi*; Handa, Hiroyuki*; Hayashi, Katsumi*

Journal of Nuclear Science and Technology, 41(Suppl.4), p.50 - 53, 2004/03

In order to estimate accuracy of the various calculation methods for the neutron streaming through a maze and duct in proton accelerator facilities, we performed benchmark analyses by using the radiation shielding design codes. According to the results of the benchmark analyses, it is concluded that NMTC/MCNP, MCNPX and DUCT-III are applicable to actual calculation of the duct-streaming radiations for J-PARC.

Journal Articles

A Study on induced activity in the low-activationized concrete for J-PARC

Matsuda, Norihiro; Nakashima, Hiroshi; Kasugai, Yoshimi; Sasamoto, Nobuo*; Kinno, Masaharu*; Kitami, Takayuki; Ichimura, Takahito; Hori, Junichi*; Ochiai, Kentaro; Nishitani, Takeo

Journal of Nuclear Science and Technology, 41(Suppl.4), p.74 - 77, 2004/03

In high power proton accelerator facilities, concrete shield can be highly activated, which makes maintenance work quite difficult. So, a low-activationized concrete (limestone concrete) is to be partially adopted as a concrete shield for Japan Proton Accelerator Research Complex (J-PARC) aiming at reducing $$gamma$$-ray exposure dose during maintenance period. A new quantity, $$^{24}$$Na-equivalent, was introduced as a criterion to assure effectiveness of the low-activationized concrete. In order of its verification, powdered low-activationized concrete and ordinary one were irradiated using FNS at JAERI. The measurements were analyzed by a shielding design code system being used for J-PARC, showing that the calculations reproduce the measured induced activity within a factor of 2. Furthermore, by using the same code system, $$gamma$$-ray exposure dose was calculated for the configuration of J-PARC to find out that $$gamma$$-ray exposure dose by the low-activationized concrete was about 10 times lower than that by the ordinary concrete in a period of less than a few days after operation.

Journal Articles

Analyses of streamed neutron spectra at TIARA using DUCT-III

Masukawa, Fumihiro; Nakano, Hideo*; Nakashima, Hiroshi; Sasamoto, Nobuo; Tayama, Ryuichi*; Hayashi, Katsumi*; Shin, Kazuo*

Journal of Nuclear Science and Technology, 41(Suppl.4), p.46 - 49, 2004/03

A simple design code for duct-streaming radiations, DUCT-III was applied to the analyses of the streamed neutron spectra measured at TIARA labyrinth with two bends. The code satisfactorily reproduced the measured neutron energy spectra and the Monte Carlo calculations, except that every calculation overestimated the measured thermal components by factor of 2 or 3.

JAEA Reports

Verification of the DUCT-III for calculation of high energy neutron streaming

Masukawa, Fumihiro; Nakano, Hideo*; Nakashima, Hiroshi; Sasamoto, Nobuo; Tayama, Ryuichi*; Handa, Hiroyuki*; Hayashi, Katsumi*; Hirayama, Hideo*; Shin, Kazuo*

JAERI-Tech 2003-018, 42 Pages, 2003/03

JAERI-Tech-2003-018.pdf:1.7MB

no abstracts in English

JAEA Reports

Evaluation of energy response of neutron rem monitor applied to high-energy accelerator facilities

Nakane, Yoshihiro; Harada, Yasunori; Sakamoto, Yukio; Oguri, Tomomi*; Yoshizawa, Michio; Takahashi, Fumiaki; Ishikura, Takeshi*; Fujimoto, Toshiaki*; Tanaka, Susumu; Sasamoto, Nobuo

JAERI-Tech 2003-011, 37 Pages, 2003/03

JAERI-Tech-2003-011.pdf:1.73MB

no abstracts in English

Journal Articles

Evaluation of radioactivity at accelerator tunnels for high-intensity proton accelerator facility

Nakane, Yoshihiro; Masukawa, Fumihiro; Oguri, Tomomi*; Nakashima, Hiroshi; Abe, Teruo*; Sasamoto, Nobuo

Journal of Nuclear Science and Technology, 39(Suppl.2), p.1260 - 1263, 2002/08

no abstracts in English

Journal Articles

Status on shielding design study for the high-intensity proton accelerator facility

Sasamoto, Nobuo; Nakashima, Hiroshi; Hirayama, Hideo*; Shibata, Tokushi*

Journal of Nuclear Science and Technology, 39(Suppl.2), p.1264 - 1267, 2002/08

no abstracts in English

Journal Articles

Analyses of high energy neutron streaming experiments using DUCT-III

Masukawa, Fumihiro; Nakashima, Hiroshi; Sasamoto, Nobuo; Nakano, Hideo*; Tayama, Ryuichi*

Journal of Nuclear Science and Technology, 39(Suppl.2), p.1268 - 1271, 2002/08

no abstracts in English

JAEA Reports

Simplified shield calculation system for high-intensity proton accelerators

Masumura, Tomomi*; Nakashima, Hiroshi; Nakane, Yoshihiro; Sasamoto, Nobuo

JAERI-Data/Code 2000-026, 40 Pages, 2000/06

JAERI-Data-Code-2000-026.pdf:7.21MB

no abstracts in English

Journal Articles

Estimation of activity and dose distributions around a proton linac induced by beam spill

Nakashima, Hiroshi; Sasamoto, Nobuo; Sakamoto, Yukio; Kusano, Joichi; Hasegawa, Kazuo; Handa, Hiroyuki*; Hayashi, Katsumi*; Yamada, Kobun*; Abe, Teruo*

Journal of Nuclear Science and Technology, 37(Suppl.1), p.870 - 874, 2000/03

no abstracts in English

Journal Articles

Characteristics of shielding design calculation for the SPring-8 synchrotron radiation beamlines

Asano, Yoshihiro; Sasamoto, Nobuo

Radiation Protection Dosimetry, 82(3), p.167 - 174, 1999/00

 Times Cited Count:8 Percentile:54.48(Environmental Sciences)

no abstracts in English

JAEA Reports

Radiation shielding and safety analysis for SPring-8

Asano, Yoshihiro; Sasamoto, Nobuo

JAERI-Tech 98-009, 90 Pages, 1998/03

JAERI-Tech-98-009.pdf:3.29MB

no abstracts in English

JAEA Reports

Development of PC version code system for radiation dose estimation

Harada, Yasunori; Sasamoto, Nobuo; Sakamoto, Yukio; Kurosawa, Naohiro*; *

JAERI-Data/Code 97-013, 196 Pages, 1997/03

JAERI-Data-Code-97-013.pdf:4.59MB

no abstracts in English

Journal Articles

Shielding design calculation of SPring-8 insertion device beamline

Asano, Yoshihiro; Sasamoto, Nobuo

IRPA9: 1996 International Congress on Radiation Protection, Proceedings, p.4_582 - 4_585, 1996/04

no abstracts in English

Journal Articles

Measurement of glass dosimeter response for low energy photon using synchrotron radiation

Asano, Yoshihiro; Sasamoto, Nobuo; Nakane, Yoshihiro; Nakashima, Hiroshi; Sakamoto, Yukio; Tanaka, Shunichi; Namito, Yoshihito*; Ban, Shuichi*; Hirayama, Hideo*; Nariyama, Nobuteru*

IRPA9: 1996 International Congress on Radiation Protection, Proceedings, p.4_253 - 4_255, 1996/00

no abstracts in English

Journal Articles

Compton scattering of 20- to 40-keV photons

Namito, Yoshihito*; Ban, Shuichi*; Hirayama, Hideo*; Nariyama, Nobuteru*; Nakashima, Hiroshi; Nakane, Yoshihiro; Sakamoto, Yukio; Sasamoto, Nobuo; Asano, Yoshihiro; Tanaka, Shunichi

Physical Review A, 51(4), p.3036 - 3043, 1995/04

A1995-0091.pdf:0.43MB

 Times Cited Count:53 Percentile:91.18(Optics)

no abstracts in English

JAEA Reports

Benchmark problems for intermediate and high energy accelerator shielding

; Sakamoto, Yukio; Tanaka, Shunichi; ; Fukahori, Tokio; ; Sasamoto, Nobuo; Tanaka, Susumu; Nakamura, Takashi*; Shin, Kazuo*; et al.

JAERI-Data/Code 94-012, 90 Pages, 1994/09

JAERI-Data-Code-94-012.pdf:2.26MB

no abstracts in English

31 (Records 1-20 displayed on this page)