Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
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：23.52(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.
Hori, Junichi; Sato, Satoshi; Yamauchi, Michinori*; Ochiai, Kentaro; Nishitani, Takeo
JAERI-Research 2003-002, 50 Pages, 2003/03
JAERI-Research-2003-002.pdf:2.21MB
D-T neutron irradiation experiments have been performed with F82H and ODS ferritic steels and the effective cross sections for 
Co productions in those materials via the sequential reactions were measured. The effective cross sections for F82H and ODS ferritic steels were about 1.5 times larger than that for iron. The distributions of effective cross sections were measured for 6 materials (iron, copper, vanadium, titanium, tungsten and lead) and F82H. The sequential reaction rates in the region close to hydrogen compound became over 20 times larger than that in material itself. In the case of F82H, the increase ratio was about 50. It was indicated that the activity for the sequential reaction product Co will reach to 3-10 
of that for primary neutron reaction product 
Mn aound the surface of a cooling pipe in a fusion reactor. The effective cross sections were estimated by using (n,xp), (p,n) reaction cross sections, proton emission spectra, proton stopping power in the material. The estimated values were compared with experimental results.
Hori, Junichi; Maekawa, Fujio; Wada, Masayuki*; Ochiai, Kentaro; Yamauchi, Michinori*; Morimoto, Yuichi*; Terada, Yasuaki; Klix, A.; Nishitani, Takeo
Fusion Engineering and Design, 63-64, p.271 - 276, 2002/12
Times Cited Count：2 Percentile：17.03(Nuclear Science & Technology)In order to the waste management method and the safety design of future D-T fusion reactor, it is important to consider the radioactivity productions via not only primary neutron reactions but also sequential charged particle reactions (SCPR). Especially, on the surface of a coolant channel many recoiled protons are generated by the neutron irradiation with coolant water, so it is apprehensive that the undesirable radioactive nuclide production yields via SCPR are enhanced. In this work, the laminated sample pieces of fusion material foils (V, Fe, W, Ti, Pb, Cu) were made and attached on a polyethylene board to simulate water flowing inside a coolant channel. They were irradiated with D-T neutrons. The effective radioactivity cross section and the depth distribution of the radioactivity production yields due to SCPR were obtained for each material. On the other hand, the estimated values were compared with the experimental ones.
Matsubayashi, Masahito; Hibiki, Takashi*; Mishima, Kaichiro*; Yoshii, Koji*; Okamoto, Koji*
Nuclear Instruments and Methods in Physics Research A, 463(1-2), p.324 - 330, 2001/05
Times Cited Count：17 Percentile：73.21(Instruments & Instrumentation)no abstracts in English
Nishitani, Takeo; Kasai, Satoshi; Iguchi, Tetsuo*; *; Ebisawa, Katsuyuki*; *
Review of Scientific Instruments, 68(1), p.565 - 568, 1997/01
Times Cited Count：5 Percentile：46.16(Instruments & Instrumentation)no abstracts in English
Meigo, Shinichiro
Nuclear Instruments and Methods in Physics Research A, 401, p.365 - 378, 1997/00
Times Cited Count：60 Percentile：95.79(Instruments & Instrumentation)no abstracts in English
Nishitani, Takeo; Iguchi, Tetsuo*; Ebisawa, Katsuyuki*; *; Kasai, Satoshi
JAERI-Tech 96-038, 29 Pages, 1996/09
no abstracts in English
Nishitani, Takeo; Iguchi, Tetsuo*; *; Kaneko, Junichi; Kasai, Satoshi; Matoba, Toru
Proc., Workshop on Diagnostics for Experimental Thermonuclear Fusion Reactors, 0, p.425 - 434, 1996/00
no abstracts in English
Konno, Chikara; Maekawa, Fujio; Oyama, Yukio; Ikeda, Yujiro; Maekawa, Hiroshi
Fusion Engineering and Design, 28, p.745 - 752, 1995/00
no abstracts in English
Maekawa, Hiroshi; Oyama, Yukio; Tanaka, Shunichi
Proc. of the Topical Meeting on New Horizons in Radiation Protection and Shielding, p.611 - 618, 1992/00
no abstracts in English
Konno, Chikara; Ikeda, Yujiro; Kosako, Kazuaki; Oyama, Yukio; Maekawa, Hiroshi; Nakamura, Tomoo; Bennett, E. F.*
Fusion Engineering and Design, 18, p.297 - 303, 1991/12
Times Cited Count：16 Percentile：83.01(Nuclear Science & Technology)no abstracts in English
; *
JAERI-M 8919, 44 Pages, 1980/07
no abstracts in English
Journal of Nuclear Science and Technology, 17(6), p.471 - 473, 1980/00
Times Cited Count：0 Percentile：0.29(Nuclear Science & Technology)no abstracts in English
JAERI-M 8327, 55 Pages, 1979/07
no abstracts in English
; ;
Journal of Nuclear Science and Technology, 16(5), p.329 - 343, 1979/05
Times Cited Count：3no abstracts in English
