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Shinohara, Masanori; Ishitsuka, Etsuo; Shimazaki, Yosuke; Sawahata, Hiroaki
JAEA-Technology 2016-033, 65 Pages, 2017/01
JAEA-Technology-2016-033.pdf:11.14MB
To reduce the neutron exposure dose for workers during the replacement works of the startup neutron sources of the High Temperature Engineering Test Reactor, calculations of the exposure dose in case of temporary neutron shielding at the bottom of fuels handling machine were carried out by the PHITS code. As a result, it is clear that the dose equivalent rate due to neutron radiation can be reduced to about an order of magnitude by setting a temporary neutron shielding at the bottom of shielding cask for the fuel handling machine. In the actual replacement works, by setting temporary neutron shielding, it was achieved that the cumulative equivalent dose of the workers was reduced to 0.3 man mSv which is less than half of cumulative equivalent dose for the previous replacement works; 0.7 man mSv.
Morioka, Atsuhiko; Sakurai, Shinji; Okuno, Koichi*; Tamai, Hiroshi
Purazuma, Kaku Yugo Gakkai-Shi, 81(9), p.645 - 646, 2005/09
A 300 
C heat-resistant neutron shielding material is newly developed, which consists of phenol-based resin with 5 weight-% boron. The neutron shielding performance of the developed resin, examined by the 
Cf neutron source, is almost the same as that of the polyethylene. The resin is applicable to the port section of vacuum vessel of the DD plasma device to suppress the streaming neutrons and to reduce the nuclear heating of the superconducting coils.
Yoshizawa, Michio
Hokeikyo Nyusu, (29), p.2 - 5, 2002/05
no abstracts in English
G.D.Spriggs*; R.D.Busch*; Sakurai, Takeshi; Okajima, Shigeaki
Annals of Nuclear Energy, 26(3), p.237 - 264, 1999/00
Times Cited Count：12 Percentile：66.1(Nuclear Science & Technology)no abstracts in English
Cf and 
Am-Be neutron sourceJ.R.Dumais*; Yoshizawa, Michio; Yamaguchi, Yasuhiro
JAERI-Tech 98-005, 65 Pages, 1998/03
no abstracts in English
Ishikawa, Isamu
Radioisotopes, 46(8), p.567 - 572, 1997/08
no abstracts in English
J.R.Dumais*; Yoshizawa, Michio; Yamaguchi, Yasuhiro
JAERI-Tech 97-033, 35 Pages, 1997/07
no abstracts in English
Ishikawa, Isamu
Proc. of 11th KAIF/KNS Annual Conf., 0, p.611 - 619, 1996/00
no abstracts in English
Cf neutronsJAERI-Research 95-073, 11 Pages, 1995/11
JAERI-Research-95-073.pdf:0.49MB
no abstracts in English
*; *; *; ; Ishikawa, Isamu
Proc. of 2nd Int. Topical Meeting on Neutron Radiography System Design and Characterization, 0, p.335 - 342, 1995/00
no abstracts in English
Cf neutron sourceNishitani, Takeo; Takeuchi, Hiroshi; Kondoh, Takashi; Ito, Takao*; Kuriyama, Masaaki; Ikeda, Yujiro; Iguchi, Tetsuo*; Barnes, C. W.*
Review of Scientific Instruments, 63(11), p.5270 - 5278, 1992/11
Times Cited Count：75 Percentile：97.14(Instruments & Instrumentation)no abstracts in English
CfShinohara, Nobuo; ; *; Tsukada, Kazuaki*; Otsuki, Tsutomu*; J.Alstad*
Radiochimica Acta, 56, p.127 - 131, 1992/00
no abstracts in English
Tsukada, Kazuaki*; Otsuki, Tsutomu*; Sueki, Keisuke*; *; *; *; Nakahara, Hiromichi*; Shinohara, Nobuo; ; Usuda, Shigekazu; et al.
Radiochimica Acta, 51(2), p.77 - 84, 1990/00
no abstracts in English
