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Ichikawa, Shoichi; Chiba, Yusuke; Ono, Fumiyasu; Hatori, Masakazu; Kobayashi, Takanori; Uekura, Ryoichi; Hashiri, Nobuo*; Inuzuka, Taisuke*; Kitano, Hiroshi*; Abe, Hisashi*
JAEA-Research 2016-021, 32 Pages, 2017/02
In order to reduce the influence on a plant schedule of the MONJU by the maintenance of dew point hygrometers, The JAEA examined a capacitance type dew point hygrometer as an alternative dew point hygrometer for a lithium-chloride type dew point hygrometer which had been used at the CV-LRT in the MONJU. As a result of comparing a capacitance type dew point hygrometer with a lithium-chloride type dew point hygrometer at the CV-LRT (Atmosphere: nitrogen, Testing time: 24 hours), there weren't significant difference between a capacitance type dew point hygrometer and a lithium-chloride type dew point hygrometer. As a result of comparing a capacitance dew point hygrometer with a high-mirror-surface type dew point hygrometer for long term verification (Atmosphere: air, Testing time: 24 months), the JAEA confirmed that a capacitance type dew point hygrometer satisfied the instrument specification (2.04C) required by the JEAC4203-2008.
Yoshizawa, Michio
Hokeikyo Nyusu, (29), p.2 - 5, 2002/05
no abstracts in English
Yoshizawa, Michio; Saegusa, Jun; Tanimura, Yoshihiko; Yoshida, Makoto
Proceedings of 14th Meeting of Consultative Committee for Ionizing Radiation, 5 Pages, 2002/00
no abstracts in English
Kojima, Takuji; Tachibana, Hiroyuki; Haneda, Noriyuki; Kaneko, Hirohisa; Haruyama, Yasuyuki; Tanaka, Ryuichi*
Radioisotopes, 50(7), p.291 - 300, 2001/07
Plaque type Co -ray sources having wide radiation field with high absorbed dose rates ranging of about 10010,000Gy/h is widely used in radiation processing e.g. radiation sterilization of health care products. Calibration of such radiation processing doses or dose rates is not easy to be performed at the present standard dosimetry laboratories, since characteristics of most of their radiation field can provide collimated gamma-rays from a point source and/or lower dose rates, which are quite different from those of panoramic (uncollimated) radiation fields used in radiation processing. The high-dose calibration technique using a parallel-plate ionization chamber system has developed in the JAERI dose calibration facility. The facility equips two Co -ray plaque sources covering wide dose-rate range of 520,000 Gy/h which have overlapping dose-rate region with that at the National Institute of Advanced Industrial Science and Technology(AIST), the national standard Dosimetry laboratory in Japan. Consistency of dose calibration results at JAERI and those at AIST was verified without additional correction regarding to difference in characteristics of radiation fields involving current/exposure -rate conversion coefficients given in the dose rate level of 10100 Gy/h at the AIST and high-dose rates of 520,000 Gy/h at JAERI. It demonstrates our dose traceability to the AIST from the technical point of view. The dose calibration at JAERI covers the high-dose range of 0.5 to Gy with uncertainty of 2.2% at 95% confidence level.
Yoshida, Makoto; Saito, Kimiaki
Nihon Genshiryoku Gakkai-Shi, 43(4), P. 311, 2001/04
no abstracts in English
Murakami, Hiroyuki
Hoken Butsuri, 36(4), p.359 - 361, 2001/01
no abstracts in English
Kojima, Takuji
Hoshasen To Sangyo, (89), p.4 - 7, 2001/01
This paper describes the present status of dosimetry as one of the useful technique for the process/quality control in radiation application and radiation research/testing. It introduces (a)activities in dose standardization of International Organization for Standardization(ISO) and International Atomic Energy Agency(IAEA) on publication of standards and organization of workshops, (b)recent efforts for consistency check in dose evaluation of electrons having energies above 4MeV, and (c)development status of dosimeter systems relevant to new requirements in dosimetry. It also comments on importance of planning for succession of high-dose dosimetry technology and education/training of dosimetry workers/researchers.
Iwamoto, Seikichi; Takeuchi, Norio; Onoma, Katsuyuki; Nemoto, Masahiro*
JAERI-Tech 2000-055, 15 Pages, 2000/09
no abstracts in English
Murakami, Hiroyuki
Hokeikyo Nyusu, (26), p.2 - 5, 2000/07
no abstracts in English
Murakami, Hiroyuki
Genshiryoku eye, 45(3), p.61 - 63, 1998/03
no abstracts in English
Tanaka, Ryuichi
Hoshasen To Sangyo, (59), p.14 - 19, 1993/09
no abstracts in English
Tanaka, Ryuichi; Takehisa, Masaaki*
Hoshasen Kagaku, (56), p.9 - 19, 1993/00
no abstracts in English
Minami, Kentaro
Firumu Bajji Nyusu, 0(189), p.1 - 5, 1992/09
no abstracts in English
Yoshida, Makoto; Kawasaki, Katsuya;
Radioisotopes, 41(6), p.316 - 319, 1992/06
no abstracts in English
Minami, Kentaro
Nagase FB Dayori, 0(173), p.6 - 7, 1992/05
no abstracts in English
Tanaka, Ryuichi
Genshiryoku Kogyo, 36(3), p.32 - 36, 1990/00
no abstracts in English