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Journal Articles

2016 Professional Engineer (PE) test preparation course "Nuclear and Radiation Technical Disciplines"

Takahashi, Naoki; Yoshinaka, Kazuyuki; Harada, Akio; Yamanaka, Atsushi; Ueno, Takashi; Kurihara, Ryoichi; Suzuki, Soju; Takamatsu, Misao; Maeda, Shigetaka; Iseki, Atsushi; et al.

Nippon Genshiryoku Gakkai Homu Peji (Internet), 64 Pages, 2016/00

no abstracts in English

Journal Articles

Issues associated with radiation protection after Fukushima Daiichi Nuclear Power Plant disaster

Yamasoto, Kotaro

Gijutsushi, 27(11), p.8 - 11, 2015/11

Various analysis reports focused on Fukushima Daiichi Nuclear Power Plant disaster have been published from government, national diet, private group and Tokyo electric power company. Japan Health Physics Society (JHPS) analyzed these reports on perspective of radiation protection, and has reported towards the national and international society as "second-order recommendation report". What are radiation protection issues that have been found from these analysis reports? What is the direction of the goal of radiation protection system at the time of nuclear accident? From the results of these analyzes, many challenges have been found in current nuclear disaster prevention system.

Journal Articles

Opinion of young researchers about implementation of new ICRP recommendation in domestic laws

Ogino, Haruyuki*; Kono, Takahiko; Yamasoto, Kotaro; Fujiwara, Keiko*; Suzuki, Chihiro*

Nippon Genshiryoku Gakkai-Shi, 52(8), p.458 - 461, 2010/08

no abstracts in English

Journal Articles

The Rules of the professional engineers responsible for radiation protection

Yamasoto, Kotaro

Genshiryoku eye, 55(12), p.56 - 57, 2009/12

Professional engineers have an obligation to develop own technical capability and high degree of a sense of ethics. This report describes authors recognition on the rules of professional engineer responsible for radiation protection. In order to fulfill the sake of radiation control, follows are taken into account; (1) how we should solve about a dilemma between compliance and sense of ethics which is encountered in daily activities, (2) the rules of professional engineers for developing new technology, and (3) transmission of technology to be done as a professional engineer.

Journal Articles

On the session "securing and fostering of the younger experts responsible for radiation protection" of the 5th OECD/NEA Asian Conference

Yamasoto, Kotaro; Imaoka, Tatsuhiko*; Le Ngoc Thiem*; Matsumoto, Yoshihisa*

Hoshasen Kagaku, 52(10), p.21 - 25, 2009/10

The Fifth Asian Regional Conference of the Evolution of the System of Radiation Protection was held by OECD Nuclear Energy Agency, Committee on Radiation Protection and Public Health (OECD/NEA CRPPH), on September 3rd and 4th. Young researchers and engineers edit the session "securing and fostering of the younger experts responsible for radiation protection", in the conference. Chairman and each speakers summarize their findings.

Journal Articles

The Report of OECD/NEA CRPPH EGIR Tokyo Satellite Meeting on Revision of Basic Safety Standards

Yamasoto, Kotaro

Hoken Butsuri, 44(3), p.274 - 276, 2009/09

The Organization for Economic Co-operation and Development Nuclear Energy Agency (OECD/NEA) is one of co-sponsors for drafting of "International Basic Safety Standards for Protection against Ionizing Radiation and for the Safety of Radiation Source" (BSS). The documents report on the OECD/NEA EGIR Tokyo satellite meeting for revision of Basic Safety Standards held by OECD/NEA Expert Group on the Implications of ICRP Recommendations (EGIR).

Journal Articles

Diurnal and seasonal variations in $$^{222}$$Rn concentration profile in soil

Iskandar, D.*; Yamazawa, Hiromi*; Yamasoto, Kotaro; Ota, Masakazu*; Koarashi, Jun; Moriizumi, Jun*; Bunawas*; Iida, Takao*

Hoken Butsuri, 42(1), p.98 - 104, 2007/03

The $$^{222}$$Rn concentrations in soil and $$^{222}$$Rn flux were measured at 6 depths in soil to analyze the seasonal- day-to-day and diurnal variations. The variations of $$^{222}$$Rn concentrations in soil were larger in shallow depths. It seems that the $$^{222}$$Rn concentration in soil during night-time was slightly lower than day-time especially at depth of 15 cm. The precipitation may have affected the concentration insoil differently depending on its amounts. The large decrease in air pressure during one day increased the concentration in soil at shallow soil layers. The effect of soil water content on $$^{222}$$Rn concentration in soil was also observed.

Journal Articles

CsI(Tl)/Plastic phoswich detector enhanced in low-energy $$gamma$$-ray detection

Yamasoto, Kotaro; Tsutsumi, Masahiro; Oishi, Tetsuya*; Yoshizawa, Michio; Yoshida, Makoto

Nuclear Instruments and Methods in Physics Research A, 550(3), p.609 - 615, 2005/09

 Times Cited Count:3 Percentile:68.33(Instruments & Instrumentation)

A phoswich detector composed of a thin plate CsI(Tl) scintillator and a plastic scintillator (BC-400) has been designed and evaluated to improve the sensitivity in the low-energy region of large-area plastic scintillation detector. Applicability of the CsI(Tl)/Plastic phoswich detector was examined on radioactivity measurement of massive and large-area materials. The rise-time discrimination technique was applied in order to further improve the minimum detectable activity in the low-energy region. On the basis of the estimation of minimum detectable activity, it was made clear that the energy range of large-area plastic scintillation detector can be expanded down to a few tens of keV by adding a thin plate CsI(Tl) scintillator.

JAEA Reports

Development of elemental components in NDA systems for certifying radioactive wastes with the clearance level

Tsutsumi, Masahiro; Oishi, Tetsuya*; Yamasoto, Kotaro; Yoshida, Makoto

JAERI-Research 2004-021, 43 Pages, 2004/12

JAERI-Research-2004-021.pdf:8.55MB

We have designed and developed a $$gamma$$ measurement system to certify radioactive wastes below the clearance level. By advancing non-destructive $$gamma$$-ray assay technology, it aims at quantitative determination of radionuclides contained in 200 litter drum/container wastes. Unlike the waste from a nuclear power plant, you have to assume that the waste originating from radioisotope usage and nuclear research laboratory have a variety of contents and a complex mixture of radionuclides, and furthermore the uniformity of activity concentration is unknown. To cope with the problems, we have developed the $$gamma$$-ray measuring instruments (units) with effective improvement of capability against each problem. They are (1) germanium $$gamma$$ spectrometry unit for enhanced peak identification, (2) positioning detection unit for positioning of $$gamma$$ interactions and (3)high-efficiency detection unit for separation of low-energy component. This report summarizes the direction of the clearance level measuring system and the three developed measuring units with their performances.

Oral presentation

Investigation of radiation control relating to a radioactive surface contamination monitor

Yamasoto, Kotaro; Kawasaki, Masatsugu; Kawamatsu, Yorimitsu

no journal, , 

no abstracts in English

Oral presentation

Securing and fostering the younger experts responsible for radiation protection; Views from the young radiation protection engineers in Japan

Yamasoto, Kotaro

no journal, , 

This presentation is a part of session which is titled securing and fostering the younger experts responsible for radiation protection. Speaker reports results of current status survey for securing and fostering the radiation protection (RP) engineers. The reports are based on comments from 20 organizations such as RP-related research institute, radiation monitoring institute, and industries. In addition, proposals about activities for development of engineer resources, which are desired by engineers of young researchers association of Japan Health Physics Society, are reported. These results of surveys both organizations and young RP engineers are concluded as follows: In order to foster young RP engineers, both subjects are recognizing that (1) actively participating RP engineers in RP-related conferences and committees and (2) developing own specialty are more effective measure. Young RP engineers aspire, (3) to have responsibility for own work and to increases various experiences.

Oral presentation

Suggestion from Young Researcher's Association in Japan Health Physics Society about implementation of new ICRP recommendation in domestic laws

Kono, Takahiko; Ogino, Haruyuki*; Hokama, Tomonori; Yamasoto, Kotaro; Fujiwara, Keiko*; Suzuki, Chihiro*

no journal, , 

We state opinion of Young Researcher's to students about implementation of new ICRP recommendation in domestic laws.

Oral presentation

Radiation monitoring during medical and animal irradiation in research reactor facility

Kobayashi, Toshiaki; Kawamatsu, Yorimitsu; Yamasoto, Kotaro; Yamada, Katsunori; Sekita, Tsutomu; Kabuto, Masayuki

no journal, , 

no abstracts in English

Oral presentation

Shield effect of the respirator and estimated dose to the lens of the eye for the worker in the cell

Torii, Yosuke; Yamasoto, Kotaro; Kato, Takuya; Yoshitomi, Hiroshi

no journal, , 

no abstracts in English

Oral presentation

Relationship between Contamination Level and Scanning Condition for Surface Contamination Survey Meter Using in Nuclear Science Research Institute

Kato, Takuya; Torii, Yosuke; Futagawa, Kazuo; Yamasoto, Kotaro

no journal, , 

no abstracts in English

15 (Records 1-15 displayed on this page)
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