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JAEA Reports

Annual report on the present state and activities of the Radiation Protection Department, Nuclear Fuel Cycle Engineering Laboratories in fiscal year 2020

Radiation Protection Department

JAEA-Review 2023-045, 188 Pages, 2024/03

JAEA-Review-2023-045.pdf:13.57MB

This annual report summarizes the radiological control activities at the Nuclear Fuel Cycle Engineering Laboratories (NCL) facilities conducted by the Radiation Protection Department in fiscal year (FY) 2020. NCL operates the Tokai Reprocessing Plant (TRP), MOX fuel facilities, the Chemical Processing Facility, and various radioisotopes and uranium research laboratories, some of which are in the process of decommissioning. The Radiation Protection Department is responsible for the radiological control in and around NCL, including personnel monitoring, workplace monitoring, consultation on radiological work planning and evaluation, monitoring of gaseous and liquid waste effluents, environmental monitoring, radiological standards, maintenance of radiation monitoring instruments, quality management, and the related research. In FY 2020, the results of radiological monitoring showed that the situation was normal, and no radiological incident or accident occurred. The maximum annual effective dose to radiation workers was 5.8 mSv, and the mean annual effective dose was 0.1 mSv. Individual doses were within the annual dose limit specified in the safety regulations. The maximum effective dose caused by gaseous and liquid effluents from the TRP to members of the public in the vicinity of NCL was estimated to be 1.5$$times$$10$$^{-4}$$ mSv. Environmental monitoring and effluent control were performed appropriately in compliance with safety regulations and standards. Although some of the measurement data did not fall within the normal range due to the accident at the Fukushima Daiichi Nuclear Power Station, it was confirmed that the TRP and other NCL facilities had no impact on the environment. As for the quality management activities, the government inspection, the internal audit, and the maintenance of revised documents were continued in accordance with the quality management system implemented for safety regulation since FY 2004.

JAEA Reports

Annual report for FY2022 on the activities of radiation safety in Nuclear Science Research Institute etc. (April 1, 2022 - March 31, 2023)

Department of Radiation Protection, Nuclear Science Research Institute; Nuclear Facilities Management Section, Aomori Research and Development Center

JAEA-Review 2023-044, 111 Pages, 2024/03

JAEA-Review-2023-044.pdf:3.07MB

This annual report describes the activities in the 2022 fiscal year of Department of Radiation Protection in Nuclear Science Research Institute, Harima Synchrotron Radiation Radioisotope Laboratory and Nuclear Facilities Management Section in Aomori Research and Development Center. The activities described are environmental monitoring, radiation protection practices in workplaces, individual monitoring, maintenance of monitoring instruments, and research and development of radiation protection. At these institutes the occupational exposures did not exceed the dose limits. The radioactive gaseous and liquid discharges from the facilities were well below the prescribed limits. The research and development activities produced certain results in the fields of radiation protection technique.

JAEA Reports

Annual report for FY 2021 on the activities of radiation safety in Nuclear Science Research Institute etc. (April 1, 2021 - March 31, 2022)

Department of Radiation Protection, Nuclear Science Research Institute; Nuclear Facilities Management Section, Aomori Research and Development Center

JAEA-Review 2022-077, 104 Pages, 2023/03

JAEA-Review-2022-077.pdf:2.5MB

This annual report describes the activities in the 2021 fiscal year of Department of Radiation Protection in Nuclear Science Research Institute, Harima Synchrotron Radiation Radioisotope Laboratory and Nuclear Facilities Management Section in Aomori Research and Development Center. The activities described are environmental monitoring, radiation protection practices in workplaces, individual monitoring, maintenance of monitoring instruments, and research and development of radiation protection. At these institutes the occupational exposures did not exceed the dose limits. The radioactive gaseous and liquid discharges from the facilities were well below the prescribed limits. The research and development activities produced certain results in the fields of radiation protection technique.

JAEA Reports

Annual report on the present state and activities of the Radiation Protection Department, Nuclear Fuel Cycle Engineering Laboratories in fiscal year 2019

Radiation Protection Department

JAEA-Review 2021-075, 174 Pages, 2022/03

JAEA-Review-2021-075.pdf:7.16MB

This annual report summarizes the various activities on radiation control at the nuclear fuel cycle facilities in Nuclear Fuel Cycle Engineering Laboratories, which were undertaken by the Radiation Protection Department in fiscal year (FY) 2019. In the Laboratories, the Tokai Reprocessing Plant (TRP), MOX fuel fabrication facilities, the Chemical Processing Facility (CPF), and various other radioisotopes and uranium research laboratories have been operated. The Radiation Protection Department is responsible for the radiation control in and around the facilities, including personnel monitoring, workplace monitoring, consultation on radiological work planning and evaluation, monitoring of gaseous and liquid waste effluents, environmental monitoring, radiological standards, maintenance of radiation monitoring instruments, quality management, and the related research. In FY 2019, the results of radiological monitoring showed the situation to be normal, and no radiological incident or accident occurred. The maximum annual effective dose to radiation workers was 5.3 mSv, and the mean annual effective dose was 0.1 mSv. Individual doses were kept within the annual dose limit specified in the safety regulations. The maximum estimated effective dose caused by gaseous and liquid effluents from the TRP to imaginary members of the public around the Laboratories was 1.6$$times$$10$$^{-4}$$ mSv. The environmental monitoring and effluent control were performed appropriately in compliance with safety regulations and standards. Due to the accident at the Fukushima Daiichi Nuclear Power Station, some of the measurement data did not fall within the normal range, but it was confirmed that the facilities of the Nuclear Fuel Cycle Engineering Laboratories, such as the TRP, did not have any impact on the environment. As for the quality management activities, the inspection by the government, the internal audit, and the maintenance to revise the documents have been continued in accordance with

JAEA Reports

Annual report for FY2020 on the activities of radiation safety in Nuclear Science Research Institute etc. (April 1, 2020 - March 31, 2021)

Department of Radiation Protection, Nuclear Science Research Institute; Nuclear Facilities Management Section, Aomori Research and Development Center

JAEA-Review 2021-071, 119 Pages, 2022/03

JAEA-Review-2021-071.pdf:4.59MB

This annual report describes the activities in the 2020 fiscal year of Department of Radiation Protection in Nuclear Science Research Institute, Harima Synchrotron Radiation Radioisotope Laboratory and Nuclear Facilities Management Section in Aomori Research and Development Center. The activities described are environmental monitoring, radiation protection practices in workplaces, individual monitoring, maintenance of monitoring instruments, and research and development of radiation protection. At these institutes the occupational exposures did not exceed the dose limits. The radioactive gaseous and liquid discharges from the facilities were well below the prescribed limits. The research and development activities produced certain results in the fields of radiation protection technique.

JAEA Reports

Annual report for FY2019 on the activities of radiation safety in Nuclear Science Research Institute etc. (April 1, 2019 - March 31, 2020)

Department of Radiation Protection, Nuclear Science Research Institute; Nuclear Facilities Management Section, Aomori Research and Development Center

JAEA-Review 2020-079, 118 Pages, 2021/03

JAEA-Review-2020-079.pdf:3.65MB

This annual report describes the activities in the 2019 fiscal year of Department of Radiation Protection in Nuclear Science Research Institute, Harima Synchrotron Radiation Radioisotope Laboratory and Nuclear Facilities Management Section in Aomori Research and Development Center. The activities described are environmental monitoring, radiation protection practices in workplaces, individual monitoring, maintenance of monitoring instruments, and research and development of radiation protection. At these institutes the occupational exposures did not exceed the dose limits. The radioactive gaseous and liquid discharges from the facilities were well below the prescribed limits. The research and development activities produced certain results in the fields of radiation protection technique.

JAEA Reports

Annual report on the present state and activities of the Radiation Protection Department, Nuclear Fuel Cycle Engineering Laboratories in fiscal year 2014-2018

Radiation Protection Department

JAEA-Review 2020-078, 475 Pages, 2021/03

JAEA-Review-2020-078.pdf:14.93MB

This annual report summarizes the various activities on radiation control at the nuclear fuel cycle facilities in Nuclear Fuel Cycle Engineering Laboratories, which were undertaken by the Radiation Protection Department in fiscal year 2014-2018.

JAEA Reports

Annual report for FY2018 on the activities of radiation safety in Nuclear Science Research Institute etc. (April 1, 2018 - March 31, 2019)

Department of Radiation Protection, Nuclear Science Research Institute; Nuclear Facilities Management Section, Aomori Research and Development Center

JAEA-Review 2020-009, 112 Pages, 2020/07

JAEA-Review-2020-009.pdf:3.34MB

This annual report describes the activities in the 2018 fiscal year of Department of Radiation Protection in Nuclear Science Research Institute, Harima Office and Nuclear Facilities Management Section in Aomori Research and Development Center.

JAEA Reports

Annual report on the present state and activities of the Radiation Protection Department, Nuclear Fuel Cycle Engineering Laboratories in fiscal year 2010-2013

Radiation Protection Department

JAEA-Review 2018-035, 368 Pages, 2019/11

JAEA-Review-2018-035.pdf:12.34MB

This annual report summarizes the various activities on radiation control at the nuclear fuel cycle facilities in Nuclear Fuel Cycle Engineering Laboratories, which were undertaken by the Radiation Protection Department in fiscal year 2010-2013.

JAEA Reports

Annual report for FY2017 on the activities of radiation safety in Nuclear Science Research Institute etc. (April 1, 2017 - March 31, 2018)

Department of Radiation Protection, Nuclear Science Research Institute; Nuclear Facilities Management Section, Aomori Research and Development Center

JAEA-Review 2018-034, 123 Pages, 2019/03

JAEA-Review-2018-034.pdf:11.08MB

This annual report describes the activities in the 2017 fiscal year of Department of Radiation Protection in Nuclear Science Research Institute, Harima Office and Nuclear Facilities Management Section in Aomori Research and Development Center.

JAEA Reports

Annual report for FY2016 on the activities of radiation safety in Nuclear Science Research Institute etc. (April 1, 2016 - March 31, 2017)

Department of Radiation Protection, Nuclear Science Research Institute; Nuclear Facilities Management Section, Aomori Research and Development Center

JAEA-Review 2017-036, 133 Pages, 2018/03

JAEA-Review-2017-036.pdf:4.72MB

This annual report describes the activities in the 2016 fiscal year of Department of Radiation Protection in Nuclear Science Research Institute, Harima Office and Nuclear Facilities Management Section in Aomori Research and Development Center.

JAEA Reports

Annual report for FY2015 on the activities of radiation safety in Nuclear Science Research Institute etc. (April 1, 2015 - March 31, 2016)

Department of Radiation Protection, Nuclear Science Research Institute; Safety Section, Department of Administrative Services, Takasaki Advanced Radiation Research Institut; Safety and Utilities Section, Department of Administrative Services, Kansai Photon Science Institute; Operation Safety Administration Section, Mutsu Office, Aomori Research and Development Center; Safety Section, Department of Administrative Services, Naka Fusion Institute

JAEA-Review 2016-033, 180 Pages, 2017/03

JAEA-Review-2016-033.pdf:12.25MB

This annual repost describes the activities in the 2015 fiscal year of Department of Radiation Protection in Nuclear Science Research Institute, Safety Section in Takasaki Advanced Radiation Research Institute, Safety and Utilities Section in Kansai Photon Science Institute, Nuclear Facilities Management Section in Aomori Research and Development Center and Safety Section in Naka Fusion Institute.

JAEA Reports

Annual report for FY2014 on the activities of radiation safety in Nuclear Science Research Institute etc. (April 1, 2014 - March 31, 2015)

Department of Radiation Protection, Nuclear Science Research Institute; Safety Section, Department of Administrative Services, Takasaki Advanced Radiation Research Institut; Safety Section, Department of Administrative Services, Kansai Photon Science Institute; Operation Safety Administration Section, Mutsu Office, Aomori Research and Development Center; Safety Section, Department of Administrative Services, Naka Fusion Institute

JAEA-Review 2015-033, 185 Pages, 2016/03

JAEA-Review-2015-033.pdf:10.89MB

This annual report describes the activities in the 2014 fiscal year of Department of Radiation Protection in Nuclear Science Research Institute, Safety Section in Takasaki Advanced Radiation Research Institute, Safety Section in Kansai Photon Science Institute, Operation Safety Administration Section in Aomori Research and Development Center and Safety Section in Naka Fusion Institute.

JAEA Reports

Annual report on the present state and activities of the Radiation Protection Department, Nuclear Fuel Cycle Engineering Laboratories in fiscal 2009

Radiation Protection Department

JAEA-Review 2015-003, 187 Pages, 2015/03

JAEA-Review-2015-003.pdf:18.34MB

This annual report summarizes the various activities on radiation control at the nuclear fuel cycle facilities in Nuclear Fuel Cycle Engineering Laboratories, which were undertaken by the Radiation Protection Department in fiscal 2009. In the Laboratories, the Tokai Reprocessing Plant (TRP), MOX fuel fabrication facilities, the Chemical Processing Facility (CPF), and various other radioisotopes and uranium research laboratories have been operated. The Radiation Protection Department is responsible for the radiation control in and around the facilities, including personnel monitoring, workplace monitoring, consultation on radiological work planning and evaluation, monitoring of gaseous and liquid waste effluents, environmental monitoring, radiological standards, maintenance of radiation monitoring instruments, quality management, and the related research. In fiscal 2009, the results of radiological monitoring showed the situation to be normal, and no radiological incident or accident occurred. The maximum annual effective dose to radiation workers was 9.7 mSv and the mean annual effective dose was 0.2 mSv. Individual doses were kept within the annual dose limit specified in the safety regulations. The estimated effective dose caused by gaseous and liquid effluents from the TRP to imaginary members of the public around the Laboratories was 1.8$$times$$10$$^{-4}$$ mSv. The environmental monitoring and effluent control were performed appropriately in compliance with safety regulation and standards. As for the quality management activities, the inspection by the government, the internal audit, and the maintenance to revise the documents have been continued in accordance with the quality management system which had been introduced to safety regulation since fiscal 2004.

JAEA Reports

Annual report for FY2013 on the activities of radiation safety in Nuclear Science Research Institute etc. (April 1, 2013 - March 31, 2014)

Department of Radiation Protection, Nuclear Science Research Institute; Safety Section, Department of Administrative Services, Takasaki Advanced Radiation Research Institut; Safety Section, Department of Administrative Services, Kansai Photon Science Institute; Operation Safety Administration Section, Mutsu Office, Aomori Research and Development Center; Safety Section, Department of Administrative Services, Naka Fusion Institute

JAEA-Review 2014-059, 194 Pages, 2015/03

JAEA-Review-2014-059.pdf:13.66MB

This annual report describes the activities in the 2013 fiscal year of Department of Radiation Protection in Nuclear Science Research Institute, Safety Section in Takasaki Advanced Radiation Research Institute, Safety Section in Kansai Photon Science Institute, Operation Safety Administration Section in Aomori Research and Development Center and Safety Section in Naka Fusion Institute.

JAEA Reports

Annual report for FY2012 on the activities of radiation safety in Nuclear Science Research Institute etc. (April 1, 2012 - March 31, 2013)

Department of Radiation Protection, Nuclear Science Research Institute; Safety Section, Department of Administrative Services, Takasaki Advanced Radiation Research Institut; Safety Section, Department of Administrative Services, Kansai Photon Science Institute; Operation Safety Administration Section, Mutsu Office, Aomori Research and Development Center; Safety Section, Department of Administrative Services, Naka Fusion Institute

JAEA-Review 2013-048, 197 Pages, 2014/02

JAEA-Review-2013-048.pdf:13.75MB

This annual report describes the activities of Radiation Protection Sector in Department of Radiation Protection in Nuclear Science Research Institute, Safety Section in Takasaki Advanced Radiation Research Institute, Safety Section in Kansai Photon Science Institute, Operation Safety Administration Section in Aomori Research and Development Center and Safety Section in Naka Fusion Institute.

JAEA Reports

Annual report for FY2011 on the activities of radiation safety in Nuclear Science Research Institute etc. (April 1, 2011 - March 31, 2012)

Department of Radiation Protection, Nuclear Science Research Institute; Safety Section, Department of Administrative Services, Takasaki Advanced Radiation Research Institut; Safety Section, Department of Administrative Services, Kansai Photon Science Institute; Operation Safety Administration Section, Mutsu Office, Aomori Research and Development Center; Safety Section, Department of Administrative Services, Naka Fusion Institute

JAEA-Review 2012-041, 181 Pages, 2013/01

JAEA-Review-2012-041.pdf:6.04MB

This annual report describes the activities of Radiation Protection Sector in Department of Radiation Protection in Nuclear Science Research Institute, Safety Section in Takasaki Advanced Radiation Research Institute, Safety Section in Kansai Photon Science Institute, Operation Safety Administration Section in Aomori Research and Development Center and Safety Section in Naka Fusion Institute.

JAEA Reports

Annual report for FY2010 on the activities of radiation safety in Nuclear Science Research Institute etc. (April 1, 2010 - March 31, 2011)

Department of Radiation Protection, Nuclear Science Research Institute; Safety Section, Department of Administrative Services, Takasaki Advanced Radiation Research Institut; Safety Section, Department of Administrative Services, Kansai Photon Science Institute; Operation Safety Administration Section, Mutsu Office, Aomori Research and Development Center; Safety Section, Department of Administrative Services, Naka Fusion Institute

JAEA-Review 2012-001, 181 Pages, 2012/03

JAEA-Review-2012-001.pdf:5.26MB

This annual report describes the activities of Radiation Protection Sector in Department of Radiation Protection in Nuclear Science Research Institute, Safety Section in Takasaki Advanced Radiation Research Institute, Safety Section in Kansai Photon Science Institute, Operation Safety Administration Section in Aomori Research and Development Center and Safety Section in Naka Fusion Institute.

JAEA Reports

Investigation of radiocesium volatilization from soil by in-situ ground heating

Department of Partnership Operations for Environmental Remediation, Headquarters of Fukushima Partne; Ningyo-toge Environmental Engineering Center; Vitrification Technology Development Department, Tokai Reprocessing Technology Development Center; Environmental Protection Section, Radiation Protection Department

JAEA-Research 2011-026, 74 Pages, 2011/11

JAEA-Research-2011-026.pdf:5.9MB

After the Fukushima nuclear accident, extensive area was contaminated with radionuclides from the Fukushima Daiichi Nuclear Power Plant and various methods have been investigated to remedy such contamination. To understand potential of in-situ ground heating and radionuclide desorption, behaviors of ground temperature and of radiocesium volatility by in-situ heating was investigated. More than 15 minutes was necessary to accomplish melting temperature of several cesium compounds by heating using portable burner and maximum temperature was about 700 degree in Celsius. At the time ground surface temperature was about 600 degree, the temperature at 1cm depth was about 300 degree, whereas the temperature at 5cm depth was 50-60 degree. Under the condition of heating temperature of 600-1,300 degree and heating period of 5-60 minutes, activity of Cs-134 and Cs-137 varied in the range of -9.8 to +14.0% after heating using electric furnace and any volatility of radiocesium was not recognized. TG/DTA analysis for soil and zeolite (mordenite) which mixed with nonradioactive Cs compound each were also carried out to understand chemical form and volatility behavior of radiocesium. It is suggested that chemical compound e.g., CsAlSiO$$_{4}$$ would be formed when SiO$$_{2}$$ and Al$$_{2}$$O$$_{3}$$3 were composed in the system and radiocesium would remain in soil under the high temperature condition, whereas Cs in CsCO$$_{3}$$ would be volatized in the SiO$$_{2}$$ and/or Al$$_{2}$$O$$_{3}$$ free system.

JAEA Reports

Annual report for FY2009 on the activities of radiation safety in Nuclear Science Research Institute etc. (April 1, 2009 - March 31, 2010)

Department of Radiation Protection, Nuclear Science Research Institute; Safety Section, Department of Administrative Services, Takasaki Advanced Radiation Research Institut; Safety Section, Department of Administrative Services, Kansai Photon Science Institute; Operation Safety Administration Section, Mutsu Office, Aomori Research and Development Center; Safety Section, Department of Administrative Services, Naka Fusion Institute

JAEA-Review 2010-074, 168 Pages, 2011/01

JAEA-Review-2010-074.pdf:5.82MB

This annual report describes the activities of Radiation Protection Sector in Department of Radiation Protection in Nuclear Science Research Institute, Safety Section in Takasaki Advanced Radiation Research Institute, Safety Section in Kansai Photon Science Institute, Operation Safety Administration Section in Aomori Research and Development Center and Safety Section in Naka Fusion Institute.

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