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JAEA Reports

Annual report on the effluent control of low level liquid waste in Nuclear Fuel Cycle Engineering Laboratories FY2020

Nakano, Masanao; Nakada, Akira; Kanai, Katsuta; Nagaoka, Mika; Koike, Yuko; Yamada, Ryohei; Kubota, Tomohiro; Yoshii, Hideki*; Otani, Kazunori*; Hiyama, Yoshinori*; et al.

JAEA-Review 2021-040, 118 Pages, 2021/12

JAEA-Review-2021-040.pdf:2.48MB

Based on the regulations (the safety regulation of Tokai Reprocessing Plant, the safety regulation of nuclear fuel material usage facilities, the radiation safety rule, the regulation about prevention from radiation hazards due to radioisotopes, which are related with the nuclear regulatory acts, the local agreement concerning with safety and environment conservation around nuclear facilities, the water pollution control law, and by law of Ibaraki Prefecture), the effluent control of liquid waste discharged from the Nuclear Fuel Cycle Engineering Laboratories of Japan Atomic Energy Agency has been performed. This report describes the effluent control results of the liquid waste in the fiscal year 2020. In this period, the concentrations and the quantities of the radioactivity in liquid waste discharged from the reprocessing plant, the plutonium fuel fabrication facilities, and the other nuclear fuel material usage facilities were much lower than the limits authorized by the above regulations.

JAEA Reports

Annual report on the effluent control of low level liquid waste in Nuclear Fuel Cycle Engineering Laboratories FY2019

Nakano, Masanao; Fujii, Tomoko; Nagaoka, Mika; Koike, Yuko; Yamada, Ryohei; Kubota, Tomohiro; Yoshii, Hideki*; Otani, Kazunori*; Hiyama, Yoshinori*; Kikuchi, Masaaki*; et al.

JAEA-Review 2020-070, 120 Pages, 2021/02

JAEA-Review-2020-070.pdf:2.47MB

Based on the regulations (the safety regulation of Tokai Reprocessing Plant, the safety regulation of nuclear fuel material usage facilities, the radiation safety rule, the regulation about prevention from radiation hazards due to radioisotopes, which are related with the nuclear regulatory acts, the local agreement concerning with safety and environment conservation around nuclear facilities, the water pollution control law, and by law of Ibaraki Prefecture), the effluent control of liquid waste discharged from the Nuclear Fuel Cycle Engineering Laboratories of Japan Atomic Energy Agency has been performed. This report describes the effluent control results of the liquid waste in the fiscal year 2019. In this period, the concentrations and the quantities of the radioactivity in liquid waste discharged from the reprocessing plant, the plutonium fuel fabrication facilities, and the other nuclear fuel material usage facilities were much lower than the limits authorized by the above regulations.

Journal Articles

Series studies on inter-comparison of radiation calibration fields and calibration techniques between KAERI and JAEA

Yoshitomi, Hiroshi; Tanimura, Yoshihiko*; Tatebe, Yosuke; Tsutsumi, Masahiro; Kawasaki, Katsuya; Kowatari, Munehiko; Yoshizawa, Michio; Shimizu, Shigeru*; Kim, J.-S.*; Lee, J.-G.*; et al.

Proceedings of 4th Asian and Oceanic Congress on Radiation Protection (AOCRP-4) (CD-ROM), 4 Pages, 2015/07

Journal Articles

Development of methods for removing the deposit in the combustion chamber of the water tube boiler

Kawasaki, Ichio; Ishiyama, Toru; Nishino, Shohei; Aoki, Masaru*

Boira Kenkyu, (391), p.8 - 14, 2015/06

no abstracts in English

JAEA Reports

Annual report on the effluent control of low level liquid waste in Nuclear Fuel Cycle Engineering Laboratories FY2013

Watanabe, Hitoshi; Nakano, Masanao; Fujita, Hiroki; Kono, Takahiko; Inoue, Kazumi; Yoshii, Hideki*; Otani, Kazunori*; Hiyama, Yoshinori*; Goto, Ichiro*; Kibe, Satoshi*; et al.

JAEA-Review 2014-040, 115 Pages, 2015/01

JAEA-Review-2014-040.pdf:4.26MB

Based on the regulations (the safety regulation of Tokai reprocessing plant, the safety regulation of nuclear fuel material usage facilities, the radiation safety rule, the regulation about prevention from radiation hazards due to radioisotopes, which are related with the nuclear regulatory acts, the local agreement concerning with safety and environment conservation around nuclear facilities, the water pollution control law, and bylaw of Ibaraki prefecture), the effluent control of liquid waste discharged from the Nuclear Fuel Cycle Engineering Laboratories of Japan Atomic Energy Agency has been performed. This report describes the effluent control results of the liquid waste in the fiscal year 2013. In this period, the concentrations and the quantities of the radioactivity in liquid waste discharged from the reprocessing plant, the plutonium fuel fabrication facilities, and the other nuclear fuel material usage facilities were much lower than the limits authorized by the above regulations.

Journal Articles

Effects of carbon-ion irradiation on the morphology and growth in the local green soybean "Kemame" in Aomori Prefecture

Kawasaki, Michio*; Kikyo, Shogo*; Nozawa, Shigeki; Akita, Yusuke*; Hase, Yoshihiro; Narumi, Issey*

Nihon Sakumotsu Gakkai Tohoku Shibu Kaiho, (57), p.61 - 62, 2014/12

no abstracts in English

Journal Articles

Maintenance of immersion ultrasonic testing on the water tube boiler

Ishiyama, Toru; Kawasaki, Ichio; Miura, Hirohito*

Nihon Hozen Gakkai Dai-11-Kai Gakujutsu Koenkai Yoshishu, p.33 - 36, 2014/07

There are 4-boiler systems in NCL. These boilers have been operated in the long term over 20 years. One of them, the leakage of boiler water was found at one of the generating tubes, and 2 adjoining generating tubes were corroded in Dec, 2011. These generating tubes were investigated by immersion ultrasonic testing (UT) for measure thickness of the tube. As a result, thinner tube was found in a part of a bend and near the water drum. These parts are covered with sulfide deposit, it seems that the generating tubes were corroded by sulfide.

JAEA Reports

Annual report on the effluent control of low level liquid waste in Nuclear Fuel Cycle Engineering Laboratories FY2012

Sumiya, Shuichi; Watanabe, Hitoshi; Miyagawa, Naoto; Nakano, Masanao; Fujita, Hiroki; Kono, Takahiko; Inoue, Kazumi; Yoshii, Hideki; Otani, Kazunori*; Hiyama, Yoshinori*; et al.

JAEA-Review 2013-041, 115 Pages, 2014/01

JAEA-Review-2013-041.pdf:19.01MB

Based on the regulations (the safety regulation of Tokai reprocessing plant, the safety regulation of nuclear fuel material usage facilities, the radiation safety rule, the regulation about prevention from radiation hazards due to radioisotopes, which are related with the nuclear regulatory acts, and the local agreement concerning with safety and environment conservation around nuclear facilities, the water pollution control law, and bylaw of Ibaraki prefecture), this report describes the effluent control results of liquid waste discharged from the JAEA's Nuclear Fuel Cycle Engineering Laboratories in the fiscal year 2012, from 1st April 2012 to 31st March 2013. In this period, the concentrations and the quantities of the radioactivity in liquid waste discharged from the reprocessing plant, the plutonium fuel fabrication facilities, and the other facilities were much lower than the authorized limits of the above regulations.

Journal Articles

Evaluation of corrosion on generating tube in water tube boiler

Kawasaki, Ichio; Ishiyama, Toru; Usui, Masahiro*; Murakami, Toshinori*

Boira Kenkyu, (382), p.26 - 33, 2013/12

There are 4-boiler systems in Nuclear Fuel Cycle Engineering Laboratories. These has been operated in over 16 years. In one of them, the leakage that occurred at generating tube was found at Dec. 2011. The investigation of the leakage was carried out. The leaked generating tube was removed, and the part of leakage was cut off, and the deposit around the leakage was removed to analyze the cause of leakage. The analysis was carried out by SEM,EDX,WDX and XRD. etc. Elements of the deposit accumulated to surface of water drum are mainly O, Fe and S, and then many of component was sulfide. Therefore it seems that generating tube was corroded by sulfide. In future plan, operating method will be review to reduce the deposit, and check item will be selected to find the deposit earlier. This report was described about variously activity for the investigation and a future action.

JAEA Reports

The Water supply system in Nuclear Fuel Cycle Engineering Laboratories

Kanazawa, Yusaku; Abiko, Shosuke; Terada, Hideyuki; Kawasaki, Ichio; Isozaki, Norio; Matsumoto, Takenari

JAEA-Technology 2012-029, 82 Pages, 2012/09

JAEA-Technology-2012-029.pdf:7.79MB

Water Supply Facility (WSF) is the facility that products and feed water for Tokai Reprocessing Plant (TRP), Plutonium Fuel Production Facility (PFPF), etc. The kinds of feeding water are drinking water and industrial water that are used for life and operation of TRP, etc. WSF had been constructed in 1958, then it has been operated to 2008. It was received the water from AKOGI pond, then the water was conditioned and fed for many facilities. But it needed high cost for trouble and maintenance because of long-term use. Then new WSF was designed and constructed. The new design is that WSF accepts drinking water and industrial water from local governments; each receiving tank is constructed for new. And operating system and remote monitoring system are installed in WSF that is able to monitor from TUC. This report describes about various activities of the backgrounds, the design, the construction and a future action.

Journal Articles

The Activities for improvement of hot environment in undergrounding pipe-space(trench), 1; The Decrease of the radiant heat from steam pipe

Ishiyama, Toru; Kawasaki, Ichio; Matsumoto, Takenari; Terada, Hideyuki; Kikuchi, Akio; Mizoguchi, Tsuyoshi*; Ikede, Hiroyuki*

Nihon Hozen Gakkai Dai-8-Kai Gakujutsu Koenkai Yoshishu, p.82 - 87, 2011/10

In the undergrounding pipe-space, there are many pipes for utility (electronic cable, water, gas, steam, etc.). These pipes are kept to safe by daily inspection. But hot environment of the pipe-space affects badly the device and a laborer's health. The investigation of the heat distribution was carried on, therefore it was found that the radiant heat around the valve was very much. The method of thermal insulation was examined from the view point of the shape, cost, and effect. Then some of valves were covered with flexible thermal insulation, and the temperature of the area around the covered valves was decreased about 10$$^{circ}$$C.

Journal Articles

The Change of water treatment reagent for boiler operation

Ishiyama, Toru; Kawasaki, Ichio; Asano, Naoki

Boira Kenkyu, (366), p.9 - 15, 2011/04

The Hydrazine has been used for water treatment of the boiler in general industry scene. It has been used in NCL from 1995, too. Ministry of Health, Labour and Welfare do announcement about using hydrazine in 2006, and NCL began to try operation without hydrazine. Hydrazine was replaced to the other reagent that was selected based on the result of a research and an evaluation. Therefore safeguard of environment and labour was carried on by new operation method of water treatment from 2010. This report was described about the result of research and development.

Journal Articles

The Development of boiler operation method; Investigation of deoxidizer for hydrazine

Ishiyama, Toru; Kawasaki, Ichio; Asano, Naoki

Boira, Nyusu, (735), P. 6, 2010/09

The Hydrazine has been used for water treatment of the boiler in general industry scene. It has been used in NCL from 1995, too. Ministry of Health, Labour and Welfare do announcement about using hydrazine in 2006, and NCL began to try operation without hydrazine. Hydrazine was replaced to the other reagent that was selected based on the result of a research and an evaluation. Therefore safeguard of environment and labour was carried on by new operation method of water treatment from 2010. This report was described about the result of research and development.

JAEA Reports

Management of energy-save and environment on the boiler system

Ishiyama, Toru; Asano, Naoki; Kawasaki, Ichio

JAEA-Technology 2009-066, 79 Pages, 2010/02

JAEA-Technology-2009-066.pdf:15.64MB

Tokai Utility Center (TUC) is the facility that products and feeds steam for Tokai Reprocessing Plant (TRP), Plutonium Fuel Production Facility (PFPF), etc. The boiler system needs the management based on the law of "Industrial safety and Health Act" and "Act on the Regulation of Nuclear Source Material, Nuclear Fuel Material and Reactors". In this situation, activity of preservation of environment and energy-save are carried out by means of the improvement of steam generation process and the change of additive to water. Quality assurance procedure has been applied in order to improve the boiler operation continuously. This report describes about various activities of the management, the environment, the energy-saving, and a future action.

Journal Articles

Evaluation of the characteristics of the neutron reference field using D$$_{2}$$O-moderated $$^{252}$$Cf source

Kowatari, Munehiko; Fujii, Katsutoshi; Takahashi, Masa; Yoshizawa, Michio; Shimizu, Shigeru; Kawasaki, Katsuya; Yamaguchi, Yasuhiro

Radiation Protection Dosimetry, 126(1-4), p.138 - 144, 2007/08

 Times Cited Count:3 Percentile:26.87(Environmental Sciences)

The facility of the Radiation Standards (FRS) of the Japan Atomic Energy Agency was equipped with the reference neutron field by using D$$_{2}$$O moderated $$^{252}$$Cf neutron source (D$$_{2}$$O-Cf), with a 30cm diameter D$$_{2}$$O sphere. In order to determine the characteristics of the reference field within the ranges of calibration distance (75 to 200 cm from the center of the source to the calibration point) in detail, the authors performed the evaluation of the neutron spectra and neutron fluence rate at various distances from the D$$_{2}$$O moderated source assembly by computations using MCNP-4C and by experimental studies using Bonner Multi-sphere neutron Spectrometer (BMS). Due to the volume neutron source, it is difficult to measure the contribution of the scattered neutron component with the desirable accuracy by shadow-cone method. In this study, the net counting rate of each counter of BMS was corrected by estimating the ratio of the counting rate of each counter in condition of the experimental and the ideal arrangement by the Monte Carlo calculation. The spectra of the direct component were unfolded by using the corrected counting rate with SAND II code. The averaged dose conversion coefficients (h$$^{*}$$$$phi$$(10) and h$$_{p}$$$$phi$$(10)) and neutron dose rates (H$$^{*}$$(10) and H$$_{p}$$(10)) at various distance were estimated based on the measured spectra. The effectiveness of the correction was discussed by comparing the measured and calculated values. Additionally, the suitable distance for the calibration of personal dosimeter at FRS reference field was evaluated by the results.

Journal Articles

Determination of $$gamma$$-ray efficiency curves for volume samples by the combination of Monte Carlo simulations and point source calibration

Saegusa, Jun; Oishi, Tetsuya; Kawasaki, Katsuya; Yoshizawa, Michio; Yoshida, Makoto; Sawahata, Tadahiro*; Honda, Tetsutaro*

Journal of Nuclear Science and Technology, 37(12), p.1075 - 1081, 2000/12

no abstracts in English

Journal Articles

LWR fuel safety research with paticular emphasis on RIA/LOCA and other conditions

Ichikawa, Michio; ; Kawasaki, Satoru

Journal of Nuclear Science and Technology, 26(1), p.118 - 125, 1989/01

no abstracts in English

Journal Articles

The Japan Power Demonstration Reactor decommissioning programme

Tanaka, Mitsugu; Yanagihara, Satoshi; Ishikawa, Michio; Kawasaki, Minoru

Proc. Int. Conf. on Decommissioning of Major Radioactive Facilities, p.25 - 31, 1988/00

no abstracts in English

Journal Articles

JPDR decommissioning program

Ishikawa, Michio; Kawasaki, Minoru

Enerugi Rebyu, 7(6), p.2 - 6, 1987/00

no abstracts in English

Oral presentation

Study on the reduction of anisotropic emission from $$^{241}$$Am-Be neutron source

Kowatari, Munehiko; Onuma, Isamu; Kawasaki, Katsuya; Tanimura, Yoshihiko; Saegusa, Jun; Yoshizawa, Michio

no journal, , 

no abstracts in English

31 (Records 1-20 displayed on this page)