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Asami, Makoto*; Takahatake, Yoko; Myodo, Masato; Tobita, Takeshi; Kobayashi, Kiwami; Hayakawa, Misa; Usui, Yuka; Watahiki, Hiromi; Shibata, Atsuhiro; Nomura, Kazunori; et al.
JAEA-Data/Code 2017-001, 78 Pages, 2017/03
JAEA-Data-Code-2017-001.pdf:4.92MB
JAEA-Data-Code-2017-001-appendix(DVD-ROM).zip:818.06MB
At Fukushima Daiichi Nuclear Power Station owned by Tokyo Electric Power Company Holdings, Incorporated (TEPCO), contaminated water (accumulated, treated) secondary waste from water treatment, rubble and soil were collected and analyzed. The data already opened to public was collected as this report. The analytical data reported by TEPCO, Japan Atomic Energy Agency and International Research Institute for Nuclear Decommissioning until the end of March, 2016, was collected. Information on the samples and values of radioactive nuclide concentration and others were tabulated, besides figures, which show change in radioactive nuclide concentration for major nuclides, are contained. And, English translation and the collected data are provided as electric data.
Sawa, Kazuhiro; Tobita, Tsutomu*; Ueta, Shohei; Suzuki, Shuichi*; Sumita, Junya; Sekita, Kenji; Aoki, Kazunori*; Ouchi, Hiroshi
JAERI-Research 2001-002, 33 Pages, 2001/02
JAERI-Research-2001-002.pdf:1.42MB
no abstracts in English
Tanimoto, Kenichi; Aihara, Nagafumi; ; ; ; ;
JNC TN9410 99-002, 320 Pages, 1998/11
The estimation of the amount of radioactive waste produced from nuclear facilities in O-arai Engineering Center was performed for the purpose of using it for countermeasure of decommissioning planning. The conditions and the result of the estimation are as follows; (1)The total amount of occurrence of radioactive waste is 18,820tons. As the items of the amount in radioactive level, the amount of 1GBq/t and over is 820 tons and that of under 1GBq/t is 18,000 tons. (2)The amount of metal waste is 5,820 tons and the amount of concrete is 13,000 tons. (3)Above calculation was based on related specifications, complete drawings, and visual observation. (4)To dismantle facilities, it must exfoliate the surface of wall. As for the polluted zone and the zone with possibility of pollution, it decided to exfoliate 5 cm in thickness from the surface of the wall. And, as for the zone that fundamentally pollution was not there, it decided to exfoliate surface 1cm in thickness from the surface of the wall. (5)Using the suitable decontamination technology and exfoliation technology can reduce the amount of radioactive waste. (6)In the facilities dealing with sealed source judging from the past record of operation, there is no contact with the radioactive material, etc. Therefore, it can be disposed of all the waste that comes out from the facilities as non-radioactive waste.
Nozaki, Tatsuo; Torii, Tatsuo; Takada, Chie; Tobita, Kazunori; Ando, Hideki
PNC TN9410 96-262, 96 Pages, 1996/09
The basic research on large electron linear accelerator is under current investigation at Quantum Technology Development Facility in O-arai Engineering Center, Power Reactor and Nuclear Fuel Development Corporation. The result of this, the transmutation of fission products would be incorporated In the future demonstrative stage of the transmission of fission products, Nitrogen-13 and Oxygen-15 will be produced by the interaction between high energy bremsstrahlung and air during operation of the linac. The detection limits of conventional monitors are not sufficient for the limits of the concentration of Nitrogen-13 (6
10
Bq/cm
) and Oxygen-15 (610 Bq/cm) in exhaust air. Therefore we have developed a new type of gas monitor detector that is packed with plastic scintillation fibers as the detection elements to detect the limits of concentration of Nitrogen-13 and Oxygen-15 in exhaust air. On designing the gas monitor detectors, the sensitivities of the detectors were simulated to optimize the shape and the volume of detector by using EGS4, the Monte-Carlo code for electrons and photons. Based on the results of the simulations, the detectors were composed and the characteristic examinations of sensitivities were carried out by using beta-ray checking sources and Krypton-85 gas. Main points are as follows : (1) The detection limit of the developed torus-type detector for Krypton-85 is 5.410 Bq/cm based on the results of the experiments. (2) The counting efficiency of a detector for Nitrogen-13 is 40 percent higher than the counting efficiency for Krypton-85 based on the results of simulations. This indicates that the detection limit of the detector for Nitrogen-13 is about 3.9 10 Bq/cm. (3) The beta-ray energy of Oxygen-15 is higher than the beta-ray energy of Nitrogen-13. This theoretically reaches the conclusion that the detection limit of the detector for Oxygen-15 is lower than the ...
; Sumiya, Shuichi; ; ; ;
PNC TN8520 96-002, 54 Pages, 1996/09
A tool for meshing sphere arrangements was programmed in order to perform finite element calculations. Sphere arrangements are investigated in frame of the feasibility study of the sphere-pac nuclear fuel. One major concern of this study is the thermal conductivity of the arrangement. Further concerns are the mechanical behavior and sintering of the fuel. The thermal conductivity of the fuel was addressed with the computer code SPACON based on a unit cell approach and a radial heat flow experiment. However, a further approach using the finite element method is desirable, in order to better understanding the thermal flow through the package and to cross check with SPACON data and with experimental data. Also the mechanical behavior of the fuel could be addressed using the finite element technique.
; ; ; ; ; ; Sumiya, Shuichi
PNC TN8440 95-008, 159 Pages, 1995/04
Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed since 1975, based on "Safety Regulations for the Tokai Reprocessing Plant, Chapter VII - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitants due to the radioactivity discharged from the plant during January 1994 to March 1995. Appendices present comprehensive information, such as monitoring program, monitoring results, meteorological data and annual discharges from the plant.
; ; ; Sumiya, Shuichi; ; ; Yoshida, Mika
PNC TN8520 94-009, 763 Pages, 1994/10
This manual includes standard procedures for environmental sampling, sample preparation and radionuclide analyses. This seventh edition was added and modified a part of handling of analytical apparatus and general safety items. And analytical procedures of most nuclides were revised with the point of improving of reliabiliy. [First Edition PNCT N841-72-29 (August, 1972)] [Revision 1 PNCT 852-75-08 (March, 1975)] [Revision 2 PNCT 852-79-09 (April, 1979)] [Revision 3 PNCT N852-83-15 (June, 1983)] [Revision 4 PNCT N8520-86-11 (April, 1986)] [Revision 5 PNC TN8520-89-004 (August, 1989)]
; ; ; ; ; Kano, Yutaka; Yoshida, Mika
PNC TN8440 94-003, 157 Pages, 1994/03
Environmental radiation monitoring around the Tokai Reprocessing Plant has been performed since 1975, based on "Safety Regulations for the Tokai Reprocessing Plant, Chapter VII - Environmental Monitoring". This annual report presents the results of the environmental monitoring and the dose estimation to the hypothetical inhabitants due to the radioactivity discharged from the plant during 1993. Appendices present comprehensive information, such as monitoring program, monitoring results, meteorological data and annual discharges from the plant.
; ; ; ; ; ;
PNC TN8520 93-003, 410 Pages, 1994/01
This manual includes the standard procedures for analysis of radioactive materials and chemical polluants in liquid and gaseous waste elluent discharged into the environment from the nuclear facilities of Tokai Works of PNC. The third edition, PNC N852-84-06 was published in 1984. Almost all analytical procedures have been modified and new technique has been used for nine years, so the forth edition revised entirely was to be published this time. And most of analytical procedures will be revised with the point of improving of reliabiliy.
Sumiya, Shuichi; Morita, Shigemitsu; Tobita, Kazunori; Kurabayashi, Mizumi
Journal of Radioanalytical and Nuclear Chemistry, 177(1), p.149 - 159, 1994/01
Times Cited Count：18 Percentile：81.23(Chemistry, Analytical); ; ; ; ; Sumiya, Shuichi; ; Yoshida, Mika; ; Isozaki, Tokuju; et al.
PNC TN8440 93-027, 85 Pages, 1993/08
None
; ; ; Isozaki, Tokuju;
PNC TN8450 93-004, 144 Pages, 1993/06
Generally speaking, two kinds of water plumes which have different temperature, salinity and so on are not easily mixturred and have special boundary. So, it is possible to predict ocurrence of special boundary of sea water from observation of temperature, salinity of sea water. Not only marine environmental monitoring such as radioactivity analysis of sea water, sea-bed sediment, marine products but also observation of water current, water direction, surface and ventical observation of water temperature, salinity and so on in Tokai coastal area are carried out with some observation instruments by Environmental Protection Section, Tokai Works, PNC. The results of vertical observation from 1990 to 1991 are recorded in this report.
Morita, Shigemitsu; Tobita, Kazunori; Kurabayashi, Mizumi
Topical symposium on the behavior and utilization of technetium, 0 Pages, 1993/00
None
