Refine your search:     
Report No.
 - 
Search Results: Records 1-33 displayed on this page of 33
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

JAEA Reports

Data of long term hydro-pressure monitoring on Tono Regional Hydrogeological Study Project for fiscal year 2010

Karino, Tomoyuki; Takeuchi, Ryuji

JAEA-Data/Code 2012-001, 54 Pages, 2012/07

JAEA-Data-Code-2012-001.pdf:2.77MB
JAEA-Data-Code-2012-001-appendix(CD-ROM).zip:108.63MB

Tono Regional Hydrogeological Study (RHS) Project is a one of the geoscientific research programme at Tono Geoscience Center (TGC). This project started since April, 1992 and main investigations were finished to March 2004. Since 2005, hydrogeological and hydrochemical monitoring are continued by the existing monitoring system. This paper describes the results of the long term hydro-pressure monitoring from April, 2010 to March, 2011.

JAEA Reports

Data of long term hydro-pressure monitoring on Mizunami Underground Research Laboratory Project for fiscal year 2010

Karino, Tomoyuki; Takeuchi, Ryuji

JAEA-Data/Code 2012-002, 110 Pages, 2012/07

JAEA-Data-Code-2012-002.pdf:4.8MB
JAEA-Data-Code-2012-002-appendix(DVD-ROM).zip:314.86MB

Mizunami Underground Research Laboratory (MIU) Project has three overlapping phases: Surface-based investigation phase (Phase I), Construction phase (Phase II), and Operation phase (Phase III), with a total duration of 20 years. The main goals of the MIU Project from Phase I through to Phase III are: to establish techniques for investigation, analysis and assessment of the deep geological environment, and to develop a range of engineering for deep underground application. Currently, the project is being carried out under the Phase II. One of the Phase II goals is set to develop and revise models of the geological environment using the investigation results obtained during excavation, and determine and assess the changes in the geological environment in response to excavation. The long term hydro-pressure monitoring has been continued to achieve the Phase II goals. This paper describes the results of the long term hydro-pressure monitoring from April, 2010 to March, 2011.

JAEA Reports

Hydrochemical investigation at the Mizunami Underground Research Laboratory; Compilation of groundwater chemistry in the Mizunami group and Toki granite (fiscal year 2010)

Shingu, Shinya; Hagiwara, Hiroki; Masuda, Kaoru*; Iizuka, Masatoshi*; Inui, Michiharu*; Mizuno, Takashi

JAEA-Data/Code 2012-003, 50 Pages, 2012/06

JAEA-Data-Code-2012-003.pdf:4.61MB
JAEA-Data-Code-2012-003-appendix(CD-ROM).zip:226.3MB

Japan Atomic Energy Agency has been investigated the groundwater chemistry on excavating the underground facilities as part of the Mizunami Underground Research Laboratory (MIU) Project at Mizunami City, Gifu Prefecture, Japan. This report compiles data set of the groundwater chemistry obtained at MIU in the fiscal year 2010. In terms of ensuring traceability of data, basic information (e.g. sampling location, sampling date, sampling method, analytical method) and methodology for quality control is described.

JAEA Reports

Monitoring of pore water pressure and groundwater chemistry at MSB-2 and MSB-4 boreholes in the MIU construction site; April, 2004 - March, 2006

Mizuno, Takashi; Iwatsuki, Teruki; Amano, Yuki; Hama, Katsuhiro

JAEA-Data/Code 2012-004, 30 Pages, 2012/06

JAEA-Data-Code-2012-004.pdf:3.68MB
JAEA-Data-Code-2012-004-appendix(CD-ROM).zip:3.7MB

Japan Atomic Energy Agency has been carried out investigations to understand the fluctuation of groundwater chemistry related to the shafts excavation at the Mizunami Underground Research Laboratory (MIU) in Mizunami City, Gifu prefecture, Japan. We compiled data of pore water pressure, water temperature and groundwater chemistry obtained from two surface-based boreholes, MSB-2 and MSB-4 boreholes, installed a MP system (Westbay Instruments Inc.) from April 2003. Groundwater sampling and measurements of pore water pressure and water temperature have been conducted once in a month. In this report, the data of groundwater chemistry and pore water pressure obtained from these two boreholes are summarized for sharing and for avoiding the scattering the data.

JAEA Reports

Monitoring of pore water pressure and groundwater chemistry at MSB-2 and MSB-4 boreholes in the MIU construction site; April, 2010 - March, 2011

Hagiwara, Hiroki; Shingu, Shinya; Kurita, Kazuaki*; Eguchi, Keita*; Horita, Masakuni*; Mizuno, Takashi

JAEA-Data/Code 2012-005, 67 Pages, 2012/06

JAEA-Data-Code-2012-005.pdf:3.42MB
JAEA-Data-Code-2012-005-appendix(CD-ROM).zip:0.74MB

Japan Atomic Energy Agency has been carried out investigations to understand the fluctuation of groundwater chemistry related to the shafts excavation at the Mizunami Underground Research Laboratory in Mizunami City, Gifu prefecture, Japan. The data for pore water pressure, water temperature and groundwater chemistry have been provided from two surface-based boreholes, MSB-2 and MSB-4 boreholes, installed a modular multilevel groundwater monitoring system (MP system). The monitoring has been conducted once in a month since April 2003. According to the results, the shaft excavation has caused drawdown of the hydraulic head and change in the groundwater chemistry in the MIU construction site. In this report, the data of monitoring at the MSB-2 and the MSB-4 boreholes from April 2010 to March 2011 were compiled. In addition, the monitoring results at the DH-2 borehole as part of Regional Hydrogeological Study project, are summarized as an appendix.

JAEA Reports

Update of JAEA-TDB; Additional selection of thermodynamic data for solid and gaseous phases on nickel, selenium, zirconium, technetium, thorium, uranium, neptunium plutonium and americium, update of thermodynamic data on iodine, and some modifications

Kitamura, Akira; Fujiwara, Kenso; Doi, Reisuke; Yoshida, Yasushi*

JAEA-Data/Code 2012-006, 65 Pages, 2012/07

JAEA-Data-Code-2012-006.pdf:1.72MB
JAEA-Data-Code-2012-006-appendix(CD-ROM).zip:0.19MB

We additionally selected thermodynamic data for solid and gaseous phases of nickel, selenium, zirconium, technetium, thorium, uranium, neptunium, plutonium and americium to our thermodynamic database JAEA-TDB for geological disposal of radioactive waste of high-level and TRU wastes. We thermodynamically obtained equilibrium constant from addition and subtraction of Gibbs free energy of formation, which were selected in the thermochemical database project by the Nuclear Energy Agency in the Organisation for Economic Co-operation and Development. Furthermore, we collected and updated thermodynamic data on iodine, changed master species of technetium(IV), and added thermodynamic data on selenium due to improving reliability of the thermodynamic database. We prepared text files of the updated thermodynamic database (JAEA-TDB) for geochemical calculation programs of PHREEQC, EQ3/6 and Geochemist's Workbench. These text files are contained in the attached CD-ROM and will be available on our Website.

JAEA Reports

Development of grout materials for a geological disposal system for high-level radioactive waste, 2

Kawaguchi, Masanao; Nakanishi, Tatsuro; Kishi, Hirokazu; Nobuto, Jun*; Yamada, Tsutomu*; Fujita, Tomoo; Hatanaka, Koichiro

JAEA-Data/Code 2012-007, 250 Pages, 2012/11

JAEA-Data-Code-2012-007.pdf:20.55MB

Cementitious materials are commonly used for rock support, lining, and grouting, their pH plume are considered to have an adverse effect on long-term safety of a geological disposal system. In addition, during the emplacement of waste package with buffer material, it is required to limit amount of groundwater inflow to a certain level by grouting. Therefore, it is necessary to develop new grout materials with penetrability for smaller fractures. We have developed new grout materials, which have better penetrability and are environmentally more friendly than exinting cementitious grout materials since FY 2007. This sequel report shows the most appropriate composition and the penetration characteristic of new grout materials to be suitable for the ${it in-situ}$ experiment based on the result of indoor test carried out after FY 2008.

JAEA Reports

Mizunami Underground Research Laboratory Project; Compilation of results of the borehole investigation at research galleries and shaft

Ueno, Takashi; Tokuyasu, Shingo; Kawamoto, Koji; Kuboshima, Koji; Ishibashi, Masayuki; Tsuruta, Tadahiko; Sasao, Eiji; Ikeda, Koki; Mikake, Shinichiro; Hara, Ikuo; et al.

JAEA-Data/Code 2012-008, 136 Pages, 2012/07

JAEA-Data-Code-2012-008.pdf:27.39MB
JAEA-Data-Code-2012-008(errata).pdf:1.55MB
JAEA-Data-Code-2012-008-appendix(DVD-ROM)-1.zip:790.9MB
JAEA-Data-Code-2012-008-appendix(DVD-ROM)-2.zip:834.48MB
JAEA-Data-Code-2012-008-appendix(DVD-ROM)-3.zip:533.98MB
JAEA-Data-Code-2012-008-appendix(DVD-ROM)-4.zip:712.56MB
JAEA-Data-Code-2012-008-appendix(DVD-ROM)-5.zip:525.5MB

This report compiles data of results from borehole investigations which has been carried out research gallery of Mizunami Underground Research Laboratory (MIU) in the fiscal year from 2005 to 2011. These data include results of core observation, geophysical logging, and so on.

JAEA Reports

Mizunami Underground Research Laboratory Project, Compilation of results of geological investigation at the shafts and research galleries

Kawamoto, Koji; Kuboshima, Koji; Ishibashi, Masayuki; Tsuruta, Tadahiko; Sasao, Eiji; Ikeda, Koki; Mikake, Shinichiro; Hara, Ikuo; Yamamoto, Masaru

JAEA-Data/Code 2012-009, 47 Pages, 2012/07

JAEA-Data-Code-2012-009.pdf:3.7MB
JAEA-Data-Code-2012-009-appendix(DVD-ROM)-1.zip:236.07MB
JAEA-Data-Code-2012-009-appendix(DVD-ROM)-2.zip:615.87MB
JAEA-Data-Code-2012-009-appendix(DVD-ROM)-3.zip:45.88MB
JAEA-Data-Code-2012-009-appendix(DVD-ROM)-4.zip:115.54MB
JAEA-Data-Code-2012-009-appendix(DVD-ROM)-5.zip:230.55MB

This document presents the data of geological investigations in the shafts and research galleries to the depth of 300 m of the MIU from the 2004 fiscal year to the 2008 fiscal year. In the shafts and research galleries of the MIU, the Cretaceous Toki granite is unconformably overlain by the generally flat lying Miocene Mizunami Group (younging upwards from the Toki Lignite-bearing Formation to the Hongo and Akeyo Formations) with a depth of about 166 m to 168 m.

JAEA Reports

Emergency monitoring of environmental radiation and atmospheric radionuclides at Nuclear Science Research Institute, JAEA following the accident of Fukushima Daiichi Nuclear Power Plant

Okura, Takehisa; Oishi, Tetsuya; Taki, Mitsumasa; Shibanuma, Yukio; Kikuchi, Masamitsu; Akino, Hitoshi; Kikuta, Yasuaki; Kawasaki, Masatsugu; Saegusa, Jun; Tsutsumi, Masahiro; et al.

JAEA-Data/Code 2012-010, 37 Pages, 2012/05

JAEA-Data-Code-2012-010.pdf:2.28MB

Due to the accident at Fukushima Daiichi Nuclear Power Plant caused by the 2011 off the Pacific coast of Tohoku Earthquake occurred at 11th March 2011, the emergency environmental radiation monitoring was conducted at Nuclear Science Research Institute, Japan Atomic Energy Agency (JAEA). This report provides the monitoring results of ambient $$gamma$$-ray dose rate and atmospheric radioactivity concentration until the beginning of June 2011. Some anthropogenic radionuclides such as Cs-134, Cs-137, I-131, I-132, Te-132, Xe-133 and others were detected from air samples. The atmospheric radioactivity concentrations varied with some peaks corresponded with that of ambient $$gamma$$-ray dose rate after 15th March 2011. Composition of each peak showed various characteristic. Internal exposure caused by inhalation was estimated from the observed atmospheric radioactivity.

JAEA Reports

ORION-WIN; A Computer code to estimate environmental concentration and radiation dose due to airborne discharge of radioactive materials from nuclear facilities

Takeyasu, Masanori; Onuma, Toshimitsu; Sumiya, Shuichi

JAEA-Data/Code 2012-011, 28 Pages, 2012/07

JAEA-Data-Code-2012-011.pdf:1.22MB

A computer code, ORION-WIN, has been developed to estimate environmental concentration and radiation dose to the public due to the airborne release of radioactive materials from multiple sources of nuclear fuel cycle facilities. The modified Gaussian plume model is applied to calculate atmospheric dispersion of the released radioactive material. The plume depletion processes such as gravitational settling, dry deposition, precipitation scavenging and radioactive decay are considered, and re-suspension from the ground and the produce of progeny from the parent radionuclides are also considered. Inhalation and oral intake are considered as internal pathways, and submersion in the radioactive cloud and external exposure to contaminated ground surface are considered as external pathways, respectively. Radiation dose to an individual is calculated.

JAEA Reports

Input/output manual of light water reactor fuel performance code FEMAXI-7 and its related codes

Suzuki, Motoe; Saito, Hiroaki*; Udagawa, Yutaka; Nagase, Fumihisa

JAEA-Data/Code 2012-012, 374 Pages, 2012/07

JAEA-Data-Code-2012-012.pdf:5.39MB
JAEA-Data-Code-2012-012-appendix(CD-ROM).zip:0.08MB

A light water reactor fuel analysis code FEMAXI-7 has been developed for the purpose of analyzing the fuel behavior in normal conditions and in anticipated transient conditions. Numerous functional improvements and extensions have been incorporated in FEMAXI-7, which has been fully disclosed in the code model description published recently as JAEA-Data/Code 2010-035. The present manual, which is the counterpart of this description, gives detailed explanations of operation method of FEMAXI-7 code and its related codes, methods of input/output, methods of source code modification, features of subroutine modules, and internal variables in a specific manner in order to facilitate users to perform a fuel analysis with FEMAXI-7.

JAEA Reports

Measurement of sorption, diffusion and pore physicality for granite sample

Kunimaru, Takanori; Morikawa, Keita; Tachi, Yukio; Kuno, Yoshio*; Hosoya, Shinichi*; Shimoda, Satoko*; Kato, Hiroyasu*; Nakazawa, Toshiyuki*; Ikuse, Hiroyuki*; Kubota, Masako*

JAEA-Data/Code 2012-013, 96 Pages, 2012/07

JAEA-Data-Code-2012-013.pdf:7.41MB
JAEA-Data-Code-2012-013(errata).pdf:0.13MB

For the purpose to understand the relationship between characteristic of mass transport and characteristic of fracture, the following experiments were carried out using core sample, which was sampled from the -300 m Stage. This paper compiled the results of these experiment. (1) Diffusion experiments of Cs, Sr, I and uranin in granite samples (2) Sorption experiments of Cs and Sr on crushed granite (3) Measurement of pore physicality by Mercury Intrusion and water saturation

JAEA Reports

Tables of nuclear data (JENDL/TND-2012)

Namekawa, Masakazu; Fukahori, Tokio

JAEA-Data/Code 2012-014, 206 Pages, 2012/08

JAEA-Data-Code-2012-014.pdf:1.82MB
JAEA-Data-Code-2012-014-appendix.zip:0.17MB

Several numerical data (mass, level energy, spin and parity, abundance, mass excess, beta-decay energy, and half-life) of nuclides were collected with each element into the "Tables of Nuclear Data (JENDL/TND-2012)." These tables are related to the "Chart of the Nuclides" published by Japanese Nuclear Data Committee and Nuclear Data Center of Japan Atomic Energy Agency (JAEA), and data of the nuclides synthesized in the chart. Moreover, new determinations are adopted instead of the values in ENSDF for half-lives of ground state of Se-79 and Sn-126.

JAEA Reports

Annual data compilation of water balance observation in the Regional Hydrogeological Study Project (RHS Project); For the fiscal year 2009

Takeda, Masaki; Takeuchi, Ryuji

JAEA-Data/Code 2012-015, 19 Pages, 2012/09

JAEA-Data-Code-2012-015.pdf:4.79MB
JAEA-Data-Code-2012-015-appendix(CD-ROM).zip:9.7MB

At the Tono Geoscientific Research Unit, the subsurface water balance observation has been carried out in order to estimate groundwater recharge rate for setting the upper boundary conditions on groundwater flow simulation and to obtain data for the calibration of the hydrogeological model. In the subsurface water balance observations, rainfall data and river flow rate have been observed in the Garaishi river area and the Hiyoshi river area. The missed data and data error in the monitoring data from the fiscal year 2009 were complemented or corrected, and these data were compiled in data set. Both of the observation data and compiled data are included in the data set, and the data set is recorded on DVD-ROM.

JAEA Reports

Annual data compilation of water balance observation in the Mizunami Underground Research Laboratory Project (MIU Project); From the fiscal year 2009

Takeda, Masaki; Takeuchi, Ryuji

JAEA-Data/Code 2012-016, 39 Pages, 2012/09

JAEA-Data-Code-2012-016.pdf:6.55MB
JAEA-Data-Code-2012-016-appendix(CD-ROM)-1.zip:76.62MB
JAEA-Data-Code-2012-016-appendix(CD-ROM)-2.zip:68.95MB

At the Tono Geoscientific Research Unit, the subsurface water balance observation has been carried out in order to estimate groundwater recharge rate for setting the upper boundary conditions on groundwater flow simulation and to obtain data for the calibration of the hydrogeological model. In the subsurface water balance observations, meteorological data, river flow rate, groundwater level and soil moisture to estimate precipitation and evapotranspiration have been observed in the Shoba river area, the Shoba river model area and MIU Construction Site. After missed data and data error in the monitoring data from the fiscal year 2009 were complemented or corrected, the data was compiled in data set. Both of the observation data and compiled data are included in the data set, and the data set is recorded on DVD-ROM.

JAEA Reports

Development of helium isotopic database in Japan

Kusano, Tomohiro; Asamori, Koichi; Umeda, Koji

JAEA-Data/Code 2012-017, 19 Pages, 2012/09

JAEA-Data-Code-2012-017.pdf:1.73MB
JAEA-Data-Code-2012-017-appendix(CD-ROM).zip:0.29MB

We constructed "Helium Isotopic Database in Japan", which includes isotope ratios of noble gases and chemical compositions of gas samples collected from hot springs and water wells. The helium isotopes are excellent natural tracers for indicating the presence of mantle derived volatiles, because they are chemically inert and thus conserved in crustal rock-water systems. It is common knowledge that mantle degassing does not occur homogeneously over the Earth's surface. The $$^{3}$$He/$$^{4}$$He ratios higher than the typical crustal values are interpreted to indicate that transfer of mantle volatiles into the crust by processes or mechanisms such as magmatic intrusion, faulting. In particular the spatial variation of helium isotope ratios could provide a valuable information to identify volcanic regions and tectonically active areas. The database was compiled geochemical data of groundwater from 108 published papers. As a result of the data compiling, the database has 1728 Helium isotopic data.

JAEA Reports

Estimation of fuel compositions in Fukushima-Daiichi Nuclear Power Plant

Nishihara, Kenji; Iwamoto, Hiroki; Suyama, Kenya

JAEA-Data/Code 2012-018, 190 Pages, 2012/09

JAEA-Data-Code-2012-018.pdf:3.2MB
JAEA-Data-Code-2012-018-appendix(CD-ROM).zip:2.57MB

This document describes the analytical results of the amount of the radioactive nuclides in the Fukushima-Daiichi Nuclear Power Plant on March 31, 2011 and the following period with the use of the ORIGEN2 code. The results are given for the irradiated uranium pellet and the cladding tube of zirconium alloy in the core and the spent fuel storage pools of the respective reactors. The evaluated values are weight, radioactivity, heat generation, photon generation and neutron generation rate.

JAEA Reports

Collection of URL measurement data in 2010 fiscal year at the Horonobe Underground Research Laboratory Project

Inagaki, Daisuke; Sawada, Sumiyuki; Tokiwa, Tetsuya; Tsusaka, Kimikazu; Amano, Yuki; Niinuma, Hiroaki*

JAEA-Data/Code 2012-019, 137 Pages, 2012/09

JAEA-Data-Code-2012-019.pdf:8.25MB
JAEA-Data-Code-2012-019-appendix(DVD-ROM)-1.zip:1396.83MB
JAEA-Data-Code-2012-019-appendix(DVD-ROM)-2.zip:876.34MB
JAEA-Data-Code-2012-019-appendix(DVD-ROM)-3.zip:1053.87MB
JAEA-Data-Code-2012-019-appendix(DVD-ROM)-4.zip:853.24MB
JAEA-Data-Code-2012-019-appendix(DVD-ROM)-5.zip:657.5MB

In the Horonobe Underground Research Laboratory (URL) Project, construction of the ventilation shaft, the east shaft and the drifts has been conducted as a phase 2 research. In the research, observation of the lithofacies and fracture, and in-situ tests, simple elastic wave exploration, schmidt hammer test, equotip test, point load test are conducted in each face, and measuring instruments such as extensometer, rock-bolt axial force meter, shotcrete stress meter and tunnel lining concrete stress meter are installed in particular face. In addition, for the purpose of the validation of the results of predictive analysis, conducted in phase 1, about the amount of spring water during construction of underground facilities, data on the changes of amount of spring water and water quality is obtained. This report summarizes the measurements data acquired at the east shaft (GL-210 m - 250 m) and the 250 m Gallery.

JAEA Reports

Results of single borehole hydraulic testing in Mizunami Underground Research Laboratory Project (Phase 2)

Daimaru, Shuji; Takeuchi, Ryuji; Onoe, Hironori; Saegusa, Hiromitsu

JAEA-Data/Code 2012-020, 44 Pages, 2012/09

JAEA-Data-Code-2012-020.pdf:6.96MB

This report summarize the results of the single borehole hydraulic tests of 79 sections conducted as part of the Construction phase (Phase 2) in the Mizunami Underground Research Laboratory (MIU) Project. The details of each test (test interval depth, geology, etc.) as well as the interpreted hydraulic parameters and analytical method used are presented in this report.

JAEA Reports

ORION-WIN; A Computer code to estimate environmental concentration and radiation dose due to airborne discharge of radioactive materials from nuclear facilities

Takeyasu, Masanori; Onuma, Toshimitsu; Sumiya, Shuichi

JAEA-Data/Code 2012-021, 29 Pages, 2012/09

JAEA-Data-Code-2012-021.pdf:1.42MB

A computer code, ORION-WIN, has been developed to estimate environmental concentration and radiation dose to public due to airborne discharge of radioactive materials from multiple sources of nuclear fuel cycle facilities. The modified Gaussian plume model is applied to calculate atmospheric dispersion of the discharged radioactive material. The plume depletion processes such as gravitational settling, dry deposition, precipitation scavenging and radioactive decay are considered. Inhalation and oral intake are considered as internal pathways, and submersion in the radioactive cloud and external exposure to contaminated ground surface are considered as external pathways, respectively. Radiation dose to an individual is calculated. ORION-WIN is an updated version of ORION-II and runs on PC mounting Windows OS, and has a graphical user interface for inputting the parameters and referring output files.

JAEA Reports

Material physical properties of 11Cr-ferritic/martensitic steel (PNC-FMS) wrapper tube materials

Yano, Yasuhide; Kaito, Takeji; Otsuka, Satoshi; Tanno, Takashi; Uwaba, Tomoyuki; Koyama, Shinichi

JAEA-Data/Code 2012-022, 51 Pages, 2012/09

JAEA-Data-Code-2012-022.pdf:2.32MB

It is necessary to develop core materials for fast reactors in order to achieve high-burnup. Ferritic steels are expected to be good candidate core materials to achieve this objective because of their excellent void swelling resistance. Therefore, oxide dispersion strengthened (ODS) ferritic steel and 11Cr-ferritic/martensitic steel (PNC-FMS) have been respectively developed for cladding and wrapper tube materials in Japan Atomic Energy Agency. In this study, various physical properties of PNC-FMS wrapper materials were measured and equations and future standard measurement technique of physical properties for the design and evaluation were conducted.

JAEA Reports

Development of ESRAD program for estimation of spatial radioactivity distribution based on Kriging; User's manual

Ishigami, Tsutomu; Mukai, Masayuki; Sukegawa, Takenori; Matsubara, Takeshi*

JAEA-Data/Code 2012-023, 83 Pages, 2012/11

JAEA-Data-Code-2012-023.pdf:5.51MB

Verification for site release is one of procedures to confirm termination of decommissioning of nuclear installations. The verification procedure would need to confirm that the radioactive concentration at the site is lower than the criterion value by measurement. Then to efficiently perform the measurement and verification it is one of important issues how to efficiently estimate and evaluate overall spatial radioactivity distribution using a sampling method. For the efficient estimation and evaluation we have applied a Kriging technique which in the geostatistics, and have developed a computer program ESRAD (Estimation of Spatial RadioActivity Distribution). The ESRAD program is designed to support sample selection, calculate a variogram, and estimate a radioactivity distribution for the area concerned. This report describes the Kriging technique, structure and functions of ESRAD, input file format, output examples, execution procedure of ERSAR, and sample run with ESRAD.

JAEA Reports

Crustal deformation analysis by using GPS observation data in the northern Hokkaido, Japan

Tokiwa, Tetsuya; Sugimoto, Shingo*

JAEA-Data/Code 2012-024, 53 Pages, 2012/12

JAEA-Data-Code-2012-024.pdf:5.36MB

GPS analysis was carried out to understand the characteristics of the crustal movement in the northern Hokkaido, Japan. GPS data from 33 stations were used for this analysis. The analysis covered data during the period from October 2000 to October 2010. The results of this analysis indicate that this area is in nearly E-W compressive stress field. In addition, dilatation rate and maximum shear strain rate is -70$$sim$$-10$$times$$10$$^{-9}$$ and 50$$sim$$120$$times$$10$$^{-9}$$ strain/year, respectively.

JAEA Reports

Mizunami Underground Research Laboratory Project; Compilation of results of geological investigation at the shafts and research galleries from the depth of 300m to 500m

Kawamoto, Koji; Kuboshima, Koji; Ishibashi, Masayuki; Tsuruta, Tadahiko; Sasao, Eiji; Ikeda, Koki; Mikake, Shinichiro; Hara, Ikuo; Yamamoto, Masaru

JAEA-Data/Code 2012-025, 32 Pages, 2013/01

JAEA-Data-Code-2012-025.pdf:3.03MB
JAEA-Data-Code-2012-025-appendix.zip:126.32MB

This document presents the data of geological investigations in the shafts and research galleries from the depth of 300m to 500m of the MIU from the 2008 fiscal year to the 2011 fiscal year. In the shafts and research galleries of the MIU, although the Cretaceous Toki granite is distributed, pegmatite, aplite and lampropyre dike are distributed partially.

JAEA Reports

Log of refining and conversion facility dismantling; Progress in 2011FY

Editorial Committee of Refining and Conversion Facility Decommissioning Results

JAEA-Data/Code 2012-026, 78 Pages, 2013/01

JAEA-Data-Code-2012-026.pdf:26.08MB

The Refining and Conversion Facility located in the Ningyo-toge Environmental Engineering Center had the natural uranium conversion process and reprocessed uranium conversion process. The construction of this facility was started in 1979 and completed in October 1981. Dismantling of equipments in radiation controlled area of this facility was started from 2008. Equipments in radiation controlled area (excluding ventilating equipment and liquid waste treatment equipment) will be dismantled by the 2011 fiscal year, and ventilating equipment and liquid waste treatment equipment will be dismantled by the 2014 fiscal year. This report is a record of the dismantlement situation of the Refining and Conversion Facility in 2011 fiscal years. Concretely, dismantlement logs, dismantlement material, and secondary waste are published.

JAEA Reports

Development of internal dosimetry evaluation code for chronic exposure

Kimura, Masanori; Kinase, Sakae; Hato, Shinji*

JAEA-Data/Code 2012-027, 27 Pages, 2013/02

JAEA-Data-Code-2012-027.pdf:2.33MB

The Fukushima Daiichi Nuclear Power Plant accident resulted in a wide range of radioactive contamination. As a result, the public concerns the internal doses for chronic exposure due to intake in daily life. To reduce some concerns, it is important to develop the evaluation method of chronic internal dose. The JAEA developed the DSYS code that calculates internal dose to the public with dose coefficients and treats dose assessment of internal exposure due to acute intake based on the ICRP's Publications (Publ.30, 56, 66, 67, 69, 71, 72). Therefore, it cannot apply to the evaluation of whole-body retention values or committed effective/equivalent dose for chronic exposure. In the present study, the authors considered the evaluation method of chronic internal dose and developed the DSYS-Chronic to evaluate chronic internal dose by incorporating into the DSYS code. This report shows the outline of the DSYS-Chronic code and the example of evaluation results.

JAEA Reports

Development of database on circular abandoned channel in Japan

Takatori, Ryoichi; Yasue, Kenichi; Tanikawa, Shinichi*; Ninomiya, Atsushi*; Tanase, Atsushi*

JAEA-Data/Code 2012-028, 15 Pages, 2013/03

JAEA-Data-Code-2012-028.pdf:34.12MB
JAEA-Data-Code-2012-028-appendix(CD-ROM).zip:0.52MB

To develop a method for estimating late Quaternary uplift rates of inland mountainous terrains where fluvial terraces are poorly developed, we focused on "circular abandoned channels", formed by meander cut-offs or river capture of an incised meandering river. We studied about 1,000 circular abandoned channels distributed throughout the Islands of Japan, and developed GIS database on circular abandoned channel in Japan. This database contains formation process, relative heights, degree of dissection and bedrocks of circular abandoned channels. Circular abandoned channels are distributed in inland mountainous terrains, where late Quaternary uplift rates are unknown, and indicate different relative heights along the same river. Relative heights tend to correlate with degree of dissection of the circular abandoned channels, which may indicate that degree of dissection correlate with ages of abandonment of circular abandoned channels.

JAEA Reports

Collection of URL measurement data in 2011 fiscal year at the Horonobe Underground Research Laboratory Project

Inagaki, Daisuke; Tokiwa, Tetsuya; Murakami, Hiroaki

JAEA-Data/Code 2012-029, 132 Pages, 2013/02

JAEA-Data-Code-2012-029.pdf:8.0MB
JAEA-Data-Code-2012-029-appendix(DVD-ROM)-1.zip:5339.82MB
JAEA-Data-Code-2012-029-appendix(DVD-ROM)-2.zip:4415.05MB
JAEA-Data-Code-2012-029-appendix(DVD-ROM)-3.zip:127.72MB

In the Horonobe Underground Research Laboratory (URL) Project, construction of the Ventilation Shaft, the East Shaft and the drifts has been conducted as a phase 2 research. In the research, observation of the lithofacies and fracture, and ${it in-situ}$ tests, simple elastic wave exploration, schmidt hammer test, equotip test, point load test are conducted in each face, and measuring instruments such as extensometer, rock-bolt axial force meter, shotcrete stress meter and tunnel lining concrete stress meter are installed in particular face. In addition, for the purpose of the validation of the results of predictive analysis, conducted in phase 1, about the amount of spring water during construction of underground facilities, data on the changes of amount of spring water and water quality is obtained. This report summarizes the measurements data acquired at the Ventilation Shaft, the East shaft and the 250 m Gallery.

JAEA Reports

Code-B-2 for stress calculation for SiC-TRISO fuel particle

Aihara, Jun; Ohashi, Hirofumi; Sawa, Kazuhiro; Tachibana, Yukio

JAEA-Data/Code 2012-030, 13 Pages, 2013/02

JAEA-Data-Code-2012-030.pdf:1.18MB

We have developed Code-B-2 for the prediction of pressure vessel failure probabilities of SiC-tri-isotropic (TRISO) coated fuel particles for the high temperature gas-cooled reactors (HTGRs) under operation by modification of an existing code, Code-B-1. We have modified internal pressure calculation part of Code-B-1 to treat fluctuation of irradiation temperature for Code-B-2. In addition, we have added part of calculation of irradiation creep constants and irradiation swelling rates of PyC layers, which are very important for stress calculation. In this report, we first describe on details of Code-B-2. Next, we calculate a property of PyC (Bacon anisotropic factor (BAF) value) for Code-B-2, which is used for calculation of failure probabilities of Japanese high-quality SiC-TRISO fuel particles under operation with a method we have suggested.

JAEA Reports

Radioactivity analysis of metal samples taken from pipes of the Fugen

Haraga, Tomoko; Kameo, Yutaka; Ishimori, Kenichiro; Shimada, Asako; Tobita, Minoru*; Takahashi, Shigemi*; Takahashi, Kuniaki

JAEA-Data/Code 2012-031, 39 Pages, 2013/02

JAEA-Data-Code-2012-031.pdf:9.28MB

The Fugen Nuclear Power Station was shut down and decommissioning of the Fugen has been implemented. To calculate the scaling factor of radioactive waste or advance the clearance of dismantled materials, a large number of radioactivity concentration data of dismantled materials have to be accumulated. For these reasons, the simple and rapid radioactivity determination method was applied for metal samples, which were taken from pipes of the Fugen. The present report is summarized analytical procedures and obtained radioactivity data of the Fugen pipe samples.

JAEA Reports

A Set of ORIGEN2 cross section libraries based on JENDL-4.0; ORLIBJ40

Okumura, Keisuke; Sugino, Kazuteru; Kojima, Kensuke; Jin, Tomoyuki*; Okamoto, Tsutomu; Katakura, Junichi*

JAEA-Data/Code 2012-032, 148 Pages, 2013/03

JAEA-Data-Code-2012-032.pdf:6.99MB

A set of cross section libraries for the isotope generation and depletion calculation code ORIGEN2 was produced by using recent nuclear data JENDL-4.0. In this new library (ORLIBJ40), neutron-induced cross sections, fission product yields, isomeric ratios and half-lives were updated. ORLIBJ40 includes 24 libraries for typical UO$$_{2}$$ or MOX fuels of PWR and BWR. In addition, it includes 36 libraries for various fast reactor fuels. ORLIBJ40 was applied to the post irradiation examination analyses of LWR nuclear spent fuels. As a result, it was confirmed that improvements were achieved especially for inventory and radioactivity estimations of minor actinides (Am and Cm isotopes) and fission products sensitive to cross sections (Eu and Sm isotopes) and for long-lived fission products ($$^{79}$$Se, etc.), compared with other existing ORIGEN2 libraries.

JAEA Reports

Crustal deformation analysis by using GPS observation data before and after Tohoku-oki Earthquake in northern Hokkaido, Japan

Tokiwa, Tetsuya; Sugimoto, Shingo*

JAEA-Data/Code 2012-033, 28 Pages, 2013/03

JAEA-Data-Code-2012-033.pdf:10.56MB

GPS analysis was carried out to understand the characteristics of the crustal deformation due to the Tohoku-oki Earthquake in the northern Hokkaido, Japan. The data period for the analysis is from October 1, 2010 to May 31, 2011. The result of the analysis indicated that the displacement in the direction of the south-southeast was detected in this area, and the amount of displacement of the western side of northern Hokkaido is relatively larger than that of the eastern side. Therefore, the eastern side of northern Hokkaido was displaced to the north with respect to Horonobe area, and the west side was displaced to the south. Although the analysis period is short, the crustal deformation is different from a seismic crustal deformation showing the E-W crustal compression.

33 (Records 1-33 displayed on this page)
  • 1