Atomic Energy Society of Japan最新文献_第6页

Chemical State Analysis of Rhodium in Simulated Waste Glass by Synchrotron-Radiation-based XAFS and Imaging XAFS Techniques 利用同步辐射XAFS和成像XAFS技术分析模拟废玻璃中铑的化学状态

Atomic Energy Society of Japan Pub Date : 2017-01-01 DOI: 10.3327/TAESJ.J16.024

Y. Okamoto, T. Nagai, H. Shiwaku, Takehiko Inose, Sato Seiichi

引用次数: 0

Estimation of Xe-135, I-131, I-132, I-133 and Te-132 Concentrations in Plumes at Monitoring Posts in Fukushima Prefecture Using Pulse Height Distribution Obtained from NaI(Tl) Detector 利用NaI(Tl)脉冲高度分布估算福岛县监测站烟羽中Xe-135、I-131、I-132、I-133和Te-132浓度

Atomic Energy Society of Japan Pub Date : 2017-01-01 DOI: 10.3327/taesj.j16.014

H. Hirayama, H. Matsumura, Y. Namito, T. Sanami

{"title":"Estimation of Xe-135, I-131, I-132, I-133 and Te-132 Concentrations in Plumes at Monitoring Posts in Fukushima Prefecture Using Pulse Height Distribution Obtained from NaI(Tl) Detector","authors":"H. Hirayama, H. Matsumura, Y. Namito, T. Sanami","doi":"10.3327/taesj.j16.014","DOIUrl":"https://doi.org/10.3327/taesj.j16.014","url":null,"abstract":"The Xe-135, I-131, I-132, I-133 and Te-132 concentrations in plumes at the monitoring posts in Fukushima prefecture in March 2011 were estimated using the pulse height distribution obtained from a NaI (Tl) detector, which were available to the public. Several corrections to the pulse height distribution were necessary owing to high count rates. The contribution to the count rates from each radionuclide except Xe-135 accumulated around each monitoring post was estimated using a method based on the time history of the peak count rate proposed by the authors. The concentration of each radionuclide in the plume was converted from the peak count rate using the response of the NaI (Tl) detector calculated with the egs5 code for a model of a plume containing a uniform distribution of radionuclides. The obtained time histories of Xe-135, I-131, I-132, I-133 and Te-132 concentrations in air at a fixed point in March 2011 were the first ones for Fukushima prefecture. The results at five monitoring posts near Fukushima Daiichi Nuclear Power Station were used to characterize radionuclides in the plume before March 15, soon after the accident. The results at three monitoring posts, Naraha-town Shoukan, Hirono-town Futatsunuma and Fukushima-city Momijiyama, which were analyzed during almost all of March, were used to characterize radionuclides in the plume in the period after March 14. It was fourd that Xe-135 was dominant on March 12 and Te-132 increased from March 13. For the radionuclides of iodine, I-131, I-132 and I-133 were detected with almost the same concentration for the first few days after the reactor shutdown.","PeriodicalId":8595,"journal":{"name":"Atomic Energy Society of Japan","volume":"54 1","pages":"1-14"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81314300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Evaluation of Influence of Splay Fault Growth on Groundwater Flow around Geological Disposal System 斜断层发育对地质处置系统周边地下水流动影响的评价

Atomic Energy Society of Japan Pub Date : 2017-01-01 DOI: 10.3327/TAESJ.J16.003

Shizuka Takai, S. Takeda, Ryutaro Sakai, T. Shimada, M. Munakata, T. Tanaka

{"title":"Evaluation of Influence of Splay Fault Growth on Groundwater Flow around Geological Disposal System","authors":"Shizuka Takai, S. Takeda, Ryutaro Sakai, T. Shimada, M. Munakata, T. Tanaka","doi":"10.3327/TAESJ.J16.003","DOIUrl":"https://doi.org/10.3327/TAESJ.J16.003","url":null,"abstract":"In geological disposal, the direct effect of active faults on geological repositories is avoided at the stage of site characterization; however, uncertainty remains for the avoidance of faults derived from active faults, which are concealed deep under the ground and are dif ﬁ cult to detect by site investigation. In this research, the in ﬂ uence of the growth of undetected splay faults on a natural barrier in a geological disposal system due to the future action of faults was evaluated. We investigated examples of splay faults in Japan and set conditions for the growth of splay faults. Furthermore, we assumed a disposal site composed of sedimentary rock and made a hydrogeological model of the growth of splay faults. We carried out groundwater ﬂ ow analyses, changing parameters such as the location and depth of the repository and the growth velocity of splay faults. The results indicate that the main ﬂ ow path from the repository is changed into an upward ﬂ ow along the splay fault due to its growth and that the average velocity to the ground surface becomes one or two orders of magnitude higher than that before its growth. The results also suggest that splay fault growth leads to the possibility of the downward ﬂ ow of oxidizing groundwater from the ground surface area.","PeriodicalId":8595,"journal":{"name":"Atomic Energy Society of Japan","volume":"44 1","pages":"34-48"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74218159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrogen Absorption Behavior on Zirconium under γ-Radiolysis of Nitric Acid Solution 硝酸溶液γ-辐射溶解作用下锆的吸氢行为

Atomic Energy Society of Japan Pub Date : 2017-01-01 DOI: 10.3327/TAESJ.J16.018

Y. Ishijima, F. Ueno, H. Abe

引用次数: 0

隆起・侵食による地質・地表環境の長期的変動を考慮した地層処分の安全評価手法の開発考虑到隆起、侵蚀造成的地质、地表环境的长期变动，开发地层处置的安全评价方法

Atomic Energy Society of Japan Pub Date : 2017-01-01 DOI: 10.3327/TAESJ.J16.010

K. Wakasugi, M. Yamaguchi, S. Koo, Fumiya Nagao, Tomoko Kato, Yuji Suzuki, T. Ebashi, H. Umeki, Y. Niibori

引用次数: 0

Proposal of Evaluation Methodology of Multiple-Failure-Initiating Events for Seismic PRA 地震PRA多失效启动事件评价方法的建议

Atomic Energy Society of Japan Pub Date : 2017-01-01 DOI: 10.3327/TAESJ.J16.013

H. Muta, K. Muramatsu, Y. Kameko, H. Miura, K. Ogura, Tsuyoshi Uchida

引用次数: 1

Simulation of Fuel-Coolant Interaction SERENA2 Test based on JASMINE Version 3 基于JASMINE Version 3的燃油-冷却剂相互作用SERENA2试验仿真

Atomic Energy Society of Japan Pub Date : 2017-01-01 DOI: 10.3327/taesj.j16.028

Akitoshi Hotta, Akinobu Morita, M. Kajimoto, Y. Maruyama

{"title":"Simulation of Fuel-Coolant Interaction SERENA2 Test based on JASMINE Version 3","authors":"Akitoshi Hotta, Akinobu Morita, M. Kajimoto, Y. Maruyama","doi":"10.3327/taesj.j16.028","DOIUrl":"https://doi.org/10.3327/taesj.j16.028","url":null,"abstract":"Among twelve FCI cases examined in the OECD / NEA / CSNI / SERENA2 test series using two facilities, six steam explosion cases, ﬁve from TROI and one from KROTOS, were analyzed by JASMINE V.3. The major model parameters were categorized into the “focused zone”, i,e., the core part of interest, and the “peripheral zone”, corresponding to the initial and boundary conditions given intentionally for each test case. For the former, base values established through past validation studies of JASMINE V.3 were applied. The code was modiﬁed to implement the measured distribution of the entrained droplet size acquired in TROI – VISU. For the latter, melt release histories were given as a combination of time tables of jet diameter and release velocity that were estimated from image data and transit timing data of the melt leading edge. The base values were shown to predict impulse re-sponses of SERENA2 systematically with a reasonable error band. A statistical analysis based on the LHS method was performed. Uncertainty ranges were given on the basis of measurement errors and past validation studies in the development of JASMINE. Underlying mechanisms causing apparent differences in the mechanical energy conversion ratio between two facilities were studied from the viewpoint of breakup length and trigger timing.","PeriodicalId":8595,"journal":{"name":"Atomic Energy Society of Japan","volume":"16 1","pages":"139-152"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86885892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Analysis of the Effects of Multiple Radionuclide Plumes under Severe Accident Conditions on Environment around a Site Boundary 严重事故条件下多重放射性核素羽流对场址边界环境的影响分析

Atomic Energy Society of Japan Pub Date : 2017-01-01 DOI: 10.3327/taesj.j16.033

Kyoko Funayama, M. Kajimoto

{"title":"Analysis of the Effects of Multiple Radionuclide Plumes under Severe Accident Conditions on Environment around a Site Boundary","authors":"Kyoko Funayama, M. Kajimoto","doi":"10.3327/taesj.j16.033","DOIUrl":"https://doi.org/10.3327/taesj.j16.033","url":null,"abstract":"In TEPCO’s Fukushima Dai-ichi Nuclear Power Station accident on March 11, 2011, a massive number of radionuclides were released from Unit–1, Unit–2, and Unit–3 to the environment. After the accident, the effects of multiple sources became one of the major topics of discussion in safety assessment. However, these discussions mainly focused on core damage frequencies. In the case of simultaneous accidents at multiple units, it is important to consider not only core damage frequencies but also risks because radionuclides are released from multiple units to the environment. In this study, we analyzed dominant parameters that affect health in the case of multiple sources with a simplified configuration of units. The analytical results show that the probabilities of early health effects near the site boundary depend on the locations of units and the wind direction at the site. They also show that the probabilities of early health effects due to releases from multiple units cannot be calculated by the arithmetic summation of probabilities of early health effects due to releases from single units because, for example, of the nonlinearity due to the threshold of the occurrence probability of early health effects.","PeriodicalId":8595,"journal":{"name":"Atomic Energy Society of Japan","volume":"35 1","pages":"191-196"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89731152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of inspection and repair techniques in reactor vessel of experimental fast reactor "Joyo": Retrieval of the bent test subassembly 实验快堆“卓越”号反应堆容器检修技术的发展:弯曲试验组件的检索

Atomic Energy Society of Japan Pub Date : 2016-10-06 DOI: 10.3327/TAESJ.J15.032

T. Ashida, Hideaki Ito, Kazuyuki Miyamoto, Toshiyuki Nakamura, K. Koga, Norikazu Oohara, Hiroichi Ino

引用次数: 0

Development of Security and Safety Fuel for Pu-burner HTGR 钚燃烧器HTGR安全与安全燃料的研制

Atomic Energy Society of Japan Pub Date : 2016-07-22 DOI: 10.1115/ICONE25-67530

S. Ueta

引用次数: 0