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Seismic PRA for Japan Sodium-cooled Fast Reactor (JSFR)

鳴戸 健一*; 西野 裕之; 栗坂 健一; 山野 秀将; 岡野 靖; 岡村 茂樹*; 衛藤 将生*

Proceedings of 9th Korea-Japan Symposium on Nuclear Thermal Hydraulics and Safety (NTHAS-9) (CD-ROM), 10 Pages, 2014/11

Seismic Probabilistic Risk Assessment (PRA) is increasingly important in assessing the safety of nuclear power plants after the TEPCO's Fukushima Daiichi Nuclear Power Station accident. In this study, a seismic PRA under a rated power operation was performed for Japan Sodium cooled Fast Reactor (JSFR) developed by Japan Atomic Energy Agency. This PRA was intended to examine seismic impacts on the JSFR by calculating the Core Damage Frequency (CDF) with the identification of all the accident sequences induced by earthquake which may have potential possibility of direct core damage. Seismic hazard data was based on assessment results for existing nuclear site locations in Japan. Seismic fragility needed to quantify the accident sequences was set based on existing assessments for similar equipment. The base-case analysis showed that the total CDF would be approximately 10$$^{-6}$$ /reactor-year and JSFR is robust against the earthquake in the range of this assessment. The dominant contributor (about 80%) to the CDF is direct core damage by the sequence of simultaneous failures of reactor vessel and guard vessel. Sensitivity analysis was performed focusing on the simultaneous failures of reactor vessel and guard vessel. This result suggested that enhancement of failure probability assessment for guard vessels and/or provision of measures for maintaining coolant level following reactor vessel failure would be effective to reduce the CDF.


Three-dimensional and multienergy $$gamma$$-ray simultaneous imaging by using a Si/CdTe Compton camera

鈴木 義行*; 山口 充孝; 小高 裕和*; 島田 博文*; 吉田 由香里*; 鳥飼 幸太*; 佐藤 隆博; 荒川 和夫*; 河地 有木; 渡辺 茂樹; et al.

Radiology, 267(3), p.941 - 947, 2013/06

 被引用回数:10 パーセンタイル:42.69(Radiology, Nuclear Medicine & Medical Imaging)

Capabillity tests of 3D imaging for medical applications were performed by using a new Compton camera. $$^{18}$$F, $$^{131}$$I and $$^{67}$$Ga separately compacted into micro tubes were injected subcutaneously into a Wister rat and imaged after sacrifice of the rat (ex-vivo model). In a separate experiment $$^{111}$$In-chloride and $$^{131}$$I-Methylnorcholestenol were injected into a rat intravenously and $$^{64}$$Cu was injected into the stomach orally just before imaging (more physiological model). The Compton camera demonstrated its 3D multinuclear imaging capability by separating out the three nuclear distributions clearly in ex-vivo model. In the more physiological model, the distributions of $$^{131}$$I and $$^{64}$$Cu were clearly imaged although $$^{111}$$In was difficult to visualize due to blurring at low energy region of $$gamma$$-ray. In conclusion, our new Compton camera successfully demonstrated highly resolved multiplanar and multinuclear $$gamma$$-ray simultaneous imaging.


Decontamination of outdoor school swimming pools in Fukushima after the nuclear accident in March 2011

三枝 純; 操上 広志; 安田 良; 栗原 和男; 新井 栄揮; 黒木 良太; 松橋 信平; 小澤 隆志; 後藤 浩明; 高野 隆夫; et al.

Health Physics, 104(3), p.243 - 250, 2013/03

 被引用回数:3 パーセンタイル:29.69(Environmental Sciences)



Technical development for in-pile IASCC growth tests by using a 0.5T-CT specimen in JMTR

知見 康弘; 柴田 晃; 伊勢 英夫; 笠原 茂樹; 川口 佳彦*; 中野 純一; 近江 正男; 西山 裕孝

Proceedings of Enlarged Halden Programme Group Meeting 2011 (CD-ROM), 10 Pages, 2011/10



In-pile tests for IASCC growth behavior of irradiated 316L stainless steel under simulated BWR condition in JMTR

知見 康弘; 笠原 茂樹; 伊勢 英夫; 川口 佳彦*; 中野 純一; 西山 裕孝

Proceedings of 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors (CD-ROM), p.1219 - 1228, 2011/08




世取山 守*; 高野 純一*; 生井 潔*; 吉原 亮平; 野澤 樹; 長谷 純宏; 鳴海 一成

JAEA-Review 2010-065, JAEA Takasaki Annual Report 2009, P. 71, 2011/01



Extreme ultraviolet free electron laser seeded with high-order harmonic of Ti:sapphore laser

富樫 格*; 高橋 栄治*; 緑川 克美*; 青山 誠; 山川 考一; 佐藤 尭洋*; 岩崎 純史*; 大和田 成起*; 沖野 友哉*; 山内 薫*; et al.

Optics Express (Internet), 19(1), p.317 - 324, 2011/01

 被引用回数:88 パーセンタイル:96.89(Optics)



Mutation induction in ${it Asclepias}$ using ion beam irradiation

小林 伸雄*; 加納 さやか*; 佐々木 真一郎*; 田崎 啓介*; 中務 明*; 野澤 樹; 長谷 純宏; 鳴海 一成

JAEA-Review 2009-041, JAEA Takasaki Annual Report 2008, P. 77, 2009/12

${it Asclepias}$ is one of the perennial ornamentals native to central America, using for cutting, potting and bed flowers. For the purpose to obtain flower and/or plant form mutation, ${it Asclepias}$ seeds were irradiated with ion beams. Irradiated seeds were sowed in green house and germinated seedlings were transplanted into pots. After 10 months, these plants were planted in the field. Seed germination rate decreased from 200 Gy irradiation with increasing doses and any seeds could not germinate at 500 Gy. Survival rate of seedlings decreased below 50% at 150 Gy and 200 Gy, and all seedlings were molted at 250 Gy and more higher doses. In 50 Gy and higher doses irradiated seedlings, abnormal morphology of leaves (rounded apical leaf, branched leaf and narrow leaf) was observed and appearance of abnormal leaf was increased with dose up to 200 Gy.


Structure of HIV-1 protease in complex with potent inhibitor KNI-272 determined by high-resolution X-ray and neutron crystallography

安達 基泰; 大原 高志; 栗原 和男; 玉田 太郎; 本庄 栄二郎; 岡崎 伸生; 新井 栄揮; 正山 祥生; 木村 要*; 松村 浩由*; et al.

Proceedings of the National Academy of Sciences of the United States of America, 106(12), p.4641 - 4646, 2009/03

 被引用回数:100 パーセンタイル:91.04(Multidisciplinary Sciences)



Basic characteristics of a newly developed Si/CdTe Compton camera for medical imaging

河地 有木; 渡邉 茂樹; 佐藤 隆博; 荒川 和夫; 武田 伸一郎*; 石川 真之介*; 青野 博之*; 渡辺 伸*; 山口 充孝*; 高橋 忠幸*; et al.

2008 IEEE Nuclear Science Symposium Conference Record (CD-ROM), p.1540 - 1543, 2008/10

The Compton camera is a very promising medical imaging system when we consider multiple radionuclide imaging and its sensitivity, portability and compactness. We have developed a Compton camera by using Si and CdTe semiconductors for medical imaging. The prototype Compton camera head consists of a double-sided Si strip detector (DSSD) module as the scatter detector and four layered 16 CdTe pixel detector modules as the absorber detector. The DSSD has an area of 2.56$$times$$2.56 cm, a thickness of 500 $$mu$$m and a strip pitch of 400 $$mu$$m. The CdTe pixel detector has an area of 1.35$$times$$1.35 cm, a thickness of 500 $$mu$$m and a pixel size of 1.35 mm$$^{2}$$. The high-energy resolution detectors (DSSD: $$Delta$$E/E$$sim$$2.5%, CdTe: $$Delta$$E/E$$sim$$1%) enable detect the Compton scatter events of the incident $$gamma$$-rays, in consequence image radioactive multi-nuclide tracer. We evaluated distributions of sensitivity and spatial resolution, and rat study was performed with three tracers ($$^{111}$$In, $$^{131}$$I, $$^{64}$$Cu) concurrently-administered. As results, lines of point-source data indicated 4 mm spatial resolution in the center of field of view (FOV) in this experimental design, and a characteristic manner of the distributions in the Compton camera FOV was shown. The nuclides in the rat body were distinguished by the $$gamma$$-ray energies, each tracer imaged separately in vivo, and the difference in distribution among the nuclide was visualized successfully.


Plasma diagnostics in JFT-2M

河西 敏*; 神谷 健作; 篠原 孝司; 川島 寿人; 小川 宏明; 上原 和也; 三浦 幸俊; 岡野 文範; 鈴木 貞明; 星野 克道; et al.

Fusion Science and Technology, 49(2), p.225 - 240, 2006/02

 被引用回数:3 パーセンタイル:25.6(Nuclear Science & Technology)

約30台の計測装置から構成されているJFT-2Mの計測診断システムは、プラズマ生成,制御,平衡,安定性,閉込め,NBIやRF(LH, ICRF, ECH)による加熱,RFによる電流駆動の研究に使用されてきた。このうち、運動シュタルク効果を利用した偏光計,荷電交換反応分光器,重イオンビームプローブ,飛行時間測定法による中性粒子測定器等は、Hモード,高リサイクリング定常(HRS)Hモードの閉込め改善機構の解明や運転領域の探求に貢献した。赤外テレビカメラ,損失イオンプローブは、リップル損失粒子による壁への熱負荷,主プラズマからの損失するイオンに関する研究でそれぞれ重要な役割を果たした。この論文は、これらの計測機器についてレビューしたものである。



伊藤 集通; 木下 正高*; 斎藤 実篤*; 町山 栄章*; 島 茂樹*; 賀佐 信一*; 外川 織彦; 岡野 眞治*

JAERI-Research 2005-028, 121 Pages, 2005/09





浅田 隆; 加納 茂機; 舘 義昭; 河井 政隆*

JNC TN9410 2000-013, 89 Pages, 2000/09




Present status of Date-Free-Way(Distributed database systems for advanced nuclear materials)

舘 義昭; 加納 茂機; 藤田 充苗*; 栗原 豊*

Journal of Nuclear Materials, 271-272, p.486 - 490, 1999/05

 被引用回数:6 パーセンタイル:46.57(Materials Science, Multidisciplinary)




加治 芳行; 辻 宏和; 崎野 孝夫*; 藤田 充苗*; 衣川 純一*; 舘 義昭*; 斉藤 淳一*; 加納 茂機*; 志村 和樹*; 中島 律子*; et al.

JAERI-Tech 99-007, 32 Pages, 1999/02




Distributed database system for advanced nuclear materials (Data-Free-Way)

辻 宏和; 横山 憲夫; 藤田 充苗*; 加納 茂機*; 舘 義昭*; 志村 和樹*; 中島 律子*; 岩田 修一*

Advances in Science and Technology, 24, p.417 - 424, 1999/00



Present status of data-free-way (distributed database system for advanced nuclear materials)

辻 宏和; 横山 憲夫; 藤田 充苗*; 栗原 豊*; 加納 茂機*; 舘 義昭*; 志村 和樹*; 中島 律子*; 岩田 修一*

Journal of Nuclear Materials, 271-272, p.486 - 490, 1999/00



Alloying Effects on the Corrosion Behavior of Binary Nb-based and Mo-based Alloys in Liquid Li

斉藤 淳一; 加納 茂機; 古井 光明*; 森永 正彦*

Journal of Nuclear Materials, 264, p.216 - 227, 1999/00

 被引用回数:4 パーセンタイル:29.56(Materials Science, Multidisciplinary)



Surface Modification of Corrosion Resistance Materials By Ion Implantation

斉藤 淳一; 加納 茂機; 森田 洋右*; 工藤 久明*

JAERI-Review 98-016, p.164 - 166, 1998/10




斉藤 淳一; 舘 義昭; 林 和範; 加納 茂機

PNC TN9410 98-082, 60 Pages, 1998/08



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