Search Results 1-14 of 14

  • Chatercteristics of microstrip antenna under low-level gamma-rays irradiation  [in Japanese]

    KINOSHITA Kazuya , WATANABE Ryohei , SATO Masaharu , ICHIKI Hirofumi , MATSUOKA Tsuyoshi , OGATA Masato

    宇宙空間のような高放射線線量の下では機器が誤動作を起こし、最悪の場合故障にいたる。誤動作の原因として粒子線の場合はシングルイベント効果が、ガンマ線の場合は電子材料の電気特性変動が挙げられる。放射線の中でもガンマ線は透過率が高く、電子機器に与える影響も大きい。電子機器への影響の要因として、抵抗やコンデンサ、トランジスタなどの回路素子だけでなく、回路基板自体への影響も考えられている。本論文では、ガンマ …

    ITE Technical Report 38.5(0), 89-92, 2014

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  • Review of the Measurement of Trane Amounts Charge Using the Magnetically Levitated Electrode Ionization Chamber  [in Japanese]

    KAWAGUCHI Toshiro , FUTAGAMI Koji , ICHIKI Hirofumi

    … Using this device, we have measured space charge around an insulation board made of Bakelite during low level gamma ray irradiation, and the electric charge originating from several kinds of photocatalyst paint lighted up by ultraviolet rays and a visible ray. …

    IEEJ Transactions on Sensors and Micromachines 133(10), 286-291, 2013-10-01

    J-STAGE  References (16)

  • Quantitative Test for Radioactivity of Uranium Filled in Waste Drums Using Q<sup>2</sup> Low Level Waste Assay Systems  [in Japanese]

    YOKOYAMA Kaoru , HATA Haruhi , OHARA Yoshiyuki , SUGITSUE Noritake

    … 本手法の実用性検証として市販のγ線分析システムであるCANBERRA製Qualitative and Quantitative(Q<sup>2</sup>) Low Level Waste Assay Systemsへの適用性について評価した。 …

    RADIOISOTOPES 62(11), 833-840, 2013

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  • ICONE19-43639 A CHERENKOV THRESHOLD COUNTER USING LIQUID CORE FIBER FOR ESTIMATION OF RADIOACTIVE WASTE INVENTORY

    Kawarabayashi Jun , Sato Yosuke , Hayakawa Hikaru , Tomita Hideki , Iguchi Tetsuo

    … Decommissioning of nuclear power plant will increase a number of radioactive wastes near future. … In Japan, some of the radioactive wastes will show high intensity of radiation and must be disposed in underground that deep enough from human activities. … Therefore, it is important to estimate the inventory of such intense radioactive wastes. …

    The Proceedings of the International Conference on Nuclear Engineering (ICONE) 2011.19(0), _ICONE1943-_ICONE1943, 2011

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  • Evaluation of the Surface Contamination Density with <SUP>51</SUP>Cr by Direct Measurement Method using a GM Survey-meter  [in Japanese]

    ABE Toshiaki , KAWADU Ikuho , UMATA Toshiyuki , NORIMURA Toshiyuki

    … It is difficult to detect a low level contamination with <SUP>51</SUP>Cr using a scintillation survey-meter because background counting rate of the survey-meter is high and emitted rate of λ-rays (0.320 MeV) from <SUP>51</SUP>Cr is less than 10%. …

    Japanese Journal of Radiation Safety Management 7(1), 67-71, 2008

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  • New Phenomena - Control of radiation level by temperature setting  [in Japanese]

    KOMURA Kazuhisa , MURATA Yoshimasa , TANAKA Kiwamu , NAKANO Yusuke

    放射平衡にあるウランとリンモリブデン酸アンモニウム(AMP)を混合するとラドンの娘核種であるPb-21およびBi-214からのγ線のカウントが異常に低下する奇妙な現象を発見した。低下は、室温で1/2、60℃で1/4にも達する。この効果は液体窒素温度で消失し室温に戻すと回復するという可逆現象であり、温度によるラドンの物理化学的性質の変化がこの現象発現の鍵を握っていることを示唆している。ナトリウム塩で …

    The Japan Radiation Research Society Annual Meeting Abstracts 2006(0), 344-344, 2006

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  • Magnetically levitating equipment used for an automatically measuring system of low level radioactive rays(DEPARTMENT OF ELECTRICAL ENGINEERING)  [in Japanese]

    Ichiki Hirofumi , Futagami Koji , Kawaguchi Toshiro , Matoba Masaru , Fukuda Ryu , Utsunomiya Yoshitomo

    … One of them can be detected γ-rays in spite of a simple equipment. … However, measurement of γ-rays in the atmosphere by using the ionization chamber is difficult because of its low sensitivity. … We have developed the high sensitive ionization chamber for γ-rays constructed a magnetically levitating electrode without any insulating support. … The developed equipment was applied the measurement of γ-rays in atmosphere. …

    九州産業大学工学部研究報告 (42), 43-48, 2005

    IR 

  • Development of Automated Measurement Device for Low-level Radioactive Contamination on Building Surfaces  [in Japanese]

    TACHIBANA Mitsuo , ITOH Hirokuni , HATAKEYAMA Mutsuo , YANAGIHARA Satoshi

    Transactions of the Atomic Energy Society of Japan 3(1), 120-127, 2004-03-25

    References (10)

  • Development of Automated Measurement Device for Low-level Radioactive Contamination on Building Surfaces

    TACHIBANA Mitsuo , ITOH Hirokuni , HATAKEYAMA Mutsuo , YANAGIHARA Satoshi

    原子力施設の廃止措置において解体撤去を選択した場合,その最終段階で建屋・構造物の撤去が必要となるが,原子力施設の建屋・構造物は頑丈な鉄筋コンクリートからなり,解体から発生するすべてのコンクリートを放射性廃棄物として取り扱うことは合理的ではない。そこで,建屋・構造物から放射性の部分のみを分離し,発生するコンクリートを非放射性廃棄物として取り扱う必要がある。これには,建屋表面の放射能汚染を除去し,建屋 …

    Transactions of the Atomic Energy Society of Japan 3(1), 120-127, 2004

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  • Low-Lying Levels in <SUP>147</SUP>Nd in the Decay of <SUP>147</SUP>Pr

    Shibata Michihiro , Taniguchi Akihiro , Yamamoto Hiroshi , Kawade Kiyoshi , Ruan Jian-Zhi , Tamai Tadaharu , Kawase Yoichi , Okano Kotoyuki

    … The level structure of <SUP>147</SUP>Nd has been studied from the decay of <SUP>147</SUP>Pr. … The radioactive sources of <SUP>147</SUP>Pr were separated from the fission products of <SUP>235</SUP>U using the on-line isotope-separator KUR-ISOL and chemical separation techniques. … A decay scheme has been constructed involving 93 γ-rays and a newly observed 1261.1 keV level. …

    Journal of the Physical Society of Japan 62(1), 87-96, 1993

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  • Technique for radioactivity measurement in drum package waste by using scattered gamma-rays.

    KAWASAKI Satoru , KONDO Masahiro , IZUMI Shigeru , KIKUCHI Makoto

    … An evaluation method for the radionuclide content in low level drum package waste by using scattered γ-rays has been investigated. … Gamma-rays are counted by a detector after passing through a collimator having appropriate vertical and horizontal openings both for the segmented scan and for the average geometrical efficiency being almost independent of the source position. …

    Journal of Nuclear Science and Technology 27(9), 783-789, 1990

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  • A Study on Radiation-Resistance of PIC (Polymer-Impregnated Concrete) for Container of Conditioning and Disposal of Low and Intermediate Level Radioactive Wastes  [in Japanese]

    ISHIZAKI Kanjiro , ARAKI Kunio , KASAHARA Yuko , SUDOH Giichi

    … The application of PIC (Polymer-Impregnated Concrete) to the container for conditioning and disposal of low and intermediate level radioactive wastes have been investigated, because the PIC has excellent characteristics such as high mechanical strength, high water impermeability, good corrosion resistance, good durability and so on. …

    Journal of the Society of Materials Science, Japan 32(354), 327-333, 1983

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  • Non-destructive 226Ra/238U dating of quaternary corals by gamma-spectrometry.

    KOMURA Kazuhisa , SAKANOUE Masanobu , KONISHI Kenji

    金沢大学理学部付属低レベル放射能実験施設

    Proceedings of the Japan Academy, Series B 54(9), 505-509, 1978

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  • Chemical Dosimetry of Low Level γ-Rays Using Radioactive Iron

    HASEGAWA Kunihiko

    0.1<I>N</I>硫酸溶液に硫酸第一鉄とトレーサーとして2価の放射性鉄 (<SUP>59</SUP>Fe (II) ) をいれ, 低線量のガンマ線線量の測定法を検討した。<BR>2価および3価の放射性鉄 (<SUP>59</SUP>Fe (II) , <SUP>59</SUP>Fe (I …

    RADIOISOTOPES 15(2), 69-72, 1966

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