詳細

杉山　亘 （スギヤマ　ワタル）

  • 原子力研究所　准教授
Last Updated :2024/04/25

コミュニケーション情報 byコメンテータガイド

  • コメント

    電力会社の原子力部門並びに原子力発電所で勤務していました。福島第一原子力発電所の事故原因が停電であることを世界で最も早く伝えました。難燃物の減容処理に関する研究を実施しています。

  • 報道関連出演・掲載一覧

    ＜報道関連出演・掲載一覧＞ ●2014/09/17 　毎日放送「ちちんぷいぷい」 　瞬間停電について。

研究者情報

学位

  • 博士（工学）（2005年03月 信州大学）
  • 修士（工学）（1995年03月 東京工業大学）

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J-Global ID

現在の研究分野（キーワード）

    電力会社の原子力部門並びに原子力発電所で勤務していました。福島第一原子力発電所の事故原因が停電であることを世界で最も早く伝えました。難燃物の減容処理に関する研究を実施しています。

研究分野

  • エネルギー / 原子力工学

経歴

  • 2015年04月 - 現在  近畿大学原子力研究所准教授
  • 2011年 - 現在  近畿大学原子力研究所原子炉主任技術者
  • 2008年04月 - 2015年03月  近畿大学講師
  • 1995年04月 - 2008年03月  中部電力株式会社

学歴

  • 2002年04月 - 2005年03月   信州大学大学院   工学系研究科   材料工学専攻（社会人博士課程）

所属学協会

  • 日本イオン交換学会   日本原子力学会   

研究活動情報

論文

  • Ryohei Okuda; Atsushi Sakon; Sin-ya Hohara; Wataru Sugiyama; Hiroshi Taninaka; Kengo Hashimoto
    JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 53 10 1647 - 1652 2016年 [査読有り]
     
    The bunching technique has been widely utilized in Feynman- neutron correlation analysis to synthesize neutron counts within longer gate widths by bunching time-sequence neutron counts stored in multichannel scaler channels. An alternative technique referred to as moving-bunching technique was proposed to reduce a statistical scatter of variance-to-mean ratio of neutron counts. The conventional bunching technique has no overlap of adjacent bunches, while the present technique makes adjacent bunches overlap as long as possible similarly to the moving average technique. A Feynman- experiment was performed in the UTR-KINKI, to confirm the advantage of the proposed bunching technique. When a neutron detector was placed far from the core, a Feynman- analysis with the conventional bunching technique led to a scattered variance-to-mean ratio from which the prompt-neutron decay constant was never determinable. However, another analysis with the proposed technique remarkably reduced the above scatter and enabled the determination of the decay constant. For a neutron detector close to the core, the proposed technique also reduced statistical error of the decay constant.
  • Atsushi Sakon; Kengo Hashimoto; Wataru Sugiyama; Sin Ya Hohara; Cheol Ho Pyeon; Tadafumi Sano; Takahiro Yagi; Takaaki Ohsawa
    Journal of Nuclear Science and Technology 52 2 204 - 213 2015年02月 
    © 2014 Atomic Energy Society of Japan. All rights reserved. A unique power spectral analysis for a subcritical reactor system driven by a pulsed 14 MeV neutron source was carried out at the Kyoto University Critical Assembly (KUCA). In this analysis, a complex cross-power spectral density between time-sequence signal data from an accelerator beam ammeter and a neutron detector was measured to determine the prompt-neutron decay constant of an accelerator-driven system (ADS) from the phase data of the spectral density. Assuming the one-point kinetics model, in theory, the decay constant can be arithmetically derived from the phase at the integral multiples of the pulse repetition frequency. However, the actual derivation from the phase at a pulse repetition frequency of 20 Hz considerably underestimated the prompt-neutron decay constant, compared with that obtained by a previous pulsed neutron experiment, and the derived decay constant apparently decreased with an increase in the multiple of the pulsed repetition frequency. Considering a lag time in detector response, the above underestimation and the above apparent decrease were solved to obtain the consistent decay constant. While both previous power spectral analysis and Feynman-α analysis for pulsed neutron source require non-linear least-squares fits of the respective complicated formulae, the present analysis makes the fitting unnecessary except at regular calibration of the lag time. This feature is advantageous for a robust online monitoring of subcritical reactivity of an actual ADS.
  • Sin-ya Hohara; Masayo Inagaki; Hirokuni Yamanishi; Genichiro Wakabayashi; Wataru Sugiyama; Tetsuo Itoh
    The 12th International Conference on Radiation Shielding (ICRS-12) and the 17th Topical Meeting of the Radiation Protection and Shielding Division of ANS (RPSD-2012), Progress in Nuclear Science and Technology 4 39 - 42 2014年04月 [査読有り]
  • Atsushi Sakon; Kengo Hashimoto; Muhamad Aiman Bin Maarof; Masahiro Kawasaki; Wataru Sugiyama; Cheol Ho Pyeon; Tadafumi Sano; Takahiro Yagi; Takaaki Ohsawa
    Journal of Nuclear Science and Technology 51 1 116 - 126 2014年01月 
    Large negative reactivity of a subcritical system driven by a pulsed 14 MeV neutron source has been measured in the Kyoto University Critical Assembly. The subcriticality of the accelerator-driven system (ADS) ranged in effective multiplication factor roughly from 0.98 to 0.92, which corresponded to an operational range of an actual ADS proposed by Japan Atomic Energy Agency. As the measurement technique, pulsed neutron method, power spectral analysis for pulsed neutron source, accelerator-beam trip method were employed. From neutron count decay data obtained by the pulsed neutron experiment, not only the prompt-neutron decay constant of fundamental mode but also a higher spatial mode could be derived. The subcriticality was also determined from the fundamental decay constant. The measured cross-power spectral density consisted of a familiar correlated reactor-noise component and many uncorrelated delta-function-like peaks at the integral multiple of pulse repetition frequency. The fundamental prompt-neutron decay constant, i.e., the subcriticality determined from the latter uncorrelated peaks was consistent with that obtained by the above pulsed neutron experiment. However, the magnitude of the former correlated component was reduced with an increase in the subcriticality and eventually this component became almost white at deeply subcritical state ranging in the multiplication factor under 0.95. Consequently, the determination of the decay constant from the correlated component was impossible under such a subcritical state. As data analysis method for the beam trip experiment, both the conventional integral count method and the least-squares inverse kinetics method (LSIKM) were employed. The LSIKM analysis led to the consistent subcriticality with that obtained by the pulsed neutron experiment, while the integral count method significantly underestimated the subcriticality. This underestimation originated from a residual background count, which was maintained after the beam trip. The LSIKM was mostly not influenced by such a slight count rate. © 2013 Atomic Energy Society of Japan.
  • Sin-Ya Hohara; Masayo Inagaki; Hirokuni Yamanishi; Genichiro Wakabayashi; Wataru Sugiyama; Tetsuo Itoh
    Radiation Monitoring and Dose Estimation of the Fukushima Nuclear Accident 103 - 113 2014年01月 [査読有り]
     
    The Kinki University Atomic Energy Research Institute investigated radioactive contamination resulting from the Fukushima Daiichi Nuclear Power Plant accident in urban areas of Fukushima City, Fukushima Prefecture, Japan. Activity measurement of the surface soil and a survey of the dose rate distribution in urban areas were performed. From the results of this research, dose rate changes in paved areas became clear, and gradients of the dose rate decrease for different paving materials were measured and analyzed.
  • Atsushi Sakon; Kengo Hashimoto; Wataru Sugiyama; Hiroshi Taninaka; Cheol Ho Pyeon; Tadafumi Sano; Tsuyoshi Misawa; Hironobu Unesaki; Takaaki Ohsawa
    Journal of Nuclear Science and Technology 50 5 481 - 492 2013年05月 
    A series of power spectral analyses for a thermal subcritical reactor system driven by a pulsed 14 MeV neutron source was carried out at Kyoto University Critical Assembly (KUCA), to determine the prompt-neutron decay constant of the accelerator-driven system (ADS). The cross-power spectral density between time-sequence signal data of two neutron detectors was composed of a familiar continuous reactor noise component and many delta-function-like peaks at the integral multiple of pulse repetition frequency. The prompt-neutron decay constant inferred from the reactor noise component of the cross-power spectral density was consistent with that obtained by a pulsed neutron experiment. However, the reactor noise component of the auto-power spectral density of each detector was hidden by a white chamber noise in the higher-frequency range and this feature resulted in a considerable underestimation of the decay constant. For several runs with a low pulse-repetition frequency, furthermore, we attempted to infer the decay constant from point data of the delta-function-like peaks. The analysis for a run under a slightly subcritical state resulted in the consistent decay constant; however, those for other runs under significantly subcritical states underestimated the decay constant. Considering the contribution of a spatially higher mode to the point data, the above underestimation was solved to obtain the consistent decay constant. While the Feynman-α formula for a pulsed neutron source is too complicated to be fitted directly to variance-to-mean ratio data, the present analysis on frequency domain is much simpler and the conventional formula based on the first-order reactor transfer function is available for fitting to power spectral density data. © 2013 Taylor and Francis Group, LLC.
  • 左近 敦士; ムハマド アイマン ビン マーロフ; 橋本 憲吾; 杉山 亘; 卞 哲浩; 佐野 忠史
    日本原子力学会 年会・大会予稿集 2013 0 131 - 131 一般社団法人 日本原子力学会 2013年 
    14MeVパルス中性子源により駆動された京都大学臨界集合体の未臨界炉体系において、未臨界度を2％から8％の間で設定し、2系統の中性子検出器信号間および、加速器ビーム電流系と中性子検出器信号間のクロスパワースペクトル密度を測定した。このクロスパワースペクトル密度のゲインと位相差から算出した即発減衰定数は、パルス中性子源による結果を再現した。
  • 芳原新也; 稲垣昌代; 山西弘城; 若林源一郎; 杉山亘; 伊藤哲夫
    近畿大学原子力研究所年報 48 11 - 21 近畿大学原子力研究所 2012年03月 
    type:Departmental Bulletin Paper [Abstract] Residual heat removal system of Fukushima Daiichi Nuclear Plant was down at 11th March 2011, because of the Tohoku Region Pacific Coast Earthquake and the Tsunami come after the earthquake. The system down causes the meltdowns in Reactor 1, Reactor2 and Reactor3. As a result, a large amount of radioactive materials were released to general environment, and dose rates of Tohoku & Kanto area increased with the fallout of the radioactive materials. Kinki University Atomic Energy Research Institute has researched time series variations of dose rate distribution and contamination level in urban distracts of Tohoku Naka-Dori Area from the middle of April 2011. Results of the researches and the analyses are described in this paper. Hohara, Sin-ya
  • Hiroshi TANINAKA; Atsuko MIYOSHI; Kengo HASHIMOTO; Cheol Ho PYEON; Tadafumi SANO; Tsuyoshi MISAWA; Wataru SUGIYAMA; Takaaki OHSAWA
    Journal of Nuclear Science and Technology 48 9 1272 - 1280 2011年09月
  • Hiroshi TANINAKA; Kengo HASHIMOTO; Cheol Ho PYEON; Tadafumi SANO; Tsuyoshi MISAWA; Hironobu UNESAKI; Wataru SUGIYAMA; Takaaki OHSAWA
    Journal of Nuclear Science and Technology 48 6 873 - 879 2011年06月
  • 左近 敦士; 冨塚 慎吾; 橋本 憲吾; 卞 哲浩; 佐野 忠史; 三澤 毅; 杉山 亘
    日本原子力学会 年会・大会予稿集 2011 0 164 - 164 一般社団法人 日本原子力学会 2011年 
    パルスモード運転下の加速器により駆動された京都大学臨界集合体の未臨界炉体系において、検出器出力のパワースペクトル密度を測定した。このパワースペクトル密度から算出した即発減衰定数は、固定中性子源下での結果と一致した。
  • 冨塚 慎吾; 左近 敦士; 橋本 憲吾; 杉山 亘
    日本原子力学会 年会・大会予稿集 2011 0 152 - 152 一般社団法人 日本原子力学会 2011年 
    高次モード計算の源反復に対してWielandtの加速法を適用した。高速原型炉クラスの体系の空間高次モード計算に適用した結果、基本モードのみならず高次モードの源反復の収束の著しい加速が確認された。
  • Reductive atmosphere of supercritical water with RuO2 resulting in TcO2 colloid: Spectroscopic, morphological and crystallographic study on solutions and precipitates in Hasteroy C-22
    T. Yamamura; K. Yubuta; I. Satoh; Y. Yoshida; Y. Shiokawa; T. Sekine; W. Sugiyama; K.-C. Park; H. Tomiyasu
    The Journal of Supercritical Fluids 43 317  2007年 [査読有り]
  • 山村 朝雄; 佐藤 伊佐務; 杉山 亘; 高橋 三幸; 塩川 佳伸; 冨安 博; 大槻 勤; Tomoo Yamamura; Isamu Satoh; Wataru Sugiyama; Mitsuyuki Takahashi; Yoshinobu Shiokawa; Hiroshi Tomiyasu; Tsutomu Ohtsuki; Institute for Materials Research Tohoku University; Institute for Materials Research Tohoku University; Electric Power Research and Development Center Chubu Electric Power Co. Inc.; Institute for Materials Research Tohoku University; Institute for Materials Research Tohoku University; Department of Chemistry and Material Engineering Faculty of Engineering Shinshu University; Laboratory for Nuclear Science Tohoku University
    核理研研究報告 = Research report of Laboratory of Nuclear Science 38 48 - 53 東北大学大学院理学研究科附属原子核理学研究施設 2005年 [査読有り]
     
    The present investigation indicates that during the decomposition of laminate sheeting, the produced gas contains no radioactivity in any run. The distribution of Fe, Co, and Sr was determined by radiometric analysis after laminate sheeting was decomposed using supercritical water mixed with RuO_2. Iron, cobalt and strontium were recovered as solids after the present supercritical-water reaction by the addition of an excessive quantity of iron hydroxide before the reaction. In the case of strontium, almost all radioactivities were found in the liquid phase. However, by adding precipitate reagents to the liquid phase obtained in the reaction, strontium can be recovered in the solid phase. This method should be a very effective way to decompose the nonflammable organic materials of LLW generated by nuclear power plants.
  • Behavior of Technetium in Supercritical Water. Distribution to liquid, solid phases and onto metal surfaces
    T. Yamamura; I. Satoh; N. Okuyama; Y. Shiokawa; T. Sekine; W. Sugiyama; K.-C. Park; H. Tomiyasu
    Journal of Nucear and Radiochemical Sciences 6 233  2005年 [査読有り]
  • Chemical states in oxides films on stainless steel treated in supercritical water: Study by factor analysis of X-ray photoelectron spectra
    T. Yamamura; N. Okumura; Y. Shiokawa; M. Oku; H. Tomiyasu; W. Sugiyama
    Journal of The Electrochamical Society 152 B540  2005年 [査読有り]
  • 酸化ルテニウム触媒超臨界水による放射性廃棄物処理
    杉山亘; 岡田英嗣; 杉田雄二; 朴基哲; 冨安博; 山村朝雄
    火力原子力発電 57 29  2005年 [査読有り]
  • An extreme disposition method for low-level radioactive using supercritical water (3)
    W. Sugiyama; T. Yamamura; K.-C. Park; H. Tomiyasu; Y. Shiokawa; H. Okada; Y. Sugita
    Progress in Nuclear Energy 47 29  2005年 [査読有り]
  • Recovery of radioactivity as solids from nonflammable organic low-level radioactive wastes using supercritical water mixed with RuO2
    W. Sugiyama; T. Yamamura; K.-C. Park; H. Tomiyasu; I. Satoh; Y. Shiokawa; H. Okada; Y. Sugita
    The Journal of Supercritical Fluids 25 240  2005年 [査読有り]
  • Decomposition of Radioactive Organic Wastes with Supercritical Water Medium Containing RuO2
    W. Sugiyama; K.-C. Park; T. Yamamura; H. Okada; Y. Sugita; H. Tomiyasu
    Journal of NUCLEAR SCIENCE and TECHNOLOGY 2 42  2005年 [査読有り]
  • Satoh I.; Yamamura T.; Okuyama N.; Shiokawa Y.; Takahashi M.; Sekine T.; Sugiyama W.; Park K. -C.; Tomiyasu H.
    CYRIC annual report 2004 95 - 99 Cyclotron and Radioisotope Center, Tohoku University 2004年 [査読有り]
  • Excitation and deexcitation processes of Eu(Ⅲ) benzo-crown-5 complex studied on comparing with its coordination sphere
    T. Yamamura; W. Sugiyama; H. Hotokezaka; M. Harada; H. Tomiyasu; Y. Nakamura
    Inorganica Chimica Acta 320 75  2001年 [査読有り]
  • Study on a nuclear fuel reprocessing system based on the precipitation method in mild aqueous solutions
    Y. Asano; N. Asanuma; T. Ito; M. Kataoka; S. Fujino; T. Yamamura; W. Sugiyama; H. Tomiyasu
    American Nuclear Society, Nuclear Technology 120 198  1997年 [査読有り]

MISC

共同研究・競争的資金等の研究課題

  • 日本学術振興会：科学研究費助成事業 挑戦的萌芽研究
    研究期間 : 2012年04月 -2015年03月 
    代表者 : 杉山 亘
     
    原子力発電所などを運用することにより難燃性廃棄物が発生する。この廃棄物を超臨界水あるいは亜臨界水により分解し減容処理するとともに廃棄物由来の液体燃料を生成する研究を実施した。研究の結果、現在、日本原燃株式会社低レベル放射性廃棄物埋設処理センターでも受け入れられないゴム手袋は、ほぼ完全に減容できた。得られた油分の品質は原油相当であった。グリーンケミストリーの観点から、水を再利用する研究も実施した結果、水を再利用しても、難燃物由来の油分の品質は原油相当であった。

委員歴

  • 2023年09月 - 現在   日本原子力学会   2024年春の年会 現地委員
  • 2023年09月 - 現在   日本原子力学会 標準委員会 基盤応用・廃炉技術専門部会   委員
  • 2023年06月 - 現在   日本原子力学会 標準委員会 基盤応用・廃炉技術専門部会 廃止措置分科会   幹事
  • 2010年07月 - 現在   日本原子力学会 標準委員会 基盤応用・廃炉技術専門部会 廃止措置分科会   委員
  • 2010年 - 2019年   日本原子力学会 関西支部   幹事
  • 2012年09月 - 2013年03月   日本原子力学会   2013年春の年会 現地委員
  • 2010年06月 - 2011年06月   日本原子力学会   代議員

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