Updated on 2022/12/04

写真a

 
SHIRAKAWA, Yoshiyuki
 
Scopus Paper Info  
Paper Count: 0  Citation Count: 0  h-index: 11

Citation count denotes the number of citations in papers published for a particular year.

Affiliation
Affiliated organization, Research Innovation Center
Job title
Professor(without tenure)

Education

  •  
    -
    1980

    Tokyo Institute of Technology   Science of Engineering   Electrical and Electronic Engineering  

  •  
    -
    1980

    Tokyo Institute of Technology  

Degree

  • Doctor of Engineering

Research Experience

  • 2010
    -
     

    同上 研究基盤技術部長

  • 2008
    -
     

    同上 企画課長、人材育成・交流課長

  • 2008
    -
     

    Head of Planning Section

  • 2006
    -
     

    同上 人材育成課長

  • 2001
    -
     

    National Institutes for Quantum and Radiological Science and Technology

  • 1998
    -
     

    科学技術庁放射線医学総合研究所 主任研究官

  • 1998
    -
     

    Senior researcher at National Institute of Radiological

  • 1996
    -
     

    University of Fukui   Faculty of Engineering

  • 1996
    -
     

    Lecturer at Fukui University

  • 1987
    -
     

    新日本製鉄(株)掛長、室長、部長代理歴任

  • 1987
    -
     

    worked as a group manager at Nippon Steel Corporation

  • 1985
    -
     

    英国 Harwell 原子力研究所留学

  • 1985
    -
     

    studied at Harwell Laboratory in England

  • 1980
    -
     

    新日本製鉄(株)入社

  • 1980
    -
     

    joined Nippon Steel Corporation

  •  
     
     

    この間、IAEA-RCA プロジェクトに参加

  •  
     
     

    Sciences Participated in IAEA-RCA projects

  •  
     
     

    National Institute of Radiological Sciences Training School   Planning Section, Training Scholl

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Professional Memberships

  •  
     
     

    日本原子力学会

  •  
     
     

    日本放射線安全管理学会

  •  
     
     

    日本アイソトープ協会

  •  
     
     

    応用物理学会

  •  
     
     

    The Society of Instrument and Control Engineers

  •  
     
     

    The Japan Society of Applied Physics

  •  
     
     

    Japan Radioisotope Association

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Research Areas

  • Nuclear engineering

  • Measurement engineering

Research Interests

  • 放射線応用計測機器

  • 放射線応用計測

  • ガンマ線

  • 中性子

  • 放射線

  • 制御

  • 計測

  • Nucleonic ControlSystems

  • Applied Radiation Measurements

  • Gamma-ray

  • Neutron

  • Ionizing Radiation

  • Control

  • Instrumentation

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Papers

  • Using a fast response radiation detector based on a response prediction method for decontamination related to the Fukushima Daiichi Nuclear Power Plant Accident

    SHIRAKAWA Yoshiyuki

    Radiation Measurements   ( 49 ) 115 - 119  2013  [Refereed]

  • Radiation counting characteristics on surface-modified polyethylene naphthalate scintillators

    SHIRAKAWA Yoshiyuki

    Radioisotopes   62 ( 62 ) 879 - 884  2013  [Refereed]

    DOI CiNii

  • Development of a direction finding gamma-ray detector

    Y. Shirakawa

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS   263 ( 1 ) 58 - 62  2007.10  [Refereed]

     View Summary

    This paper describes a direction finding gamma-ray detector, which consists of three different scintillators; NaI (Tl), CsI (Tl) and BGO. The detector positively increases directional sensitivity to incident gamma-rays, and can measure direction, energy and number of gamma-rays. This detector will be useful to carry out monitoring of nuclear power plants or radiation facilities in emergencies. It will be also effective in searching for radiation sources such as radioisotopes and radioactive contaminations. Experimental results have shown the proposed directional detector has a potential for practical use in real fields and will contribute to radiation emergency preparedness. (C) 2007 Elsevier B.V. All rights reserved.

    DOI

    Scopus

    36
    Citation
    (Scopus)
  • Developments of directional detectors with NaI(Tl)/BGO scintillators

    Y Shirakawa

    NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS   213 ( 213 ) 255 - 259  2004.01  [Refereed]

     View Summary

    This paper describes directional gamma ray detectors with different types of scintillators. The detectors, which positively increase directional sensitivity to incident gamma rays, have been developed to measure directions, energies and counts of gamma rays, and to search for radioactive materials such as orphan radioisotopes or contaminations. Experimental results have shown that proposed directional detectors have a potential for practical use in real fields and will contribute to radiation protection and safety. (C) 2003 Elsevier B.V. All rights reserved.

    DOI

    Scopus

    13
    Citation
    (Scopus)
  • A build-up treatment for thickness gauging of steel plates based on gamma-ray transmission

    Y Shirakawa

    APPLIED RADIATION AND ISOTOPES   53 ( 4-5 ) 581 - 586  2000.10  [Refereed]

     View Summary

    A thickness gauging model of steel plates with build-up treatment, which is based on a gamma-ray transmission technique, has been proposed. Its performance has been evaluated by experiments using the real Cs-137 thickness gauge equipped at the heavy plate mill in the steel industry. It is shown that the calculated values with the new model are in good agreement with experimental data obtained by the gamma-ray thickness gauge in the thickness range from 0 to 10 cm. (C) 2000 Elsevier Science Ltd. All rights reserved.

    DOI

    Scopus

    19
    Citation
    (Scopus)
  • A Feasibility Study to Determine the Carbon and Oxygen Contents of Steel Using Fast Neutron Technique,

    SHIRAKAWA Yoshiyuki

    Int.J.Radiat.Appl.Instrum.   ( 5 ) 519 - 528  1991  [Refereed]

  • An In-stream Gamma-ray Scatter Gauge for Sintering Plant Control in the Steel Industry

    SHIRAKAWA Yoshiyuki

    Int.J.Radiat.Appl.Instrum.   ( 3 ) 147 - 156  1989  [Refereed]

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Misc

  • 動的予測サーベイメータの60Co汚染検査への応用

    飯田治三, 鎌田貴志, 渡井勝範, 天野 豁, 白川芳幸

    RADIOISOTOPES   57 ( 11 ) 669 - 677  2008

    DOI CiNii

  • Development of a direction finding gamma-ray detector

    Y. Shirakawa

    Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms   263 ( 1 ) 58 - 62  2007.10

     View Summary

    This paper describes a direction finding gamma-ray detector, which consists of three different scintillators
    NaI (Tl), CsI (Tl) and BGO. The detector positively increases directional sensitivity to incident gamma-rays, and can measure direction, energy and number of gamma-rays. This detector will be useful to carry out monitoring of nuclear power plants or radiation facilities in emergencies. It will be also effective in searching for radiation sources such as radioisotopes and radioactive contaminations. Experimental results have shown the proposed directional detector has a potential for practical use in real fields and will contribute to radiation emergency preparedness. © 2007 Elsevier B.V. All rights reserved.

    DOI

  • Directional Characteristics of a Monitoring Post with Triple Scintillators

    YAMANO Toshiya, KOBAYASHI Yusuke, HARA Masaki, SHIRAKAWA Yoshiyuki

    RADIOISOTOPES   55 ( 11 ) 671 - 678  2006

     View Summary

    A conventional monitoring post is the equipment useful for check of leakage of radiation or radioactive substance from a nuclear facility. This device regularly offers the data of radiation dose rate (μSv/h, nGy/h) and counting rate (cpm, cps) . We have developed a new one which can also measure an incoming direction of gamma ray flux for early discovery of a nuclear accident or adequate interpretation of abnormal data caused from other reasons. This detector is composed of three kinds of scintillators, NaI (Tl), CsI (Tl), and BGO with a photomultiplier tube. The measurement principle is based on the relative change of photoelectric peak counts made by each scintillator depending on the incident direction. This principle in the middle energy range has already been proven by the experiment using 137Cs (662 keV) . Then, here the characteristics of the directional sensitivity for low energy (241Am, 60 keV), middle energy (133Ba, 356 keV) and high energy gamma rays (60Co, 1250 keV) have been simulated by using Electron Gamma Shower Program (EGS4), and evaluated by experiments. As a result, this detector has been confirmed to measure the incident direction in a wide energy range.

    DOI CiNii

  • モニタリング型全方向性γ線検出器のエネルギー応答特性

    白川芳幸

    RADIOISOTOPES   55 ( 1 ) 15 - 20  2006

    DOI

  • Quick Response of a Survey Meter in Static Condition

    SHIRAKAWA Yoshiyuki

    RADIOISOTOPES   54 ( 7 ) 199 - 204  2005

     View Summary

    The radiation survey meter is an indispensable radiation detector in case of the radiation accident or the nuclear accident, and it is used as a typical equipment in the daily radiation control of radiation facilities. The survey meter measures dose rate (μSv/h, mSv/h) or count rate (min-1, sec-1) . In general, about 30 sec per each place is necessary for the measurement, and the time of about 60 sec per each place is necessary for a more accurate measurement. In the management in case of the emergency, it is a problem to consume a lot of time and the labor to measure dose rate or count rate at a lot of places. At the daily control, the same problem occurs. Especially, a quick response is important for the emergency case. In order to solve this problem, the method, which predicts the final value at the initial stage without waiting for the final response has been proposed. The method includes two different models of the survey meter. One model treats the condition that the time constant of the survey meter is given, and the other model covers the condition that the time constant is unknown. Experimental results show that both models can predict the final response within 10 sec with reasonable accuracy.

    DOI CiNii

  • Whole-Directional Gamma Ray Detector Using a Hybrid Scintillator

    SHIRAKAWA Yoshiyuki

    RADIOISOTOPES   53 ( 8 ) 445 - 450  2004

     View Summary

    It is necessary to know the incident direction of gamma rays to search for the position of radioactive materials or contamination remotely. In order to meet this demand, a new gamma ray detector, which positively raises directional sensitivity against incoming gamma rays, has been developed. This detector is composed of three kinds of different scintillators and a photomultiplier tube. The types of scintillators are NaI (Tl), CsI (Tl), and BGO. The section shape of each scintillator is sectorial of 120 degrees. The one cylindrical scintillator is made by optically connecting three sectorial scintillators. Gamma rays penetrate along a straight path through each scintillator of the detector, and the length of each path is dependent on the incident direction. Therefore the probability of photoelectric effect in each scintillator is changed, according to an incident direction of gamma rays. As a result, the gamma ray counts of three peaks observed in a spectrum obtained by a multi-channel analyzer have dependency with the direction. The response curve of each scintillator with respect to a peak count and an incident direction was made by experiments using a gamma ray source of 137Cs. It has been recognized that these response curves have sensitivity in the total range from 0 to 360 degrees. Therefore the proposed detector has the possibility that the direction can be identified.

    DOI CiNii

  • Development of directional detectors with NaI(Tl)/BGO scintillators

    Nuclear Instruments and Method in Physics Research B   213, 255-259  2004

    DOI

  • Development of directional detectors with NaI(Tl)/BGO scintillators

    Nuclear Instruments and Method in Physics Research B   213, 255-259  2004

    DOI

  • Development of Gamma Ray Directional Detectors Based on the Optical Connection with Different Types of Scintillators

    Radiation Detectors and Their Users   157-163  2002

  • Development of Gamma Ray Directional Detectors Based on the Optical Connection with Different Types of Scintillators

    Radiation Detectors and Their Users   157-163  2002

  • A Thickness Measurement Model for Steel Slabs Based on a Gamma-Ray Transmission Technique

    SHIRAKAWA Yoshiyuki, HORIKOSHI Kiyomi, AMANO Hiro

    Transactions of the Society of Instrument and Control Engineers   35 ( 5 ) 693 - 695  1999

     View Summary

    A non-linear thickness measurement model, which is based on a gamma-ray transmission technique and applied for a gamma-ray thickness gauge, has been proposed. Its performance has been evaluated by experiments using a real 137Cs thickness gauge installed at heavy plate mills in the steel industry and the calculated results with the proposed model have agreed well with the experimental values.

    DOI CiNii

  • An X-ray Radioscopy System for Pipe Weld Inspection Using a Real-time Image Integration Method

    HORIKOSHI Kiyomi, SHIRAKAWA Yoshiyuki

    Transactions of the Society of Instrument and Control Engineers   32 ( 6 ) 811 - 819  1996

     View Summary

    This paper describes an X-ray radioscopy system which has been developed for on-line welding inspection of large diameter steel tubes incorporating X-ray image integration technique as well as simultaneous control method for X-ray tube voltage and current. The simultaneous control of X-ray voltage and current features regulation of X-ray intensity which has permeated through steel tubes of varying wall thickness. This system censures stable statistical error range which leads to clear image. Also an X-ray image integrating technique which places emphasis on the contrast of defects against background has been developed. These technologies feature stable integration process under tubes' fluctuating traveling speed in a mill. By utilizing the proposed methods, those images involving defects are integrated 20 to 30 times to reduce statistical errors and processed into clear and high contrast images. Our on-line and off-line tests show penetrameter sensitivity within 1.0 to 1.4% at the welding thickness ranging from 10 to 40mm. This X-ray radioscopy has been in operation at a large diameter steel tube mill and has contributed to improved quality control of the tube products.

    DOI CiNii

  • Distance Measurement Based on Compton Scattering.

    SHIRAKAWA Yoshiyuki, HORIKOSHI Kiyomi, AMANO Hiro

    RADIOISOTOPES   45 ( 10 ) 605 - 612  1996

     View Summary

    A distance measurement method to make use of Compton scattering of gamma-ray was proposed. This method treated two cases. Concretely, the case that density of a measured object was constant and the case that the density was changed were examined.<BR>A source and a detector are set up at the same side of the object. When density is not varied, the amount of scattered gamma-ray is not depending on a distance. However, the number of gamma-rays detected becomes a function of distance. The function is in proportion to the solid angle to the detector from the efficient center of a scattering region. On the other hand, in the case that density is changed, the number of scattered gamma-rays is altered by density. Hence the number becomes a function of distance and density. Dual detectors are located at different positions and we make two equations on relation of detected gamma-rays, distance and density. Here if the count of gamma-rays detected is given, both distance and density can be calculated.<BR>By using computer simulations and experiments, a performance of the method was evaluated. As a result, the precision of the distance measurement was ±3% within a range of 10-100 cm in constant density. In the case that the density is changed with a range 1.707-1.885 g/cm3, the accuracy of this method was ±1 mm within a range of 8-10 cm.

    DOI CiNii

  • タンデム検出器によるガンマ線の飛来方向とエネルギーの同時計測に関する基礎的検討

    Radioisotopes, 50, 4, 117-122 (2001)  

    DOI

  • ガンマ線の飛来方向とエネルギーの同時測定用タンデム検出器の開発

    応用物理学会、放射線, 26, 4, 67-73 (2000)  

  • 中性子とガンマ線を利用した高炉の多変数計測

    計測自動制御学会論文集, 34, 4, 311-317 (1998)  

    DOI

  • ベータ線透過を利用した小型塗料厚さ計の開発

    Radioisotopes, 48, 3, 163-171 (1999)  

    DOI

  • The Present Status of Nucleonic Control Systems in Japan

    IRRMA, 98, 245-260 (1998)  

  • Present Status of Non-Destructive Test in Japanese Steel Industry and its Future Prospects

    Proc. of 14th World Conference on Non-Destructive Testing, 292-302 (1996)  

  • A Non-linear Model for Thickness Measurement Based on a Gamma-Ray Transmission Technique

    IMEKO, Vol.9, TC-14, 165-170 (1999)  

  • A Build-Up Treatment for Thickness Gauging of Steel Plates Based On Gamma-Ray Transmission

    Applied Radiation and Isotopes, 53, 581-586 (2000)  

    DOI

  • 252Cf中性子・ガンマ線同時利用による高炉内部の状態計測法

    Radioisotopes, 46, 11, 793-803 (1997)  

    DOI

  • The Present Status of Nucleonic Control Systems in Japan

    IRRMA, 98, 245-260 (1998)  

  • Present Status of Non-Destructive Test in Japanese Steel Industry and its Future Prospects

    Proc. of 14th World Conference on Non-Destructive Testing, 292-302 (1996)  

  • A Non-linear Model for Thickness Measurement Based on a Gamma-Ray Transmission Technique

    IMEKO, Vol.9, TC-14, 165-170 (1999)  

  • A Build-Up Treatment for Thickness Gauging of Steel Plates Based On Gamma-Ray Transmission

    Applied Radiation and Isotopes, 53, 581-586 (2000)  

    DOI

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Industrial Property Rights

  • Direction Finding Radiation Detector, and Radiation Monitoring Method and Apparatus

    Patent

     View Summary

    US7655912B2

  • 放射線検出値の予測方法及び予測応答方検出器及び放射線モニタリング方法

    Patent

     View Summary

    特許第4265813号

  • 放射線方向性検出器及び放射線モニタリング方法、装置

    Patent

     View Summary

    特許第4159052号

  • 表面汚染検査装置及び検査方法

    Patent

     View Summary

    特許第4469962号

  • 放射線測定装置及びデータ処理方法

    Patent

     View Summary

    特許第4127840号

Works

  • 全方向性γ線検出器

    2005
    -
    2007

Awards

  • 第7回日刊工業新聞モノづくり連携大賞(特別賞)

    2011   日刊工業新聞社  

    Winner: 白川 芳幸, 共同受賞

  • Bestof 2011

    2011   Euro Physics Letters  

    Winner: SHIRAKAWA Yoshiyuki

  • 第24回 独創性を拓く先端技術大賞(フジサンケイビジネスアイ賞)

    2010   フジサンケイグループ  

    Winner: 白川 芳幸, 共同受賞

  • 放射線安全管理功労者賞(団体)

    1988   科学技術庁  

    Winner: 白川 芳幸, 共同受賞

Research Projects

  • Applied Radiation Measurement

    Public/Private Cooperative Joint Researches

    Project Year :

    2005
    -
    2008
     

  • 全方向性γ線検出器の開発

    研究開発事業委託費

    Project Year :

    2005
    -
    2007
     

  • 予測応答型サーベイメータの開発

    原子力関係研究

    Project Year :

    2006
    -
     
     

  • 新型モニタリングポストの開発

    原子力関係研究

    Project Year :

    2005
    -
     
     

  • ペットボトルプラスチックの検出器への応用展開

  • 放射線応用計測の研究 1.中性子即発ガンマ線分析の応用 2.デュアルエネルギーガンマ線透過法の応用 3.散乱ガンマ線による幾何学的量の計測 4.放射性物質の位置と核種の遠隔同定法の研究(方向性検出器の開発)

    原子力関係研究

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Committee Memberships

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    日本アイソトープ協会理工学部会常任委員ほか