• Title/Summary/Keyword: 보너구

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Evaluation of Response Functions for Activation Foil-based Bonner Spheres (중성자 방사화 포일 기반 보너구 반응함수 계산 방법)

  • Kim, Jung-Ho;Park, Hyeon-Seo
    • Journal of Radiation Protection and Research
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    • v.36 no.1
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    • pp.44-51
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    • 2011

  • Activation foil-based Bonner sphere spheres are used to obtain neutron energy spectra of nuclear power plants or accelerator-produced neutrons. The position and the foil mass dependence of response functions should be studied carefully before measurement of Bonner spheres. This study showed that the normal incidence to the foil surface made a large shift of responses while parallel and isotropic incidence made no position dependence. The correlation between foil mass and response was not linear. Therefore, the response functions of activation-foil based Bonner spheres should be calculated for every different foil mass and the direction of Bonner spheres for parallel incidence will be preferred for radioactive neutron source or accelerator target produced neutrons.

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Measurement of neutron spectra in MC50 cyclotron using Bonner sphere spectrometer with LiI scintillation detector (LiI 섬광검출기 기반의 보너구 스펙트로메터를 이용한 MC50 사이클로트론의 중성자스펙트럼 측정)

  • Ha, Wi-Ho;Park, Seyoung;Yoo, Jaeryong;Yoon, Seokwon;Lee, Seung-Sook;Kim, Jungho;Kim, Jong Kyoung
    • Journal of Radiation Protection and Research
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    • v.38 no.3
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    • pp.143-148
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    • 2013

  • Operational nuclear facilities such as nuclear power plants and particle accelerators show various neutron spectra according to the type of facilities and specific position. Necessities of neutron dose management and neutron monitoring for radiation protection of radiation workers in such a kind of facilities have continuously increased in recent years. Bonner sphere spectrometers are widely used for measurement of neutron spectra. Data on response function of neutron detector, default neutron spectra and count rates of Bonner sphere spectrometer are required to obtain unfolded neutron spectra in specific workplaces. In this study, we carried out measurement of neutron spectra produced in MC50 cyclotron using Bonner sphere spectrometer with LiI scintillation detector. Additionally, we estimated quantitative data on neutron flux, mean neutron energy and ambient dose equivalent rate according to the incident proton energies and positions in MC50 cyclotron.

  • https://doi.org/10.14407/jrp.2013.38.3.143 인용 PDF KSCI