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Neutron and photon dose rate distributions in linac rooms 直线加速器室中子和光子剂量率分布
Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.43
K. Kosako, K. Masumoto, K. Oishi, Hajime Nakamura, A. Toyoda, K. Iijima, Takashi Nakamura
{"title":"Neutron and photon dose rate distributions in linac rooms","authors":"K. Kosako, K. Masumoto, K. Oishi, Hajime Nakamura, A. Toyoda, K. Iijima, Takashi Nakamura","doi":"10.15669/PNST.6.43","DOIUrl":"https://doi.org/10.15669/PNST.6.43","url":null,"abstract":"In the X-ray irradiation of the 18 MeV electron linac, the spatial distributions of neutron and photon ambient dose equivalent rates were measured by ADC plastic dosimeter and Optical Stimulated Luminescence dosimeter in the linac room. The spatial distributions were measured on the surface of the linac device, the irradiation room and the maze pathway. The calculations were executed for three types of linac head models with the MCNP5 code. The calculated accuracy of the spatial distribution was evaluated by comparing the measured results. The calculation-to-experiment ratios (C/E) of dose rates by the detailed linac head models converged to the range from 0.8 to 5. The radioactivities of the concrete of linac room floor were measured and compared with the calculated result.","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84726023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on evaluation of applying flocculating agents for efficient decontamination of radioactively contaminated soil 絮凝剂对放射性污染土壤高效去污效果的评价研究
Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.68
J. Song, Sun-Il Kim
{"title":"Study on evaluation of applying flocculating agents for efficient decontamination of radioactively contaminated soil","authors":"J. Song, Sun-Il Kim","doi":"10.15669/PNST.6.68","DOIUrl":"https://doi.org/10.15669/PNST.6.68","url":null,"abstract":"The cases where the soil is widely contaminated by radioactive material include nuclear power plant accidents, such as Chernobyl and Fukushima, and repair of NPPs. The key nuclide involved in soil contamination is Cs, and Cs is emitted in gaseous form during an NPP accident and contaminates a wide area. The methods of recovering soil contaminated by radioactive materials include soil washing and electro-kinetic. In this paper, the authors selected the soil washing process, used flocculating agents, and measured the removal rate of the fine soil and Cs ions which are strongly combined with Cs. When the flocculating agent was put into the aqueous solution containing the fine soil and cesium, the maximum removal rate was 88%, and the minimum removal rate was about 67%.","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89705807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Applicability of a practical calibration for the small-type OSL dosimeter for measuring doses from direct X-rays and penetrating X-rays affected by scattered radiation 用于测量受散射辐射影响的直接x射线和穿透x射线剂量的小型OSL剂量计的实用校准的适用性
Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.22
T. Okazaki, H. Hayashi, Y. Mihara, T. Asahara, N. Kimoto, Y. Kanazawa, Kosaku Higashino, Kazuta Yamashita, S. Yokoyama, K. Takegami, T. Hashizume, V. Cruz, I. Kobayashi
{"title":"Applicability of a practical calibration for the small-type OSL dosimeter for measuring doses from direct X-rays and penetrating X-rays affected by scattered radiation","authors":"T. Okazaki, H. Hayashi, Y. Mihara, T. Asahara, N. Kimoto, Y. Kanazawa, Kosaku Higashino, Kazuta Yamashita, S. Yokoyama, K. Takegami, T. Hashizume, V. Cruz, I. Kobayashi","doi":"10.15669/PNST.6.22","DOIUrl":"https://doi.org/10.15669/PNST.6.22","url":null,"abstract":"aNagase Landauer, Ltd., Block C22-1, Suwa, Tsukuba, Ibaraki, 300-2686, Japan; bKanazawa University, 5-11-80 Kodatsuno, Kanazawa, Ishikawa, 920-0942, Japan; cGraduated School of Health Sciences, Tokushima University,3-18-15 Kuramoto, Tokushima, Tokushima, 770-8503, Japan; dFUJITA HEALTH UNIVERSITY,1-98 Dengakugakubo, Kutsukake-cho, Toyoake, Aichi, 470-1192, Japan; eYamaguchi University Hospital,1-1-1, MinamiKogushi, Ube, Yamaguchi, 755-8505, Japan; fSOKENDAI, Shonan Village, Hayama, Kanagawa, 240-0193, Japan; gUniversity of Fukui, 1-3-33 Kanawa-cho, Tsuruga, Fukui 914-0055, Japan","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79516235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Study on leakage test of iodine adsorber using cyclohexane 环己烷吸碘器泄漏试验研究
Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/pnst.6.13
Jie Yu, Jianxin Du, Longjiang Wang, Yongguo Li, T. Qiao, Y. Zhang
{"title":"Study on leakage test of iodine adsorber using cyclohexane","authors":"Jie Yu, Jianxin Du, Longjiang Wang, Yongguo Li, T. Qiao, Y. Zhang","doi":"10.15669/pnst.6.13","DOIUrl":"https://doi.org/10.15669/pnst.6.13","url":null,"abstract":"A new method for performance test of iodine adsorber, which is called cyclohexane method, is developed. Leakage simulation experiments and stability experiments using cyclohexane and freon respectively were conducted and compared to study the feasibility of using cyclohexane to replace Freon for in situ performance tests of iodine adsorber. In addition, the sorption and desorption behaviors of cyclohexane in impregnated activated carbon of iodine adsorber were investigated to study their effects on in situ mechanical leakage tests. For this reason, the effects of different carrier gas temperature, relative humidity, flow rate, and cyclohexane concentration in air were carefully investigated. Experimental results show that cyclohexane can be retained about 500 min in activated carbon bed therefore it can be used to replace freon to avoid its damage to atmosphere and temperature needs to pay attention in in situ performance tests because of its significant affection.","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79717188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimation of the characteristics of gamma-ray dose measurements with an experimental wireless dose monitoring system 用实验无线剂量监测系统估计伽马射线剂量测量的特性
Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.77
T. Fujibuchi, Yuta Nozaki, Y. Ishigaki, Y. Matsumoto
{"title":"Estimation of the characteristics of gamma-ray dose measurements with an experimental wireless dose monitoring system","authors":"T. Fujibuchi, Yuta Nozaki, Y. Ishigaki, Y. Matsumoto","doi":"10.15669/PNST.6.77","DOIUrl":"https://doi.org/10.15669/PNST.6.77","url":null,"abstract":"","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72942812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Basic evaluation of the Eu:BaFBr and Ce:CaF2 hybrid type optical fiber based dosimeter system for correction of quenching effect under carbon ion irradiation Eu:BaFBr和Ce:CaF2混合型光纤剂量计系统校正碳离子辐照猝灭效应的基本评价
Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.238
Yuho Hirata, Kenichi Watanabe, A. Yamazaki, S. Yoshihashi, A. Uritani, Y. Koba, N. Matsufuji, T. Yanagida, K. Fukuda
{"title":"Basic evaluation of the Eu:BaFBr and Ce:CaF2 hybrid type optical fiber based dosimeter system for correction of quenching effect under carbon ion irradiation","authors":"Yuho Hirata, Kenichi Watanabe, A. Yamazaki, S. Yoshihashi, A. Uritani, Y. Koba, N. Matsufuji, T. Yanagida, K. Fukuda","doi":"10.15669/PNST.6.238","DOIUrl":"https://doi.org/10.15669/PNST.6.238","url":null,"abstract":"We fabricated the hybrid type optical fiber based dosimeter system using Eu:BaFBr and Ce:CaF2 optically stimulated luminescence (OSL) materials in order to correct the quenching effect under high LET particle irradiation. The fabricated dosimeter probe can obtain signals from both OSL materials through one optical fiber. We investigated the probe response by irradiating it with mono-energetic carbon ions and broad-spectrum ones making the spread-out Bragg peak (SOBP). We demonstrated that the SOBP shape can be improved by correction of the quenching effect using the relationship between the luminescence efficiency and the signal intensity ratio of both OSL materials.","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75408387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The latest estimation for the parameter α value of radiation protection optimization in China 中国辐射防护优化参数α值的最新估计
Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.175
Jia Linsheng, Yang Yapeng, Feng Zongyang, X. Xiaoxiao, Zhang Jiangang
{"title":"The latest estimation for the parameter α value of radiation protection optimization in China","authors":"Jia Linsheng, Yang Yapeng, Feng Zongyang, X. Xiaoxiao, Zhang Jiangang","doi":"10.15669/PNST.6.175","DOIUrl":"https://doi.org/10.15669/PNST.6.175","url":null,"abstract":"","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74676308","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimation of photon yield in liquid scintillation counter by using Geant4 Monte Carlo simulation 利用Geant4蒙特卡罗模拟估算液体闪烁计数器的光子产率
Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.260
T. Aso, M. Hara, M. Shoji, T. Furusawa, T. Yoshimura, Y. Kato
{"title":"Estimation of photon yield in liquid scintillation counter by using Geant4 Monte Carlo simulation","authors":"T. Aso, M. Hara, M. Shoji, T. Furusawa, T. Yoshimura, Y. Kato","doi":"10.15669/PNST.6.260","DOIUrl":"https://doi.org/10.15669/PNST.6.260","url":null,"abstract":"Liquid scintillation counter (LSC) is an efficient technique for quantitative measurement of radioactivity in low energy beta decay nuclide. However, the detection efficiency varies with quench effect that caused by missing energy in the conversion from the energy of beta-ray to the intensity of scintillating photons. For the purpose of investigating the effect of photon yield on efficiency and quench level, the Geant4 simulation has been performed. The simulation modeled LSC-5100 manufactured by Hitachi Ltd. It consists of two photomultipliers (PMTs) placed around a sample vial in an optical chamber, and the activity is determined by using the count of double coincidence event in two PMTs. The simulation accounts for radioactive decay, electromagnetic interactions, scintillation and optical photon processes. The LSC spectrum was calculated from optical photons reached at the PMT windows. The photon yields in the simulation were estimated to reproduce the measured spectra in C-14 and H-3 standard quenched samples of Ultima Gold provided by PerkinElmer Co. Ltd. The calculated efficiencies in the photon yields well reproduced the measured efficiencies. In addition, the estimated photon yields were verified in the simulation of the external standard channel ratio (ESCR) with Cs-137 source. The ESCRs in the simulation reproduced the measured ESCRs as well.","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86809449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design and development of nuclear accident offsite consequence assessment system (NAOCAS_V3.0) 核事故场外后果评价系统(NAOCAS_V3.0)的设计与开发
Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.185
Lyu Minghua, Yao Rentai, Hao Hongwei, Zhao Duoxin, H. Sha, Zhang Junfang, Cheng Longquan, Zhang Fang
{"title":"Design and development of nuclear accident offsite consequence assessment system (NAOCAS_V3.0)","authors":"Lyu Minghua, Yao Rentai, Hao Hongwei, Zhao Duoxin, H. Sha, Zhang Junfang, Cheng Longquan, Zhang Fang","doi":"10.15669/PNST.6.185","DOIUrl":"https://doi.org/10.15669/PNST.6.185","url":null,"abstract":"","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87277766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of reactor-neutrino oscillation experiment based on consideration of internal constituent motion 考虑内组分运动的反应堆-中微子振荡实验分析
Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.251
K. Ishibashi, S. Suda, Eunji Lee, N. Shigyo
{"title":"Analysis of reactor-neutrino oscillation experiment based on consideration of internal constituent motion","authors":"K. Ishibashi, S. Suda, Eunji Lee, N. Shigyo","doi":"10.15669/PNST.6.251","DOIUrl":"https://doi.org/10.15669/PNST.6.251","url":null,"abstract":"Experimental data of neutrino oscillation have been obtained for electron antineutrinos from nuclear reactors in recent years. The experimental data have been successfully analyzed by assuming that the oscillation phenomenon is expressed by mixing angle θ and squared eigen neutrino mass difference Δm . It is of interest to explain the phenomena from another point of view. We attempted to find the neutrino internal motion that is consistent to the standard theory for weak interaction. As a test of internal constituent motion, the time evolution of internal particles was calculated. It was found that the oscillation length of 100 km level was explainable without use of Δm . A discussion was provided about possible existence of additional constituent in the neutrino system.","PeriodicalId":20706,"journal":{"name":"Progress in Nuclear Science and Technology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85818645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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