Progress in Nuclear Science and Technology最新文献

Comparison of the Fukushima radioactive mapping by two different aerial radiation monitoring systems 两种不同的航空辐射监测系统绘制的福岛放射性地图的比较

Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.130

Byoung-Jik Kim, M. Sasaki, Y. Sanada

{"title":"Comparison of the Fukushima radioactive mapping by two different aerial radiation monitoring systems","authors":"Byoung-Jik Kim, M. Sasaki, Y. Sanada","doi":"10.15669/PNST.6.130","DOIUrl":"https://doi.org/10.15669/PNST.6.130","url":null,"abstract":"A radiation monitoring system using unmanned aerial vehicles (UAVs) was developed for post-nuclear accidents by the Korea Institute of Nuclear Safety (KINS). The Japan Atomic Energy Agency (JAEA) has been conducted radiation monitoring in the Fukushima area and undertaking research and development of related technology. Considering future large-scale disasters, it is important that measurement methods using UAVs are unified between the neighbor countries. Two organizations in neighbor countries attempted technical collaborations to compare results obtained from different methods. In 2015, measurements were carried out in an area within 10 km from the Fukushima Dai-ichi Nuclear Power Station (FDNPS), where an accident occurred due to the Great East Japan Earthquake and where contamination remains and access is controlled. Corrections to convert the coefficients from detectors in air to the radiation dose or radioactivity concentration on the surface were carried out in areas previously surveyed as flat and relatively evenly contaminated. Explorations of contamination mapping were conducted in river basins, with contaminants appearing in different water and soil contours, which were expected to make intuitive comparisons easier for multiple mappings. We used a Japanese unmanned helicopter, which is used for agricultural applications such as the spraying of pesticides. The measurement system of JAEA and KINS was installed and the same route was flown once in each case.","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":"75820641","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

Simulation research on safety verification of 60Co transportation package 60Co运输包装安全性验证仿真研究

Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.162

Dong Meng, Guoqiang Li, Jiangang Zhang, Dajie Zhuang, Renze Wang, Hongchao Sun, Shutang Sun, Xuexin Wang, Zheng-Jie Hong

引用次数: 0

The migration experiment of Sr-90 in variable saturated soils and numerical simulation used Hydrus-3d 利用Hydrus-3d进行Sr-90在变饱和土中的迁移试验和数值模拟

Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/pnst.6.156

Anchang Deng, Jun Zhu, Yunfeng Shi, Chao Chen, Tian Xie, Ting Li, A. Zhang

{"title":"The migration experiment of Sr-90 in variable saturated soils and numerical simulation used Hydrus-3d","authors":"Anchang Deng, Jun Zhu, Yunfeng Shi, Chao Chen, Tian Xie, Ting Li, A. Zhang","doi":"10.15669/pnst.6.156","DOIUrl":"https://doi.org/10.15669/pnst.6.156","url":null,"abstract":"There is a scientific support that migration data of Sr-90 in the nuclear waste landfill soil will provide for safety estimation and accident response measures in landfill.In order to make a more accurate prediction of the migration of Sr-90, it is critical to get the migration parameters such as longitudinal (or transverse) dispersivity and partition coefficient. This article try to use a method for estimating the migration parameters of Sr-90 in variable saturated soils combining experiment and numerical simulation, then explores the method with the migration of Sr-90 in silty loam in Shanxi province as an example. The migration experiment of Sr-90 was carried by column method , the water flow in is 375 mL/d, the pH value was about 7 at room temperature. The results show that the migration distance of central flow direction for Sr-90 is 3.9 cm and the peak concentration is 1.04×104 Bq/cm3. According to the concentration distribution of Sr-90 in the soil column combined with three-dimensional numerical model of nuclide migration (Hydrus-3d), the partition coefficient in the silty loam is 79 ml/g while the longitudinal dispersivity is 0.7 cm and the transverse dispersivity is 0.8 cm by fitting. This method takes the porosity and water velocity of solid into consideration that static experiments fail to cover and obtains the longitudinal and transverse dispersivity at the same time, which making the results more tally with the actual situation.","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":"86508376","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

Development of novel rectum dosimeter using OSL sheet with the aim of direct dose measurement of organ dose during brachytherapy 基于OSL片的新型直肠剂量计的研制，目的是在近距离治疗中直接测量器官剂量

Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.30

T. Asahara, H. Hayashi, E. Tomita, K. Sakuragawa, H. Saegusa, Yasufumi Shitakubo, H. Ikushima, Y. Kanazawa, Y. Mihara, Y. Miyahara, T. Okazaki, T. Hashizume, V. Cruz

引用次数: 1

Spectroscopic measurements of L X rays using a transition-edge sensor microcalorimeter for nondestructive analysis of transuranium elements 利用过渡边缘传感器微热量计对超铀元素进行无损分析的L X射线光谱测量

Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.8

K. Nakamura, K. Maehata, T. Sugimoto, Y. Kiguchi, N. Iyomoto, Y. Morishita, K. Takasaki, K. Mitsuda

引用次数: 0

Development of wide one-dimensional X-ray line sensor in backscatter X-ray imaging system for infrastructure inspection 基础设施检测后向散射x射线成像系统中宽一维x射线线传感器的研制

Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.208

Kazuya Ohashi, Kenichi Watanabe, A. Yamazaki, A. Uritani, H. Toyokawa, T. Fujiwara, S. Mandai, Hidenori Isa

引用次数: 3

Technical review of thyroid cancer effects by radiation of NPPs in Korea 韩国核电站辐射对甲状腺癌影响的技术综述

Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.193

Kyo-Youn Kim, K. Kang, D. Keum, Bong-Hwan Kim, K. P. Kim, Byung Il Kim, S. Seo, Y. Jin, Soo-Geun Kim, H. Kim, H. Ahn, K. Cho, K. Jeong, W. Park

引用次数: 0

Dose assessment analysis on neutron source terms of 70 MeV proton and UC2 target reaction for RAON ISOL target system RAON ISOL靶体系70 MeV质子与UC2靶反应中子源项剂量评估分析

Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.247

Chewook Yim, Do-Hyun Kim, Jae Hyun Kim, Jae Yong Lee, Quang Huy Khuat, M. Woo, C. Shin, Jong Kyung Kim, Sangjin Lee, S. Nam, Jongwoo Kim, Bo Kyun Seo

{"title":"Dose assessment analysis on neutron source terms of 70 MeV proton and UC2 target reaction for RAON ISOL target system","authors":"Chewook Yim, Do-Hyun Kim, Jae Hyun Kim, Jae Yong Lee, Quang Huy Khuat, M. Woo, C. Shin, Jong Kyung Kim, Sangjin Lee, S. Nam, Jongwoo Kim, Bo Kyun Seo","doi":"10.15669/PNST.6.247","DOIUrl":"https://doi.org/10.15669/PNST.6.247","url":null,"abstract":"Isotope Separator Online (ISOL) facility at the Institute for Basic Science (IBS) in South Korea has been designed for producing rare isotopes. The purpose of this work was to analyze the effect of the strategy on neutron source term to evaluate effective dose for ISOL target room. Several neutron source terms were generated by varying the dimensional distribution, the number of angular divisions, and the number of energy divisions. For the dimensional distribution of neutron source, a cylindrical distribution with same shape as the target was recommended in front wall and a cylinder and a point distribution were recommended in side wall. Also, more than 32 angle divisions which had within 1.5 % discrepancy both in the front and side wall was recommended for dividing angles. In a case of dividing energies, a discrepancy within 2 % was shown in the source terms divided into more than 100 divisions. However, in case that discrete energy distribution is used, the dose was highly overestimated as the number of energy divisions decreases.","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":"90612343","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

Comparison of airborne and ground-based tools used for radiation measurement in the environment 用于环境辐射测量的机载和地面工具的比较

Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.103

Kotaro Ochi, M. Sasaki, Mutsushi Ishida, Y. Sanada

引用次数: 4

Measurement of radiation dose distribution in minipig physical phantom using RPLGD 用RPLGD法测量小型猪体模辐射剂量分布

Progress in Nuclear Science and Technology Pub Date : 2019-01-31 DOI: 10.15669/PNST.6.113

Jae Seok Kim, P. Lee, Byeong Ryong Park, Han Sung Kim, Kum-Bae Kim, Gyu-Seok Cho, Sehwan Shim, Wi-Ho Ha, Sunhoo Park, Y. Jin

{"title":"Measurement of radiation dose distribution in minipig physical phantom using RPLGD","authors":"Jae Seok Kim, P. Lee, Byeong Ryong Park, Han Sung Kim, Kum-Bae Kim, Gyu-Seok Cho, Sehwan Shim, Wi-Ho Ha, Sunhoo Park, Y. Jin","doi":"10.15669/PNST.6.113","DOIUrl":"https://doi.org/10.15669/PNST.6.113","url":null,"abstract":"Radio-photoluminescence glass dosimeter (RPLGD) has many advantages such as small size, high sensitivity, low fading effect, excellent dose linearity and repeatability. Because of these advantages, RPLGDs were used to measure the absorbed dose as in-vivo dosimeter. In Korea Institute of Radiological and Medical Sciences (KIRAMS), a minipig physical phantom was applied to evaluate the dose distribution for animal irradiation study. In this study, RPLGDs were used as a dosimeter to evaluate the dose distribution in the 5th and 25th slices. For the reliable result, RPLGDs were irradiated to evaluate the expanded measurement uncertainty. The expanded measurement uncertainty of RPLGD was determined as 6.08% with a coverage factor of k=2. Additionally, the framework of the Geant4 toolkit was used to verify the dose distribution by using RPLGD measurement under the same experiment condition. To analyze the linearity between the RPLGD measurements and Geant4 simulation, each of absorbed doses was compared according to the measurement points in the minipig physical phantom. As a result, the coefficients of determination (R2) were evaluated as 0.9767 and 0.9852 at each slice of the 5th and 25th.","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":"88348248","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