• Title, Summary, Keyword: 환경 방사선 지표

Search Result 48, Processing Time 0.029 seconds

Radio-sensitivity of Dark-striped Field Mice, Apodemus agrarius, as a Biological Dosimeter in Radio-ecological Monitoring System (환경 방사선 생물학적 감시 지표로서 야생 등줄쥐의 방사선 감수성)

  • Kim, Hee-Sun;Nishimura, Y.;Kim, Chong-Soon
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
    • /
    • v.4 no.1
    • /
    • pp.25-32
    • /
    • 2006
  • This study examined the possibility of using dark-striped field mice as a biological indicator for the environmental radio-surveillance. For this study, dark-striped field mice were caught from five areas of Kyonggi, Kyongsang, Chungchong and Cholla provinces. The external morphological characteristics and isoenzymic types of dark-striped field mice were studied after they were captured. Among the external morphological characteristics, the dark-brown coat, dark back stripe, head-to-tail length, tail length, and ear length matched the taxonomical characteristics of dark-striped field mice. The analyses on L-lactate dehydrogenase, aspartate aminotransferase, and malate dehydrogenese revealed that one species of dark-striped field mice, called Apodemus agrarius, was inhabitated throughout a wide range of Korea. On the other hand, the frequency of micronuclei in peripheral polychromatic erythrocytes to survived mice after irradiation also analyzed. The LD50/30 of A. cgrarius and ICR mice were approximately 5 Gy and 7.9Gy, respectively. The results of the study reveal that wild A. asrarius have a high potential as a biological monitoring system to determine the impact of radiation in areas such as those within the vicinity of nuclear power plants.

  • PDF

Measurement of Environmental Radiation according to Altitude above Sea Level in National Park (국립공원의 해발고도에 따른 환경방사선 측정)

  • Ji, Tae-Jeong;Lee, In-Sik
    • The Journal of the Korea Contents Association
    • /
    • v.12 no.12
    • /
    • pp.694-701
    • /
    • 2012
  • This study set put to measure the environmental radiation for mountainous regions of National Parks where Integrated Environmental Radiation Monitoring Network is not installed. For the measurement method, the space dose was classified at 1 meter high from the surface and the index dose at the surface. The measured radiation energy measured gamma, alpha and beta rays. For selection of national parks, we selected 10 national parks which are within the same distribution in the southern part and central part of the nation. For measurement equipment, INTERCEPTOR$^{TM}$(Thermo, USA, 2006) was used for gamma rays. As for the results of the measurements, for the space gamma dose, a high level was measured at a sea level of 500 meter in national parks with an altitude of less than 1,000 meter. It was found that the value was more than $0.23{\mu}Svh^{-1}$ especially in Bukhan Mountain, Gyeryong Mountain and Wolchul Mountain. In national parks with an altitude of more than 1,000 meter, $1.77{\mu}Svh^{-1}$ was measured at 1,500 meter at Seorak Mountain. Therefore, this is 10 times greater than the background standard dose. The national parks were there were no significant changes in dose were Naejang Mountain, Sobaek and Jiri Mountains. For the measurement of the index dose, a high dose level was measured at middle altitudes of 500 meter and 1,000 meter. For measurement according to the composition types of crust, high doses were recorded at national parks composed of rocks and a lower environmental radiation level was measured at Hanra Mountain where volcanic activities have occurred.

Construction of Aquatic Environmental Database Near Wolsong Nuclear Power Plant (월성 원전 주변 수생 환경 자료 구축)

  • Suh, Kyung-Suk;Min, Byung-Il;Yang, Byung-Mo;Kim, Jiyoon;Park, Kihyun;Kim, Sora
    • Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
    • /
    • v.17 no.2
    • /
    • pp.235-243
    • /
    • 2019
  • Radioactive materials are released into the air and deposited on the surface soil after a nuclear accident. Radionuclides deposited in soil are transported by precipitation to nearby environments and contaminate the surface water system. Basic data on surface watershed and soil erosion models have been collected and analyzed to evaluate the behavior of radionuclides deposited on surface soil after a nuclear accident. Data acquisition and analysis in aquatic environment were performed to investigate the physical characteristics and variation of biota in rivers and lakes of the Nakdong river area near the Wolsong nuclear power plant. For these purposes, a digital map, and hydrological, water quality and biota data were gathered and a systematic database (DB) was constructed in connection with them. Constructed aquatic DB will be supplied and used in surface watershed and soil erosion models for investigation of long-term movement of radionuclides in adsorptive form in surface soil. Finally, basic data and established models will be utilized for general radiological impact assessment in aquatic environment.

Organ Weights and Splenocytic Apoptosis in γ-irradiated Korean Dark-Striped Field Mice, Apodemus Agrarius Coreae (방사선 조사된 국내 야생 등줄쥐 (Apodemus agrarius coreae) 장기무게 및 비장세포 세포고사)

  • Joo, Hyunjin;Choi, Hoon;Yang, Kwang-hee;Keum, Dong-kwon;Kim, Hee sun
    • Journal of Radiation Protection and Research
    • /
    • v.40 no.3
    • /
    • pp.168-173
    • /
    • 2015
  • The present investigation was planned to estimate potential possibility of striped field mice, Apodemus agrarius coreae (A. a. coreae), as a biological dosimeter in radio-environmental ecology. We bred captured wild A. a. coreae at laboratory and classified taxonomically based on external, cranial and tooth characters. Organ weights and splenocytic apoptosis were observed in order to establish a basic data on radiation biology of A. a. coreae (male, 40 weeks old). The biological effects was observed at 24hrs following irradiation (doses : 0, 0.5, 1, 2 Gy, dose rate : $0.8Gymin^{-1}$, $^{137}Cs$). Only thymus weights was significantly decreased. Splenocytic apoptosis was increased after irradiation. But splenocytic apoptosis was decreased in 0.5 Gy ${\gamma}$-irradiated mice compared to those of 0, 1, 2 Gy (P < 0.05). These data suggested that events in thymus and spleen of Korean dark-striped field mice, A. a. coreae THOMAS, could be a potential radio-biological indicator in human environments.

"하나로"의 채널유동 차단사고시 방사선 환경 영향평가

  • Lee, Jong-Tae;Han, Mun-Hui;Hwang, Won-Tae;Lee, Byeong-Cheol;Park, Cheol
    • Proceedings of the Korean Nuclear Society Conference
    • /
    • /
    • pp.867-873
    • /
    • 1995
  • 개방수조형 연구로인 하나로에서 가상적인 채널유동 차단사고에 따른 방사능 방출시의 환경영향을 부지 기상자료 측정결과를 이용하여 고공방출과 지표 면방출의 두가지 경로에 대해 평가하였다. 계산 결과, 지표면방출이 고공방출보다 피폭선량이 크게 나타났으나, 두 경우 모두 제한구역(EAB) 및 저인구지역(LPZ) 경계에서의 피폭선량 허용기준치를 만족하였다. 그리고 비상계획구역은 800 m로 설정하면 적절함을 입증하였다.

  • PDF

Research on a Valuation Standard and the Actual Condition About Security Management in PACS (PACS에서 보안관리 평가기준 연구와 실태조사)

  • Jeong, Jae-Ho;Dong, Kyung-Rae;Kweon, Dae-Cheol;Son, Gi-Gyeong;Kim, Hyun-Soo;Kang, Hee-Doo
    • Journal of radiological science and technology
    • /
    • v.31 no.4
    • /
    • pp.347-353
    • /
    • 2008
  • This study is to prepare an evaluation standard about personal information protection and security management of a medical institution and to build up a grade standard of evaluation in PACS environment. We built up evaluation index based on 10 detailed items in four big categories (political security, technical security, data management security and physical security) by referring to ISO17799 (BS 7799), HIPPA (Health Insurance and Portability and Accountability Act of 1996) and domestic medical law. We have investigated at the thirty places where medical facility with the extracted security criteria and security evaluation index. Average score of physical security list, one of the big categories, was 18.5/20 (93%) at all medical institutions. Political security score was 18.5/30 (62%), data management security score was 12/20 (60%) and technical security score was 17.5/30 (58%). Therefore, security evaluation score was average 67 in 30 general hospitals, which was 4th level. The results showed that it is necessary to establish evaluation and management standard about personal information protection and security consciousness which are weak in PACS environment.

  • PDF

Analysis on the contaminant transport in subsurface soil at Daeduk site (대덕부지 토양내 오염물 이동 해석)

  • Suh, Kyung-Suk;Kim, Eun-Han;Hwang, Won-Tae;Jeong, Hyo-Joon;Han, Moon-Hee;Lee, Chang-Woo
    • Journal of Radiation Protection and Research
    • /
    • v.28 no.3
    • /
    • pp.155-163
    • /
    • 2003
  • The groundwater flow and contaminant transport numerical models have been established for analyzing the movements of pollutants in subsurface soil at Daeduk site. The groundwater flow and concentration of U-234 using the numerical models were simulated around Daeduk nuclear facilities. The computed groundwater flow was mainly advected toward the direction of east and southeast around HANARO in the site. The radioactive material entered into the subsurface soil was transported along the same direction with groundwater flow. The radioactive material deposited on the surface from the calculated concentration distributions was not affected by surrounding environment of the site.

Post-irradiation Changes in Antioxidant Activity of Spindle Tree Leaves from Different Areas (서식지에 따른 사철나무 잎의 이온화 방사선 조사 후 항산화 활성 변화 차이)

  • Kim, Jin-Kyu;Cha, Min-Kyoung;Wilhelmova, Nad'a;Mukherjee, Anita
    • Korean Journal of Environmental Biology
    • /
    • v.29 no.4
    • /
    • pp.280-285
    • /
    • 2011
  • As the plants grow in a fixed place, they can be a good indicator which reflects the level of environmental pollution. It is necessary for them to develop a strategy to cope with stress under unfavorable environmental conditions. In this study, spindle trees ($Euonymus$ $japonica$) were collected from a clean area (Kijang) as well as a heavily polluted area (Onsan) to check applicability of irradiation combined with plant bioassay to environmental monitoring. The leaves were irradiated with 0, 50 and 100 Gy of gamma rays, and then evaluated for antioxidative capacity with 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay and superoxide dismutase (SOD) analysis. The result shows that there was no significant changes in SOD and EDA (Electron Donationg Ability) in the samples collected from a polluted area. In the meanwhile, SOD increased in the samples from a clean area until 6 to 10 hours after irradiation, then it decreased gradually until 24 hours after irradiation. In conclusion, the plants in the polluted area have developed higher resistance to oxidative stress induced by ionizing radiation than those in the relatively clean area. Irradiation combined with plant bioassay on enzymatic activities and free radical scavenging capacity has proven to be a possible tool for biomonitoring the environmental pollution.

Distribution of Antibiotic Resistant Microbes in Aquaculture Effluent and Disinfection by Electron Beam Irradiation (양식장 배출수중의 항생제 내성균 분포 및 전자빔 살균처리)

  • Jang, Eun-Hee;Lim, Seung-Joo;Kim, Tak-Hyun
    • Journal of Korean Society of Environmental Engineers
    • /
    • v.33 no.7
    • /
    • pp.492-500
    • /
    • 2011
  • Antibiotic resistant microbes were isolated in catfish, trout, eel and loach aquaculture effluent. The distribution of antibiotic resistant microbes in aquaculture effluent and the disinfection efficiency of antibiotic resistant microbes by electron beam irradiation were investigated. It was shown that the multi-drug resistant bacteria were Aeromonas sp., Citrobacter sp., Bacillus sp., Marinobacter sp., Pantoea sp., Pseudomonas sp. and Enterobacter sp. in aquaculture effluent. 41.7% of total strains showed the resistance against one antibiotic agent, and 58.3% of total strains showed the resistance against more than two antibiotics. It was evidently shown that the toxicity and physicochemical properties of antibiotics can be estimated using Quantitative Structure Analysis Relationship (QSAR). Electron beam irradiation was very effective for the disinfection of antibiotic resistant bacteria from aquaculture effluent, in which the disinfection efficiency was approximately 99.9% with electron beam of 1 kGy.

Association of visceral fat obesity and other lifestyle factors with prostate cancer (비만으로 인한 전립선암 발생의 영향연구 : 복부비만도 측정과 그 외 생활 요인)

  • Kim, Myeong-Seong
    • Korean Journal of Digital Imaging in Medicine
    • /
    • v.17 no.1
    • /
    • pp.19-31
    • /
    • 2015
  • 최근 우리나라의 암 발생률은 꾸준히 증가추세에 있고 그 중에서도 전립선암은 갑상선암을 제외했을 때 남성에서 가장 높은 증가 추세를 보이고 있는 암이다. 전립선암은 그 동안 선진국에서 주로 발병하는 것으로 알려진 암 종이지만 서구화된 식습관과 생활 행태 변화로 인하여 국내에서도 발생률이 증가하는 것으로 추정하고 있다. 따라서 국내 환경에 맞는 내장 지방 분포와 같은 정확한 비만도 측정을 통해 우리나라에서 증가율 1위를 보이고 있는 전립선암 발생의 원인 관계를 찾고자 한다. 본 연구는 환자와 정상군 비교를 하는 환자-대조군 연구이고 본 연구를 위하여 임상시험 윤리위원회 (IRB) 승인을 받았다 (NCC2014-0124). 환자군은 2014년 8월 1일부터 2015년 1월 6일 까지 국립암센터를 방문하여 전립선암을 진단받고 수술과 항암치료 그리고 방사선 치료를 시작하지 않은 초진을 대상으로 하였고, 정상군은 2009년 11월부터 2014년 9월 30일까지 공단검진을 목적으로 국립암센터를 방문한 정상인을 대상으로 하였다. 전립선암 연구는 환자 총 52명에 평균 66세 (51 - 82세)이고 정상군은 총 50명에 평균 64세 (59 - 75세) 이다. 모든 연구 대상자들의 생활 요인 평가를 위하여 암 가족력, 흡연, 음주 상태, 운동, 등을 추가적으로 설문 조사하였다. MRI 영상의 배꼽 주위에서의 내장 지방과 피하지방을 전용 분석 컴퓨터를 활용하여 측정 하였다. 복부비만율은 환자군과 정상군에서뿐만 아니라 (p = 0.03), 전립선암 악성도와 (Gleasonscore; p = 0.001)도 통계적 차이를 나타냈다. 하지만 BMI 결과와는 전립선암 발생과 악성도에서 무관함을 보인 것에 반해 허리둘레는 전립선암의 발생에 영향을 미치는 결과를 나타났다. 한편 전립선암의 또 다른 악성도 지표인 PSA는 비만 측정치와의 상관성이 Gleason score와 보다 대체적으로 낮게 나타났다. 학력, 운동량, 흡연, 음주 상태와 같은 생활 특성에 따른 전립선암 발생의 영향 관계는 뚜렷하지 않았다. 결론적으로 본 연구를 통해서 전립선암의 발생 위험도와 악성도 지표로 복부 비만도가 유용함을 나타냈고 간단한 신체 계측 지표 활용으로는 BMI보다 허리둘레 측정치가 더 암 발생의 연관성이 높음을 보였다.

  • PDF