• Journal of Radiation Protection and Research
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• v.41 no.1
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• pp.7-14
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• 2016

Background: The objective of this study was to investigate Korean people's awareness about impact of the Fukushima nuclear power plant accident in Japan and radioactive contamination caused by it. Materials and Methods: The respondents of the survey were 600 adults who resided in the Seoul metropolitan area. Results and discussion: The survey results show that the majority of respondents were concerned about impact of radiation leakage that might have an effect on our environment. They were worried about radioactive contamination of foodstuffs, particularly fishery products and preferred to acquire information through TV(49.8%) or the Internet(31.3%). Meanwhile, respondents mentioned that the information on the Fukushima nuclear accident and radioactive contamination had not been sufficient and they didn't know well about the follow-up measures of the government on the accident. Most respondents answered that information on radioactive contamination levels and safety of foods and environment was most needed. Conclusion: The results of this study could be useful to enhance awareness on radioactivity and improve risk communication on nuclear power plant accidents.

• Journal of Radiation Protection and Research
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• v.28 no.1
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• pp.1-8
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• 2003

The periodic safety review of operational nuclear power plants requires that the plants should keep a well organized environmental monitoring program. The past records of environment monitoring data were analyzed. and the tritium concentrations of the samples in the surface and ground water around Kori site were measured. It was shown that the tritium concentrations around the Kori site were slightly higher than that of natural background. The change of background tritium concentration was estimated through a numerical modeling. Two different versions of 7 compartments model - the world and the northern hemisphere - defined in NCRP-62 were modeled for the global tritium cycling. The numerical solution of the model was obtained using a computer program, AMBER. The four cases of tritium source-terms into the atmosphere were considered. The results showed that the tritium concentration in the surface soil water was higher than that in sea water or surface stream water. Also, it was shown that the tritium produced by the interaction between cosmic rays and the gases were the major source of tritium, and the tritium produced by nuclear weapon test decreased considerably.

• Journal of Food Hygiene and Safety
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• v.33 no.6
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• pp.488-494
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• 2018

To ensure food-safety of mushrooms from radioactive contamination, edible mushroom samples distributed in Gyeonggi province in Korea were collected according to species and country of origin. A total of 284 mushrooms, belonging to 10 species (Lentinula edodes, Pleurotus ostreatus, Pleurotus eryngii, Agaricus bisporus, Flammulina velutipes, Phellinus linteus, Inonotus Obliquus (Chaga), Auricularia auricula-judae, Ganoderma lucidum and Tricholoma matsutake) were subjected to radioactivity testing. The concentration of artificial radionuclides, 131I, 134Cs, and 137Cs, was analyzed using gamma-ray spectrometry. 131I and 134Cs were not detected more than MDA value from all samples. Among 204 domestic mushrooms, however, 137Cs were detected in 0.21~2.58 Bq/kg from six cases (3 Lentinula edodes, 1 Ganoderma lucidum and 2 Tricholoma matsutake), whereas 137Cs were detected in 0.21~53.79 Bq/kg from 38 cases (22 Inonotus Obliquus(Chaga), 14 Phellinus linteus, 1 Lentinula edodes and 1 Tricholoma matsutake) among 80 imported mushrooms. In addition, average concentration of 137Cs in 10 Chaga mushroom-processed products was more than twice as much as dried Chaga mushroom, and maximum concentration was 123.79 Bq/kg. Results suggest that radioactivity monitoring system for imported mushrooms and mushroom-processed products should be continuously intensified to secure food-safety in Korea.

• Journal of Astronomy and Space Sciences
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• v.22 no.4
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• pp.537-558
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• 2005

This paper addresses the results of HAUSAT-2 radiation environment and effect analyses, including TID and SEE analyses. Trapped proton and electron, solar proton, galactic cosmic ray models were considered for HAUSAT-2 TID radiation environment analysis. TID was analyzed through total dose-depth curve and the radiation tolerance of TID for HAUSAT-2 components was verified by using DMBP method and sectoring analysis. HAUSAT-2 LET spectrum for heavy ion and proton were also analyzed for SEE investigation. SEE(SEU, SEL) analyses were accomplished for MPC860T2B microprocessor and K6X8008T2B memory. It was estimated that several SEUs may occur without SEL during the HAUSAT-2 mission life(2 years). Software Hamming Code EDAC has been implemented to detect and correct the SEU. In this study, all radiation analyses were conducted by using SPENVIS software.

• Nuclear industry
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• v.15 no.4 s.146
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• pp.76-82
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• 1995

원자력발전소는 설계$\cdot$제작$\cdot$건설$\cdot$운전 등 전 단계에 걸쳐 철저한 안전성 확인과 안전을 최우선적으로 인식하는 원자력안전문화의 확산 등을 통하여 사고의 가능성을 최소화해 나가는 것이 무엇보다도 중요하다고 하겠다. 그리고 비록 발생 가능성은 희박하지만 사고의 잠재성에 따라 피해를 최소화하기 위한 방사능방지대책을 미리 강구하여, 사고가 발생하였을 경우 신속하고 총체적인 대응능력을 발휘하여 인근주민과 환경을 보호해야 할 것이다.

• 대한방사선방어학회:학술대회논문집
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• 2011.11a
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• pp.248-249
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• 2011

• Journal of the Korea Society for Simulation
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• v.19 no.4
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• pp.123-128
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• 2010

The space radiation/total ionizing Dose(TID) and its effects, and the GEO satellite system design considerations in space radiation environment are studied in this paper using Spenvis(Space Environment Information System). The GEO satellite system in space environment is simulated by NASA AP8/AE8, JPL91 and NRL CREME models, repectively for trapped particle, solar proton and cosmic-ray. The total ionizing Dose which is accumulated continuously to spacecraft electronics has been expressed as the function of aluminum thickness. These values can be used as the criteria for the selection of electronic parts and shielding thickness of the Digital Channel Amplifier(DCAMP) structure.

• Bulletin of Korea Environmental Preservation Association
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• v.11 no.12
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• pp.33-33
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• 1989

• Nuclear industry
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• v.17 no.2 s.168
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• pp.19-32
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• 1997

원자력발전소 안전성 확보의 가장 중요한 요소는, 원전 시설 내에 근무하는 종사자와 원전 주변 주민은 물론, 생활 환경을 방사선과 방사성 물질로부터 보호하고, 원전운영으로 인한 각종 영향이 법적 제한치 이내에서 최소화되도록 관리하는 것이다. 방사선 안전 관리가 제대로 이루어질 때 국민적 신뢰가 확보되고, 원전 사업 기반은 더욱 튼튼하게 뿌리를 내리게 될 것이다. 96년도에 수행한 주요 방사선 안전 관리 실적에 대해 방사선 관리, 방사성 폐기물(이하 방사물) 관리, 환경 방사능 관리, 방사능 재해 등의 분야로 나누어 점검해 본다.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2001.11a
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• pp.127-128
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• 2001

라돈은 사람들이 노출되는 자연 방사능 중 가장 큰 부분을 차지하며, 전체 자연 방사능 중 약 50%를 차지한다. 라돈의 인체영향 대부분이 호흡을 통한 인체 내에 유입에 의한 것으로 알려져 있다. 라돈에 의한 인체영향과 대기 중 오염물질의 장거리 이동에 대한 연구를 위해 대기 중 라돈의 거동특성 연구가 필요하다. 또한 라돈농도의 지역적 분포와 시간변화에 대한 정보는 지역적 특성, 라돈의 배출, 대기 중 습성에 대한 라돈 연구에 중요하다. (중략)