• Nuclear industry
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• v.36 no.8
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• pp.54-60
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• 2016

• Journal of Radiation Industry
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• v.12 no.4
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• pp.343-348
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• 2018

Preliminary study was perfomed to develop a biocompatible filter material using radiation energy. Electrosppined PLLA nano sheets were surface-modificated with hydrophilic groups(acrylic group) by using radiation. The physico-chemical and morphological characteristics of modified PLLA sheets were measured by ATR, SEM, contact angle, and hydrophilic (acryl group) introduction rate (TBO). As a result, there was no morphological(fiber structure) structure change due to radiation, and it was confirmed that an acrylic group was successfully introduced onto PLLA fiber sheet by radiation.

• Journal of Radiation Industry
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• v.10 no.1
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• pp.21-27
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• 2016

Periodontitis is disease of damaged gum tissue that is not removed the plaque onto teeth. In case that the symptoms of disease get pain worse, it will have to extract tooth because of tumefy or bleeding at gums so treatment of drug was required to periodontitis. In this study, the hydrogel was prepared by including superior viscous, excellent elastic, and biocompatibility of Poly(vinyl alcohol, PVA) and antimicrobial drug of Metronidazole (MD). The 15 wt% PVA was dissolved in deionized water and then prepared PVA solution was irradiated using gamma-ray at 25 kGy ($10kGy\;hr^{-1}$). In addition, PVA hydrogel was immersed in each 0.1, 0.25 and 0.5 wt% MD solution using stirrer for 24 hr. The result of the gelation, 0.5 wt% MD loaded PVA hydrogel(76%) was lower than PVA hydrogel (88.2%). The swelling ration of 0.5 wt% MD loaded PVA hydrogel (294.8%) was higher than PVA hydrogel (105.2%). The compressive strength and thermal properties of MD loaded PVA hydrogel was gradually lower. The drug release test of 0.5 wt% MD loaded PVA hydrogel (61%) was higher than 0.1 wt% MD loaded PVA hydrogel (12%). Therefore, MD loaded PVA hygrogel may be a promising tool for periodontitis medicine by gamma-ray.

• Journal of Radiation Industry
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• v.5 no.3
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• pp.231-236
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• 2011

'Ggoma' is a new Hibiscus dwarf type variety developed by gamma irradiation at the Korea Atomic Energy Research Institute (KAERI). This study was conducted to determine the best optimum cultural callus formation and shoot regeneration condition. Sterilized leaf tissues were cultured on MS (Marashige and skoog's) medium containing 3% sucrose, 0.8% agar with different concentration and combination of TDZ, 2, 4-D, KT, BA, and 2iP for 4 weeks in vitro culture. MS medium containing 2,4-D $0.1mg\;l^{-1}$ and BA $0.5mg\;l^{-1}$ were most effective on callus formation and growth. After 4 weeks, callus was transferred on BA (0.5, 1, $1.5mg\;l^{-1}$) and TDZ (0.1, 0.2, $0.3mg\;l^{-1}$) for shoot formation. The best condition for inducing the shoot from callus was BA $1.5mg\;l^{-1}$ and TDZ $0.3mg\;l^{-1}$. This result will be useful for the rapid multiplication of Hibiscus syriacus L.var. Ggoma.

• Proceedings of the Korean Nuclear Society Conference
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• 1997.05b
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• pp.624-629
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• 1997

최근 정부는 원자력발전분야와 비발전분야와의 균형발전을 도모하여 실질적인 원자력기술선진국을 추구하고자 방사선 및 방사성동위원소 이용분야의 활성화에 큰 관심을 가지게 되었고 이의 정책화를 위하여 $\ulcorner$방사선 및 방사성동위원소 이용진흥 종합계획$\lrcorner$을 수립하고자 하고 있음에 따라 본 이용진홍 종합계획을 수립을 위하여 고려되어야 할 사항과 방향에 대하여 논의하였다. 본 논문에서는 기술개발과 산업활성화는 항상 연계되어 추진되어야 하고 이를 제도적으로 지원할 제도개선 사항의 우선적 추진이 필요하다고 본다. 리고 이를 효과적으로 달성하기 위하여 먼저 재원의 안정적 확보와 관련 분야의 구심체 육성 및 기술개발 초기단계에서부터 산ㆍ학ㆍ연 협력을 통하도록 하는 전략이 중요하다.

• Proceedings of the Korean Nuclear Society Conference
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• 1997.05b
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• pp.365-372
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• 1997

이 연구의 목적은 밀도측정 및 수분함량측정용 RI 계기의 개발에 있다. 방사성동위원소를 이용하여 성토시공의 현장다짐 밀도 및 수분함량 측정에 이용되곤 있는 RI 계기는 중성자 검출부분, 감마선 검출부분, 고전압 공급부분, 마이크로 컴퓨터 부분으로 크게 나눌 수 있다. 감마선을 검출하는 G-M 검출기는 그 특징으로 인해 방사선검출 전기회로가 간단하다. 그러나 열중성자를 검출하는 He-3 검출기는 검출기에서 발생하는 신호원이 매우 작아서 검출회로의 상호 간섭으로 인한 전기적 잡음이 발생한다 이 잡음을 제거하는 것이 He-3 중성자 검출기로 열중성자를 검출하는데 중요한 문제이다. 본 연구에서 제작하는 RI 계기는 원자력법에서 제한하는 방사능 이하를 (100$\mu$Ci 의 밀봉선원) 사용하므로 종래의 RI 계기에 비해 방사선의 검출수가 줄어든다. 이에 따라 검출기의 개수를 늘려서 방사선을 검출해야 한다. 또한 본 연구에서는 He-3검출기의 검출 스펙트럼을 분석하여 적정한 방사선 검출 측정영역을 결정하였다.

• Journal of Radiation Protection and Research
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• v.39 no.4
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• pp.187-198
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• 2014

I developed a curriculum reflecting the perspectives of students, science teachers, and professionals in order to carry out standardized, fundamental nuclear power and radiation education in schools. Among elementary, middle, and high schools, 78.4%, 78.6%, and 93.1% respectively exhibited (with high frequency) a need for nuclear power and radiation education. The proposed elementary and middle/high school course titles are "Radiation and Life" and "Nuclear Power and Radiation" respectively. The courses are offered at every grade level and span one semester each year. The duration of each weekly class varies; at the elementary, middle, and high school levels classes meet for 40, 45, and 50 minutes respectively. Thin textbooks containing an abundance of cartoons and photos were requested. The starting points for education were fixed at the sixth grade, second year of middle school, and the first year of high school. It was stipulated that the education be separate from the regular curriculum, and encompass a creative and experimental field study based on the principal and science teachers' needs. Similar trends were observable according to grade levels regarding class hours, textbook format, form of education, and educational necessity. A simulation of the devised curriculum revealed an overall goodness of fit totaling $3.88{\pm}0.60$, $3.89{\pm}0.60$, and $3.66{\pm}0.63$ out of five for elementary, middle school, and high school students respectively, which are scores equivalent to 70 and above (out of 100). The significance of this study is that it is the first to propose a curriculum designed to cultivate value judgment based on understanding nuclear power and radiation. However, the realization of nuclear power and radiation education requires that follow-up measures be taken regarding textbook development, amendments to related laws, and the providing of teaching plans.

• Food Science and Industry
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• v.43 no.1
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• pp.53-63
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• 2010

• Proceedings of the Korean Nuclear Society Conference
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• 1998.05b
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• pp.683-690
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• 1998

국내의 원자력 관계법령은 1965년에 발표된 ICRP-9 권고안에 기초하고 있다. 그러나, 최근 국내 규제기관에서는 ICRP-60 권고안을 수용하는 새로운 방사선량 체계 및 한도등을 포괄한 원자력관계법령 개정 최종(안)을 마련하였고 이를 곧 시행할 예정임에 따라 현행 법령이 적용된 원자력시설의 설계 및 운영에 있어서는 적지않은 변경이 불가피하다. 본 논문에서는 이로인한 영향중의 하나로 ICRP-60 권고안을 적용하여 설계중인 신규원전의 기체유출물 방사선감시기에 대한 경보설정치를 산정하였으며, 비교를 위해 현행 법령이 적용된 기존원전에 대한 경보설정치 산정방법을 소개하였다. 이와함께 기존원전에 사용된 DRL (Dose Rate Limit, 선량률한도) 방식과 이를 보다 효과적으로 개선한 ECL (Effluent Concentration Limit, 방출농도한도) 방식을 소개하였으며, 각각의 방식에 의해 산정된 경보설정치를 상호 비교하여 ECL 방식의 효율성과 정확성을 입증코자 하였다. 마지막로는 국내 원전에 설치, 가동중인 기체유출물 방사선감시기에 대해 개정될 국내 법령의 적용과 보다 정확한 경보설정치 산정을 위한 작업이 수행되어야 할 것이며. 이러한 결과가 계통에 반영되어 운전되어야할 것임을 제안하였다.

• 대한방사선치료학회:학술대회논문집
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• 2005.04a
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• pp.21-21
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• 2005