Inconel 600 및 690 튜브 재질의 일반 부식에 관한 실험적 연구

염유선,황정래,전인섭,김숭평,윤장희,Yeom Yu-Sun,Hwang Jung-Lae,Jun In-Sub,Kim Soong-Pyung,Yoon Jang-Hee 한국방사성폐기물학회 2006 방사성폐기물학회지 Vol.4 No.2

By executing corrosion experiment on Inconel 600, 690 used to material of S/G tube in domestic NPP, this paper show estimation of amount of product such as Co-58, Co-60, Cr-51, Mn-54, Fe-59 which are main exposure cause to the workers in NPP. Therefore, Making the 12 samples consisted of Inconel 600, 690, whole corrosion experiment was carried out for 60 days(each pH by 20 days). The conditions of those tests were similar or more harsh than actual conditions of domestic NPP. The Glow Discharge Spectrometer(GDS) was used for quantitative analysis of results. The results of using GDS, the Inconel 600 corrodes more than Inconel 690 at pH 7 and pH 9. However, it is observed that Inconel 690 corrodes more than Inconel 600 at pH 4. Those results is estimated that test sections had the effect of transient. The long terms of experiment is required to minimize and solve the problem.

식품류를 이용한 방사선 방호 효과

김종수(Jong-Soo Kim),안병권(Byeong-Kwon Ahn),최현숙(Hyun-Suk Choi),최두복(Du-Bok Choi),염정민(Jung-Min Yeom),김숭평(Soong-Pyung Kim),이인성(In-Sung Lee),조미자(Mi-Ja Cho),차월석(Wol-Suk Cha) 한국생물공학회 2015 KSBB Journal Vol.30 No.1

Radiation causes various pathophysiological alterations in living animals, and it causes death at high doses by multiple mechanisms, including direct DNA damage and indirect oxidative stress. The search for useful radioprotectors has been an important issue in the field of radiation biology. Ideal radioprotectors should have low toxicity and an extended window of protection. As many synthetic compounds have toxic side effects, the natural products have attracted scientific attention as radioprotectors. Natural products that have been recently shown to be effective with various biological activities were found to have radioprotective effect. The aim of this review is to summary the recent research of the radioprotective effects of natural foods, especially focused on the glycobiological properties of mushrooms.

PWR 발전소에서 선량평가를 위한 모델 수립

염유선 ( Yu Sun Yeon ),김숭평 ( Soong Pyung Kim ) 조선대학교 공학기술연구원 2010 공학기술논문지 Vol.3 No.4

This paper establishes a model to evaluate the appropriate (14)C dose that inhabitants around PWR plants necessary, and to draw an input variables that there are necessary for dose evaluation. For this, analysis about existing materials were carried out by dose assessment model and application were based on analysis result. The development of animal product can be varied according to animal consumption, food contamination, the amount of carbon content in different animals and their organs. For this reason, it is judged that models used in the existing codes to assess the (14)C concentration of animal product must be improved fundamentally for hybrid model using transfer factors. this factors on each animal products hay to be developed. This study established transfer factor on milk and egg products for also the advantage of the result of CSA and KEPRI could be applied for transfer factor on other animal products, and to draw an input variables which can reflect on internal situation.

연구발표논문초록 ( 촉매 (Ⅲ) ) : 기 - 액상 자일렌 이성질화반응에서 제올라이트 촉매의 탈활성화

조철형 (정),송연호 (정),김숭평 (정) ( Chul Hyung Cho,Yon Ho Song,Soong Pyung Kim ) 한국화학공학회 1984 추계총회초록집 Vol.- No.-

액체섬광계수기 교정시 (3)H 선원의 농도 차이에 대한 영향 평가

염유선 ( Yu Sun Yeom ),한상준 ( Sang Jun Han ),김숭평 ( Soong Pyung Kim ) 조선대학교 공학기술연구원 2010 공학기술논문지 Vol.3 No.4

This study intends to count environmental samples accurately by liquid scintillation counter[LSC] instrument. For this, (3)H sources of 3,000, 500, 100 disintegration per minute[DPM] were used, and after variables that have an effect on the results of the measurements. A sensitivity study on each variable was performed. Based on the sensitivity study results, optimal counting condition on the counting instrument was deducted, and the effect was evaluated by activity differences. Radioactivity error analysis method was used to verify the calibration data. According to the results of the sensitivity study, Here repeat method and an external source exposure time of 75 sec was used, the measuring accuracy was about 1~3% better than when the existing method was used. According to verification study, The activity difference doesn`t appear nearly. However, because of the effect due to background, noise, etc at activity below of 1,000 DPM, the lower activity, And more error was increased based on these results. And also evaluated accurately the radioactivity of (3)H which can exist into environmental samples around NPP (Nuclear Power Plant). Therefore, it is judged in this paper that a repeat measuring method, irradiating time above 75 sec at least in calibration, and liquid (3)H standard source above 1,000 DPM have to be used.

제올라이트를 이용 핵폐기물의 흡착에 관한 연구

김숭평,장우양,최승평,박복남 조선대학교 원자력연구소 1990 原子力硏究 Vol.4 No.-

Synthetic zeolite A was prepared by reaction domestic Hadong Kaolin with sodium hydroxide solution and the sorption behavior of some typical fission products such as Sr, Ba, Ca on zeolite A were studied. It was observed that ion exchange capacities for cry stalline zeolite A were very effective. The selectivity series obtained from ion exchange standard Gibbs free energies were found to be Sr >Ba>Ca

A Study on the Oceanic Diffusion of Liquid Radioactive Effluents based on the Statistical Method

Kim,Soong-Pyung,Lee,Goung-Jin 대한방사선 방어학회 1998 방사선방어학회지 Vol.23 No.1

영광 원전 지역에 적용될수 있는 액체 방사성 물질의 확산 모델을 개발하였다. 영광에서의 해양 확산조건은 매우 복잡하기 때문에 수치적 모델을 적용하는 것은 매우 어렵다. 따라서 비교적 단순하면서도 신뢰성 있는 미규제 지침 1.113에서 제시한 통계적 모델을 적용하였다. 이를 통해, 발전소 운전조건이나, 피폭경로에 따른 희석 인자를 계산할 수 있는 컴퓨터 코드를 개발하였다. 액체 방사성 물질의 확산에 대해서, 혼합 범위를 따라 근거리 혼합 모델과 원거리 혼합 모델로 구분하여 모델을 개발하였다. 근거리 혼합 현상은 부력과 초기 운동량 및 난류에 의해 결정된다. 원거리 혼합에서는 대기 중의 구름확산과 유사하게 가우시안푸륨 모델을 적용할 수 있다. 서로 다른 피폭 경로에 대해 물리적 타당한 적분을 수행함으로서, 경로에 따른 희석인자를 구할 수 있었다. 개발된 모델을 사용하여 계산한 결과에 의하면, 현생 영광 ODCM에 사용되는 희석인자는 상당히 과평가되어 있음을 알 수 있다. A diffusion model of radioactive liquid effluents is developed and applied for YGN NPP's site, based on the Gaussian plume type model. Due to the complexity of oceanic diffusion characteristics of YGN site, a simple and reliable statistical model based on Reg. Guide 1.113 is developed. Also, a computer code package to calculate dilution factors as a function of plant operation conditions and pathway of radioactive materials. A liquid effluents diffusion model is developed by dividing the diffusion range into two categories, i.e., a near field mixing region and a far field maxing region. In the near field, the initial mixing is affected by a buoyance force, a high initial turbulence and momentum which is characterized by a plant operation condition and environmental conditions. The far field mixing is similar to gaseous effluents diffusion. So, beyond the near field region, welknown Gaussian plume model was adopted. A different area averages of Gaussian plume equation was taken for each radioactive exposure pathway. As a result, we can get different dilution factors for different pathways. Results shows that present dilution factors used for YGN ODCM is too much overestimated compared with dilution factors calculated with the developed model.

An Improvement on the Analysis Techniques of Environmental Radioactivity Around Nuclear Power Plants

Kim,Soong-Pyung,Chae,Gyung-Sun,Chung,Won-Kwan 대한방사선 방어학회 1995 방사선방어학회지 Vol.20 No.1

환경방사능 분석기술은 원자력시설의 가동중 정상 및 비정상 상태시 이상판단과 지역특성에 따른 주변환경 방사능의 특성 및 거동파악 등을 하는데 필요한 기술로 원전 가동전,후 환경 방사능량을 비교함으로서 방사능 오염 및 변화상황을 파악할 수 있다. 국내에는 현재 관련법에 따라 규제기관 및 관련기관에 의한 환경감시가 계속되어오고 있으나 분석기술에 대한 한국규격이 신뢰성이 떨어지고 있다. 따라서 토양시료에 대한 감마핵종 분석에 한정하여 기수행된 측정방법 및 결과 등을 비교분석하므로서 원전주변 환경방사능 감시목적에 적합한 분석기술의 신뢰도 향상 및 상대오차율 최소화 방안을 도출하였다. An estimate of a change in radioactivity's circumstances around the nuclear power plant is validated with the results of the radioactivity measurements are compared. In this study, to further enhance the reliability of the results obtained form the environmental radioactivity measurements and analysis around the nuclear power plants that have been carried out up to the present. In the korea standard, there is the technical analysis guide for general stable chemical element's, but there is not the technical analysis guide for the radio-nuclei, therefore the environmental sample collection, the pretreatment of the sample and radionuclide analysis in the sample, the result's of the environmental radioactivity measurements by each organization, etc. are different. It is not sufficient for the database to forecasting a change in radioactivity's circumstances. A comparative study of collection and pretreatment techniques for the soil sample, the results by comparison, the method of minimizing the relative error are proposed. At one side of sample collection, there are going to considered that the surroundings of sample collection like the lay of the land, the provision of the selection standard for the area and pathway of radionuclide adhesion, the coherence of sample collection, etc.. at another side of pretreatment of the sample and measurement in the case of soil sample, how to do homogeneously the soil particle size and the standard tools, i.e. kinds of meshes, must to be selected.

明礬石으로부터 肥料 및 알루미나의 抽出에 關한 硏究

宋連浩,金崧平,趙哲衡 朝鮮大學校 1975 綜合論文集 Vol.1975 No.-

방사성 폐기물의 지중처분에 관한 종합 안정성 평가 시스템의 개발

송종순,김숭평 조선대학교 원자력연구소 1990 原子力硏究 Vol.4 No.-

In relation to site selection, design, and safety evaluation for the final radioactive waste repository, the package of computer programs which calculate doses to humans from radioactive material leaked out of the geologic waste repository by leaching of the ground-water is developed. Concept of critical pathway along which any radionuclides that have escaped primary confinement system can reach the biosphere is used by approximating the steady-state ground-water flow pattern as network of one-dimensional flow paths. The system consists of three modules: In hydrologic modeling, one-dimensional ground-water flow code which simplifies the treatment of three-dimensional flow field by network representation of flow through the principal stream tubes, NETFLO is used and it calculates water and nuclide velocities and travel time. For geosphere transport modeling, analytical solution for layered media with fractures is developed, which incorporates radioactive decay, matrix diffusion, and linear sorption isotherm to give nuclide discharge rate, or biosphere transport modeling, PABLM calculates radionuclide transport in surface waters and ecosystems and human exposures on which site-selection criteria are to be based. This safely assessment system can be used both in analyzing non-homogeneous, complex geologic media or engineered repository system with discontinuities generated by perturbations such as shafts, boreholes, and corridors. With simple and efficient solving algorithms, this assessment system can also perform parametric or sensitivity studies with nominal cost, and worst case analysis to support repository and site assessments.