http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Process for Regulatory Clearance of Radioactive Waste at KAERI
Han Byeol Kang,Dong-su Kim,Tack-Jin Kim,Hyun Myoung Jung,Ji Ung Choi 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.2
There is a large amount of radioactive waste in waste storage in the Korea Atomic Energy Research Institute. Some of the radioactive waste was generated during the dismantling process due to Korea Research Reactor 1&2 and it accounts for 20% of the total waste. Radioactive waste must be reduced by appropriate disposal methods to secure storage space and to reduce disposal costs. Research Reactor wastes include wastes that are below the acceptable criteria for selfdisposal and non-contaminated wastes, so they can be treated as wastes subject to self-disposal through contamination analysis and reclassification. In order to deregulation radioactive waste, it is necessary to meet the self-disposal standards stipulated in the Domestic Nuclear Act and the treatment standards of the Waste Management Act. The main factors of deregulation are surface contaminant, radionuclide activity and dose assessment. To confirm the contamination of waste, surface contaminant and gamma nuclide analysis were performed. After homogenizing the waste sample, it was placed in 1 L Mariinelli beaker. When collecting waste samples, 1 kg per 200 kg of waste was collected. The concentrations of the major radionuclides Co-60, Cs-134, Cs-137, Eu-152, and Eu-154 were analyzed using HPGe detector. To evaluate radiation dose, various computational programs were used. A dose assessment was performed with the analyzed nuclide concentration. The concentrations of representative nuclides satisfied the deregulation acceptance criteria and the results of the dose assessment corresponding to self-disposal method was also satisfied. Based on this results, KAERI submitted the report on waste self-disposal plan to obtain approval. After final approval, Research Reactor waste is to be incinerated and incineration ash is to be buried in the designated place. Some metallic waste has been recycled. In this study, the suitability of deregulation for self-disposal was confirmed through the evaluation of the surface contaminant analysis, radionuclide concentration analysis and dose assessment.
A case of widespread scleredema
( Byeol Han ),( Tae Young Han ),( June Hyunkyung Lee ),( Sook Ja Son ),( Sang Hwa Han ),( Kang Hoon Lee ),( Joon Hee Kim ),( Myeong Hyeon Yang ),( Min Soo Jang ),( Kee Suck Suh ) 대한피부과학회 2015 대한피부과학회 학술발표대회집 Vol.67 No.1
Scleredema is a rare sclerodermatosis which is characterized by wooden, diffuse, non-pitting induration of the skin due to accumulation of collagen and mucopolysaccharides in the dermis. Although the pathogenesis remains elusive, associations with infection, diabetes mellitus, and paraproteinemia have been established. A 71-year-old man presented with 4-month history of widespread skin thickening, initially noted onthe abdomen. The patient had no history of diabetes mellitus or preceding febrile infection. Physical examination disclosed a symmetric erythematous woody and non-pitting induration on the neck, shoulders, trunk, and all extremities. Raynaud phenomenon and dysphagia were not noted. Routine laboratory tests, systemic radiologic and hematologic investigations revealed no evidence of malignancy. Antinuclear antibody was weakly positive, and anti Scl-70 antibody was positive. Histopathologic examination showed extreme thickening of the dermis. Deep dermis contained enlarged bundles of collagen separated from one another. Alcian blue stain demonstrated abundant mucin deposits between collagen bundles. Based on the clinical and histological features, the patient was diagnosed with scleredema. He was treated with oral cyclosporine and steroid and most lesions were resolved. Here in, we reported a rare case of widespread scleredema accompanied in the absence of preceding febrile infection or diabetes mellitus.
Process for Regulatory Clearance of Wood Waste at KAERI
Han Byeol Kang,Jong Kwang Lee,Tack-Jin Kim 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.2
In KAERI, Waste storage facility in the radiation management area has stored a large amount of wood waste. The amount of waste is approximately 27,000 kg, it accounts for 17% of the total waste in waste storage facility. Proper disposal of wood waste improves the fire resistance performance, secure storage space and reduce disposal costs. In order to self-disposal of wood waste, it is necessary to satisfy the self-disposal standards stipulated by the domestic Atomic Energy Act and the treatment standards of the Waste Management Act. The main factors of standards are surface contaminant, radionuclide activity and radiation dose effects. To confirm the contamination of wood waste, direct indirect measurement methods and gamma nuclide analysis were performed. To evaluate radiation dose, various computational programs were used. The results of the analysis were satisfied with domestic regulations on the classification and self-disposal of radioactive wastes. Based on this results, KAERI submitted the report on wood waste self-disposal plan to obtain approval. After final approval, wood waste is to be incinerated and incineration ash is to be buried in the designated place. The objective of this study is to provide total procedure of wood waste self-disposal and effective representative sampling method.
Calculation of Radiation Dose Using Computational Program NRCDOSE
Han Byeol Kang,Ki-Baek Shin,Tack-Jin Kim 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.2
In general, dose assessment must be performed to obtain approval for clearance of radioactive waste. If the annual dose criteria through dose evaluation satisfies the clearance condition, radioactive waste can be disposed of. Various programs are used to perform dose assessment. NRCDOSE GASPAR is used as a program to assess the amount of radiation exposed to atmospheric emissions. Program is easy to use and results can be checked immediately after execution. GASPAR requires main input factors by exposure route such as site specifics, source term, special location, block data. Basically, program has default input values but user can easily modify it. The most important factor is that when entering a nuclide, the effect on progeny radionuclides is not automatically calculated. User should consider the dose contribution from progeny radionuclides. In this study, dose assessment was performed for combustible waste incineration using NRCDOSE GASPAR. And it was confirmed that exposure dose of individuals and groups criteria for clearance regulation.
파력발전기 지지구조의 강도평가 및 형상 Guideline 제시
정한별(Han Byeol Jeong),김대현(Dae Hyeon Kim),오근원(Keun Won Oh),임재한(Jae Han Lim),유병석(Byeong Seok Yu),홍기용(Key Yong Hong),이강수(Kang Su Lee) 한국해양환경·에너지학회 2016 한국해양환경·에너지학회 학술대회논문집 Vol.2016 No.5
부유식 파력-해상풍력 연계형 발전시스템 중 파력발전기 지지구조물은 설계수명동안 파랑에 의한 압축력, 굽힘하중, 전단력 등의 하중을 받는다. 이는 파력발전기 지지구조물의 최종강도에 영향을 미치게 되며, 한 장소에 장기간 머무는 구조물의 특성상 최종강도를 만족하는 구조물을 설계하는 것은 매우 중요한 요소이다. 본 연구에서는 다양한 형상의 파력발전기 지지구조물에 대해 검토하였으며, 정적해석을 통하여 강도평가를 수행하였다. 더 나아가 파력발전기의 유지보수가 용이한 형상의 파력발전기 지지구조물에 대한 guideline을 제시하고자 한다. Wave Energy Converter(WEC) guide frame, among the wave-offshore wind hybrid power generation system, is pressured by compression, bending and shear load from the waves during its design life. These factors affect the ultimate strength of the WEC guide frame; and considering the nature of a structure which stays in one place for a long time, it is highly significant to design such structure satisfying the characteristics of ultimate strength. This study examined the WEC guide frame in various forms and strength assessment was conducted through linear static analysis. Furthermore, this study proposes a guideline for the WEC guide frame in a form where maintenance work is facile.