• 방사성폐기물학회지
• /
• 제16권2호
• /
• pp.271-279
• /
• 2018

국내 경수로형 원전의 사용후핵연료 소내 습식저장 용량의 포화에 대비하기 위해 정부 주도로 2009년부터 2016년까지 7년에 걸쳐 국내 여건에 적합한 수송/저장시스템을 개발하였다. 시스템은 운반과 저장을 겸할 수 있는 금속겸용용기와 저장전용인 콘크리트 저장용기로 효율적인 기술개발을 위해 관련 산학연의 특성과 경험을 적극 활용하여 국내고유 모델을 개발하였고 특허 등록을 추진하여 기술의 독립성도 확보하였다. 현재까지 확보한 다수의 특허 및 기술을 산업계에 개방하여 국내 수요에 대처하고자 2016년과 2017년 두 차례에 걸쳐 기술이전도 추진하였다.

• Journal of Biosystems Engineering
• /
• 제20권2호
• /
• pp.151-161
• /
• 1995

A basic proposal on the design of a grain drying and storage system was suggested for the bulk facilities of grain custody warehouses. A model square silo system was designed and developed on the basis of the proposal. A square silo system made of steel plate was developed with a stirring device, an automatic moisture meter and an auto-control system of PLC. Then, the developed square silo system was evaluated through drying experiments with rough rice. The square silo system could dry grains uniformly with a stirring device and an auto-control system regardless of grain depth. The developed square silo system can be well adapted for the bulk facilities of grain custody warehouses.

• 방사성폐기물학회지
• /
• 제21권4호
• /
• pp.503-516
• /
• 2023

A transfer cask serves as the container for transporting and handling canisters loaded with spent nuclear fuels from light water reactors. This study focuses on a cylindrical transfer cask, standing at 5,300 mm with an external diameter of 2,170 mm, featuring impact limiters on the top and bottom sides. The base of the cask body has an openable/closable lid for loading canisters with storage modules. The transfer cask houses a canister containing spent nuclear fuels from lightweight reactors, serving as the confinement boundary while the cask itself lacks the confinement structure. The objective of this study was to conduct a structural analysis evaluation of the transfer cask, currently under development in Korea, ensuring its safety. This evaluation encompasses analyses of loads under normal, off-normal, and accident conditions, adhering to NUREG-2215. Structural integrity was assessed by comparing combined results for each load against stress limits. The results confirm that the transfer cask meets stress limits across normal, off-normal, and accident conditions, establishing its structural safety.

• Journal of Radiation Protection and Research
• /
• 제37권4호
• /
• pp.197-201
• /
• 2012

경수로 사용후핵연료 중간저장시설의 부지면적을 산출하기 위하여 콘크리트 저장시설 개념모델의 연간선량을 계산하였다. 초기농축도 4.5 wt%, 연소도 45,000 MWd/MTU, 냉각기간 10년인 사용후핵연료를 대상으로 ORIGEN-ARP를 사용하여 선원항을 생산하였으며, MCNP 코드를 사용하여 저장시설에 대한 모델링 및 방사선차폐계산을 수행하였다. 연간선량은 저장시설의 용량별로 계산하였으며, 중앙집중식 저장시설의 경우, 반경 700 m 이상에서 10CFR72에서 권고하는 통제구역 경계에서의 연간선량 기준 0.25 mSv를 만족하였다.

• 한국방사성폐기물학회:학술대회논문집
• /
• 한국방사성폐기물학회 2018년도 추계학술논문요약집
• /
• pp.173-174
• /
• 2018

• 한국방사성폐기물학회:학술대회논문집
• /
• 한국방사성폐기물학회 2017년도 추계학술논문요약집
• /
• pp.119-120
• /
• 2017

• 한국식품영양학회지
• /
• 제7권2호
• /
• pp.151-158
• /
• 1994

This study was carried out to clear up the cause of low-acid producing phenomenon occurred In non-fat dry milk during liquid-yoghurt fermentation by Lactobacillus case, and to present its improving methods. All samples of non-fat dry milks which were low in TCA-soluble peptides showed low-acid production, but those high in TCA-soluble peptides showed high-acid production. The addition of trypsin-hydrolysate of Na-caseinate to non-fat dry milk showed some improving effect on acid production but that of papain-hydrolysate did not show any improving effect and that of bacterical neutral protease-hydrolysate showed some inhibitory effect. The improving effects on growth and acid production of lactic acid bacteria were more prominent when the trypsin-hydrolysate of Na-caseinate was added. to such fermenting system in which the levels of TCA-soluble peptides and the proteolytic ability of starter bacteria were abnormally low. The liquid-yoghurt made with non-hydrolysed Na-caseinate and defective non-fat dry milk showed precipitate occurrence but that with trypsin-hydrolysate of Na-caseinate and defective non-fat dry milk did not make any precipitate during storage as with normal non-fat dry milk.

• 한국방사성폐기물학회:학술대회논문집
• /
• 한국방사성폐기물학회 2003년도 가을 학술논문집
• /
• pp.627-631
• /
• 2003

사용후연료 저장과 관련된 규정 중 구조에 대한 예상운전사고 및 설계기준사고의 구조 안전성이 보장되도록 설계하여야 한다. 이러한 구조 평가항목으로서 낙하, 전복, 폭풍, 홍수 및 지진으로 인한 사고에 대하여 하중조건과 구조적 개념평가 방법을 제시하고, 콘크리트 저장시스템에 대한 예비 구조안전성 해석을 수행하였다.

• 한국태양에너지학회:학술대회논문집
• /
• 한국태양에너지학회 2011년도 춘계학술발표대회 논문집
• /
• pp.68-73
• /
• 2011

An experimental study was conducted to investigate the thermal performance of a medium-temperature heat pipe against the charge amount of working fluid. The container and the wick of the heat pipe were made of stainless steel and the working fluid was Dowtherm-A for medium-temperature applications around $250^{\circ}C$. The diameter and length of the heat pipe were 25.4 mm and 1 m, respectively. The maximum thermal load was 1 kW and the working fluid charge ratio varied from 372% to 420%. The results showed that the thermal resistance ranged from 0.12 to $250^{\circ}C/W$ and the effective thermal conductance ranged from 7,703 to $8,898 W/m{\cdot}K$. Dry-out occurred for the heat pipe with 372% fill-charge at the heat load of 950 W, while the other heat pipes with higher charge amount did not encounter dry-out up to 1060 W.

• 설비공학논문집
• /
• 제12권6호
• /
• pp.609-615
• /
• 2000

The energy conservation is one of the most important issues in recent years. Especially, the energy conservation through improved control strategies is one of the most highly possible area to be implemented in the near future. The energy conservation of the ice storage system can be accomplished through the improved control strategies. A real time building load prediction algorithm was developed. The expected highest and the lowest outdoor temperature of the next day were used to estimate the next day outdoor temperature profile. The measured dry bulb temperature and the measured building load were used to estimate system parameters by using the on-line weighted recursive least square method. The estimated hourly outdoor temperatures and the estimated hourly system parameters were used to predict the next day hourly building loads. In order to see the effectiveness of the building load prediction algorithm, two different types of building models were selected and analysed. The simulation results show less than 1% in error for the prediction of the next day building loads. Therefore, this algorithm may successfully be used for the development of improved control algorithms of the ice storage system.