• 제목/요약/키워드: Safety case

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처분방사능량제한치를 고려한 중저준위 방사성폐기물 처분시설의 핵종재고량 산정(안) (Prediction of Radionuclide Inventory for Low- and Intermediate-Level Radioactive Waste by Considering Concentration Limit of Waste Package)

  • 정강일;김민성;정노겸;박진백
    • 방사성폐기물학회지
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    • 제15권1호
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    • pp.65-82
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    • 2017
  • 방사성폐기물 발생기관의 가용데이터를 기반으로 산출된 핵종재고량을 적용하여 예비안전성평가를 수행한 결과 처분안전성과 운영측면에서 많은 어려움이 예상됨을 확인하였다. 본 논문에서는 전체처분시설 예비안전성평가를 수행하였으며, 평가결과 성능목표치 초과핵종에 대해 방사능량이 큰 비중을 차지하는 단위포장물을 선별하고, 높은 표면선량률의 포장물을 처분대상에서 제외하는 방식으로 처분시설의 처분방사능량제한을 도입하였다. 처분방사능량제한은 안전기준 만족을 위한 처분시설별 인수기준과 처분기준 설정에 기초자료로 활용할 것이며, 경주 처분시설의 안전한 종합개발계획수립 및 처분시설의 안전성 최적화를 위한 Safety Case 구축에 기여할 것으로 판단된다.

원전 디지털 원자로보호계통 소프트웨어 안전보증 패러다임 적용 및 분석 (Application and Analysis of the Paradigm of Software Safety Assurance for a Digital Reactor Protection System in Nuclear Power Plants)

  • 권기춘;이장수;지은경
    • 정보과학회 컴퓨팅의 실제 논문지
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    • 제23권6호
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    • pp.335-342
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    • 2017
  • 원자력발전소 안전-필수 소프트웨어를 개발하고 검증 및 확인을 수행하여 규제기관으로부터 인허가를 받기 위하여 단순하게 문서를 읽고 검토해서는 개발, 구현 및 검증활동에 대한 신뢰성과 안전성 확보에 대하여 정확하게 판단하기가 쉽지 않다. 따라서 이러한 활동, 특히 안전보증 활동이 소프트웨어 결함이 허용가능한 수준인지 판단하기 위한 체계적인 평가기술이 필요하다. 본 연구에서는 원전 디지털 원자로보호계통의 비교논리 프로세서와 동시논리 프로세서를 대상으로 제작자가 수행한 개발 및 검증 결과물의 수준과 깊이를 평가하기 위해 안전진술(Safety case) 방법론을 적용하고 그 결과를 분석한다. 안전진술 방법론 적용으로 기존의 안전입증 방법을 효과적으로 보완할 수 있음을 확인하였다.

활주로종단안전구역의 위험빈도 추정 연구 (A Study on Risk Frequency Estimation of Runway End Safety Area)

  • 김도현;신동진
    • 한국항공운항학회지
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    • 제18권3호
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    • pp.34-41
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    • 2010
  • 'Aviation Safety' is the state in which the risk of harm to persons or of property damage is reduced to, and maintained at or below, an acceptable level through a continuing process of hazard identification and risk management in the aviation field. 'Risk' is the assessed potential for adverse consequences resulting from a hazard and 'Risk assessment' involves consideration of both the frequency and the severity of any adverse consequence. This study focused on the risk frequency about a case airport which does not meet the 'Runway end safety area' requirement of ICAO SARPs and Korea standards and used 'RSA risk model' for estimating the risk frequency. As results of this study, risk frequency of the runway end safety areas in the case airport is higher than that of 'Runway end safety area' requirement of ICAO SARPs and Korea standards, which means that alternatives for risk frequency mitigation to a level as low as reasonably practicable is required in the case airport. The optimum solution analysed from this study is to impose restriction of aircraft operation when the runway condition is poor(icing condition) and also it snows in the case airport.

건축물의 화재 시 피난안전성 평가 개선을 위한 시뮬레이션 분석 연구 (A Study on the Analysis of Simulation for Improvement Evacuation Safety Assessment of Building in Fire)

  • 김혜원;김윤성;이병흔;진승현;구인혁;권영진
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2020년도 가을 학술논문 발표대회
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    • pp.107-108
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    • 2020
  • There is a need to analyze various factors in evacuation safety assessment of building in fire. In the current performance based design, evacuation safety assessment in case of fire is being conducted through the simulation as FDS and Pathfinder. However, the location and size of the door, the location of evacuation in the event of a fire are not considered when design. Accordingly, it is difficult to determine the worst case scenario considering the actual fire. Therefore in this study, in this study, we will propose an appropriate evaluation plan through simulation considering the worst-case scenario that may occur in case of fire.

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Progressively gangrenous limbs in Korean indigenous calves

  • Kim Bum-Seok;Camer Gerry Amor;Berzina Dace;Chekarova Irina;Zeeshan Muhammad;Borisova Irina;Blank Ivar;Ejaz Sohail;Park Hee-Jin;Kwon Jung-Kee;Lim Chae-Woong
    • 한국동물위생학회지
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    • 제29권4호
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    • pp.493-496
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    • 2006
  • This study investigated cases of progressively necrotizing limbs in Korean indigenous calves. The recent case (Case 1) involved a 3-month old, male calf in Jeonbuk province that presented a visibly dry form of gangrene affecting joints of the forelimbs and the hind limbs. Radiograph revealed osteoarthritis possibly resulting from pressure of disrupted joint skin, fasciae, deeper underlying musculatures and tendon. Histopathology of affected tissue showed necrotizing; severely thrombosed dilated blood vessels with rechanneling microvasculatures. The lack of substantial infectious inflammatory exudates in the vital organs and the inability to respond to antimicrobial treatment bolstered the notion that the observed thromboembolic and vascular lesion was attributed to possible vasoconstrictive effects of ergot alkaloids. Case 2: A previously encountered similar case in a 4-month old, male calf showing gangrene of hind limbs and posterior ataxia was likewise presented. These two cases were impressed as probable ergotism. Ergotism may be uncommon or underreported in Korea. Future isolation of ergot alkaloids in feeds or in pasture is highly suggested.

철도신호시스템의 안전 설계를 위한 개선된 안전성 적용 조건 도출 방법 (An Improved Method of Developing Safety-Related Application Conditions for Safety Design of Railway Signalling Systems)

  • 백영구;이재천
    • 한국산학기술학회논문지
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    • 제18권11호
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    • pp.31-45
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    • 2017
  • 철도 분야에서의 최근 수년간의 사고 통계에 의하면, 관련 기술 발전과 안전정보 관리시스템의 구축으로 사고발생 빈도가 현저히 줄고 있다. 그럼에도 불구하고 운영 및 유지보수에서의 오류와 안전설계에서의 결함으로 인한 사고는 지속적으로 발생하고 있다. 이에 따라 철도사고를 예방하기 위해, 철도차량 개발 시 안전성을 고려하는 설계 및 제작을 위한 지침이 작성되었고, 이와 더불어 안전 설계에 대한 독립적인 안전성평가의 수행에 대한 요구가 제시되었다. 이를 충족시키기 위해 철도시스템 개발업체는 안전성 활동 산출물인 Safety Case를 작성해야 한다. 이에 따라 Safety Case의 주요 항목 중 하나인 안전성 적용조건 (SRAC: Safety-Related Application Conditions)의 도출 및 관리에 대한 중요성이 커지고 있다. 지금까지 보고된 SRAC에 관한 연구 결과에서는 도출 절차의 간략성과 설계단계에서의 특정 안전성 활동 분석 방법에만 초점을 맞추고 있다. 이러한 방법은SRAC 항목 들을 빠르게 도출 할 수 있는 장점이 있지만, 안전성 측면에서 고려되어야 할 중요한 항목들이 누락될 위험이 존재한다. 이러한 문제를 해결하기 위하여 본 논문에서는 시스템 수명주기 전반에 걸쳐 안전성 설계 및 안전성 평가 활동을 수행하고 이를 기반으로 SRAC의 도출방법의 개선 방안을 제안한다. 이렇게 함으로써 SRAC를 보다 체계적으로 도출 및 관리를 수행할 수 있는데, 특히 설계 초기단계에서부터 SRAC를 고려함으로써 안전성 요구사항을 최대한 반영한 안전설계가 가능하다. 또한 철도신호시스템에 대한 적용사례 연구를 통하여 본 논문에서 제시하는 방법이 시스템 수명주기 전체에 걸쳐 SRAC를 고려함으로써 중요한 안전성 관련 항목들의 누락이 줄어들 수 있음을 보여준다.

A Study on the Safety Perception, Ethical Awareness, and Safety Activities of Nursing Students

  • Keum-Bong Choi
    • International journal of advanced smart convergence
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    • 제12권4호
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    • pp.407-417
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    • 2023
  • The purpose of this study is to identify the level of safety perception, ethical awareness, and safety activities of nursing students for patients, and to identify the correlation and impact between them. The research design is a descriptive survey study, and the subject of the study were 197 nursing college students in G City. Safety perception, ethical awareness, and safety activity tools were used for, and the data collection period was from October 17 to 28 in 2022. T-test, one-way ANOVA, Pearson's correlation coefficient, Regression analysis were used to analyze data. The result of the study indicated that the average level of safety perception of nursing students was 3.72 points, the average ethical awareness of patients, professional work, and cooperators perceived by nursing students was 3.04 points, and the safety activities of nursing students were 4.20 points. In the case of safety awareness and ethics awareness, r=.327, a significant positive correlation, in the case of safety awareness and safety activities, r=.399, significant positive correlation, ethics awareness and safety activities as r=.296. And so on these results showed that high safety perception increases safety activities, and high ethical awareness increases safety activities. Therefore, we need practical and step-by-step convergence education to equip nursing students with patient safety nursing capabilities. To this end, a safer environment will be created if the social support network for the systematic application of safety education is well formed.

근육전위을 이용한 회음허니아의 교정 (Surgical Corrections of Perineal Hernia by Muscle Transposition in Dogs)

  • 이해범;최성진;이철호;전승기;최인혁;김남수
    • 한국임상수의학회지
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    • 제22권4호
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    • pp.435-438
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    • 2005
  • Two dogs (case 1:2-year-old intact male German Shepherd-mixed dog and case 2: 4-year-old intact female Jindo miked) with perineal hernia were referred to the Chonbuk Animal Medical Center, Chonbuk National University. In the both cases, there were unilateral perineal swelling involving the right side of the anus. In addition, in case 2, swelling was also present ventral to the anus. Rectal palpation of pelvic diaphragm revealed weakness of the muscles. Both cases were surgically treated using muscle transposition technique for hemiorrhaphy. In case 1, transposition of the superficial gluteal and internal obturator muscles and in case 2, transposition oi semitendinosus muscle was performed for hemiorrhaphy and reconstruction of the pelvic diaphragm. Both dogs became recovered after the surgical correction and no complications were observed during 10-month (casel) and 9-month(case2). Muscle transposition can be a useful technique for the treatment of perineal hernia in the dog.