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KS C IEC 60079-10-1 규격의 무시할 수 있는 정도와 누출특성에 관한 연구
조필래,이향직,백종배,Cho, Pil-rae,Lee, Hyang-jig,Baek, Jong Bae 한국안전학회 2020 한국안전학회지 Vol.35 No.2
When KS C IEC 60069-10-1(2015) standard is applied to estimate a hazardous area, the chart showing the relationship between a hazardous area distance and release characteristic is used as a guide to determine the extent of hazardous zones for various forms of release. Three release characteristic lines based on the three types of release as an unimpeded jet release with high velocity, a diffusive jet release with low velocity, and a release of heavy gases or vapours that spread along horizontal surfaces are given. As these characteristic lines have the low limit threshold, it is difficult to estimate the hazardous area distance when the value of release characteristic is under the low limit threshold. And KS C IEC 60079-10-1(2015) standard shows the concept for a zone of Negligible extent(NE) which can be considered as non hazardous area, but it is also difficult to apply the concept of a Negligible extent. The purpose of this paper is to suggest the guideline for the release characteristic to decide a hazardous area distance and the Negligible extent(NE) being considered as non-hazardous area when deciding a hazardous area distances by the KS C IEC 60079-10-1 standard.
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ALOHA 프로그램을 이용한 도시가스 배관의 누출 모델링 최적화
조필래(Pil-rae Cho),이향직(Hyang-jig Lee),백종배(Jong Bae Baek) 한국위험물학회 2020 한국위험물학회지 Vol.8 No.2
Since the Process Safety Management(PSM) by Occupational Safety and Health Act has been introduced in Korea, the consequence analysis of chemical release has been actually implemented. The purpose of this paper is to suggest the guideline for the release modeling of natural gas piping. Applicable programs for the release modeling of gas pipeline are ALOHA, PHAST, etc. but ALOHA is the most reasonable program because of the benefit of cost-free and easiness to use. As the release rate in gas pipeline is largely depended on length of pipeline, it is very important to select the appropriate length of pipeline. As lots of company apply length of pipeline as the length between a gas governor and a gas burner, the result of these modeling can be different from an actual situation that is pressurized by the pipeline system of gas supplier. This paper studied the method to decide the length of pipeline by the comparison of the release rate between the infinite end piping connected to tank and closed off piping by using ALOHA program. And this paper also studied the modeling means for the low pressure pipeline under 2 atm(absolute) in pressure being not applied with the Gas pipe option of ALOHA.
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인화점 기반의 KS C IEC 60079-10-1:2015 표준의 인화성 액체 적용에 관한 연구
조필래(Pil-rae Cho),이향직(Hyang-jig Lee),백종배(Jong Bae Baek) 한국위험물학회 2020 한국위험물학회지 Vol.8 No.2
This paper is written to suggest the guideline for the flash point of flammable liquids when the KS C IEC 60079-10-1:2015 standard is applied for the hazardous area classification. Flammable liquid is defined as “liquid capable of producing a flammable vapour under any foreseeable operating conditions” in the KS C IEC 60079-10-1:2015 standard and an example of the flammable liquid is shown as the liquid that is handled at temperatures close to or above its flash point. Therefore the relationship between flash points and flammable liquids is not clear. Occupational safety and health act in Korea, Ministry of Employment and Labor notification(No. 1993-19), NFPA 497, API RP 505 and EI 15 are reviewed to compare the flash points for the application of the hazardous area classification and the guideline for flash points is suggested.
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류상일(Sang Il Ryu),이재은(Jae Eun Lee),이주호(Ju Ho Lee),양기근(Gi Geun Yang),조필래(Pil Rae Cho),문명환(Myong Hwan Moon),조성(Seong Cho),권설아(Seol A Kwon),김아연(A Yeon Kim),김지은(Jee Eun Kim),김가희(Ga Hee Kim) 위기관리 이론과 실천 2018 Crisisonomy Vol.14 No.2
본 연구는 해외 화학사고 예방관리제도 실태 분석을 통해 효과적⋅효율적 화학사고 예방관리를 위한 개선방안을 도출하는데 목적을 두고 진행하였다. 분석결과를 고려할 때, 향후 선진화된 화학사고 예방관리를 위해서는 첫째, 우리나라의 경우 산업안전보건법의 공정안전보고서와 화학물질관리법의 위해관리계획서 및 장외영향평가서가 보고내용의 구성 및 분류 항목의 중복이 다수 발생하고 있다. 따라서 각 제도에서 요구하는 자료 및 내용에 대한 특성 및 중복성에 대한 조사⋅검토가 필요 하다. 둘째, 우리나라 화학사고 예방관리제도도 미국의 방식처럼 RMP와 PSM을 통합양식으로 변경 하여 사업장차원에서는 한 번에 제출을 함으로써 업무의 중복과 이로 인한 비용의 절감효과를 가져올 수 있고, 환경부와 고용부에서 각각 필요한 부분만을 심사하는 것이 보다 효과적이라고 할 수있다. 셋째, 예방관리 문서화는 위험물질의 규정수량에만 너무 의존하지 말고, 위험의 발생가능성을 적극적으로 고려하여, 위험성평가와 대응프로그램을 강화하여 주민들의 화학사고 예방 노력이 더적극적으로 이루어져야 한다. The purpose of this research is to suggest alternatives and measures to develop an advanced management plan for chemical accident prevention and management. In Korea, there is substantial redundancy in contents and classification items among the Process Safety Report of Occupational Safety and Health Acts, risk management plans and outside effect evaluation of the Chemical Control Act. Thus, the chemical accident prevention system in Korea should be revised to integrate the forms of RMP and PSM, following the US system. Such alternation can reduce work redundancy and cost as it requires only one-time submission of the documents. it should allow the Ministry of Environment and Ministry of Employment to function more effectively because it can evaluate only the necessary parts.
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