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OS1C-8：RISK ASSESSMENT FOR A CONCEPTUAL DESIGN OF A NATURAL GAS HYDRATE TRANSPORT VESSEL
发布时间:2014-07-28
Hokeun KANG 1, Youtaek KIM 1, Kipyoung KIM 2, Daeheon KIM 2, Taebum HA 2
1. Division of Marine System Engineering, Korea Maritime and Ocean Universit, KOREA; 2. New Growth Research Division, Korean Register of Shipping, KOREA
There are many possible technologies of transporting gas from production fields to consumer elsewhere as a fuel or as a chemical feedstock in a petrochemical plant, where gas is converted into valuable products. The natural gas transportation, gas to hydrate (NGH), has been investigated within the Korean joint research project consortium.
When developing new technologies nowadays the safety aspect is an important factor in evaluation and approval process considering both human safety and environmental safety. Therefore this work was to support and assess the development under risk aspects to ensure that the risk level for the newly developed concept is as low as for existing competing concepts, especially LNG carrier.
The NGH carrier is based on the concept of the self-preservation effect and thereby preserves NGH in the form of pellets at the atmospheric pressure of lower than -20 degree Celsius. In order to identify all the possible hazards in the system and then enhance the system safety, a Hazard Identification (HAZID) study was conducted. As a result of the HAZID, 80 hazards in total were explored and ranked in terms of risk index for the semi-quantitative risk evaluation. Among the hazards identified, three hazards were found to have unacceptable risk level and twenty eight to have acceptable but ALARP risk level. Regarding the hazards with unacceptable risk or ALARP risk, additional safety actions and recommendations for risk control were discussed and proposed in SAFETY ACTION REGISTER, which would be considered and utilized by designers when developing the detailed system design in the future.
1. Division of Marine System Engineering, Korea Maritime and Ocean Universit, KOREA; 2. New Growth Research Division, Korean Register of Shipping, KOREA
There are many possible technologies of transporting gas from production fields to consumer elsewhere as a fuel or as a chemical feedstock in a petrochemical plant, where gas is converted into valuable products. The natural gas transportation, gas to hydrate (NGH), has been investigated within the Korean joint research project consortium.
When developing new technologies nowadays the safety aspect is an important factor in evaluation and approval process considering both human safety and environmental safety. Therefore this work was to support and assess the development under risk aspects to ensure that the risk level for the newly developed concept is as low as for existing competing concepts, especially LNG carrier.
The NGH carrier is based on the concept of the self-preservation effect and thereby preserves NGH in the form of pellets at the atmospheric pressure of lower than -20 degree Celsius. In order to identify all the possible hazards in the system and then enhance the system safety, a Hazard Identification (HAZID) study was conducted. As a result of the HAZID, 80 hazards in total were explored and ranked in terms of risk index for the semi-quantitative risk evaluation. Among the hazards identified, three hazards were found to have unacceptable risk level and twenty eight to have acceptable but ALARP risk level. Regarding the hazards with unacceptable risk or ALARP risk, additional safety actions and recommendations for risk control were discussed and proposed in SAFETY ACTION REGISTER, which would be considered and utilized by designers when developing the detailed system design in the future.
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