A Study on the Safety Assessment of Alternative Safety Devices Replacing Liquid Seal in Ship Vapor Recovery Unit

선박 유증기 회수설비의 Liquid Seal 대체 안전설비 안전성 평가 방안에 대한 연구

By 33 CFR 154.828 regulation, a liquid seal must be installed on the inlet to vapor destruction unit in vapor control system. However, install and maintenance of liquid seal are subject to many problems in ship environment. Therefore, US Coastguard, which is the governing body of the regulation, have prepared another clause in the regulation for the exemption from previous clauses. In this paper, relevent regulation is reviewed, together with the requirements for exemption from liquid seal installation. A previous example case is also studied to propose how safety assessment for the alternative safety devices replacing liquid seal should be performed.