Dynamic safety analysis of process systems with an application to a cryogenic ammonia storage tank

Aneziris, ON; Papazoglou, IA; Lygerou, V

dc.contributor.author	Aneziris, ON	en
dc.contributor.author	Papazoglou, IA	en
dc.contributor.author	Lygerou, V	en
dc.date.accessioned	2014-03-01T01:15:33Z
dc.date.available	2014-03-01T01:15:33Z
dc.date.issued	2000	en
dc.identifier.issn	0950-4230	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13589
dc.subject	dynamic reliability	en
dc.subject	ammonia storage	en
dc.subject	Markovian analysis	en
dc.subject	risk assessment	en
dc.subject	dynamic safety	en
dc.subject	quantified risk assessment	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	RELIABILITY-ANALYSIS	en
dc.subject.other	DYLAM APPROACH	en
dc.title	Dynamic safety analysis of process systems with an application to a cryogenic ammonia storage tank	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0950-4230(99)00060-1	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0950-4230(99)00060-1	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	A method for calculating the dynamic reliability of safety systems and its application to a refrigerated liquid cryogenic ammonia storage tank is presented. The method is based on the theory of Markov chains and can model dynamic phenomena of the process and its safety systems. It offers the capability of modelling realistically the competing process of repairing failed safety systems and the exceeding of safe limits by some critical physical parameters of the process. The results of the Markovian analysis are compared to those of the classical Fault Tree/Event Tree methods and it is shown that the proposed method offers a substantial improvement over the classical approach. The probability of failure from overpressure of a cryogenic ammonia storage tank depends in general on the level of the ammonia in the tank at the time of accident initiation. Assuming a uniform distribution for the ammonia level in the tank, the average upper and lower limits for the failure probability over a year provided by the FT/ET methods span three orders of magnitude [1.4x10(-1)-1.0x10(-4)] depending on whether repair is considered or not. The proposed approach realistically determines this failure probability at 3.3x10(-3). Additional results from specific levels of ammonia are also provided. (C) 2000 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES	en
dc.identifier.doi	10.1016/S0950-4230(99)00060-1	en
dc.identifier.isi	ISI:000085386200006	en
dc.identifier.volume	13	en
dc.identifier.issue	2	en
dc.identifier.spage	153	en
dc.identifier.epage	165	en