Title: Assessment of Lightning Impact Frequency for Process Equipment
Authors: NECCI AANTONIONI GiacomoCOZZANI ValerioKRAUSMANN ElisabethBORGHETTI AlbertoNUCCI Carlo Alberto
Citation: RELIABILITY ENGINEERING \& SYSTEM SAFETY vol. 130 p. 30-46
Publisher: ELSEVIER SCI LTD
Publication Year: 2014
JRC N°: JRC90077
ISSN: 0951-8320
URI: http://www.sciencedirect.com/science/article/pii/S0951832014000428
http://publications.jrc.ec.europa.eu/repository/handle/JRC90077
DOI: 10.1016/j.ress.2014.02.005
Type: Articles in periodicals and books
Abstract: Fires and explosions triggered by lightning strikes are among the most frequent Natech scenarios affecting the chemical and process industry. Although the lightning hazard is well known, well accepted quantitative procedures to assess the contribution of accidents caused by lightning to industrial risk are still lacking. In the present study, a quantitative methodology for the assessment of the expected frequency of lightning capture by process equipment is presented. A specific model, based on Monte Carlo simulations, was developed to assess the capture frequency of lightning for equipment with a given geometry. The model allows the assessment of lay-out effects and the reduction of the capture probability due to the presence of other structures or equipment items. The results of the Monte Carlo simulations were also used to develop a simplified cell method allowing a straightforward assessment of the lightning impact probability in a quantitative risk assessment framework. The developed approach allows an in-depth analysis of the hazard due to lightning impact by identifying equipment items with the highest expected frequency of lightning impacts in a given lay-out. The model thus supplies useful data to approach the assessment of the quantitative contribution of lightning-triggered accidents to industrial risk.
JRC Directorate:Space, Security and Migration

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