Siting Bulk Hydrogen Storage Systems: Advances in Risk-Informed Siting Procedures in NFPA Codes

摘要

From 2007-2009, the NFPA 55 Industrial and Medical Gas Technical Committee and the NFPA 2 Hydrogen Technology Technical Committee developed revised separation distances for the bulk gaseous hydrogen storage systems based on an analytical process that integrated both Computational Fluid Dynamic (CFD) modeling to evaluate the consequences of hydrogen releases and probabilistic risk analysis to include the frequency of hydrogen releases, the harm criteria associated with these releases, and the acceptable risk level for the separation distances calculated as a function of these inputs. An NFPA 55 and 2 joint Hydrogen Task Group was formed in 2014 to accomplish the following tasks: -Develop revised separation distances for bulk liquefied hydrogen storage based on a risk-informed methodology parallel to the process used in the previous update of the gaseous requirements. -Evaluate hydrogen system safety measures for both gaseous and liquefied hydrogen storage and develop a system for separation distance reduction based on additional layers of safety or new safety measures. -Evaluate the risk criteria used to develop the separation distances for bulk gaseous hydrogen storage and make recommendations for changes in these distances based on the revised criteria. This paper summarizes this work including the risk-informed process for developing separation distances for bulk liquefied hydrogen storage which has not previously been addressed in NFPA codes.