01798nab a2200229 4500 20260520004608.0 260224s2018 xxu ing Inglés Hydrogen jet vapor cloud explosion : A model for predicting blast size and application to risk assessment sept. 2018 04/11/2020 ; 04/11/2020 14 p. ; 397-410 Releases of hydrogen at elevated pressures form turbulent jets in unconfined & uncongested regions may trigger vapor cloud explosion (VCE) as well as jet fire hazards. In the case of a delayed ignition of an unconfined & uncongested jet the turbulence induced by the jet release can lead to flame speeds sufficient to produce damaging blast loads, even in the absence of confinement or congestion. The VCE hazard posed by such high-pressure hydrogen releases is not well-recognized. The authors have previously presented test data and computational fluid dynamic (CFD) modeling analyses which characterize high pressure hydrogen releases and the associated VCE hazard in unconfined & uncongested regions. The current paper provides an overview of this VCE hazard. It presents both CFD simulations and a new simplified method. The new method determines the blast strength based on a blast curve method (i.e., TNO multienergy or BST) with the strength index correlated to the mass flow rate of the accidental release. The paper discusses also the implications of such events for building siting analyses and risk assessments. 3 Process safety progress ARTICULO Jallais, Simon 59752 Vyazmina, Elena 59751 Miller, Derek 57278 Thomas, Kelly 59838 193703 193703 0 0 0 0 261422 BAAB BAAB 2026-03-06 200066068 0 200066068 2026-03-06 00:38:40 2026-03-06 ARTICULO