Hydrogen detonation

The heat sensitivity (above) may explain the explosions which occur on contact of many readily oxidisable materials with this powerful oxidant. Such materials include ammonia, potassium arsenic, antimony sulfur, charcoal (adsorptive heating may also contribute) calcium phosphide, phosphine, phosphorus hydrogen sulfide, antimony sulfide, barium sulfide, mercury sulfide and tin sulfide [1], Various organic materials (paper, cork, rubber, turpentine, etc.) behave similarly [2]. Mixtures with hydrogen detonate on ignition [1]. 

SAWYERS, D JAHN, W., REHM, W., Hydrogen Detonation Calculations Using the Numerical Code DET2D, Internal Report KFA-ISR-IB-17/93, Research Center Julich (1993). 

A super-strong pressure containment, passively cooled in order to sustain without failure slow over-pressurizations, hydrogen detonations and over-pressurizations from direct containment heating (DCH). 

A directly-initiated hydrogen detonation in the APIOOO containment is not a credible event. 

They result in the lowest risk for hydrogen detonation, whieh might possibly result in a release of radioactivity from the contaimnent. 

Hydrogen detonation has become an important issue after the Three-Mile-Island accident. The hydrogen burning occurred approximately 10 hours into the accident. The steam reacting with the Zircaloy cladding and the oxidation of the overheated steel vessel interiors created large quantities of hydrogen. This can also occur due to interaction of the molten core. In order to predict the wall pressures due to such detonations, non-linear gas dynamics equations for the entire volume of the containment vessel have to be solved. In the current analysis of the Sizewell B containment vessel, it is assumed that the wall pressure... 

M. A. Delichatsios, M. B. Genadry, M. N. Fardis, Calculations of Hydrogen Detonations in Nuclear Containments bv the Random Choice Method. M.I.T., R81-30, December 1981. 

Hydrogen detonation within containment does not occur if hydrogen combustion occurs, the pressure stays below the design pressure. As a sufficient condition, one can require that the concentration of hydrogen... 

A. Teodorczyk, Initiation of hydrogen detonation. 2nd European Summer school on hydrogen safety, Belfast, 2007... 

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