| Abstract: | For the design of severe accident resistant reactor containments estimates are needed for limiting dynamic loads from hydrogen combustion processes. This paper presents some first exploratory results.The approach for a systematic study of dynamic loads from large scale hydrogen detonations is described. The parameter range of H2-steam-air detonations is defined and then narrowed down to the region which seems accessible in severe reactor accidents. Maximum possible hydrogen masses, unfavorable hydrogen distributions and limiting detonation cases are discussed. The effect of gas composition, geometry, and scale on detonation pressurs and impulses was investigated with one-dimensional calculations. An accident scenario which combines many conservative parameters was analyzed. The one-dimensional modeling, which contains a high degree of conservatism, resulted in 10.5 MPa peak pressure and 60 kPa s reflected impulse (at 30 ms) over approx. 1400 m2 containment surface. |
