CSQ calculations of H2 detonations in the Zion and Sequoyah nuclear plants

This report presents results from eleven calculations concerning the detonation of a dry hydrogen:air mixture in various models of nuclear reactor containment structures. One calculation treats a large, dry containment (Zion); the remaining analyses consider separate portions of an ice condenser containment (Sequoyah). The calculations were carried out with a well-tested, two-dimensional continuum mechanics code, using a simplified model that forces detonation to occur. All problem boundaries were treated as rigid - that is, no attempt was made to characterize the response of the structures to the loads imposed on them