TRANSACTIONS OF THE 4TH International Conference on STRUCTURAL MECHANICS IN REACTOR TECHNOLOGY San Francisco, California, USA 15-19 August 1977

摘要

The analysis of the dry well structure in the G. E. Mark III containment system is pre¬sented and the loadings and solution techniques are discussed in this paper.nThe drywell structure is a reinforced concrete cylindrical shell. In the bottom region of the shell, there are many 28 inch diameter horizontal vents arranged in a regular pat* tern. The main function of the drywell is lo channel steam released during a main steam line break through the horizontal vents for rapid condensation in the suppression pool and to reduce radiation levels in the containment to permit normal access.nThe drywell is designed to sustain all operating loads, thermal loads, seismic loads and accident toads. Dynamic loads are applied to the structure statically with dynamic load factors obtained front separate analysis. Seismic loads are applied as equivalent static loads obtained from seismic analysis of lumped-mass model of the structure. The design re¬quires the various combination of dead and live loads, accident pressure loads, thermal effects under operating and accident conditions, safe shutdown and operating basis earth¬quakes, steam relief valve blow down loads, poolswell loads, and jet force and pips whip loads due to pipe rupture The loading combinations are presented in a detailed tabulated form.