The results of a dynamic analysis of the LOFT Reactor Core Barrel for faulted conditions are presented in this report. Loading conditions considered were seismic accelerations resulting from a Safe Shutdown Earthquake (SSE) and pressure loadings from both a hot leg and a cold leg Loss-of-Coolant Accident (LOCA) break. Maximum stresses in the core barrel, resulting from these conditions, are presented with comparisons to Code allowables. Stresses were found to be within allowables for the faulted condition as defined in the ASME Code (1977), Appendix F.

A faulted analysis of the LOFT Reactor Vessel filler blocks has been completed. The faulted loads were the sum of LOCA (Loss of Coolant Accident) plus SSE (Safe Shutdown Earthquake). The analysis showed the filler blocks to be structurally adequate for the faulted loading.

The LOFT Reactor Lower Core Support Plate has been analyzed using LOCA plus SSE loading. The LOCA loading was obtained from LTR 1115-39, Ref. 1, which used LOCA pressures from Ref. 5. SSE loading on the Lower Core Support Plate was obtained from LTR 1115-31, Ref. 2. The combination of LOCA plus SSE is considered a faulted loading condition. The analysis showed the lower Core Support Plate to be structurally adequate and that it meets all of the ASME Section III requirements for faulted conditions. A listing of the computer code used in this analysis is contained in Appendix B. 10 figs.