MONTHLY PROGRESS REPORT FOR AUGUST 1975 HTGR SAFETY STUDIES FOR THE DIVISION OF TECHNICAL REVIEW U.S. NUCLEAR REGULATORY COMMISSION

摘要

The major work during this period has been the continued develop-ment of the coupling between the multichannel, conduction-convection computer program, HEXEREI, and the core auxiliary cooling system per-formance code, ACHERONS. This has involved refinement and incorpo¬ration of the computer program, FLODIS, which determines the amount of coolant flowing in each refueling region at reduced flow conditions.nOther work includes transmitting the single-channel, coupled con-duction-convection model (CCCM) with appropriate documentation to the Division of Technical Review for their use, and completing the documen-tation of the 3-dimensional adiabatic loss of forced convective cooling calculation (HEATUP) that includes the relationship between fuel age and fuel temperature. Two reports, one on the thermal properties of helium-air mixtures and the other on performance calculations for the core auxiliary heat exchanger, are in the process of review and re¬production.