TRAC ANALYSIS OF DESIGN BASIS EVENTS FOR THE ACCELERATOR PRODUCTION OF TRITIUM TARGET/BLANKET

摘要

A two-loop primary cooling system, in combination with a residual heat removal system, was designed to remove the heat generated in the tungsten neutron source rods inside the rungs of the target ladders and the shell of the rungs. The Transient Reactor Analysis Code (TRAC) was used to analyze the thermal-hydraulic behavior of the primary cooling system during a pump coastdown transient; a cold-leg, large-break (LB) loss-of-coolant accident (LOCA); a hot-leg LBLOCA; and a target downcomer LBLOCA. The TRAC analysis results showed that the heat generated in the tungsten neutron source rods can be removed by the primary cooling system for the pump coastdown transient and all of the LBLOCAs except the target downcomer LBLOCA. For the target downcomer LBLOCA, a cavity flood system is required to fill the cavity with water at a level above the large fixed headers.