Ultra-High Temperature Reactor Experiment (UHTREX) Transients

摘要

Three types of transients in the UHTREX reactor have been numerically evaluated. They are (1) withdrawal of one plug rod at the design speed of 18 in./min starting from near zero power, (2) withdrawal of one plug rod at 18 in./min starting from 3 MW delayed critical, and (3) scrams from 3 MW delayed critical. None of these transients would result in serious damage to the reactor, although in case 2 fuel particle melting occurs if a power scram does not terminate the excursion. Also, stressing of the fuel elements may be significant in case 1.