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HEAT EXCHANGER TEMPERATURE RESPONSE FOR DUTY-CYCLE TRANSIENTS IN THE NGNP/HTE
Heat exchanger temperature response
for duty-cycle transients in the NGNP/HTE
Richard Vilim
Argonne National Laboratory, USA
Abstract
Control system studies were performed for the next generation nuclear plant (NGNP) interfaced to the
high-temperature electrolysis (HTE) plant. Temperature change and associated thermal stresses are
important factors in determining plant lifetime. In the NGNP the design objective of a 40-year lifetime
for the intermediate heat exchanger (IHX) in particular is seen as a challenge. A control system was
designed to minimise temperature changes in the IHX and more generally at all high-temperature
locations in the plant for duty-cycle transients. In the NGNP this includes structures at the reactor
outlet and at the inlet to the turbine.
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