Simulations of Darlington Shutdown Cooling System
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Abstract
The Shutdown Gaoling (SDC) System, an integral part of the Darlington Nuclear Reactor System, is used primarily to cool the reactor core and the Heat Transport System following a normal reactor shutdown and an initial cooldown by steam discharge from the steam generators. The heat removal function of the SDC system is achieved with one or both SDC heat exchangers. A model for the SDC heat exchanger is derived from its heat transfer characteristic. A SDC system model, which consists of the heat exchanger model and a SDC pump model, is developed. The transient characteristic of the HT system and the SDC system during a nod reactor cooldown is simulated with the SOPHT computer code using the SIX system model coupled with a HT system model. This study demonstrates the effectiveness of system thermalhydraulic computer simulations for assessing the design capability of process systems in nuclear generating stations.
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