Implementation of a RELAP5 RCS and Secondary Plant Model in a Nuclear Power Plant Training Simulator

摘要

The Comanche Peak Steam Electric Station (CPSES) consists of two 4-loop Westinghouse Pressurized Water Reactor (PWR) nuclear power plants. The plant operates a single Control Room Simulator for NRC licensed operator training with the reference unit for the simulator being CPSES Unit 1. In the mid-90s, CPSES replaced the RCS thermal-hydraulics model in the simulator with a RELAP model using a realtime version of RELAP5 Mod 3.1 provided by Data Systems & Solutions (then SAIC). Based on the experience with the RCSmodel, CPSES decided to extend the RELAP model to include much of the secondary plant. This extended model uses the latest release of the real-time version of RELAP, RELAP5-RT, based on the RELAP5 Mod 3.2 code version. The RELAP5 plant model includes all four individual RCS loops, the reactor vessel, all steam generators and main steam lines, as well as the entire feedwater, condensate and heater drain systems. This paper, describes some of the challenges overcome in order to successfully apply the RELAP code to realtime simulation for nuclear training. The paper also describes the advantages of using a code such as RELAP for licensed operator training and some of the benchmarking of the model to plant data.