The purpose of the 600 MW(e) advanced PWR reactor NPP simulator is educational — to provide a training tool for university professors And engineers involved in teaching topics related to the advanced passive PWR reactor. Nuclear engineers, scientists And trainers familiar with the conventional PWR would find this simulator useful in broadening their understAnding of the advanced PWR characteristics, transients, power plant dynamics, And passive safety features. As such, this simulator is currently used in the IAEA Workshop "NPP Simulators for Education".
The simulator has sufficient simulation fidelity to provide realistic PWR plant responses during normal operations And accident situations. More importantly, Mode K Reactor Control Strategy is simulated in details, which allows double closed loop control of (1) reactor coolant temp (2) axial power difference, with the use of:
Heavy-worth control rods bank dedicated to axial shape control.
Light-worth control rods bank for controlling coolant temp at setpoint.
Auto regulation of both the reactivity And power distribution - permits load-follow operations (frequency control) to respond to grid conditions, with minimum use of Boron.
The PWR simulator also has a user-machine interface that mimics the actual control panel instrumentation. More importantly, it allows user’s interactions with the simulator during the operation of the simulated PWR plant.
The current configuration of the Simulator is able to respond to the operating conditions normally encountered in power plant operations, as well as to many malfunctions, as summarized in the following Table.
System
Simulation Scope
Display Pages
Operator Controls
Malfunctions
REACTOR
CORE
* Neutron flux levels over a range of 0.001 to 110% full power, 6 delayed neutron groups * Decay heat (3 groups)
* All reactivity control devices - “dark” rods; “gray” rods; boron control.
* Xenon/Iodine poison
* Reactor power control system
* Reactor shutdown system
PWR Reactor Power control
PWR Control Rods & SD rods
PWR Trip parameters
* Reactor power And rate of change (input to control computer)
* Manual control of reactivity devices - control rods And boron addition/removal
* Reactor trip
* Reactor setback
* Reactor stepback
* Reactor setback And stepback fail * One bank of Dark control rods drop into the reactor core
REACTOR COOLANT
* Main circuit coolant loop with four pumps, two steam generators, four equivalent “lumped” reactor coolant channels * Pressure And inventory control which includes pressurizer, coolant letdown condenser, charge & letdown control, And pressure relief
* Operating range is from zero power hot to full power
* Fully dynamic interaction between all simulated systems * Overall unit power control with reactor leading mode; or turbine leading mode
* Unit annunciation & time trends
* Computer control of all major system functions
PWR Plant Overview
PWR Control Loops
PWR MW DemAnd SP & SGPC
* Reactor power setpoint And rate entry in reactor-lead mode. * Turbine load setpoint (MW) And loading rate entry in turbine-lead mode
SAFETY SYSTEM
* Emergency Core Cooling System (ECC) * Simple Model for containment.
PWR Passive Core Cooling
Reactor inlet header break
The interaction between the user And the simulator is via a combination of monitor displays, mouse And keyboard. Parameter monitoring And plant operator controls, implemented via the plant display system at the generating station ,are rEPResented in a virtually identical manner on the simulator. Control panel instruments And control devices, such as push-buttons And hAnd-switches, are shown as stylized pictures, And are operated via special pop-up menus And dialog boxes in response to user inputs.
|Archiver|手机版|小黑屋|核电论坛
( 京ICP备20002920号-3 )
发表于 2010-9-13 14:44:10
