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Each NPM is installed below-grade in a seismically robust, steel-lined, concrete pool
NPMs can be incrementally added to match load growth—up to 12 NPMs for 600 MWe gross (~570 net) total output
A NuScale Power Module (NPM) includes the reactor vessel, steam generators, pressurizer and containment in an integral package that eliminates reactor coolant pumps and large bore piping (no LBLOCA)
Each NPM is 50 MWe and factory-built for easy transport and installation
Each NPM has its own skid-mounted steam turbine-generator and condenser
Unique NuScale Design Features Differences Unique differences that impact I&C System Design
Natural circulation as a function of power level ‒ Testing during changing flow conditions between
shutdown and power operations. most of the reactor module is under water during normal
operation and during most of the refueling evolution containment is flooded during refueling vacuum conditions in containment during normal operation volume of containment is significantly smaller than typical
PWR containment no reactor coolant system piping higher containment temperatures during normal operation
and higher containment design-basis event (DBE) temperatures and pressures
higher containment radiation levels during normal operation and higher containment DBE radiation levels
Module Protection System (MPS) – major focus of NRC review ‒ All Phase 1 RAIs have been completed ‒ Instrumentation and Controls based on NuScale Highly Integrated Protection
System Platform which received NRC Approval on June 6, 2017. ‒ Advanced Sensor Technical Report (TR-0316-22048) describes NuScale
Sensor Technology for Pressure, Temperature, Flow, Level
Module/Plant Control Systems (MCS/PCS) ‒ Common Cause Failures - Segmentation Analysis ‒ Safety classification of control room habitability systems ‒ Post-accident monitoring functions ‒ Interface between protection and control (control of safety-related
Module Protection System Prototype completed in 2017 RPV Prototype and Flow Sensor testing completed in 2017
‒ In Development Safety Display and Indication System Prototype Prototype Sensors for Key Process Variables: Pressure, Level, Flow, In-core
Neutron Detectors
Testing and qualification of sensor applications in unique environments ‒ In situ calibration and testing ‒ Testing during refueling (module movement) ‒ Replacement, repair and maintenance
Managing evolving cyber security threats ‒ Data storms, insider threats, secure development and operating
Portland Office 6650 SW Redwood Lane, Suite 210 Portland, OR 97224 971.371.1592 Corvallis Office 1100 NE Circle Blvd., Suite 200 Corvallis, OR 97330 541.360.0500 Rockville Office 11333 Woodglen Ave., Suite 205 Rockville, MD 20852 301.770.0472 Charlotte Office 2815 Coliseum Centre Drive, Suite 230 Charlotte, NC 28217 980.349.4804
Richland Office 1933 Jadwin Ave., Suite 130 Richland, WA 99354 541.360.0500 Arlington Office 2300 Clarendon Blvd., Suite 1110 Arlington, VA 22201 London Office 1st Floor Portland House Bressenden Place London SW1E 5BH United Kingdom +44 (0) 2079 321700