TWO AND THREE-DIMENSIONAL MODEL BASED CORRECTION OF ELBOW TAP FLOW MEASUREMENT

摘要

A system for determining coolant flow rate in a nuclear reactor primary cooling loop includes a processor and a memory. The memory stores physical measurements of the mechanical components comprising the primary cooling loop. The memory also stores instructions that cause the processor to: receive pressure data from a plurality of pressure sensors in the cooling loop; calculate a model of fluid flow through the primary cooling loop based on the mechanical component measurements; compare the data from the pressure sensors with estimated data from the fluid flow model; and calculate a statistical weighting of the pressure data from the pressure sensors based on the estimated pressure data from the fluid flow model. In another system, the flow rate is determined from a combination of the estimate from the modeled fluid flow with an estimate based on a calorimetric thermal exchange calculation.