Overview and Discussion of the OECD/NRC Benchmark Based on NUPEC PWR Subchannel and Bundle Tests

Table 9

Accuracy of process parameters in void distribution measurement.

Quantity	Accuracy
Process parameters
Pressure	1%
Flow	1.5%
Power	1%
Fluid temperature	1 Celsius
Void fraction measurement
CT measurement
Gamma-ray beam width	1 mm
Subchannel averaged (steady state)	3% void
Spatial resolution of one pixel	0.5 mm
Chordal measurement
Gamma-ray beam width (center)	3 mm
Gamma-ray beam width (side)	2 mm
Subchannel averaged (steady state)	4% void
Subchannel averaged (transient)	5% void