Science and Technology of Nuclear Installations

Research Article

The Verification of Coupled Neutronics Thermal-Hydraulics Code NODAL3 in the PWR Rod Ejection Benchmark

Table 3

Maximum deviations of DYN3D/R and NODAL3 compared to the reference solution in 1993 [26].
ParameterMaximum deviation (%)
Critical boron concentration, ppm 
 DYN3D/R0.86
 NODAL3 (adiabatic)0.85
 NODAL3 (quasistatic)0.85
Time of power peak, s 
 DYN3D/R12.50
 NODAL3 (adiabatic)5.00
 NODAL3 (quasistatic)3.39
Power peak 
 DYN3D/R20.32
 NODAL3 (adiabatic)11.89
 NODAL3 (quasistatic)9.43
Final power (at 5 s) 
 DYN3D/R4.65
 NODAL3 (adiabatic)3.13
 NODAL3 (quasistatic)3.13
Final average Doppler temperature (at 5 s), °C 
 DYN3D/R1.29
 NODAL3 (adiabatic)0.32
 NODAL3 (quasistatic)0.35
Maximum fuel temperature (at 5 s), °C 
 DYN3D/R3.53
 NODAL3 (adiabatic)2.56
 NODAL3 (quasistatic)2.56
Final coolant outlet temperature (at 5 s), °C 
 DYN3D/R0.24
 NODAL3 (adiabatic)5.32
 NODAL3 (quasistatic)5.32