Modelling and Validation of CANDU Shim Operation Using Coupled TRACE/PARCS with Regulating System Response

Table 2

Comparison of station data and simulations on zone level figures of merit. Uncertainties are stated as one standard deviation.

Case	Average zone level (4 + 11 only) (%) 5 minutes before end of station data	Average zone level (%) 105 minutes after 59% FP
Station	65.6	n/a
0 EFPH	19.0	41.4
154008 EFPH	42.3	24.7
182500 EFPH (ref.)	47.0	21.9
195000 EFPH	49.2	20.6
90% LZC weight	52.1	21.4
12 plane nodalisation	42.1	28.8
26 plane nodalisation	44.9	24.6
Nuclear data unc	47.0 ± 15.2	22.3 ± 2.6
No refuel reference	46.9	21.7
Burnup distribution unc	n/a	21.4 ± 1.0
Burnup + data unc	n/a	21.8 ± 3.4

The bolded rows denote the real world results as well as corresponding best-estimate simulations; the nonbolded rows are sensitivity cases.