Sensitivity Evaluation of AP1000 Nuclear Power Plant Best Estimation Model

Table 1

The influence of core channel node number on the coolant temperature variation.

Node number	Reactor inlet temperature (K)	Reactor outlet temperature (K)	Calculated temperature variation (K)	Designed temperature variation (K)	Fractional error
5	554.516	593.6928	39.1768	40.4	3.03%
10	554.3637	594.7499	40.3862	40.4	0.03%
15	554.2802	595.3843	41.1041	40.4	1.74%
20	554.1759	596.17845	42.00255	40.4	3.97%
30	553.95	597.64	43.69	40.4	8.14%
40	553.8906	598.1865	44.2959	40.4	9.64%
50	553.8235	598.3517	44.5282	40.4	10.22%