Analysis of Control Rod Drop Accidents for the Canadian SCWR Using Coupled 3-Dimensional Neutron Kinetics and Thermal Hydraulics

Table 7

Parametric study on the CRDA of control rod 15 at BOC.

CR15 at BOC	Time step (s)	Scram signal (% FP)	Scram delay (s)	Drop time (s)	Max relative power	MCST (K)	MFCLT (K)
Case : reference	0.02	115	0.6	0.8	1.332	1148.7	2535.6
Case : time step decrease	0.005	115	0.6	0.8	1.331	1147.6	2533.1
Case : scram signal	0.02	120	0.6	0.8	1.332	1152.4	2544.4
Case : scram delay	0.02	115	1.2	0.8	1.332	1173.2	2587.5
Case : drop time	0.02	115	0.6	0.4	1.3893	1148.4	2540.1
Case : time step increase	0.1	115	0.6	0.8	1.344	1149.3	2536.2