Conceptual Engineering of CARA Fuel Element with Negative Void Coefficient for Atucha II

Table 1

Validation results on the effective multiplication factor.

Core*	WIMSD-5–CITATION		MCNP^KAERI [8]		WIMS-ATR–CIT^KAERI [8]
	With coolant	100% Void	With coolant	100% Void	With coolant	100% Void
1.2% U (97)	1.00394	0.99910	0.99851	0.99712	0.99627	0.99739
5Spu (25)	1.00274	0.99865	0.99432	0.99345	0.99383	0.99508
8Spu (25)	1.00236	0.99832	0.99635	0.99530	0.99317	0.99563
0.7% U (25)	0.99646	0.99215	1.00070	0.99959	0.99827	1.00203
1.5% U (13)	1.00205	0.99832	1.00041	0.99875	0.99635	1.00933
Average	1.00151	0.99730	0.99806	0.99684	0.99558	0.99989
St. Dev. (pcm)	350		250		480

*The core description corresponds to that in reference [6].