Neutronics characterization of an erbia fully poisoned PWR assembly by means of the APOLLO2 code

Open Access

Table 12

Moderator temperature coefficient.

Configuration	Phase	T_mod [°C]	ΔT	k_inf [pcm]	a_Mod [pcm/°C] @ BU = 0
²³⁵U = 10.27 wt.% and Er = 1 at.%	Initial	314	10	1.323998	−19.473
	Final	324	10	1.320593	−19.473
	Initial	314	20	1.323998	−20.406
	Final	334	20	1.316882	−20.406
	Initial	314	50	1.323998	−22.812
	Final	364	50	1.304301	−22.812
	Initial	314	−10	1.323998	19.116
	Final	304	−10	1.327357	19.116
	Initial	314	−20	1.323998	18.238
	Final	294	−20	1.330423	18.238
	Initial	314	−50	1.323998	16.336
	Final	264	−50	1.338473	16.336


²³⁵U = 5 wt.% and Er = 0 at.%	Initial	314	50	1.324021	−12.172
	Final	364	50	1.313438	−12.172
	Initial	314	−10	1.324021	8.192
	Final	304	−10	1.325459	8.192
	Initial	314	−50	1.324021	6.040
	Final	264	−50	1.329337	6.040


²³⁵U = 10.27 wt.% and Er = 0 at.%	Initial	314	50	1.451792	−15.523
	Final	364	50	1.435615	−15.523
	Initial	314	−50	1.451792	10.038
	Final	264	−50	1.462448	10.038

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