A Critical Review of the Recent Improvements in Minimizing Nuclear Waste by Innovative Gas-Cooled Reactors

Table 9

Summary of the obtained results.

	HTR (513 EFPD)	GCFR (4950 EFPD)	Symbiotic cycle^∗
LOMBT [years]	63^·682 (waste = FP+HM)	159 (waste = FP^∗ ∗)	159 (waste = FP^∗ ∗)
Np^237out/Np^237in	66%	27%	18%
Pu^238out/Pu^238in	165%	75%	123%
Pu^239out/Pu^239in	81%	306%	248%
Pu^240out/Pu^240in	77%	73%	56%
Pu^241out/Pu^241in	80%	26%	20%
Pu^242out/Pu^242in	170%	72%	122%
Am^241out/Am^241in	21%	243%	51%
Am^243out/Am^243in	126%	83%	104%
Cm^244out/Cm^244in	412%	102%	420%

^∗ In this case, there is no indication about EFPD because the real cycle is made of burnup days inside the reactors plus days out-of-pile (mainly due to recycling times).
^{∗ ∗} The fission products considered here are the following: Rb⁸⁷, Sr⁹⁰, Zr⁹³, Nb⁹⁴, Tc⁹⁹, Pd¹⁰⁷, Sn¹²⁶, I¹²⁹, Cs¹³⁵, Cs¹³⁷, Sm¹⁴⁷, Sm¹⁵¹, and Eu¹⁵⁴.