Compositions – Radioactive compositions – Nuclear reactor fuel
Patent
1991-09-18
1993-10-05
Walsh, Donald P.
Compositions
Radioactive compositions
Nuclear reactor fuel
376184, 376189, 376339, 376419, 2041572, 20415722, 420416, 423 211, 423263, 95 34, 95 43, G21C 300, G21F 900, C01F 100, C01F 1700
Patent
active
052502317
ABSTRACT:
By using AVLIS or other methods capable of providing a depleted isotopic mixture, troublesome isotopes such as Gd.sup.154, Gd.sup.156 and Er.sup.166 are selectively removed from naturally occurring isotopic mixtures, while avoiding the additional costs associated with complete fractionation of the mixture. Such mixtures can be used to provide a burnable nuclear fuel absorber having a selectively depleted isotope or isotopes. In particular, the invention concerns burnable absorbers containing erbium with a depleted 166 isotope, gadolinium with a depleted 156 isotope or with depleted 154 and 156 isotopes, and methods for making such absorbers.
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Rare Earths as Nuclear Poisons, by Ransohoff Nucleonics Jul. 1959 vol. 17, No. 7 (pp. 80-84).
Grossman Leonard N.
Jonsson Alf I.
Chelliah Meena
Combustion Engineering Inc.
Kananen Ronald P.
Mulholland John H.
Walsh Donald P.
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