Isotopically enriched helium-4

Details Isotopically enriched helium-4 Isotopically enriched helium-4

1975-11-17

1978-07-18

Pitlick, Harris A.

Compositions

Radioactive compositions

Nuclear reactor fuel

62 22, 62 28, 62 40, 176 60, 252 71, 423262, F25J 308, C01B 2300, G21C 1528, C09K 500

Patent

active

041013751

ABSTRACT:
Isotopically enriched helium-4, that is to say, helium-4 which is low in helium-3, is useful as a nuclear reactor coolant. It is produced from liquefied natural gas source helium by removing helium-3 therefrom.

REFERENCES:
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patent: 3126267 (1964-03-01), Vander Arend
patent: 3251542 (1966-05-01), Newgard et al.
patent: 3421334 (1969-01-01), McKinney et al.
patent: 3609984 (1971-10-01), Garwin
"Apparatus and Method for Differential Distillation of Helium," Tully, U.S. Pat. Appl. 515,779, Oct. 17, 1974, Avail. NTIS.; C.A.84:96955y.
Fatouros et al., "Isotopically Pure He.sup.4," Cryogenics, Mar. 1975, pp. 147-148.
Mendelssohn, "Progress in Cryogenics", Heywood & Co., Ltd., vol. 1, London, 1959, p. 110.
Peshkov et al., "Experimental Work With 3He", Rep. Progs. Phys. 22 (1959), pp. 504-505.
Keller, "Helium 3 and Helium 4", Plenum Press, New York, 1969, p. 36.
Mezhov-Deglin, "An Apparatus for Producing Pure He.sup.4 ", Prib I Tekh Eksper, No. 3 (1971), p. 217, [Cryogenics, Aug. 1972, pp. 311-312].

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