Nuclear reactivity control using laser induced polarization

Details Nuclear reactivity control using laser induced polarization Nuclear reactivity control using laser induced polarization

1990-05-23

1991-11-05

Behrend, Harvey E.

Induced nuclear reactions: processes, systems, and elements

Control component for a fission reactor

Gaseous control component

G21C 706

Patent

active

050630199

ABSTRACT:
A control element for reactivity control of a fission source provides an atomic density of .sup.3 He in a control volume which is effective to control criticality as the .sup.3 He is spin-polarized. Spin-polarization of the .sup.3 He affects the cross section of the control volume for fission neutrons and hence, the reactivity. An irradiation source is directed within the .sup.3 He for spin-polarizing the .sup.3 He. An alkali-metal vapor may be included with the .sup.3 He where a laser spin-polarizes the alkali-metal atoms which in turn, spin-couple with .sup.3 He to spin-polarize the .sup.3 He atoms.

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Laser Interaction and Related Plasma Phenomena, vol. 6, (1984), Plenum Press, New York, Hora et al., pp. 47-65.
Appl. Phys. Lett., vol. 36, No. 2, Jan. 1980, pp. 115-117, Carter et al.
Progress in Nuclear Energy, vol. 8, No. 1, 1981, pp. 35-52, Prelas et al.
Physical Review C, vol. 36, No. 6, (12/87), pp. 2244.gtoreq.2251, (Chupp et al.

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