Nuclear reactivity control using laser induced polarization

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

1989-05-26

1990-12-11

Behrend, Harvey E.

Induced nuclear reactions: processes, systems, and elements

With control of reactor

By movement of control element or by release of neutron...

376326, 376331, G21C 706

Patent

active

049769111

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 neturons 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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