Method and apparatus for determining the content and distributio

Details Method and apparatus for determining the content and distributio Method and apparatus for determining the content and distributio

1983-12-21

1986-01-21

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Neutron responsive means

376159, 376367, G01T 300

Patent

active

045659265

ABSTRACT:
The disclosure is directed to an apparatus and method for determining the content and distribution of a thermal neutron absorbing material within an object. Neutrons having an energy higher than thermal neutrons are generated and thermalized. The thermal neutrons are detected and counted. The object is placed between the neutron generator and the neutron detector. The reduction in the neutron flux corresponds to the amount of thermal neutron absorbing material in the object. The object is advanced past the neutron generator and neutron detector to obtain neutron flux data for each segment of the object. The object may comprise a space reactor heat pipe and the thermal neutron absorbing material may comprise lithium.

REFERENCES:
patent: 2613325 (1952-10-01), Herzog
patent: 3577158 (1971-05-01), Hahn
patent: 3809885 (1974-05-01), Allen
patent: 4024393 (1977-05-01), Braun et al.
patent: 4243886 (1981-01-01), Untermyer, II
patent: 4365159 (1982-12-01), Young
H. O. Menlove, R. A. Forster, and D. B. Smith, "Power Reactor Fuel Assay System Employing Cf-252 Neutron Interrogation," Nuclear Safeguards Research and Development Program Status Report, Jan.-Apr. 1971, Los Alamos Scientific Laboratory Report LA-4705-MS, pp. 6-8 (May 1971).

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