Nuclear fuel pin scanner

Induced nuclear reactions: processes – systems – and elements – Nuclear transmutation – By neutron bombardment

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376257, 376341, 376342, G21C 1700

Patent

active

046474200

ABSTRACT:
Systems and methods for inspection of nuclear fuel pins to determine fiss loading and uniformity. The system includes infeed mechanisms which stockpile, identify and install nuclear fuel pins into an irradiator. The irradiator provides extended activation times using an approximately cylindrical arrangement of numerous fuel pins. The fuel pins can be arranged in a magazine which is rotated about a longitudinal axis of rotation. A source of activating radiation is positioned equidistant from the fuel pins along the longitudinal axis of rotation. The source of activating radiation is preferably oscillated along the axis to uniformly activate the fuel pins. A detector is provided downstream of the irradiator. The detector uses a plurality of detector elements arranged in an axial array. Each detector element inspects a segment of the fuel pin. The activated fuel pin being inspected in the detector is oscillated repeatedly over a distance equal to the spacing between adjacent detector elements, thereby multiplying the effective time available for detecting radiation emissions from the activated fuel pin.

REFERENCES:
patent: 3018374 (1962-01-01), Pritchett
patent: 3222251 (1965-12-01), Einfeld
patent: 3436538 (1969-04-01), Basdekas
patent: 3456113 (1969-07-01), Keepin
patent: 3496357 (1970-02-01), Weinzierl et al.
patent: 4229654 (1980-10-01), Arya et al.
patent: 4497768 (1985-02-01), Caldwell et al.

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