The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 28, 1987
Filed:
Feb. 12, 1985
Randy G Lott, Swissvale, PA (US);
Frank J Baloh, Dawson, PA (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A fuel assembly in a nuclear reactor has a spectral shift apparatus including a plurality of displacer rods for controlling reactivity in the assembly and an apparatus for refurbishing the displacer rods for reuse. Each displacer rod contains a quantity of water equivalent to a small fraction of the rod volume. Also, the spectral shift apparatus includes a manifold with a central plenum and a rupturable disk connected to the manifold. The manifold is connected in flow communication with the displacer rods. The disk which seals the displacer rods as well as the manifold plenum is rupturable at a given pressure differential thereacross so as to allow entry of the moderator/coolant liquid into the manifold and rods. Also, a screen adjacent the disk restricts it to rupturing in one direction only. The spectral shift refurbishing apparatus includes a charging tool insertable within the manifold plenum and separate air and water conduits interconnecting the manifold and upper and lower portions of the respective displacer rods in flow communication so as to provide respective entrance paths for air under pressure from the charging tool to the upper rod portions and separate exit paths for liquid from the lower rod portions to the charging tool such that introduction of air under pressure along the entrance paths will force liquid from the rods along the exit paths until the level of the liquid within the rods lowers to the level of the conduits in their lower portions.