US PATENT SUBCLASS 376 / 398
.~.~.~.~ Re-entrant type

Current as of: June, 1999
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376 /   HD   INDUCED NUCLEAR REACTIONS: PROCESSES, SYSTEMS, AND ELEMENTS

347  DF  REACTOR STRUCTURES {7}
361  DF  .~ Circulating fluid within reactor {6}
395  DF  .~.~ Having specified fluid flow path or pattern within reactor core {4}
397  DF  .~.~.~ Plural passes {1}
398.~.~.~.~ Re-entrant type

DEFINITION

Classification: 376/398

Re-entrant type:

(under subclass 397) Subject matter wherein the plural coolant passes, the coolant flows first along one flow path in a fuel element structure in one direction and then flows through a different flow path in the same fuel element structure in the reverse direction.

(1) Note. The flow, for example, may first be along the inner surface of the outer wall of the fuel assembly and then reverses its direction and flow back through a center portion of the fuel assembly.