US PATENT SUBCLASS 376 / 376
.~.~.~.~.~.~ 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}
366  DF  .~.~ Plural fluids or a fluid in plural phases circulating within reactor (e.g., pressure tube reactors) {3}
370  DF  .~.~.~ With formation, separation, or manipulation of a vapor (e.g., boiling water reactor (BWR) type) {5}
373  DF  .~.~.~.~ Having specified fluid flow path or pattern within reactor core {3}
375  DF  .~.~.~.~.~ With plural, coolant passes through reactor core {1}
376.~.~.~.~.~.~ Re-entrant type

DEFINITION

Classification: 376/376

Re-entrant type:

(under subclass 375) 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 flow 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 reverse its direction and flow back through a center portion of the fuel assembly.