Patent Number: 6,298,108

Title: Nuclear fuel rod with upward-shifted pellet stack and a device to realizesame

Abstract: A new design concept of boiling water reactor fuel rod is disclosed. Thenew design is characterized by an upward shift in the location of the fuelpellet stack inside the fuel cladding. The resulting axial power shiftupward decreases two-phase and total pressure drop and has a stabilizingeffect. A device for affecting such fuel pellet displacement is acrushable tube placed under the fuel pellet stack, which also helps tomitigate fuel-clad mechanical interaction and reduces the likelihood ofclad failure.

Inventors: Farawila; Yousef M. (Richland, WA)

Assignee:

International Classification:

Expiration Date: 10/02/2013