CYCLE LENGTH EXTENSION OF SMPWR USING ZIRCALOY REFLECTOR


37th Annual CNS Conference - 2017 June 04-07

Presented at:
37th Annual CNS Conference
2017 June 04-07
Location:
Niagara Falls
Session Title:
2B4 - Advanced Reactors (II)

Authors:
J. Choe (Ulsan National Institute of Science and Technology)
H.C. Shin (KHNP-CRI)
J.E. Jung (KHNP)
H.S. Lee (KHNP)
D. Lee (Ulsan National Institute of Science and Technology)
  

Abstract

A small modular pressurized water reactor (SMPWR) design under development at UNIST loads a large amount of burnable absorber due to the no-boron operation requirement, which causes a undesirable side effect of shortened cycle length. This paper performs sensitivity tests with reflector materials to mitigate the effect and recover the cycle length. Water, stainless steel, and Zircaloy are used as candidates for reflector materials. Zircaloy reflector shows the best performance in extending the cycle length while satisfying all the design requirements.

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