Abstract
AbstractIt is postulated that typical light water reactor (LWR) fuel pellets will crack after a few power cycles and that the majority of the pellet segments will lie against the cladding. When there is a nominal cladding-to-pellet gap at operating conditions, pellet cracking will improve the fuel-to-cladding gap conductance but will reduce the fuel thermal conductivity. A model that accounts for the effects of fuel pellet cracking on both fuel conductivity and gap conductance has been formulated. Fuel centerline temperature measurements were made during the steady-state irradiation in the Halden Heavy Boiling Water Reactor of four typical LWR-type test rods with varying fuel density and pellet-to-cladding gap sizes. Calculations using the cracked pellet model were compared to the in-pile temperature measurements, and good agreement was obtained.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
