Analytical and Experimental Assessment of CANDU Fuel Sheath Integrity Under Post Dryout Conditions
NURETH-14 - 2011 September 25-30

Presented at:
2011 September 25-30
Toronto, Canada
Session Title:
E4-1 NPP Transients and Accidents Analysis

Mohamed E. Shawkat (AMEC NSS Ltd.)
Hisham Hasanein (AMEC NSS)
Yuksel Parlatan (Ontario Power Generation)
Todd Daniels (Ontario Power Generation)
Mohamed Bayoumi (AMEC NSS Ltd.)
Hassan Albasha (Bruce Power)


The experiments that investigated the CANDU fuel sheath behavior under different pressures,

temperatures, oxidizing environment, material structure (as-received or thermally treated to

attach appendages), and heating rates were reviewed and assessed to determine the limits of postdryout

duration, sheath temperature, and pressure difference across the sheath required to ensure

the fuel sheath integrity. A number of burst curves at different heating rates were studied. Timeat-

temperature fuel sheath failure maps were developed based on temperature ramp and

isothermal experiments for the 28-element fuel bundle. Analytical time-at-temperature fuel

sheath failure maps were also developed for both of 28- and 37-element fuel bundles using the

ELOCA fuel analysis computer code and were compared to the experimental time-at-temperature

sheath failure maps. Time-at-temperature sheath failure maps could be used as a simple and

effective screening tool to demonstrate fuel sheath integrity during postulated design basis


Individual Conference-Paper Copies (Electronic Where Available):

  • For CNS members, the first 5 copies per calendar year are free, and additional copies are $10 each.
  • For non-members, the price is $25 for the first Conference-paper copy in a request, and $10 each for additional copies of papers in the same conference and in the same request.
  • Contact the CNS office to order reprints.