FFRS: A computer program for the thermal and mechanical analysis of fuel rods

I. Misfeldt

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    FFRS, a computer code for simulation of in-pile fuel rod performance, was developed for use in reliability predictions for LWR fuel.

    As this application involves numerous fuel simulations, the model is sufficiently simple to allow for fast computer calculation, but still detailed enough for realistic simulations.

    Detailed descriptions of the stationary thermal and mechanical models are given together with the methods of solution for timedependent irradiation conditions. Models describing the important material properties for zircaloy, UO2 and the gap between fuel and cladding are included in the code.

    The influence of various parameters in the model has been investigated.

    The performance of FFRS was examined through the simulation of a large number of irradiation experiments, including sensitivity studies for some of the material properties.

    It is demonstrated that FFRS can very accurately model average fuel behaviour under normal operational conditions with very low computer costs.
    Original languageEnglish
    Place of PublicationRoskilde, Denmark
    PublisherRisø National Laboratory
    Number of pages53
    ISBN (Print)87-550-0510-1
    Publication statusPublished - 1978
    SeriesDenmark. Forskningscenter Risoe. Risoe-R


    • Risø-R-373
    • Risø-373
    • Risø report 373


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