STP725

    Postirradiation Cladding Strength Under Biaxial Loading with an Increasing Temperature Ramp

    Published: Jan 1981


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    Abstract

    The flow behavior of unirradiated 20 percent cold-worked AISI 316 tubing during constant-pressure increasing-temperature tests was modeled with a constitutive-relation approach; strain below approximately 0.2 percent came predominantly from an anelastic portion of the model while higher strains were predominantly plastic. The flow of cladding sections from irradiated fuel pins was largely restricted to the strain region attributed to anelastic deformation due to reduced ductility compared with the flow in unirradiated tubing. Another major effect of irradiation exposure on cladding flow was softening, or increased strain, found with increasing irradiation temperature. This was noted only when test pressures were high enough to cause flow below 950 K.

    Keywords:

    stainless steel, mechanical properties, flow, anelasticity


    Author Information:

    Duncan, DR
    Advanced engineer and manager, Westinghouse Hanford Co., Richland, Wash.

    Hunter, CW
    Advanced engineer and manager, Westinghouse Hanford Co., Richland, Wash.


    Paper ID: STP28228S

    Committee/Subcommittee: E10.02

    DOI: 10.1520/STP28228S


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