STP1405

    Irradiation Creep Deformation of Modified 316 and 15Cr-20Ni Base Austenitic Fuel Elements Irradiated in FFTF

    Published: Jan 2001


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    Abstract

    Irradiation creep of modified 316 (PNC316) and 15Cr-20Ni base austenitic stainless steels was determined using the diametral change of the fuel pins, which were irradiated under the fission gas pressurized condition in FFTF to a peak displacement damage of 107 dpa in PNC316 and 120 dpa in 15Cr-20Ni base. The creep compliance B0 and creep-swelling coupling coefficient D were found to be 1.1 to 3.0 × 10-6 MPa-1 dpa-1 and up to 1.3 × 10-2 MPa-1 for instantaneous volumetric swelling rate, respectively. Those are almost the same level as those derived using the pressurized tubes irradiated in FFTF-MOTA. D values tend to decrease and disappear with developing void swelling.

    Keywords:

    fast breeder reactor, core material, austenitic stainless steel, irradiation creep, fuel pin, FFTF


    Author Information:

    Uehira, A
    Researcher, Japan Nuclear Cycle Development Institute, Ibaraki,

    Ukai, S
    Senior researcher and Assistant senior researcher, Japan Nuclear Cycle Development Institute, Ibaraki,

    Mizuta, S
    Senior researcher and Assistant senior researcher, Japan Nuclear Cycle Development Institute, Ibaraki,

    Puigh, RJ
    Manager, Pacific Northwest National Laboratory, Richland, WA


    Paper ID: STP10552S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP10552S


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