Life-limiting aspects of GCFR core assembly designs

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A review is made of the various potential life-limiting effects of current consideration in the GCFR core assemblies. The most life-limiting aspects are not related to individual fuel rod behavior characteristics, but rather to distortions within the rod bundles. Fuel rod internal fission gas is not limiting, as it is in most fast reactors, because of the GCFR pressure-equalization system. The life-limiting bundle distortions are the result of neutron-flux-enhanced creep and fast-fluence-induced metal swelling. These effects are somewhat unique to fast reactors and are material dependent. The current evaluations apply to the use of 20% cold-worked type 316 stainless steel ... continued below

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Pages: 20

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LaBar, M.P. July 1, 1979.

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Description

A review is made of the various potential life-limiting effects of current consideration in the GCFR core assemblies. The most life-limiting aspects are not related to individual fuel rod behavior characteristics, but rather to distortions within the rod bundles. Fuel rod internal fission gas is not limiting, as it is in most fast reactors, because of the GCFR pressure-equalization system. The life-limiting bundle distortions are the result of neutron-flux-enhanced creep and fast-fluence-induced metal swelling. These effects are somewhat unique to fast reactors and are material dependent. The current evaluations apply to the use of 20% cold-worked type 316 stainless steel as the core structural material. Alternate structural materials having lower neutron-fluence-induced metal swelling would reduce the distortions, in which case, the most life-limiting effect would likely be one of the more traditional effects such as fuel-clad mechanical interaction (FCMI).

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Pages: 20

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Dep. NTIS, PC A02/MF A01.

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  • Report No.: GA-A-15518
  • Grant Number: EY-76-C-03-0167-023
  • DOI: 10.2172/5944631 | External Link
  • Office of Scientific & Technical Information Report Number: 5944631
  • Archival Resource Key: ark:/67531/metadc1100225

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • July 1, 1979

Added to The UNT Digital Library

  • Feb. 18, 2018, 3:59 p.m.

Description Last Updated

  • April 2, 2018, 1:16 p.m.

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LaBar, M.P. Life-limiting aspects of GCFR core assembly designs, report, July 1, 1979; United States. (digital.library.unt.edu/ark:/67531/metadc1100225/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.