Inherent safety phenomenon of fission-gas induced axial extrusion in oxide and metal fueled LMFBRs

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The current emphasis in LMFBR design is to develop reactor systems that contain as many features as possible to limit the severity of hypothetical accidents and provide the maximum time before corrective action is required while maintaining low capital costs. One feature is the possibility of fission-gas induced axial extrusion of the fuel within the intact cladding. The potential exists for this phenomenon to enable the reactor to withstand most accidents of the TOP variety, or at least provide an extended time for corrective action to be taken. Under transient conditions which produce a heating of the fuel above its ... continued below

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Pages: 5

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Miles, K.J. & Kalimullah January 1, 1985.

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The current emphasis in LMFBR design is to develop reactor systems that contain as many features as possible to limit the severity of hypothetical accidents and provide the maximum time before corrective action is required while maintaining low capital costs. One feature is the possibility of fission-gas induced axial extrusion of the fuel within the intact cladding. The potential exists for this phenomenon to enable the reactor to withstand most accidents of the TOP variety, or at least provide an extended time for corrective action to be taken. Under transient conditions which produce a heating of the fuel above its nominal operating temperature, thermal expansion of the material axially produces a negative reactivity effect. This effect is presently considered in most accident analysis codes. The phenomenon of fission-gas induced axial extrusion has received renewed interest because of the consideration of metal alloys of uranium and plutonium for the fuel in some current reactor designs.

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Pages: 5

Notes

NTIS, PC A02/MF A01.

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  • ANS/ENS fast reactor safety meeting, Knoxville, TN, USA, 21 Apr 1985

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  • Other: DE85005106
  • Report No.: CONF-850410-25
  • Grant Number: W-31-109-ENG-38
  • Office of Scientific & Technical Information Report Number: 5913563
  • Archival Resource Key: ark:/67531/metadc1104092

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 1985

Added to The UNT Digital Library

  • Feb. 18, 2018, 3:59 p.m.

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  • April 18, 2018, 11:22 a.m.

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Miles, K.J. & Kalimullah. Inherent safety phenomenon of fission-gas induced axial extrusion in oxide and metal fueled LMFBRs, article, January 1, 1985; Illinois. (digital.library.unt.edu/ark:/67531/metadc1104092/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.