ANALYSIS--GRAPHITE CORE STRUCTURE

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A study was made to determine the structural and functional adequacy of the EGCR graphite core design. Maximum stress and distortion of the core and the probable operating time before graphite cracking were determined. The major cause of stress is non-uniform fast-neutron flux, which causes non-uniform shrinkage of graphite components. The critical stress was found to be tensile. The criterion for determining the time of cracking of graphite columns appears to be the point at which the creep strain results in rupture. Column life before cracking may also be related to the maximum allowable stress at rupture. It was concluded ... continued below

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Pages: 276

Creation Information

Newton, R.R. December 14, 1960.

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Description

A study was made to determine the structural and functional adequacy of the EGCR graphite core design. Maximum stress and distortion of the core and the probable operating time before graphite cracking were determined. The major cause of stress is non-uniform fast-neutron flux, which causes non-uniform shrinkage of graphite components. The critical stress was found to be tensile. The criterion for determining the time of cracking of graphite columns appears to be the point at which the creep strain results in rupture. Column life before cracking may also be related to the maximum allowable stress at rupture. It was concluded that non-uniform shrinkage is the major cause of distortion of graphite components of the core. In general the amount by which a column tends to bow during 20-year core life exceeds the available free space. The combined internally generated and bowing stresses result in an average period before cracking of all core columns of 14 years, with a minimum period of 6 years. (M.C.G.)

Physical Description

Pages: 276

Source

  • Other Information: Orig. Receipt Date: 31-DEC-63

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  • Report No.: TID-18251
  • Report No.: EGCR-STUDY-II-227
  • Grant Number: AT(10-1)-925
  • DOI: 10.2172/4740792 | External Link
  • Office of Scientific & Technical Information Report Number: 4740792
  • Archival Resource Key: ark:/67531/metadc1035267

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Office of Scientific & Technical Information Technical Reports

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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

  • December 14, 1960

Added to The UNT Digital Library

  • Oct. 18, 2017, 7:39 a.m.

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  • Oct. 23, 2017, 12:09 p.m.

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Newton, R.R. ANALYSIS--GRAPHITE CORE STRUCTURE, report, December 14, 1960; United States. (digital.library.unt.edu/ark:/67531/metadc1035267/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.