Compatibility in space reactor fuel systems

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Isothermal out-of-pile tests for compatibility between Nb-1Zr, tungsten or rhenium, and UN identified high-temperature interactions. These tests demonstrated uranium transport to the inner surface of the cladding and zirconium transport from the cladding to the pellet surface. A URe/sub 2/ layer was found on the rhenium barrier of tests performed at 1800 K. No other reactions between UN and rhenium were observed. Interdiffusion of rhenium and tungsten with Nb-1Zr was consistent with rates reported in the literature. Significant cladding grain growth was observed in specimens tested at or above 1600 K. One compatibility pin was heated until the cladding melted ... continued below

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Mason, R.E. & Matthews, R.B. March 1, 1988.

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Description

Isothermal out-of-pile tests for compatibility between Nb-1Zr, tungsten or rhenium, and UN identified high-temperature interactions. These tests demonstrated uranium transport to the inner surface of the cladding and zirconium transport from the cladding to the pellet surface. A URe/sub 2/ layer was found on the rhenium barrier of tests performed at 1800 K. No other reactions between UN and rhenium were observed. Interdiffusion of rhenium and tungsten with Nb-1Zr was consistent with rates reported in the literature. Significant cladding grain growth was observed in specimens tested at or above 1600 K. One compatibility pin was heated until the cladding melted and the pin was breached. The pin components began melting below the melting point of Nb-1Zr. The cladding and end caps were first to melt; then the liquid partially dissolved the tungsten in barrier and disks and the UN from the surface of the pellet. 6 refs., 20 figs., 9 tabs.

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NTIS, PC A03/MFA 01; 1.

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  • Other Information: Portions of this document are illegible in microfiche products

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  • Other: DE88005698
  • Report No.: LA-11071-MS
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/5529702 | External Link
  • Office of Scientific & Technical Information Report Number: 5529702
  • Archival Resource Key: ark:/67531/metadc1093770

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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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  • March 1, 1988

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • May 25, 2018, 5:54 p.m.

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Mason, R.E. & Matthews, R.B. Compatibility in space reactor fuel systems, report, March 1, 1988; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1093770/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.