HTIR-TC Compensating Extension Wire Evaluations

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In an effort to reduce production costs for the doped molybdenum/niobium alloy High Temperature Irradiation Resistant Thermocouples (HTIR-TCs) recently developed by the Idaho National Laboratory, a series of evaluations were completed to identify an optimum compensating extension cable. As documented in this report, results indicate that of those combinations tested, two inexpensive, commercially-available copper nickel alloy wires approximate the low temperature (0 to 500 °C) thermoelectric output of KW-Mo (molybdenum doped with tungsten and potassium silicate) versus Nb-1%Zr in HTIR-TCs. For lower temperatures (0 to 150 °C), which is the region where soft extension cable is most often located, results ... continued below

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Daw, J. E.; Rempe, J. L.; Knudson, D. L.; Wilkins, S. C. & Crepeau, J. C. September 1, 2007.

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Description

In an effort to reduce production costs for the doped molybdenum/niobium alloy High Temperature Irradiation Resistant Thermocouples (HTIR-TCs) recently developed by the Idaho National Laboratory, a series of evaluations were completed to identify an optimum compensating extension cable. As documented in this report, results indicate that of those combinations tested, two inexpensive, commercially-available copper nickel alloy wires approximate the low temperature (0 to 500 °C) thermoelectric output of KW-Mo (molybdenum doped with tungsten and potassium silicate) versus Nb-1%Zr in HTIR-TCs. For lower temperatures (0 to 150 °C), which is the region where soft extension cable is most often located, results indicate that the thermocouple emf is best replicated by the Cu-3.5%Ni versus Cu-5%Ni combination (measured emfs were within 4% at 100 and 150 °C). At higher temperatures (300 to 500 °C), data suggest that the Cu-5%Ni versus Cu-10%Ni combination may yield data closer to that obtained with KWMo versus Nb-1%Zr wires (measured emfs were within 8%).

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  • Report No.: INL/EXT-07-13121
  • Grant Number: DE-AC07-99ID-13727
  • DOI: 10.2172/920709 | External Link
  • Office of Scientific & Technical Information Report Number: 920709
  • Archival Resource Key: ark:/67531/metadc895208

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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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  • September 1, 2007

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 29, 2016, 12:56 p.m.

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Daw, J. E.; Rempe, J. L.; Knudson, D. L.; Wilkins, S. C. & Crepeau, J. C. HTIR-TC Compensating Extension Wire Evaluations, report, September 1, 2007; [Idaho Falls, Idaho]. (digital.library.unt.edu/ark:/67531/metadc895208/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.