Post test evaluation of natural circulation in FFTF secondary loops

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Two transient tests in one of the FFTF secondary heat transport loops were performed (March to May 1979) in order to verify that the transition to natural convective flow could be effected from near isothermal refueling conditions without excessive cooling at the air dump heat exchangers. Following the tests, the best estimate computer model was calibrated against the data, yielding in the process insights about the loop parameters and the probable suitability of the model structure. Key empirical parameters of pressure drop and heat loss were found to be at 62% and 81% of the pretest safety evaluation model parameter ... continued below

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Pages: 19

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Beaver, T.R.; Turner, D.M. & Additon, S.L. February 1, 1980.

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Description

Two transient tests in one of the FFTF secondary heat transport loops were performed (March to May 1979) in order to verify that the transition to natural convective flow could be effected from near isothermal refueling conditions without excessive cooling at the air dump heat exchangers. Following the tests, the best estimate computer model was calibrated against the data, yielding in the process insights about the loop parameters and the probable suitability of the model structure. Key empirical parameters of pressure drop and heat loss were found to be at 62% and 81% of the pretest safety evaluation model parameter values, respectively. Pretest piping thermal transport and flow calculational models required no further revision to produce good agreement with the test data. Additional detail in the air dump heat exchanger heat loss model, accounting for long structural thermal time constants, was found to be necessary to obtain model agreement with transient outlet temperature data. The pretest model had conservatively employed steady state heat losses for transient calculations.

Physical Description

Pages: 19

Notes

Dep. NTIS, PC A02/MF A01.

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  • Specialists meeting on decay heat removal and natural circulation in FBR's, Upton, NY, USA, 28 Feb 1980

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  • Report No.: HEDL-SA-1921-FP
  • Report No.: CONF-800226-5
  • Grant Number: EY-76-C-14-2170
  • Office of Scientific & Technical Information Report Number: 5544956
  • Archival Resource Key: ark:/67531/metadc1092144

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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

  • February 1, 1980

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • June 8, 2018, 7:33 p.m.

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Beaver, T.R.; Turner, D.M. & Additon, S.L. Post test evaluation of natural circulation in FFTF secondary loops, article, February 1, 1980; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc1092144/: accessed November 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.