Model Study of the Pressure Drop Relationships in a Typical Fuel Rod Assembly

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Description

A study was made of hydraulic characteristics of Yankee-type fuel rod assemblies using experimental and analytical methods. Two scale model fuel assemblies utilizing both ferrule and strap type arrangements were constructed and tested at atmospheric pressure and room temperature. Analytical methods using semiempirical relationships are substantiated by experimental results for both the fuel assembly having strap-type spacers and the fuel assembly having cylindrical ferruletype spacers. The experimental pressure drop across the assembly model using either straps or ferrules correlated within 5% of the value calculated by means of equations based on the equivalent diameter concept for flow inside pipes. The ... continued below

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Pages: 31

Creation Information

Berringer, R. T. & Bishop, A. A. February 1, 1959.

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Description

A study was made of hydraulic characteristics of Yankee-type fuel rod assemblies using experimental and analytical methods. Two scale model fuel assemblies utilizing both ferrule and strap type arrangements were constructed and tested at atmospheric pressure and room temperature. Analytical methods using semiempirical relationships are substantiated by experimental results for both the fuel assembly having strap-type spacers and the fuel assembly having cylindrical ferruletype spacers. The experimental pressure drop across the assembly model using either straps or ferrules correlated within 5% of the value calculated by means of equations based on the equivalent diameter concept for flow inside pipes. The individual frictional drops along the rods and across the end plates and straps correlated within 15% of the predicted pressure drops. The indlvidual pressure drops across both the staggered ferrule sections and the full ferrule section correlated to within 17% of the predicted pressure drops. Comparison of the ferrule and the strap pressure drops indicates that the pressure drop across a level of straps was more than four times the pressure drop across a full ferruled section. It is concluded that the analytical methods based on the equivalent diametcr concept can be satisfactorlly used to calculate pressure drops for flow parallel to fuel rod bundles. Experimental tests on this fuel rod configuration with either straps or ferrules indicated no excessive energy losses due to vortex formations. (auth)

Physical Description

Pages: 31

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Source

  • Other Information: For Yankee Atomic Electric Co. Orig. Receipt Date: 31-DEC-59

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  • Report No.: YAEC-75
  • Grant Number: AT(30-3)-222, SUBCONTRACT NO. 1
  • DOI: 10.2172/4268373 | External Link
  • Office of Scientific & Technical Information Report Number: 4268373
  • Archival Resource Key: ark:/67531/metadc1017078

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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, 1959

Added to The UNT Digital Library

  • Oct. 15, 2017, 10:09 p.m.

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  • Jan. 17, 2018, 2:56 p.m.

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Berringer, R. T. & Bishop, A. A. Model Study of the Pressure Drop Relationships in a Typical Fuel Rod Assembly, report, February 1, 1959; Pittsburgh, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc1017078/: accessed April 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.