A nuclear merchant ship requires a reactor core that, unlike an electric utility power plant, must be designed to withstand additional forces as a result of ship motion. This paper describes the first phase of the Babcock & Wilcox test program for an advanced nuclear reactor design concept. The purpose of the program was to evaluate the fuel assembly design by testing beginning-of-life prototype fuel assemblies. The mechanical and hydraulic evaluation of the prototypes included tests to determine: (a) natural frequency and damping, (b) axial rotation, (c) cantilever bending, (d) dynamic and static deflection, (e) pressure drop and lift-off, (f) flow-induced vibration, (g) relative motion between fuel rod and spacer grid, and (h) spacer-grid endurance. A 9 m (29-ft) pendulum was used to obtain dynamic deflection data. High-speed motion pictures were used to analyze the flow-induced vibration data. The fuel assembly design was concluded to be satisfactory with the exception of the upper end fitting. The necessary redesign is taking place as part of a second work phase.

  • Supplemental Notes:
    • Presented at Winter Annual Meeting in New York, December 5, 1976.
  • Corporate Authors:

    American Society of Mechanical Engineers

    Two Park Avenue
    New York, NY  United States  10016-5990
  • Authors:
    • Pfund, P A
    • North, D C
    • Parekh, R J
  • Publication Date: 1976

Media Info

  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00163429
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Report/Paper Numbers: Paper 76-WA/NE-18
  • Files: TRIS
  • Created Date: Oct 29 1977 12:00AM