ULTRASONIC INSPECTION OF A SECTION OF THE NS SAVANNAH PRIMARY PIPING SYSTEM

A section of NS Savannah primary pipe and part of a primary system gate valve were examined ultrasonically to determine whether a fluctuating flow of low-temperature makeup water entering through a nozzle in the valve had damaged the components during service. Examination was prompted by failure of a Vallecitos Boiling Water Reactor (VBWR) recirculating pipe in which makeup water was introduced under conditions similar to those in the Savannah. The ultrasonic equipment was calibrated on spare components. The calibration standards, 11-mil-deep chisel marks in the pipe and 25-mil-deep marks in the valve, were more stringent than those used to calibrate equipment for inspection of components at the time of manufacture.

  • Corporate Authors:

    Babcock and Wilcox Company

    PO Box 1260
    Lynchburg, VA  USA  24504
  • Authors:
    • Johnson, C R
  • Publication Date: 1963-10

Media Info

  • Pagination: 25 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00026694
  • Record Type: Publication
  • Source Agency: National Information Service
  • Contract Numbers: AT(11-1)-766
  • Files: TRIS
  • Created Date: May 4 1973 12:00AM