Mass Transfer of Stainless Steel in Pumped Sodium Loops and its Effect on Microstructure

  • Alan W. Thorley
  • Anthony Blundell
  • J. Alan Bardsley

Abstract

In the operation of sodium cooled reactors the mass transfer behaviour of corrosion products requires consideration from the standpoint of maintenance procedures if one is dealing with activated constituents from stainless steel fuel cladding (1,2,3), and also from the thermal hydraulic standpoint if in addition we are dealing with spalled oxides, entrained metal swarf or fragments from pipework surfaces. The paper highlights, using suitable photomicrographs, the type of corrosion which can occur in various parts of a loop and the form of the corrosion products which can collect in the circuit when the loops are operated with sodium containing 10 and 25 ppm oxygen. It also indicates how difficult it is to achieve a mass balance in sodium loops when the stainless steel pipework adds significantly to the corrosion product burden in the system.

Keywords

Nickel Quartz Carbide Chromium Ferrite 

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Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • Alan W. Thorley
    • 1
  • Anthony Blundell
    • 1
  • J. Alan Bardsley
    • 1
  1. 1.Risley Nuclear Power Development LaboratoriesRisleyUK

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