Deposition of corrosion products under pressurised water nuclear reactor conditions: The effect of flow velocity and dissolved hydrogen

Stefano Cassineri, Jonathan Duff, Andrea Cioncolini, Michele Curioni, Andrew Banks, Fabio Scenini*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The effect of water flow velocity and dissolved hydrogen on the deposition rate of Corrosion-Related Unidentified Deposit (CRUD) was investigated under conditions relevant to pressurised water nuclear reactors using type 304 l stainless steel micro-orifices. The results indicate that the CRUD build-up rate increases with hydrogen concentration because the amount of iron in solution also increases. At the same time, the fluid shear forces induce a mechanical removal of the oxide for flow velocities above 15 m/s. This suggests that the CRUD deposition process occurs under mass transport control, but the overall build-up rate is also affected by flow-induced mechanical removal.

Original languageEnglish
Article number108113
JournalCorrosion Science
Volume159
DOIs
StatePublished - Oct 2019
Externally publishedYes

Keywords

  • Corrosion deposition
  • Micro-fluidic
  • Micro-orifice
  • PWR primary water
  • Stainless steel

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