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[SI]: 32000 Moderator System Documents

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Number of files: 2

    1961-05-01---------Jump to [Top]
  1. NDP-2 Systems - Moderator, Course T.T.4-4.320, OPG, 1961-05-01. Doc type: Course.
    Summary:
    Keywords: [Concept] General [SI] 32000 Moderator System [Discipline] Nuclear Engineering [Topic] Intro and Overview [Phase] Design [Audience] College Engineer Technician Ugrad
    - General description only, 3 pages. NPD-TT4-4-320-1961.pdf (138 kb)
    2. 1987-06-01---------Jump to [Top]
  2. Nuclear Journal of Canada, 1987 Vol 1 No. 2, by R.L. Tapping, P.A. Lavoie, and D.J. Disney, CNS, 1987-06-01. Doc type: Paper.
    Summary: Severe pitting has occurred in moderator heat exchangers tubed with Incoloy-800 in Pickering Nuclear Generating Station. The pitting originated on the cooling water side (outside) of the tubes and perforation occurred in less than two years. It was known from corrosion testing at CRNL that Incoloy-800 was not susceptible to pitting in Lake Ontario water under isothermal conditions. Corrosion testing with heat transfer across the tube wall was carried out, and it was noted that severe pitting could occur under deposits formed on the tubes in silty Lake Ontario water. Subsequent testing, carried out in co-operation with Ontario Hydro Research Division, investigated the pitting resistance of other candidate tubing alloys: Incoloy-825, 904 L stainless steel, AL-6X, Inconel-625, 70:30 Cu:Ni, titanium, Sanicro-30 and Sanicro-28. Of these, only titanium and Saniero-28 have not suffered some degree of pitting attack in silt-containing Lake Ontario water. In the absence of silt. and hence deposits, no pitting took place on any of the alloys tested.
    Keywords: [Concept] Materials [SI] 32000 Moderator System [Discipline] Materials Engineering [Topic] Corrosion [Phase] - [Audience] Engineer Grad Ugrad
    - Corrosion of Heat Exchanger Materials under Heat Transfer Conditions NJC-1-2-05.pdf (418 kb)
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