Edward J Silva

US Patent:

20160035442, Feb 4, 2016

Filed:

Jul 29, 2015

Appl. No.:

14/812051

Inventors:

- Cranberry Township PA, US
Jason P. MAZZOCCOLI - Pittsburgh PA, US
Edward J. SILVA - Vernon CT, US
Deborah J. BUCKLEY - Evans City PA, US
Richard J. JACKO - Murrysville PA, US
William A. BYERS - Murrysville PA, US

Assignee:

WESTINGHOUSE ELECTRIC COMPANY LLC - Cranberry Township PA

International Classification:

G21C 17/022

Abstract:

The present invention relates to a pre-core hot functional testing (HFT) preconditioning process, which includes the introduction of chemical additives, e.g., zinc, into coolant water that circulates through the primary system of a new nuclear power plant, at various temperatures. The chemical additives contact the primary system surfaces, which results in the formation of a protective zinc-containing oxide film on the fresh surfaces to control corrosion release and deposition during subsequent normal operation of the nuclear power plant. The method includes a series of three chemistry phases to optimize the passivation process: 1) an alkaline-reducing phase, 2) an acid-reducing phase and 3) an acid-oxidizing phase.