The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 2019
Filed:
Jul. 29, 2015
Westinghouse Electric Company Llc, Cranberry Township, PA (US);
Rachel L. Devito, Gibsonia, 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);
Westinghouse Electric Company LLC, Cranberry Township, PA (US);
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.