Electric Power Research Institute Incorporated

Dominion Engineering, Inc.

Charles Marks

Robert Douglas Varrin, Jr

Keith Paul Fruzzetti

Michael J Little

Karen Samie Kim

Robert Douglas Varrin

A method for depositing zinc on the surfaces of a coolant loop of a nuclear power plant includes: providing within a portion of the coolant loop a treatment solution comprising zinc and optionally one or more noble metals and/or reducing agent(s); allowing the treatment solution to remain in the portion for a treatment period; and removing the treatment solution from the portion. According to various embodiments, an average temperature of the treatment solution over the course of the treatment period is less than 150&#xb0; C. or 100&#xb0; C. According to various embodiments, an instantaneous temperature of the treatment solution remains below 150&#xb0; C. or 100&#xb0; C. throughout the treatment period. The zinc deposition treatment may be applied (1) before the plant is first put into power-generating operation or (2) during an outage following power-generating operation and optionally following a chemical decontamination to remove any oxides formed on surfaces of a coolant loop during prior power operation period(s).

Suppression of radionuclide deposition on nuclear power plant components

Crystal habit modifiers (CHM) are provided to ameliorate deposit-related concerns in nuclear plant systems. The principal targets for utilization of crystal habit modifiers are Pressure Water Reactor (PWR) primary-side fuel rod crud and secondary-side steam generator deposits and Boiling Water Reactor (BWR) coolant system deposits.

Crystal habit modifiers for nuclear power water chemistry control of fuel deposits and steam generator crud

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McLean, VA, United States of America

Charles Marks