Suppression of radionuclide deposition on nuclear power plant components
US11469006B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2017 |
| Grant date | Oct 11, 2022 |
| Priority date | — |
| Expiry date | Dec 31, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01P7/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
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° C. or 100° C. According to various embodiments, an instantaneous temperature of the treatment solution remains below 150° C. or 100° 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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.