Method of reducing radioactivity in nuclear plant
US4820473A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1985 |
| Grant date | Apr 11, 1989 |
| Priority date | — |
| Expiry date | Nov 6, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S376/90
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention is concerned with a method of reducing radioactivity in a nuclear plant by preliminarily forming oxide films on the surfaces of metallic structural members to be in contact with high-temperature and high-pressure reactor water containing radioactive substances before said metallic members are exposed to said reactor water. The method is characterized by the steps of subjecting said structural members to a first-step oxidation treatment of heating said structural members in an environment of a high temperature, and further subjecting the thus treated structural members to a second step oxidation treatment of heating said treated structural members in an environment having a higher oxidizing capacity than that of said environment in said first-step oxidation treatment to form a denser oxide film than an oxide film obtained in said first step oxidation treatment. According to the present invention, radioactivity in the nuclear plant can be reduced remarkably.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.