Method of vacuum degassing and refilling a reactor coolant system
US4647425A · kind A · utility
13Cited by
12References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1984 |
| Grant date | Mar 3, 1987 |
| Priority date | — |
| Expiry date | Jan 30, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A procedure for vacuum degassing of a reactor coolant system which basically utilizes existing equipment to degas and refill the coolant system. The level of radiogas and non-radiogas concentration is reduced to low residual levels in less than two hours to expedite shutdown operations. The procedure enhances residual heat removal by using the steam generators as reflux condensers. During draindown of the reactor coolant to the midplane of the reactor vessel outlet nozzles, a two-phase pump is used and a vacuum is established in the vapor space created in the reactor pressure vessel, and the steam generators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.