Nuclear reactor installation
US4060453A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1976 |
| Grant date | Nov 29, 1977 |
| Priority date | — |
| Expiry date | Apr 21, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87378
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a nuclear reactor installation having a containment shell, a live steam line leading outwardly from the containment shell, a fast-acting shut-off valve connected in the steam line and having a flow cross section corresponding to the cross section of the steam line, the shut-off valve including a normally open main valve disk which is actuatable to close in response to pressure from a leak in the steam line, pressure dependent means associated with the main valve disk for sensing a pressure higher than operating pressure of the steam line, an opening mechanism includes a piston-actuated auxiliary valve disk disposed in a cut-out formed in the main valve disk and having an area equal at most to one-half the flow cross-sectional area of the shut-off valve, the auxiliary valve disk being operable by the pressure-dependent means to open the cut-out opening when a pressure higher than operating pressure of the steam line is sensed by the pressure dependent means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.