US4057077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear reactor steam generator installation
Assignee: Kraftwerk Union AG
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Filing: 1975-06-26
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Granted: 1977-11-08
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Expires: 1995-06-26
Abstract
Abstract In a nuclear reactor installation, a steam generator is positioned inside of a containment and has a live-steam pipe leading out of the containment. The pipe has a fast-acting shut-off valve shunted by two pressure-responsive safety valves having a smaller flow rate capacity than the shut-off valve. When the fast-acting shut-off valve is suddenly closed, the two safety valves relieve the pressure of the steam stopped by the shut-off valve. The two safety valves respond to differing steam pressures.
Inventors
- 👤 Hans-Peter Schabert
- 👤 Erwin Laurer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:26
CPC Classifications
G; G21; G21D; G21D3/00; G21D3/04; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86292; Y10T137/87265; Y10T137/877
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
163 words
A nuclear reactor installation comprising a containment having an inside and an outside, nuclear-powered means for producing a live-steam output within said inside, a live-steam pipe connected to said means and extending therefrom through said containment and away from said outside and having a cross section adequate for the pipe to conduct all of said output, a fast-acting shut-off valve within said inside and interposed in said pipe and having a cross section at least equal to the pipe's said cross section, and two pressure-responsive safety valves within said inside and connected in parallel to shunt portions of said output around said shut-off valve so that when the latter is shut the safety valves can operate to discharge said portions back into said pipe behind the shut-off valve, said safety valves each having a cross section smaller than that of said shut-off valve and being normally-closed and opening in response to respectively different steam pressures in said pipe ahead of the shut-off valve.
Claim 2
Dependent Claim
163 words
A nuclear reactor installation comprising a containment having an inside and an outside, nuclear-powered means for producing a live-steam output within said inside, a live-steam pipe connected to said means and extending therefrom through said containment and away from said outside and having a cross section adequate for the pipe to conduct all of said output, a fast-acting shut-off valve within said inside and interposed in said pipe and having a cross section at least equal to the pipe's said cross section, and two pressure-responsive safety valves within said inside and connected in parallel to shunt portions of said output around said shut-off valve so that when the latter is shut the safety valves can operate to discharge said portions back into said pipe behind the shut-off valve, said safety valves each having a cross section smaller than that of said shut-off valve and being normally-closed and opening in response to respectively different steam pressures in said pipe ahead of the shut-off valve.
Claim 3
Dependent Claim
46 words
The installation of claim 1 in which said pipe on said outside has an outside fast-acting shut-off valve and in front thereof at least one safety valve that is normally closed and opens in response to pressure in the pipe ahead of said outside shut-off valve.
Claim 4
Dependent Claim
41 words
The installation of claim 1 having two safety valves in front of the outside shut-off valve with each of these valves having a cross section such that 50% of said output can blow-off therethrough when the outside shut-off valve is closed.
Claim 5
Dependent Claim
22 words
The installation of claim 1 in which in front of at least one of said safety valves, a flow choke is interposed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |