US3930943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nuclear power plant component protection
Assignee: Siemens AG
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Filing: 1973-11-21
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Granted: 1976-01-06
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Expires: 1993-11-21
Abstract
Abstract A nuclear power plant installation includes a concrete biological shield forming a pit in which a reactor pressure vessel is positioned. A steam generator on the outside of the shield is connected with the pressure vessel via coolant pipe lines which extend through the shield, the coolant circulation being provided by a coolant pump which is also on the outside of the shield. To protect these components on the outside of the shield and which are of mainly or substantially cylindrical shape, semicylindrical concrete segments are interfitted around them to form complete outer cylinders which are retained against outward separation radially from the components, by rings of high tensile steel which may be interspaced so closely that they provide, in effect, an outer steel cylinder. The invention is particularly applicable to pressurized-water coolant reactor installations.
Inventors
- 👤 Eberhard Michel
- 👤 Richard Ruf
- 👤 Heinrich Dorner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:03
CPC Classifications
G; G21; G21C; G21C13/00; G21C13/08; G21C13/093; G21C13/0933; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
96 words
A nuclear power plant installation comprising a concrete biological shield forming a pit, a reactor pressure vessel positioned in said pit, a steam generator having a substantially cylindrical side wall and positioned on the outside of said pit, and coolant pipe lines of substantially cylindrical shape and interconnecting said vessel and generator by extending through said shield; wherein the improvement comprises segmentally cylindrical segments interfitted to form cylindrical enclosures surrounding said generator and line on the outside of said shield, and which are made of non-metallic heat-insulating material, and high-tensile strength metal elements encircling said segments.
Claim 2
Dependent Claim
96 words
A nuclear power plant installation comprising a concrete biological shield forming a pit, a reactor pressure vessel positioned in said pit, a steam generator having a substantially cylindrical side wall and positioned on the outside of said pit, and coolant pipe lines of substantially cylindrical shape and interconnecting said vessel and generator by extending through said shield; wherein the improvement comprises segmentally cylindrical segments interfitted to form cylindrical enclosures surrounding said generator and line on the outside of said shield, and which are made of non-metallic heat-insulating material, and high-tensile strength metal elements encircling said segments.
Claim 3
Dependent Claim
13 words
The installation of claim 1 in which said segments are made of concrete.
Claim 4
Dependent Claim
15 words
The installation of claim 2 in which said segments are enclosed by sheet metal casings.
Claim 5
Dependent Claim
28 words
The installation of claim 3 in which said segments form a series of cylindrical rings with each two adjacent rings having their end formed with mutually interlocking steps.
Claim 6
Dependent Claim
26 words
The installation of claim 4 in which said rings are axially held together by axially extending high-tensile strength tension elements uniformly distributed circumferentially throughout said enclosures.
Claim 7
Dependent Claim
20 words
The installation of claim 5 in which said enclosures have metal end members to which said tension elements are connected.
Claim 8
Dependent Claim
37 words
The installation of claim 6 in which said tension elements have lengths proportioned relative to the lengths of said enclosure when cold so that with thermal expansion of said enclosures the latter are placed under axial compression.
Claim 9
Dependent Claim
32 words
The installation of claim 7 in which said steam generator is positioned by means permitting the generator to move to relieve stress when said pipe line's enclosures thermally expand and contract axially.
Claim 10
Dependent Claim
40 words
The installation of claim 1 in which a coolant pump is on the outside of said shield and connected with said pipe line, said pump being of other than cylindrical shape and being enclosed by interfitting shells made of metal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |