US3928133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biological shield for a nuclear reactor
Assignee: Siemens AG
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Filing: 1973-04-24
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Granted: 1975-12-23
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Expires: 1993-04-24
Abstract
Abstract The invention discloses a biological shield for a nuclear reactor such as a pressurized-water reactor and the like. The biological shield surrounds the reactor pressure vessel and is made of concrete. The shield includes two concentric shield parts and a cooling medium is conducted through a gap conjointly defined by the shield parts.
Inventors
- 👤 Hans-Peter Schabert
- 👤 Johann Ropers
- 👤 Erich Strickroth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:28
CPC Classifications
G; G21; G21C; G21C15/00; G21C15/02; G21C11/00; G21C11/02; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
157 words
IN A NUCLEAR REACTOR EQUIPPED WITH A REACTOR PRESSURE VESSEL MADE OF STEEL AND A CONCRETE BIOLOGICAL SHIELD SURROUNDING ING THE REACTOR PRESSURE VESSEL, SAID SHIELD COMPRISING AN INNER SHIELD PART SURROUNDING THE REACTOR PRESSURE VESSEL AND AN OUTER SHIELD PART DISPOSED AROUND ND CONCENTIC TO SAID FIRST SHIELD PART, SAID INNER AND OUTER SHIELD PARTS CONJOINTLY DEFINING A GAP THEREBETWEEN, COOLING MEDIUM SUPPLY MEANS COMMUNICATING WITH SAID GAP FOR CIRCULATING A COOLING MEDIUM THERETHROUGH, SAID REACTOR PRESSURE VESSEL AND SAID INNER PART CONJOINTLY DEFINING AN INTERMEDIATE SPACE THEREBETWEEN, MEANS FOR CLOSING OFF SAID INTERMEDIATE SPACE FROM SAID GAP, SAID NUCLEAR REACTOR INCLUDING A CONTAINMENT SHELL ENCLOSING SAID BIOLOGICAL SHIELD AND SAID REACTOR PRESSURE VESSEL, SAID COOLING MEDIUM BEING AIR, AND SAID COOLING MEDIUM SUPPLY MEANS COMPRISING DISCHARGE MEANS FOR CONDUCTING THE AIR AWAY FROM SAID GAP AND INTO THE ATMOSPHERE OF SAID CONTAINMENT SHELL, SAID INNER SHIELD PART HAVING A WALL THICKNESS OF AT LEAST 20CM.
Claim 2
Dependent Claim
157 words
IN A NUCLEAR REACTOR EQUIPPED WITH A REACTOR PRESSURE VESSEL MADE OF STEEL AND A CONCRETE BIOLOGICAL SHIELD SURROUNDING ING THE REACTOR PRESSURE VESSEL, SAID SHIELD COMPRISING AN INNER SHIELD PART SURROUNDING THE REACTOR PRESSURE VESSEL AND AN OUTER SHIELD PART DISPOSED AROUND ND CONCENTIC TO SAID FIRST SHIELD PART, SAID INNER AND OUTER SHIELD PARTS CONJOINTLY DEFINING A GAP THEREBETWEEN, COOLING MEDIUM SUPPLY MEANS COMMUNICATING WITH SAID GAP FOR CIRCULATING A COOLING MEDIUM THERETHROUGH, SAID REACTOR PRESSURE VESSEL AND SAID INNER PART CONJOINTLY DEFINING AN INTERMEDIATE SPACE THEREBETWEEN, MEANS FOR CLOSING OFF SAID INTERMEDIATE SPACE FROM SAID GAP, SAID NUCLEAR REACTOR INCLUDING A CONTAINMENT SHELL ENCLOSING SAID BIOLOGICAL SHIELD AND SAID REACTOR PRESSURE VESSEL, SAID COOLING MEDIUM BEING AIR, AND SAID COOLING MEDIUM SUPPLY MEANS COMPRISING DISCHARGE MEANS FOR CONDUCTING THE AIR AWAY FROM SAID GAP AND INTO THE ATMOSPHERE OF SAID CONTAINMENT SHELL, SAID INNER SHIELD PART HAVING A WALL THICKNESS OF AT LEAST 20CM.
Claim 3
Dependent Claim
23 words
The biological shield of claim 1, said inner shield part having a wall thickness lying within the range of 60 to 70 cm.
Claim 4
Dependent Claim
34 words
The biological shield of claim 1 wherein ancillary components are provided in surrounding relation to the reactor pressure vessel, said outer shield part being configured as a supporting structure for supporting the ancillary components.
Claim 5
Dependent Claim
23 words
The biological shield of claim 1 comprising thermal insulation mounted on the inside of said inner shield part adjacent the reactor pressure vessel.
Claim 6
Dependent Claim
21 words
The biological shield of claim 1, said inner shield part containing a plurality of pipes for conducting a cooling medium therethrough.
Claim 7
Dependent Claim
55 words
The biological shield of claim 5 said pipes being U-shaped and being disposed in said inner shield part in surrounding relation to the base portion of the reactor pressure vessel, said inner shield part comprising a layer of concrete disposed between said pipes and the base of the reactor pressure vessel to shield said pipes.
Claim 8
Dependent Claim
16 words
The biological shield of claim 6, said layer having a thickness of at least 10 cm.
Claim 9
Dependent Claim
20 words
The biological shield of claim 7, said layer having a thickness lying within the range of 30 to 50 cm.
Claim 10
Dependent Claim
26 words
The biological shield of claim 6, said pipes having respective diameters selected so as to cause an even temperature distribution when conducting the cooling medium therethrough.
Claim 11
Dependent Claim
30 words
The biological shield of claim 9 wherein the said cooling medium conducted through said pipes is air, the biological shield comprising a drain line connected to each of said pipes.
Claim 12
Dependent Claim
22 words
The biological shield of claim 1, said inner shield part including a plurality of cooling channels for conducting a cooling medium therethrough.
Claim 13
Dependent Claim
30 words
The biological shield of claim 11 comprising a plurality of supporting ribs interrupting said gap between said inner shield part and said outer shield part to form said cooling channels.
Claim 14
Dependent Claim
39 words
The biological shield of claim 1, said inner shield part containing a plurality of pipes for conducting a cooling medium therethrough, and said inner shield part including a plurality of cooling channels for also conducting a cooling medium therethrough.
Claim 15
Dependent Claim
55 words
The biological shield of claim 13 said pipes being U-shaped and being disposed in said inner shield part in surrounding relation to the base portion of the reactor pressure vessel, said inner shield part comPrising a layer of concrete disposed between said pipes and the base of the reactor pressure vessel to shield said pipes.
Claim 16
Dependent Claim
16 words
The biological shield of claim 14, said layer having a thickness of at least 10 cm.
Claim 17
Dependent Claim
20 words
The biological shield of claim 15, said layer having a thickness lying within the range of 30 to 50 cm.
Claim 18
Dependent Claim
26 words
The biological shield of claim 14, said pipes having respective diameters selected so as to cause an uneven temperature distribution when conducting the cooling medium therethrough.
Claim 19
Dependent Claim
30 words
The biological shield of claim 17 wherein the said cooling medium conducted through said pipes is air, the biological shield comprising a drain line connected to each of said pipes.
Claim 20
Dependent Claim
66 words
The biological shield of claim 1, said cooling medium supply means comprising discharge means for conducting the cooling medium away from said gap, said discharge means defining a cross-section through which the cooling medium passes away from said gap, and a component structure arranged at said cross-section for limiting the free space of said cross-section through which the cooling medium can pass away from said gap.
Claim 21
Dependent Claim
57 words
The biological shield of claim 19 wherein the nuclear reactor includes main coolant lines connected with the reactor pressure vessel, the coolant lines extending through said discharge means and passing the region of said gap between said inner and outer shield parts, said component structure being a double tube surrounding said main coolant lines at said region.
Claim 22
Dependent Claim
14 words
The biological shield of claim 20, said double tube being detachable and telescopically arranged.
Claim 23
Dependent Claim
37 words
The biological shield of claim 20, said outer shield part made of concrete having a passage for accommodating the main coolant lines, said double pipe being secured in the concrete of said outer shield defining said passage.
Claim 24
Dependent Claim
28 words
The biological shield of claim 22, said double pipe and said concrete wall of said passage conjointly defining a passage space through which the cooling medium can flow.
Claim 25
Dependent Claim
39 words
The biological shield of claim 20 comprising a masonry pipe cemented into said outer shield part for accommodating the passage of the main coolant lines through the outer shield part, said double pipe being held in said masonry pipe.
Claim 26
Dependent Claim
25 words
The biological shield of claim 24, said masonry pipe and said double pipe conjointly defining a passage space through which the cooling medium can flow.
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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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |