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US3701227A Expired / Lapsed US ⏱️ 0.0 years remaining

Pressure tank for a nuclear reactor

Assignee: Institute for Energy Technology
•
Filing: 1970-02-27
•
Granted: 1972-10-31
•
Expires: 1990-02-27
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Abstract

Abstract The invention generally relates to a concrete pressure tank, particularly for a nuclear reactor, which is mounted in a rock shaft and prestressed by means of jacks disposed between the tank and shaft walls, in order to transfer prestressing forces to the tank from the surrounding rock. A horizontal prestressing of the above type may be combined with a conventional vertical prestressing by means of vertical prestressing cables, or even the vertical prestressing may be accomplished in the above manner by means of jacks bearing against a filler load on the top of said tank in the shaft. Said jacks are preferably of a membrane type adapted to be disposed in intervening slots between ribs, moulded either on the external tank wall or the internal shaft wall, and the opposing cylindric inner shaft or outer tank wall, respectively.

Inventors

  • 👤 Rolf Johan Lenschow

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 07:21
CPC Classifications
G; G21; G21C; G21C13/00; G21C13/02; G21C13/06; G21C13/073; Y; Y02; Y02E; Y02E30/00; Y02E30/30

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 58 words
In combination, a pressure absorbing shaft having an inner wall, a concrete pressure tank having top, bottom and side outer walls mounted in said shaft, and means for prestressing said tank and comprising jacks disposed between the outside of said tank and the wall of said shaft for transferring pressure forces from said shaft wall to said tank.
Claim 2
Dependent Claim 58 words
In combination, a pressure absorbing shaft having an inner wall, a concrete pressure tank having top, bottom and side outer walls mounted in said shaft, and means for prestressing said tank and comprising jacks disposed between the outside of said tank and the wall of said shaft for transferring pressure forces from said shaft wall to said tank.
Claim 3
Dependent Claim 15 words
The combination of claim 1, including prestressing cables prestressing said tank in the axial direction.
Claim 4
Dependent Claim 17 words
The combination of claim 1, said tank side wall being provided with a number of external ribs.
Claim 5
Dependent Claim 16 words
The combination of claim 1, said shaft wall being provided with a number of internal ribs.
Claim 6
Dependent Claim 17 words
The combination of claim 1, said jacks being disposed between said tank ribs and said shaft wall.
Claim 7
Dependent Claim 19 words
The combination of claim 1, said jacks being disposed between said shaft ribs and said tank outer side wall.
Claim 8
Dependent Claim 16 words
The combination of claim 1, said tank top and bottom walls being provided with sliding layers.
Claim 9
Dependent Claim 12 words
The combination of claim 1, including pressure absorbing spacers between adjacent jacks.
Claim 10
Dependent Claim 12 words
The combination of claim 1, said jacks being of the membrane type.
Claim 11
Dependent Claim 15 words
The combination of claim 9, each said jack comprising at least two independently operable interspaces.
Claim 12
Dependent Claim 12 words
The combination of claim 1, said tank having a double, removable lid.
Claim 13
Dependent Claim 20 words
The combination of claim 11, including a plurality of blocking members disposed between and engaging said shaft wall and lid.

References Cited (Backward Citations)

US2048253A Cited
US3056183A Cited
US3389516A Cited
US3353859A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-10-31 1976-05-01 1976-10-31 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-10-31 1980-05-01 1980-10-31 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-10-31 1984-05-01 1984-10-31 $7700.00 Window Closed / Lapsed

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