US3575002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination fossil fuel and superheated steam nuclear power plant
Assignee: COMBUSTION EIGINEERING Inc
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Filing: 1966-01-03
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Granted: 1971-04-13
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Expires: 1986-01-03
Abstract
Abstract A power plant arrangement including a nuclear reactor generating steam at a low and generally saturated temperature. A fossil-fuel fired steam generator having steam generating tubes lining the furnace walls includes a flue which contains superheater surface. Steam generated by the nuclear reactor at low temperature flows through the superheater surface located in the flue of the fossil-fuel fired steam generator to be superheated and then conveyed to a turbine.
Inventors
- 👤 Romul E Vuia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:59
CPC Classifications
F; F01; F01K; F01K3/00; F01K3/18; F01K3/181; F01K3/183; F01K3/20; F01K3/205; G; G21; G21D; G21D5/00; G21D5/04; G21D5/08; G21D5/12; G21D5/16; Y; Y02; Y02E; Y02E30/00
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
169 words
A power apparatus comprising: a fossil-fuel fired steam generating unit having a furnace including a burner zone and having water cooled tubes lining the walls of said furnace; burners for burning fossil-fuel within said burner zone and a flue for conveying combustion products away from said burner zone; a nuclear reactor steam generating means generating low temperature steam; a nuclear steam superheating surface located within said fossil-fuel fired steam generator and remote from said burner zone and entirely downstream of said burner zone with respect to the flow of said combustion products; means for conveying steam from said nuclear steam generating means to said nuclear steam superheating surface; a steam consuming prime mover; means for conveying steam from said nuclear steam superheating surface to said prime mover, said fossil-fuel fired steam generating unit containing a dead end gas pass; means for recirculating combustion products from the dead end of said dead end gas pass to the furnace; and nuclear steam superheating surface located within said dead end gas pass.
Claim 2
Dependent Claim
37 words
An apparatus as in claim 2 having also means for sensing the temperature of the steam leaving said nuclear superheater surface; and means for varying the recirculation of combustion products in response to said temperature sensing means.
Claim 3
Dependent Claim
51 words
An apparatus as in claim 2 having also a nuclear economizer located in said dead end gas pass on the dead end side of said nuclear superheater but upstream of said combustion product recirculation means; and means for conveying fluid from said nuclear economizer to said nuclear reactor steam generating means.
Claim 4
Dependent Claim
165 words
A power apparatus comprising: a fossil-fuel fired steam generating unit having a furnace including a burner zone and having water cooled tubes lining the walls of said furnace; burners for burning fossil-fuel within said burner zone and a flue for conveying combustion products away from said burner zone; a nuclear reactor steam generating means generating low temperature steam; a nuclear steam superheating surface located within said fossil-fuel fired steam generator and remote from said burner zone and entirely downstream of said burner zone with respect to the flow of said combustion products; means for conveying steam from said nuclear steam generating means to said nuclear stream superheating surface; a steam consuming prime mover; means for conveying steam from said nuclear steam super-heating surface to said prime mover; a second flue for conveying combustion products away from said burner zone; said nuclear steam superheating surface Located within one of said flues; and means to control the relative combustion product flow passing through each of said flues.
Claim 5
Dependent Claim
44 words
An apparatus as in claim 5 having also means for sensing the temperature of the steam leaving said nuclear steam superheating surface and means to control the relative combustion product flow passing through each of said flues in response to said temperature sensing means.
Claim 6
Dependent Claim
53 words
An apparatus as in claim 5 having also fossil-fuel steam superheating surface located within said steam generating unit at a location downstream of said burner zone but upstream of both of said flues and means for passing the steam generated in said fossil-fuel fired steam generating unit through said fossil-fuel fired superheating means.
Claim 7
Dependent Claim
37 words
An apparatus as in claim 5 including also fossil-fuel steam superheating surface in a second of said flues; and means for conveying steam generated in said fossil-fuel fired steam generating unit through said fossil-fuel steam superheating surface.
Claim 8
Dependent Claim
51 words
Apparatus as in claim 8 including also a fossil-fuel economizer located in the second flue at a location downstream relative to the combustion product flow from said fossil-fuel steam superheating surface; and means for conveying water from said economizer to the steam generating portion of said fossil-fuel fired steam generating unit.
Claim 9
Dependent Claim
54 words
An apparatus as in claim 5 having at least one of said flues arranged to receive hot combustion products from the furnace directly and without substantial heating surface upstream of said flue relative to the flow of combustion products; said nuclear steam superheating surface located within said one flue at an upstream location therein.
Claim 10
Dependent Claim
43 words
An apparatus as in claim 10 having also means for sensing the temperature of the steam leaving said nuclear steam superheating surface and means responsive to said temperature sensing means to regulate the relative combustion product flow passing through said plurality of flues.
Claim 11
Dependent Claim
115 words
An apparatus as in claim 8 including also a common flue downstream of said plurality of flues receiving the combustion product flow passing through said plurality of flues; a second fossil-fuel steam superheating surface in said common flue; means for conveying steam through said second fossil-fuel steam superheating surface at a location upstream with relation to steam flow through the fossil-fuel steam superheating surface in said second of said flues; a fossil-fuel economizer located in said common flue at a location downstream, with respect to combustion product flow, of said second fossil-fuel steam superheating surface; and means for conveying water from said fossil-fuel economizer to the steam generating section of said fossil-fuel fired steam generator.
Claim 12
Dependent Claim
46 words
An apparatus as in claim 12 having also nuclear economizer surface located in said common flue at a location downstream, with respect to combustion product flow, of said fossil-fuel economizer; and means for conveying water from said nuclear economizer to said nuclear reactor steam generating unit.
Claim 13
Dependent Claim
41 words
An apparatus as in claim 12 including also means for withdrawing combustion products from the flue containing the nuclear steam superheating surface at a location immediately downstream of said nuclear steam superheating surface and reintroducing said combustion products into the furnace.
Claim 14
Dependent Claim
40 words
An apparatus as in claim 14 including also means for sensing the temperature of the steam leaving said nuclear steam superheating surface; and means responsive to said temperature sensing means to regulate the reintroduction of combustion products into the furnace.
Claim 15
Dependent Claim
57 words
An apparatus as in claim 10 wherein the flue containing said nuclear steam superheating surface is a dead end pass; means to recirculate combustion products from the dead end of said dead end pass to the furnace; and means to cool said nuclear steam superheating surface in the dead end pass when steam is not passing therethrough.
Claim 16
Dependent Claim
61 words
An apparatus as in claim 5 having also means For conveying steam to said nuclear steam superheating surface from said fossil-fuel fired steam generating unit; economizer water heating surface located within a second of said flues; and means for conveying water so heated in said economizer from said economizer to the steam generating portion of said fossil-fuel fired steam generating unit.
Claim 17
Dependent Claim
45 words
An apparatus as in claim 17 having also temperature sensing means for determining the temperature of the steam leaving said steam superheating surface; and means responsive to said temperature sensing means to regulate the relative combustion product flow passing through said first and second flues.
Claim 18
Dependent Claim
57 words
An apparatus as in claim 17 having also means for withdrawing combustion products from the flue, in which the nuclear steam superheating surface is located, at a location downstream of said steam superheating surface with respect to the combustion product flow, and reintroducing said combustion products into the furnace; and means for regulating such withdrawal and reintroduction.
Claim 19
Dependent Claim
64 words
An apparatus as in claim 17 having also a common flue receiving combustion product flow from both of said flues; mixed flow water heating economizer surface located within said common flue; means for conveying water from said mixed flow economizer to said economizer water heating surface; and means for conveying heated water from said mixed flow economizer to said nuclear reactor steam generating means.
Claim 20
Dependent Claim
74 words
An apparatus as in claim 20 having also means for withdrawing cooled combustion products from said flues at a location downstream of said economizer water heating surface but upstream of said mixed flow economizer, and reintroducing said combustion products into said furnace; means for determining the temperature of the steam leaving said steam superheating surface; means for regulatingly controlling the reintroduction of combustion products into said furnace in response to said sensed stream temperature.
Claim 21
Dependent Claim
36 words
An apparatus as in claim 5 with said nuclear steam superheating surface having at least a major portion located within one of said flues; and fossil-fuel steam superheating surface located within the second of said flues.
Claim 22
Dependent Claim
43 words
An apparatus as in claim 22 having also means sensing the temperature of the steam leaving said nuclear steam superheating surface; and means responsive to said temperature sensing means to control the relative combustion product flow passing through each of said two flues.
Claim 23
Dependent Claim
46 words
An apparatus as in claim 22 having also a common flue receiving combustion products from said two flues; a fossil-fuel economizer located within said common flue; and means for conveying water from said fossil-fuel economizer to the steam generating portion of said fossil-fuel fired generating unit.
Claim 24
Dependent Claim
47 words
An apparatus as in claim 24 having also a nuclear economizer located in said common flue at a location downstream with respect to the combustion product flow of said fossil-fuel economizer; and means for conveying water from said nuclear economizer to said nuclear reactor steam generating means.
Claim 25
Dependent Claim
33 words
An apparatus as in claim 24 having also means for withdrawing combustion products from said common flue at a location downstream of said fossil-fuel economizer and introducing said combustion products into said furnace.
Claim 26
Dependent Claim
39 words
An apparatus as in claim 26 having also means for sensing the temperature of the steam leaving said nuclear steam superheater; and means responsive to said temperature sensing means to regulate the reintroduction of combustion products into the furnace.
Claim 27
Dependent Claim
34 words
An apparatus as in claim 25 having also means for withdrawing combustion products from said common flue at a location intermediate said nuclear and fossil-fuel economizers and reintroducing said combustion products into the furnace.
Claim 28
Independent Claim
121 words
A method of starting a nuclear power plant by the steps of: operating a nuclear fuel reactor to generate essentially saturated steam and establishing a first steam flow; conveying the first steam flow in thE essentially saturated condition to a turbine and bypassing the high-pressure section of the turbine; burning fossil-fuel in a combination zone and establishing a flow of combustion products; passing water in radiant heat exchange relation with the combustion zone and establishing a second steam flow; passing the first steam flow in heat exchange relation with the combustion products superheating the first steam flow; thereafter passing the first steam flow through the high-pressure section of the turbine and stopping the bypass around said high-pressure section of the turbine.
Claim 29
Independent Claim
57 words
A method of operating a superheated steam turbine having a high-pressure section and low-pressure sections comprising: passing steam serially through said turbine sections; determining the condition of the steam leaving said high-pressure section; bypassing steam around said high-pressure section in amounts sufficient to avoid wet steam within said high-pressure section in response to said determined steam condition.
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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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |