Patent US3821078A successfully refreshed from Google Patents.
US3821078A
Expired / Lapsed
US
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Steam separating means for boiling water reactors
Assignee: Westinghouse Electric Sweden AB
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Filing: 1971-09-28
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Granted: 1974-06-28
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Expires: 1991-09-28
Abstract
Abstract A boiling water reactor which comprises a reactor tank and a moderator tank located inside the reactor tank has a lid with a plurality of upstanding pipes opening into steam separators. The steam separators are secured together in groups, and each group is clamped to the lid. Each steam separator has a rising tube and each unit has a bell-shaped casing common to the group and surrounding the steam separators to provide a falling surface for the water separated in the unit. Deflection caps connected together in groups corresponding to the groups of steam separators are mounted above the open tops of the steam outlet tubes of the separators.
Inventors
- 👤 R Mansson
- 👤 C Sundqvist
- 👤 L Nilsson
- 👤 L Noberius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:53
CPC Classifications
G; G21; G21C; G21C1/00; G21C1/04; G21C1/06; G21C1/08; G21C15/00; G21C15/16; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
243 words
Boiling water reactor comprising a reactor tank (1), a moderator tank (2) located inside the reactor tank and having a lid means (7), a plurality of steam separators (11) located one beside the other above the lid means, and a core (3) located inside the moderator tank, the lid means comprising a lid (8) for the moderator tank having passages (9) therethrough communicating with the steam separators to lead the steam-water mixture produced in the core to the steam separators to separate most of the water from the steam, in which the steam separators (11) are secured together in groups to form units (12), and clamping devices (13) for clamping each of said groups to the lid means, the passages (9) comprising pipe stubs (10) projecting upwardly from the lid (8) of the moderator tank and each steam separator (11) having a rising tube (14), and each unit (12) comprising a bell-shaped casing (22) common for the group and surrounding the steam separators (11) at the top, the casing being rigidly joined to the rising tube (14), and the clamping device (13) comprising at least one slim, vertical connecting rod (35), a connecting rod attachment (41) for attaching the lower end of the connecting rod to the lid means (7), the upper end of the connecting rod being provided with members (54) for at least indirectly pressing the casing (22) downwardly and thus pressing the rising tube (14) against the pipe stubs (10).
Claim 2
Dependent Claim
243 words
Boiling water reactor comprising a reactor tank (1), a moderator tank (2) located inside the reactor tank and having a lid means (7), a plurality of steam separators (11) located one beside the other above the lid means, and a core (3) located inside the moderator tank, the lid means comprising a lid (8) for the moderator tank having passages (9) therethrough communicating with the steam separators to lead the steam-water mixture produced in the core to the steam separators to separate most of the water from the steam, in which the steam separators (11) are secured together in groups to form units (12), and clamping devices (13) for clamping each of said groups to the lid means, the passages (9) comprising pipe stubs (10) projecting upwardly from the lid (8) of the moderator tank and each steam separator (11) having a rising tube (14), and each unit (12) comprising a bell-shaped casing (22) common for the group and surrounding the steam separators (11) at the top, the casing being rigidly joined to the rising tube (14), and the clamping device (13) comprising at least one slim, vertical connecting rod (35), a connecting rod attachment (41) for attaching the lower end of the connecting rod to the lid means (7), the upper end of the connecting rod being provided with members (54) for at least indirectly pressing the casing (22) downwardly and thus pressing the rising tube (14) against the pipe stubs (10).
Claim 3
Dependent Claim
99 words
Boiling water reactor according to claim 1, in which the connecting rod (35) is provided at the top with a thread (50) and a nut (54) running in said thread, which nut at least indirectly abuts against the casing (22), the connecting rod (35) above the nut (54) being provided with a head (53) which offers an attachment point for a tension member, whereby, by stretching the connecting rod (35) in relation to the casing (22) to a certain value before screwing in the nut (54) to abutment, a pre-determined pre-stressing will be obtained in the connecting rod (35).
Claim 4
Dependent Claim
25 words
Boiling water reactor according to claim 2, in which the connecting rod (35) has a long central part which is narrower than its end parts.
Claim 5
Dependent Claim
45 words
Boiling water reactor according to claim 3, in which above the thread (50) the connecting rod (35) is provided with means operable upon engagement of the gripping member to prevent the rod (35) from being twisted when the nut (54) is screwed in or out.
Claim 6
Dependent Claim
31 words
Boiling water reactor according to claim 3, in which the connecting rod (35) is passed through the casing (22) inside a supporting protective tube (36) with guides (37) for the rod.
Claim 7
Dependent Claim
27 words
Boiling water reactor according to claim 1, in which the wall of the casing (22) provides a falling surface for the water separated in the unit (12).
Claim 8
Dependent Claim
30 words
Boiling water reactor according to claim 6, in which the wall of the casing (22) is corrugated to fit the contour of the rising tube (14) in the unit (12).
Claim 9
Dependent Claim
68 words
Boiling water reactor according to claim 1, in which each steam separator (11) is of centrifugal type and has a steam outlet tube (19) projecting through the top of the casing (22) and a deflection cap (28) located above the steam outlet tube, and in which the deflection caps (28) associated with the unit (12) are mutually connected and detachably connected to the rest of the unit (12).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |