US3878870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orifice design for the control of coupled region flow
Assignee: United States Atomic Energy Commission
•
Filing: 1974-04-16
•
Granted: 1975-04-22
•
Expires: 1994-04-16
Abstract
Abstract A fluid system arrangement for nuclear reactors comprising a triplate orifice apparatus which simultaneously controls core flow distribution, flow rate ratio between hydraulically coupled regions of the blanket and radial static pressure gradients entering and leaving the blanket fuel region. The design of the apparatus is based on the parameters of the diameter of the orifice holes, the friction factor, and expansion, contraction and turning pressure loss coefficients of the geometry of each orifice region. These above parameters are properly matched to provide the desired pressure drop, flow split and negligible cross flow at the interface of standard and power-flattened open lattice blanket regions.
Inventors
- 👤 Richard Atherton
- 👤 Peter R Spadaro
- 👤 Frank G Brummerhop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:48
CPC Classifications
G; G21; G21C; G21C15/00; G21C15/02; F; F15; F15D; F15D1/00; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
163 words
An orifice device for a nuclear reactor fluid flow channel disposed to transmit coupled fluid at least two different velocities in defined first and second regions of the channel; said device positioned at the inlet and outlet to the fluid flow channel and comprising three spaced apart flat plates each having a plurality of spaced cylindrical holes ranging in size from 0.214 to 0.419 inch diameter and arranged in a triangular pattern of identical pitch, said holes defining an area ratio from 0.08:1 to 0.40:1, the outer plates having an aligned hole pattern and the middle plate having a non-aligned hole pattern in respect to said outer plate pattern to define a plurality of cylindrical loci in parallel, non-intersecting paths, said plates having larger diameter holes in the greater velocity region than the holes in the lower velocity region, the diameter of said lower velocity holes to the diameter of said greater velocity holes defined in a ratio ranging from 1:1 to 1:1.16.
Claim 2
Dependent Claim
163 words
An orifice device for a nuclear reactor fluid flow channel disposed to transmit coupled fluid at least two different velocities in defined first and second regions of the channel; said device positioned at the inlet and outlet to the fluid flow channel and comprising three spaced apart flat plates each having a plurality of spaced cylindrical holes ranging in size from 0.214 to 0.419 inch diameter and arranged in a triangular pattern of identical pitch, said holes defining an area ratio from 0.08:1 to 0.40:1, the outer plates having an aligned hole pattern and the middle plate having a non-aligned hole pattern in respect to said outer plate pattern to define a plurality of cylindrical loci in parallel, non-intersecting paths, said plates having larger diameter holes in the greater velocity region than the holes in the lower velocity region, the diameter of said lower velocity holes to the diameter of said greater velocity holes defined in a ratio ranging from 1:1 to 1:1.16.
Claim 3
Dependent Claim
163 words
An orifice device for a nuclear reactor fluid flow channel disposed to transmit coupled fluid at least two different velocities in defined first and second regions of the channel; said device positioned at the inlet and outlet to the fluid flow channel and comprising three spaced apart flat plates each having a plurality of spaced cylindrical holes ranging in size from 0.214 to 0.419 inch diameter and arranged in a triangular pattern of identical pitch, said holes defining an area ratio from 0.08:1 to 0.40:1, the outer plates having an aligned hole pattern and the middle plate having a non-aligned hole pattern in respect to said outer plate pattern to define a plurality of cylindrical loci in parallel, non-intersecting paths, said plates having larger diameter holes in the greater velocity region than the holes in the lower velocity region, the diameter of said lower velocity holes to the diameter of said greater velocity holes defined in a ratio ranging from 1:1 to 1:1.16.
Claim 4
Dependent Claim
163 words
An orifice device for a nuclear reactor fluid flow channel disposed to transmit coupled fluid at least two different velocities in defined first and second regions of the channel; said device positioned at the inlet and outlet to the fluid flow channel and comprising three spaced apart flat plates each having a plurality of spaced cylindrical holes ranging in size from 0.214 to 0.419 inch diameter and arranged in a triangular pattern of identical pitch, said holes defining an area ratio from 0.08:1 to 0.40:1, the outer plates having an aligned hole pattern and the middle plate having a non-aligned hole pattern in respect to said outer plate pattern to define a plurality of cylindrical loci in parallel, non-intersecting paths, said plates having larger diameter holes in the greater velocity region than the holes in the lower velocity region, the diameter of said lower velocity holes to the diameter of said greater velocity holes defined in a ratio ranging from 1:1 to 1:1.16.
Claim 5
Dependent Claim
61 words
The orifice device defined in claim 1, wherein the flat plates are positioned about one-half of an inch apart, the pitch spacing is about 0.631 inch, the holes have a diameter ranging from 0.214 to 0.419 inch and the ratio of the diameter of said lower velocity holes to the diameter of said greater velocity holes ranging from unity to 1.16.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |