GB2120448A - Improvements in nuclear reactors - Google Patents
Improvements in nuclear reactors Download PDFInfo
- Publication number
- GB2120448A GB2120448A GB08213175A GB8213175A GB2120448A GB 2120448 A GB2120448 A GB 2120448A GB 08213175 A GB08213175 A GB 08213175A GB 8213175 A GB8213175 A GB 8213175A GB 2120448 A GB2120448 A GB 2120448A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gas
- channel
- nuclear reactors
- fuel
- liner
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/02—Skids or tracks for heavy objects
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
To reduce lateral vibrations of fuel elements in advanced gas-cooled reactors which vibrations are caused by coolant flow during charge/discharge operations a perforated metal liner 4 is inserted in each gas flow channel 1 at a position above the seal bore 3 in the channel. <IMAGE>
Description
1
GB 2 120 448 A 1
SPECIFICATION
Improvements in nuclear reactors
The present invention concerns gas-cooled nuclear reactors.
5 In the advanced gas-cooled nuclear reactor the fuel is formed as clusters of fuel elements in a graphite sleeve with a number of such sleeves coupled together end-to-end and generally referred to as a "stringer". It is well known that the 10 stringers are prone to lateral vibrations principally in the seal-bore region. These are induced by coolant flow during charge-discharge operations and the aim of this invention is to reduce such flow-induced vibrations which if not checked can 15 result in damage to the stringers and/or the coolant flow channels.
According to the present invention a method of reducing flow-induced vibrations in fuel stringers of gas-cooled nuclear reactors comprises locating 20 and fixing a perforated metal liner in each gas flow channel at a position above the seal bore in each channel.
The invention will be described further, by way of example only, with reference to the 25 accompanying drawing which is a diagram of a fuel stringer within a gas-flow channel in a nuclear reactor.
Gas flows upwardly as indicated by the arrow in a flow-channel 1 and a fuel stringer 2 is free to 30 move within the channel. Towards its upper end a region of the channel has a reduced cross-section and this region is termed a seal bore 3. The form of the channel, fuel stringer and support means for the stringer will be familiar to those acquainted 35 with gas-cooled nuclear reactors and does not warrant detailed description.
A perforated liner 4 is located and fixed within the channel 2 above the seal bore 3. The liner 4 is such as to form a continuation of the seal bore i.e.
40 the diameter of the liner is substantially equal to the diameter of the gas-flow channel at the seal bore. As an example only, the liner can be 21 inches in length with a wall thickness of ■§• inch and perforations of \ inch diameter. Tapered
45 prongs (5 or the like) can be provided at the upper end of the liner. The prongs serve to provide a progressive lead-in for the fuel stringer and may assist in the location of the liner in the channel. It will be noted that the upper end of the liner
50 remains substantially free of flow blockage in the annular space behind the liner, and that the prongs (or the like) do not form a continuous blockage at this point.
Tests indicate that the introduction of the liner
55 into the upper end of the flow channel results in a significant reduction in the magnitude of lateral vibrations of the fuel stringer (induced by the gas flow) over a wide range of reactor core pressure drops.
Claims (2)
1. A method of reducing flow-induced vibrations in fuel stringers of gas-cooled nuclear reactors which comprises locating and fixing a perforated metal liner in each gas flow channel at
65 a position above the seal bore in the channel.
2. A method of reducing flow-induced vibrations in fuel stringers of gas-cooled nuclear reactors as claimed in claim 1 and substantially as herein described with reference to the
70 accompanying drawing.
Printed for Her Majesty's Stationery Office by the Courier Press, Leamington Spa, 1983. Published by the Patent Office, 25 Southampton Buildings, London, WC2A 1AY, from which copies may be obtained.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08213175A GB2119908A (en) | 1982-05-06 | 1982-05-06 | Furnace skid rails |
| GB08213175A GB2120448A (en) | 1982-05-06 | 1982-05-06 | Improvements in nuclear reactors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08213175A GB2120448A (en) | 1982-05-06 | 1982-05-06 | Improvements in nuclear reactors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2120448A true GB2120448A (en) | 1983-11-30 |
Family
ID=10530213
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08213175A Withdrawn GB2119908A (en) | 1982-05-06 | 1982-05-06 | Furnace skid rails |
| GB08213175A Withdrawn GB2120448A (en) | 1982-05-06 | 1982-05-06 | Improvements in nuclear reactors |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08213175A Withdrawn GB2119908A (en) | 1982-05-06 | 1982-05-06 | Furnace skid rails |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB2119908A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1212458A (en) * | 1968-09-23 | 1970-11-18 | Atomic Energy Authority Uk | Improvements in or relating to gas-cooled nuclear reactors |
| GB1252519A (en) * | 1969-10-07 | 1971-11-03 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3061055A (en) * | 1956-12-01 | 1962-10-30 | Alkono Ag | Connection of profilated posts and profilated posts suited for this connection |
| AT219635B (en) * | 1959-09-03 | 1962-02-12 | Maerz Ofenbau | Wall construction on industrial ovens |
| GB945196A (en) * | 1961-09-06 | 1963-12-23 | Steel Ring And Engineering Com | Improvements in, or relating to, hollow beams or bars |
| DE2033854A1 (en) * | 1970-06-30 | 1972-01-05 | Siemens Ag | Earthing switch for metal-enclosed high-voltage switchgear |
| DE2246772A1 (en) * | 1972-09-23 | 1974-03-28 | Koppers Wistra Ofenbau Gmbh | PUSH OVEN |
-
1982
- 1982-05-06 GB GB08213175A patent/GB2119908A/en not_active Withdrawn
- 1982-05-06 GB GB08213175A patent/GB2120448A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1212458A (en) * | 1968-09-23 | 1970-11-18 | Atomic Energy Authority Uk | Improvements in or relating to gas-cooled nuclear reactors |
| GB1252519A (en) * | 1969-10-07 | 1971-11-03 |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2119908A (en) | 1983-11-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |