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US-2022411237-A1 · Dec 29, 2022 · US
Magnetostrictive wire control rod position indicator
US2016240272A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016240272-A1 |
| Application number | US-201615018551-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 8, 2016 |
| Priority date | Feb 13, 2015 |
| Publication date | Aug 18, 2016 |
| Grant date | — |
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- Title
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Abstract
Official abstract text for this publication.
A magnetostrictive wire control rod position indicator for determining a real-time position of a control rod using a mutual interference effect between a magnetic field formed by supplying a pulse current to a magnetostrictive wire provided inside a protecting tube and a magnetic field formed by a permanent magnet of a drive shaft includes magnet members installed at an upper limit position and a lower limit position of the magnetostrictive wire control rod position indicator to cause magnetic field interference with the permanent magnet of the drive shaft.
First claim
Opening claim text (preview).
What is claimed is: 1 . A magnetostrictive wire control rod position indicator for determining a real-time position of a control rod using a mutual interference effect between a magnetic field formed by supplying a pulse current to a magnetostrictive wire provided inside a protecting tube and a magnetic field formed by a permanent magnet of a control rod drive shaft, wherein the magnetostrictive wire control rod position indicator comprises: a first magnet member and a second magnet member installed at an upper limit position and a lower limit position of the magnetostrictive wire control rod position indicator to cause magnetic field interference with the permanent magnet of the drive shaft. 2 . The magnetostrictive wire control rod position indicator of claim 1 , wherein three position signals corresponding to the upper limit position, the lower limit position, and a position of the permanent magnet of the control rod drive shaft are generated in the control rod position indicator when the permanent magnet does not cause magnetic field interference between the first magnet member and the second magnet member. 3 . The magnetostrictive wire control rod position indicator of claim 1 , wherein a position signal corresponding to the upper limit position and a reduced lower limit position signal are generated in the control rod position indicator when the permanent magnet causes destructive magnetic field interference with the second magnet member installed at the lower limit position. 4 . The magnetostrictive wire control rod position indicator of claim 1 , wherein a position signal corresponding to the upper limit position and an amplified lower limit position signal are generated in the control rod position indicator when the permanent magnet causes constructive magnetic field interference with the second magnet member installed at the lower limit position. 5 . The magnetostrictive wire control rod position indicator of claim 1 , wherein a position signal corresponding to the lower limit position and a reduced upper limit position signal are generated in the control rod position indicator when the permanent magnet causes destructive magnetic field interference with the first magnet member installed at the upper limit position. 6 . The magnetostrictive wire control rod position indicator of claim 1 , wherein a position signal corresponding to the lower limit position and an amplified upper limit position signal are generated in the control rod position indicator when the permanent magnet causes constructive magnetic field interference with the first magnet member installed at the upper limit position.
Assignees
Inventors
Classifications
- G01D5/485Primary
using magnetostrictive devices · CPC title
Means for moving control elements to desired position (dropping rods in an emergency G21C9/02) · CPC title
- G21C17/10Primary
Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain · CPC title
- G21C17/12Primary
Sensitive element forming part of control element · CPC title
Nuclear fission reactors · CPC title
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Frequently asked questions
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- What does patent US2016240272A1 cover?
- A magnetostrictive wire control rod position indicator for determining a real-time position of a control rod using a mutual interference effect between a magnetic field formed by supplying a pulse current to a magnetostrictive wire provided inside a protecting tube and a magnetic field formed by a permanent magnet of a drive shaft includes magnet members installed at an upper limit position and…
- Who is the assignee on this patent?
- Korea Atomic Energy Res
- What technology area does this patent fall under?
- Primary CPC classification G01D5/485. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Aug 18 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).