Nuclear component with metastable cr coating, dli-mocvd method for producing same, and uses for controlling oxidation/hydridation
US-2022002865-A1 · Jan 6, 2022 · US
Control rods for light water reactors
US12183474B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12183474-B2 |
| Application number | US-202117454196-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 9, 2021 |
| Priority date | Aug 31, 2017 |
| Publication date | Dec 31, 2024 |
| Grant date | Dec 31, 2024 |
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- Title
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- Abstract
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Abstract
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A control rod for a nuclear fuel assembly is described herein that includes a neutron absorbing material having a melting point greater than 1500° C. that does not form a eutectic with a melting point less than 1500° C., and may further include a cladding material having a melting point greater than 1500° C. The cladding material is selected from the group consisting of silicon carbide, zirconium, a zirconium alloy, tungsten, and molybdenum. The absorbing material is selected from the group consisting of Gd2O3, Ir, B4C, Re, and Hf. The metal cladding or the absorbing material may be coated with an anti-oxidation coating of Cr with or without a Nb intermediate layer.
First claim
Opening claim text (preview).
What is claimed is: 1. A control rod for a nuclear fuel assembly, the control rod comprising: a solid metal rod comprising a neutron absorbing material having a melting point greater than 1500° C., wherein the neutron absorbing material has an effective neutron absorption cross-section equal to or greater than 8 Barns; and a coating on the solid metal rod, wherein the coating and the neutron absorbing material do not form a eutectic that has a melting point less than 1500° C., and wherein the coating comprises: a chromium layer; and an intermediate layer between the solid metal rod and the chromium layer, wherein the intermediate layer is in contact with an outer surface of the solid metal rod, wherein the chromium layer is in contact with an outer surface of the intermediate layer, and wherein the intermediate layer is selected from the group consisting of niobium, molybdenum, and tantalum. 2. The control rod recited in claim 1 , wherein the neutron absorbing material is selected from the group consisting of iridium and rhenium. 3. The control rod recited in claim 1 , wherein the chromium layer is an outermost surface of the control rod. 4. The control rod recited in claim 1 , wherein the intermediate layer is molybdenum. 5. The control rod recited in claim 4 , wherein the neutron absorbing material is rhenium. 6. The control rod recited in claim 4 , wherein the neutron absorbing material is iridium. 7. The control rod recited in claim 4 , wherein the neutron absorbing material is hafnium. 8. The control rod recited in claim 1 , wherein the neutron absorbing material is hafnium.
Assignees
Inventors
Classifications
Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process (C23C26/00, C23C28/00 take precedence) · CPC title
Nuclear fission reactors · CPC title
Relative disposition of the elements in the bundle lattice · CPC title
Selection of substances for use as neutron-absorbing material · CPC title
Thermal shields; Thermal linings, i.e. for dissipating heat from gamma radiation which would otherwise heat an outer biological shield {; Thermal insulation} · CPC title
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- What does patent US12183474B2 cover?
- A control rod for a nuclear fuel assembly is described herein that includes a neutron absorbing material having a melting point greater than 1500° C. that does not form a eutectic with a melting point less than 1500° C., and may further include a cladding material having a melting point greater than 1500° C. The cladding material is selected from the group consisting of silicon carbide, zirconi…
- Who is the assignee on this patent?
- Westinghouse Electric Co Llc
- What technology area does this patent fall under?
- Primary CPC classification G21C7/10. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Dec 31 2024 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).