Claims
- 1. A sheathing tube of a fuel rod for a boiling-water nuclear reactor, comprising:
- a zirconium alloy having a given wall thickness and containing:
- Sn: 1.45 to 1.7% by weight,
- Fe: 0.15 to 0.4% by weight,
- Cr: 0.1 to 0.3% by weight,
- Ni: up to 0.08% by weight, and a remainder technically pure zirconium; and
- an inner lining made from an inner layer having a thickness being 5 to 20% of the given wall thickness and being formed of a zirconium alloy essentially consisting of technically pure zirconium and an alloying additive of 0.2 to 0.8% by weight Fe.
- 2. The sheathing tube according to claim 1, wherein said zirconium alloy has a silicon content of between 0.005 and 0.012% by weight, an oxygen content of between 0.05 and 0.12% by weight, and a carbon content of below 0.02% by weight, and said inner layer has an iron content of at least 0.3% by weight.
- 3. The sheathing tube according to claim 1, wherein said zirconium alloy has a silicon content of between 0.005 and 0.012% by weight, an oxygen content of between 0.05 and 0.12% by weight, and a carbon content below 0.02% by weight, and said inner layer has an iron content of at most 0.6% by weight.
- 4. The sheathing tube according to claim 3, wherein said inner layer has an iron content of approximately 0.5% by weight.
- 5. The sheathing tube according to claim 1, wherein said zirconium alloy has the following composition:
- Sn: 1.45 to 1.7% by weight,
- Fe: 0.15 to 0.2% by weight,
- Cr: 0.12 to 0.25% by weight,
- Ni: 0.03 to 0.05% by weight,
- Si: 0.007 to 0.012% by weight,
- O: 0.05 to 0.11% by weight,
- C: below 0.015% by weight, and a remainder of technically pure zirconium; and
- said inner lining has the following composition:
- Fe: 0.3 to 0.6% by weight, and a remainder of technically pure zirconium.
- 6. The sheathing tube according to claim 5, wherein said inner lining has approximately 0.5% by weight of Fe.
- 7. The sheathing tube according to claim 5, wherein alloying additives precipitated in said zirconium alloy have a mean particle size of between 0.03 and 0.1 .mu..
- 8. The sheathing tube according to claim 7, wherein said alloying additives precipitated in said zirconium alloy have a mean particle size below 0.07 .mu..
- 9. A fuel rod for a boiling-water nuclear reactor, comprising:
- a sheathing tube of a zirconium alloy having a given wall thickness and containing:
- Sn: 1.45 to 1.7% by weight,
- Fe: 0.15 to 0.4% by weight,
- Cr: 0.1 to 0.3% by weight,
- Ni: up to 0.08% by weight, and a remainder technically pure zirconium; and
- an inner lining made from an inner layer having a thickness being 5 to 20% of said given wall thickness and being formed of a zirconium alloy essentially consisting of technically pure zirconium and an alloying additive of 0.2 to 0.8% by weight Fe.
- 10. The fuel rod according to claim 9, wherein said zirconium alloy has a silicon content of between 0.005 and 0.012% by weight, an oxygen content of between 0.05 and 0.12% by weight, and a carbon content of below 0.02% by weight, and said inner layer has an iron content of at least 0.3% by weight.
- 11. The fuel rod according to claim 9, wherein said zirconium alloy has a silicon content of between 0.005 and 0.012% by weight, an oxygen content of between 0.05 and 0.12% by weight, and a carbon content below 0.02% by weight, and said inner layer has an iron content of at most 0.6% by weight.
- 12. The fuel rod according to claim 11, wherein said inner layer has an iron content of approximately 0.5% by weight.
- 13. The fuel rod according to claim 9, wherein said zirconium alloy has the following composition:
- Sn: 1.45 to 1.7% by weight,
- Fe: 0.15 to 0.2% by weight,
- Cr: 0.12 to 0.25% by weight,
- Ni: 0.03 to 0.05% by weight,
- Si: 0.007 to 0.012% by weight,
- O: 0.05 to 0.11% by weight,
- C: below 0,015% by weight, and a remainder of technically pure zirconium; and
- said inner lining has the following composition:
- Fe: 0.3 to 0.6% by weight, and a remainder if technically pure zirconium.
- 14. The fuel rod according to claim 13, wherein said inner lining has approximately 0.5% by weight of Fe.
- 15. The fuel rod according to claim 13, wherein alloying additives precipitated in said zirconium alloy have a mean particle size of between 0.03 and 0.1 .mu..
- 16. The fuel rod according to claim 15, wherein said alloying additives precipitated in said zirconium alloy have a mean particle size below 0.07 .mu..
Priority Claims (1)
Number |
Date |
Country |
Kind |
92 06 038.2 |
May 1992 |
DEX |
|
CROSS-REFERENCE TO RELATED APPLICATION
This application is a Continuation of International application Ser. No. PCT/DE93/00149, filed Feb. 22, 1993.
US Referenced Citations (13)
Foreign Referenced Citations (6)
Number |
Date |
Country |
0085553 |
Aug 1983 |
EPX |
0194797 |
Sep 1986 |
EPX |
2626291 |
Jul 1989 |
FRX |
2008320 |
Sep 1970 |
DEX |
3442209 |
Jun 1985 |
DEX |
2172737 |
Sep 1986 |
GBX |