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Fuel assembly for nuclear reactors and helical spacers have bundles of fuel pins

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专利汇可以提供Fuel assembly for nuclear reactors and helical spacers have bundles of fuel pins专利检索,专利查询,专利分析的服务。并且A fuel assembly for nuclear reactors is formed of a polygonal sheathing tube and a bundle of fuel pins inside the tube. The pins are provided with helically wound spacer elements of equal pitch. The fuel pins are of two different types, pins of type B having one more spacer element than those of type A. Each pin of type A is surrounded by six pins of type B, and each fuel pin of type B, except those at the sides of the bundle, is surrounded by alternate pins of types A and B.,下面是Fuel assembly for nuclear reactors and helical spacers have bundles of fuel pins专利的具体信息内容。

  • 2. A fuel assembly according to claim 1, each fuel comprising ceramic nuclear fuel surrounded by a cladding tube, said spacer elements consisting of the same material as the cladding tubes.
  • 3. A fuel assembly according to claim 1, wherein each spacer element consists of a wire.
  • 4. A fuel assembly according to claim 3, wherein the wire is attached to fuel pin only at the ends of the wire and under prestress.
  • 5. A fuel assembly according to claim 2, wherein each spacer element consists of a fin manufactured in one piece with the cladding tube.
  • 6. A fuel assembly according to claim 1, wherein each fuel pin carries a narrow resilient pin arranged as an extension of the fuel pin, the free end of the extension pin being attached to the grid plate.
  • 7. A fuel assembly according to claim 1, in which the fuel pins are spaced apart by a nominal distance, wherein each fuel pin combination B carries a single spacer element, the spacer element in radial direction having a height substantially equal to the nominal distance between two Adjacent fuel pins.
  • 8. A fuel assembly according to claim 1, which the fuel pins are spaced apart by a nominal distance, wherein each fuel pin combination B carries two diametrically opposite spacer elements and each fuel pin A carries one single spacer element, the spacer elements in radial direction having a height substantially equal to half the nominal distance between two adjacent fuel pins.
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