Fuel assembly and fuel spacer
Description
The spacer of the present invention ensures the inherent function of holding fuel rods at an exact position, as well as promotes heat transfer from fuel rods as a heat source to coolants thereby improving the thermal margin of the fuel assembly and reducing the void coefficient to increase the reactivitiy. That is, a notch is formed to a portion of aside wall for each cell of a fuel spacer. Then, the notch is bent so as to protrude obliquely to space between fuel rods to form vane. The vane forms a swirling stream, toward the fuel rods to coolants flowing in a two-phase flow in the space between the fuel rods. Accordingly, heat transfer from the fuel rod as the heat source to the coolants is promoted, by which the thermal margin of the fuel assembly is improved and the void coefficient is reduced to increase the reactivity. (I.S.)
Availability note (English)
Available from JAPIO. Also available from INPADOC.Additional details
Publishing Information
- Imprint Pagination
- 8 p.
- IPC:
- Int. Cl. G21C3/344.
- IPC
- Int. Cl. G21C3/344.
- Patent number
- JP patent document 2-285286/A/
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 22051966
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- BWR TYPE REACTORS; COOLANTS; FINS; FUEL ASSEMBLIES; HEAT TRANSFER; REACTOR COMPONENTS; SPACERS; THERMAL EFFICIENCY; TWO-PHASE FLOW; VANES
- Descriptors DEC
- EFFICIENCY; ENERGY TRANSFER; ENRICHED URANIUM REACTORS; FLUID FLOW; POWER REACTORS; REACTORS; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS
Optional Information
- Secondary number(s)
- JP patent application 1-106589.