Fuel assembly
Description
Purpose: To ensure the reactor shutdown margin upon reactor shutdown by optimizing the arrangement for fuel rods incorporated with burnable poisons. Constitution: All of fuel rods incorporated with burnable poisons are arranged from the outermost periphery to the second layer in the lower portion of an assembly and several of them are disposed at the central portion of the assembly in the upper portion of the assembly. Such an arrangement can increase the neutron moderating effect due to reactor shutdown in the central region in the upper portion of the assembly to increase the neutron absorption by burnable poisons, by which the reactivity in the upper portion of the reactor core is suppressed to improve the reactor shutdown margin. (Kamimura, M.)
Availability note (English)
Available from JAPIO. Also available from INPADOC.Additional details
Publishing Information
- Imprint Pagination
- 5 p.
- IPC:
- Int. Cl. G21C3/32.
- IPC
- Int. Cl. G21C3/32.
- Patent number
- JP patent document 62-299790/A/
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 19078595
- Subject category
- S21: SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- BURNABLE POISONS; BWR TYPE REACTORS; FUEL ASSEMBLIES; FUEL RODS; REACTIVITY; REACTOR KINETICS; REACTOR LATTICES; REACTOR SHUTDOWN; SPECTRAL SHIFT CONTROL; VOIDS
- Descriptors DEC
- CONFIGURATION CONTROL; ENRICHED URANIUM REACTORS; FUEL ELEMENTS; KINETICS; MATERIALS; NEUTRON ABSORBERS; NUCLEAR POISONS; POWER REACTORS; REACTOR COMPONENTS; REACTOR MATERIALS; REACTORS; SHUTDOWN; THERMAL REACTORS; WATER COOLED REACTORS; WATER MODERATED REACTORS
Optional Information
- Secondary number(s)
- JP patent application 61-143053.