SUPPORT GRID-FILTER FOR FUEL ASSEMBLY OF NUCLEAR REACTOR

摘要

FIELD: power industry. ^ SUBSTANCE: in fuel assembly (FA) support grid performs function of anti-debris filter simultaneously. Support grid is made in the form of perforated plate with round holes purposed for installation of guide channels or supporting tubes and central tube with holes for heat medium transfer. It differs from existing structure by the fact that each hole for heat medium transfer is formed by two straight parallel lines and two circular arcs; it has length less than s where s is a pitch of fuel elements in bundle. At that each grid symmetry section holes for heat medium transfer are parallel to each other and forms sites located along regular triangle grid with pitch s. ^ EFFECT: improved strength and processibility of grid-filter in comparison with existing structure. ^ 3 cl, 5 dwg