公开(公告)号：EP1625593A4

公开(公告)日：2007-05-30

申请号：EP04749754

申请日：2004-04-05

申请人： WESTINGHOUSE ELECTRIC CORP

发明人： SPARROW JAMES A ,  ALESHIN YURIY ,  SLYEPTSOV ALEKSEY

IPC分类号： G21C3/00 ,  B05B20060101 ,  G21C3/33 ,  G21C7/20 ,  G21C9/00

CPC分类号： G21C3/3315 ,  G21C3/331 ,  G21C7/20 ,  G21Y2002/303 ,  G21Y2002/304 ,  G21Y2004/30 ,  Y02E30/39

摘要： A high energy absorption top nozzle for a nuclear fuel assembly that employs an elongated upper tubular housing and an elongated lower tubular housing slidable within the upper tubular housing. The upper and lower housings are biased away from each other by a plurality of longitudinally extending springs that are restrained by a longitudinally moveable piston whose upward travel is limited within the upper housing. The energy imparted to the nozzle by a control rod scram is mostly absorbed by the springs and the hydraulic affect of the piston within the nozzle.