发明名称 |
Verfahren zum Ersetzen einer Rohrdurchführung im Boden des Druckgefüsses eines druckwassergekühlten Kernreaktors |
摘要 |
Replacing a defective tube, which extends vertically through a hole (10) in the convex floor of a pressurised water nuclear reactor pressure vessel, comprises removing the tube and machining away some of the old weld metal (14) around the hole inside the vessel to leave a flat area (15). A part-spherical hollow bowl (20) is then welded to the vessel interior to cover the hole (10) and a second hole (24) is drilled in the bowl in line with the hole (10) in the vessel. A recess (23) is formed around hole (24), and a new tube (18) is inserted through the aligned holes and welded to bowl (20), the weld metal filling the recess. <IMAGE> |
申请公布号 |
DE69500606(D1) |
申请公布日期 |
1997.10.02 |
申请号 |
DE1995600606 |
申请日期 |
1995.06.26 |
申请人 |
ELECTRICITE DE FRANCE SERVICE NATIONAL, PARIS, FR |
发明人 |
ROUX, PHILIPPE, F-69450 SAINT CYR AU MONT D'OR, FR |
分类号 |
G21C13/036;(IPC1-7):G21C13/036 |
主分类号 |
G21C13/036 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|