Patent ID: 8019038

Claim:
An apparatus for watertight sealing of a steam generator nozzle, comprising: an attachment ring adapted to be fitted in an interior of said nozzle, said attachment ring comprising: a plurality of retaining tabs extending from an interior of said attachment ring towards a center of said attachment ring; a plurality of receiving slots formed between said retaining tabs; and a nozzle dam landing formed in the interior of the attachment ring below the retaining tabs; a nozzle dam adapted for insertion into said attachment ring and abutment against said nozzle dam landing, said nozzle dam comprising: two top disc segments; a plurality of radial protrusions extending from the two top disc segments of the nozzle dam and fixed with respect to the two top disc segments, said radial protrusions adapted to pass through said receiving slots of said attachment ring and directly interlock between and directly abut against said nozzle dam landing and said retaining tabs for fixing said nozzle dam in said attachment ring upon rotation of the nozzle dam in the attachment ring; and a seal covering at least a bottom side of the nozzle dam for effecting a watertight seal between the nozzle dam and the attachment ring.