Nozzle dam locking pin assembly
 A nuclear steam generator isolation dam (28) locking pin (36) is slidably mounted and spring (52) biased in an axial bore (42,44) of a body (40) press fit in a dam boss (32). The pin (36) is actuated by a lever (54) in a slot (54,58,62) for selective lock-in, lock-out and spring biased travel for seeking its keeper (27) in the wall (26) of the nozzle. 
Combustion Engineering, Inc.
G Y F
G21C Y02E F22B
inventional additional inventional
James W. Lee A.
Rogers, Jr. Tade, III