An in situ testing apparatus for testing the integrity of rib plugs used to seal faulty reactor boiler tubes consists of a cup shaped member with a groove on the open end, {HEAD ~ a tapped hole} for attaching {TAIL ~ a hydraulic hose} of known pressure, and a hole through the top of the member 
for attaching
An in situ testing apparatus for testing the integrity of rib plugs used to seal faulty reactor boiler tubes consists of a cup shaped member with a groove on the open end , { HEAD ~ a tapped hole } for attaching { TAIL ~ a hydraulic hose } of known pressure , and a hole through the top of the member
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