An in situ testing apparatus for testing {TAIL ~ 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, a tapped hole for attaching a hydraulic hose of known pressure, and a hole through {HEAD ~ the top} of the member 
An in situ testing apparatus for testing { TAIL ~ 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 , a tapped hole for attaching a hydraulic hose of known pressure , and a hole through { HEAD ~ the top } of the member
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