Patent ID: 9207217
Filing Date: 2015-12-08
Classification: G01N,G21C,Y02E

Abstract:
1. An apparatus for ultrasonic inspection of an access hole cover weld on a core shroud support plate in a boiling water reactor containing jet pumps, the apparatus comprises: a base positioned on the core shroud support plate and substantially centered and secured on a surface of an access hole cover; a center frame coupled to the base and projecting vertically relative to the access hole cover; a radial arm assembly comprising a radial arm having a first end and an opposite second end, said radial arm assembly attached to the center frame; a radial extend/retract motor assembly coupled to the radial arm assembly and structured to control position of the radial arm radially inward and outward from the center frame; an axial rotate motor assembly coupled to the center frame and structured to control rotation of the center frame about a center vertical axis; a first pneumatic linear thruster attached to the first end of said radial arm; a second pneumatic linear thruster attached to the second opposite end of said radial arm, the second pneumatic linear thruster having an upper end and a lower end; a scanning assembly attached to the first pneumatic linear thruster, said scanning assembly, comprising: