MUSTAN HUSIEN ATTAAR
Engineers in Monroeville, PA

5396800, Mar 14, 1995

Mar 17, 1993

8/032083

David S. Drinon - Oakmont PA
Mustan Attaar - Monroeville PA
Warren R. Junker - Monroeville PA
Robert E. Shannon - Export PA

Westinghouse Electric Corporation - Pittsburgh PA

G01N 2906, G01N 2910

73623

Apparatus and method for inspecting a tubular member for degradation, which tubular member may be a control rod drive mechanism (CRDM) penetration tube of the kind typically found in nuclear power reactor pressure vessels. The CRDM penetration tube includes a thermal sleeve concentrically disposed therein, the sleeve being radially rotatable and axially translatable within the tube. However, the sleeve may be nonhomogeneous, which nonhomogeneity could undesirably mask the inspection signal as the inspection sensor is radially and axially moved in order to inspect the tube. The apparatus includes a support body sized to be disposed in the sleeve, an expandable bladder connected to the support body to engage the sleeve for securing the support body to the sleeve, one or more sensors connected to the support body for sensing the degradation in the tube, and a rotator connected to the support body for simultaneously rotating the support body, the bladder, the sensor and the sleeve in the tube to radially scan the tube. A pusher/puller mechanism is also provided, the pusher/pusher mechanism being connected to the support body for simultaneously translating the support body, the bladder, the sensor and the sleeve to axially scan the tube. As the support body is rotated and translated, the sleeve is stationary with respect to the sensor because the bladder secures the sleeve to the support body; thus, as the support body, and the sensor connected thereto are rotated and translated, the sleeve will be rotated and translated to a like extent.

4854173, Aug 8, 1989

Mar 2, 1988

7/163360

Gerry Mott - Pittsburgh PA
Mustan Attaar - Monroeville PA
Rick D. Rishel - Monroeville PA

The United States of America as represented by the United States
Department of Energy - Washington DC

G01N 2904

73600

Ultrasonic test methods are used to measure the depth of intergranular attack (IGA) in a stainless steel specimen. The ultrasonic test methods include a pitch-catch surface wave technique and a through-wall pulse-echo technique. When used in combination, these techniques can establish the extent of IGA on both the front and back surfaces of a stainless steel specimen from measurements made on only one surface.

4763274, Aug 9, 1988

Jun 24, 1986

6/878095

Warren R. Junker - Monroeville PA
George A. Savage - Belle Vernon PA
Ronald H. Ingraham - Swissvale PA
David A. Bone - Penn Hills PA
Mustan Attaar - Monroeville PA
Raymond P. Castner - Monroeville PA
Bruce J. Taszarek - Mt. Lebanon PA

Westinghouse Electric Corp. - Pittsburgh PA

G01R 3312

364481

A digital computer performs a complete eddy current analysis of the tubes of a steam generator from data input to generation of a final report. The computer extracts signatures generated by various structural features and tube defects from the data, breaks down composite signatures into their component parts and classifies each such signature by applying thereto a cascading set of experience based rules. Signatures classified as structural features are examined closely for the presence of colocated tube defects. A post processor correlates the location of the indication identified from the time based eddy current data with the known physical location of the structural features so that the position of the defects can be presented in terms of distances from fixed structures.