In-Service Inspection of Nuclear Power Plants - gnssn - International ...

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This publication is no longer valid Please see http://www-ns.iaea.org/standards/ M-2T9IU Rev. 8/81 8.1.4 name and certification level of personnel performing the examination. 8.1.5 Date of che examination. 8.1.6 procedure and revision number. 8.2 The Maintenance Division visual Examination Checxllst (A, B or C) shall be used to fulfill the requirements of Section 8.1 and subsequent subsections. 8.3 A copy of all completed documentation shall be forwarded by the Examiner to the appropriate Maintenance Division Supervision. B.4 The documentation shall be sent to NRMS in accordance with MA-25. Visual Examination of Valves, Pumps, No -swi-38 j R * v -: Bolting and Component Supports Approved By / Data Approved By f O«u P— * of ' 148
This publication is no longer valid Please see http://www-ns.iaea.org/standards/ ATTACHMENT "A" I SW:-3 8 VALVE/PUMP EXAMINATION OiECX OFF LIST I Page 1 Of 3 1. Itie 15: Examinee shall have sufficient light Co resolve & 1/32" Inch black 1 ir.e on an 18% neutral grey card at a distance no greater than 24 inches with an eye angle not less than 30 degrees frets the surface to be examined. 2. The ISI Examiner shall visually examine all accessible internal surfaces of Class I valve bodies or putp casings. Also, visually examine a one (1) inch annular surface of valve or pump flange surrounding each stud. These components shall be examined for deficiencies as listed on data sheet, if a deficiency exists, check appropriate box on data sheet. The following conditions shall be considered unacceptable if detected by the Examiner: a) corrosion or erosion that excessively reduces the pressure retaining wall thickness; b) wear cf mating surfaces that may lead to loss of function or leakage; or c) crack-like surface indications developed in service or grown in size beyond that recorded during preservice visual examination. 3. A satisfactory examination could include one or more of these phenomena should the ISI Engineer determine that they will not affect the integrity or function of the component. If a detected surface flaw is determined to be acceptable by the Engineer, supplemental surface or volumetric examination shall be performed. 4. The ISI Examiner shall complete, sign and date the data sheet for each valve or pump inspection performed. 5. The ISI Engineer, Mechanical Section shall review, sign and date the data sheet for each inapecticn perforated, and verify that applicable entries have been Made on the valve or pump examination check off list. 149
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