Document: NUREG-0800
Document ID: 60504484-b86d-4048-bba0-59d150675db4
Document Type: srp
Title: TURBINE DISKROTOR  INTEGRITY
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070578.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.2.3
CFR Part: 
CFR Title: 

Content:
atic) in meeting the toughness criteria above. Ic c. Estimating of K values at various temperatures from conventional Charpy and Ic tensile data on the diskrotor material using methods presented by J. A. Begley and W. A. Logsdon in Westinghouse Scientific Paper 71-1E7-MSLRF-P1 (Ref. 5). 21 This method of obtaining K should be used only on materials which exhibit a Ic well-defined Charpy energy and fracture appearance transition curve and are strain-rate insensitive. The test data and the calculated toughness curve should be submitted to the staff for review. d. Estimating "lower bound" values of K at various temperatures using the Ic equivalent energy concept of F. J. Witt and T. R. Mager, ORNL-TM-3894 (Ref. 6). Load-displacement data from the compact tension specimens and the 22 calculated toughness data should be submitted to the staff for review. 3. Preservice Inspection The applicant's preservice inspection program is acceptable if in compliance with the following criteria: a. Disk forgingsForged or welded rotors should be rough machined prior to heat 23 treatment. b. Each finished diskforged or welded rotor should be subjected to 24 100% volumetric (ultrasonic), surface, and visual examinations using procedures and acceptance criteria equivalent to those specified for Class 1 components in the ASME Boiler and Pressure Vessel Code, Sections III and V. Before welding and/or brazing, all surfaces prepared for welding and/or brazing should be surface examined. After welding and/or brazing, all surfaces exposed to steam should be surface examined, giving particular attention to stress risers and welds. Welds should be ultrasonically examined in the radial and radial-tangential sound beam directions.25 c. Finish machined bores, keyways, and drilled holes should be subjected to magnetic particle or liquid penetrant examination. No flaw indications in keyway or hole regions are allowable. 10.2.3-5 DRAFT Rev. 2 - April 1996 d. Each turbine rotor assembly should be spin