Document: NUREG-0800
Document ID: 967102fd-cb63-4897-b488-1358be1b2640
Document Type: srp
Title: TURBINE DISK INTEGRITY
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052350072.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.2.3
CFR Part: 
CFR Title: 

Content:
is method is used, KIc (dynamic) shall be used in lieu of KIC (static) in meeting the toughness criteria above. c. Estimating of KIC values at various temperatures from conventional Charpy and tensile data on the disk material using methods presented by J. A. Begley and W. A. Logsdon in Westinghouse Scientific Paper 71-1E7-MSLRF-P1 (Ref. 5). This method of obtaining KIC should be 10.2.3-3 Rev. 1 - July 1981 used only on materials which exhibit a well-defined Charpy energy and fracture appearance transition curve and are strain-rate insensi- tive. The test data and the calculated toughness curve should be submitted to the staff for review. d. Estimating "lower bound" values of KIC at various temperatures using the 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 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 forgings should be rough machined prior to heat treatment. b. Each finished disk should be subjected to 100% volumetric (ultrasonic), surface, and visual examinations using procedures and acceptance criteria equivalent to those specified for Class I components in the ASME Boiler and Pressure Vessel Code, Sections III and V. c. Finish machined bores, keyways, and drilled holes should be subjected to magnetic particle or liquid penetrant examination. No flaw indica- tions in keyway or hole regions are allowable. d. Each turbine rotor assembly should be spin tested at the maximum speed anticipated during a turbine trip following loss of full load. 4. Turbine Disk Design The applicant's design is acceptable if in compliance with the following: The turbine assembly should be designed to withstand normal conditions, anticipated transients, and accidents resulting in a turbine trip without loss of structural