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:
cted 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 tested at 5% above the maximum 26 speed anticipated during a turbine trip following loss of full load. 4. Turbine DiskRotor 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 integrity. The design of the turbine assembly should meet the following criteria: a. The design overspeed of the turbine should be 5% above the highest anticipated speed resulting from a loss of load. The basis for the assumed design overspeed should be submitted to the staff for review. b. The combined stresses of low-pressure turbine diskrotor at design overspeed due to centrifugal forces, interference fit, and thermal gradients should not exceed 0.75 of the minimum specified yield strength of the material, or 0.75 of the measured yield strength in the weak direction of the materials if appropriate tensile tests have been performed on the actual diskrotor material. c. The turbine shaft bearings should be able to withstand any combination of the normal operating loads, anticipated transients, and accidents resulting in turbine trip. d. The natural critical frequencies of the turbine shaft assemblies existing between zero speed and 20% overspeed should be controlled in the design and operation so as to cause no distress to the unit during operation. e. The turbine diskrotor design should facilitate inservice inspection of all high stress regions, including bores and keyways, without the need for removing the disks from the shaft.27 5. Inservice Inspection The applicant's inservice inspection program is acceptable if in compliance with the following criteria: The inservice inspection program for the steam