Document: NUREG-0800
Document ID: 9756acc3-3645-4542-87b2-dba98ae1d5d5
Document Type: srp
Title: TURBINE ROTOR INTEGRITY
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0631/ML063190015.pdf
Revision Date: 2023-06
Chapter: 10
Section ID: 10.2.3
CFR Part: 
CFR Title: 

Content:
staff should review the applicant’s evaluation of how the proposed alternatives provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. 1. Materials Selection. The materials properties and the procedures used to minimize flaws and improve fracture toughness, as described by the applicant, should be reviewed and compared with the requirements of subsection II.1 of this SRP section. If a new material that is not used in prior licensed cases is utilized, the applicant's materials selection should be reviewed and evaluated to establish its acceptability. Such an evaluation should be based on the acceptance criteria of subsection II of this SRP section. 2. Fracture Toughness. The fracture toughness properties of the low-pressure turbine disk or forged or welded rotor material, including specimen test data, where applicable, should be reviewed and compared with the requirements of subsection II.2 of this SRP section. The applicant is permitted to use any of the three alternative test methods identified in Subsection II.2 of this SRP section to derive the fracture toughness of the rotor materials. 3. Pre-service Inspection. The pre-service inspection program, including finish machining, ultrasonic inspection, surface inspection, visual inspection, and spin testing, should be reviewed and compared with the requirements of subsection II.3 of this SRP section. The extent to which the ultrasonic inspections and the acceptance criteria in the SAR agree with ASME Boiler and Pressure Vessel Code, Section III, NB-2530 for plate materials or NB-2540 for forgings, should be reviewed. 4. Turbine Rotor Design. The design and stress analysis procedures used for the low- pressure turbine disks or forged or welded rotors that should be reviewed include the following information. A. Load combinations and allowable stresses at normal operating speed, B. Design overspeed and basis for selection of design overspeed, and C. Load combinations