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:
inservice inspec- tion program for the turbine assembly should include the following: Disassembly of the turbine at approximately 10-year intervals, during plant shutdown coinciding with the inservice inspection schedule as required by ASKE Boiler and Pressure Vessel Code,. Section XI, and complete inspection of all normally inaccessible parts, such as couplings, coupling bolts, turbine shafts, low- pressure turbine blades, low-pressure disks, and high-pressure rotors. This inspection should consist of visual, surface, and volumetric.examinations, as required. III. REVIEW PROCEDURES For each area of review, the following review procedures are followed: 1. Materials Selection The materials properties and the procedures to minimize flaws and improve fracture toughness, as described by the applicant, are reviewed and com- pared with the requirements of subsection II.1 of this SRP section. If a new material not used in prior licensed cases is utilized, the applicant's materials selection is reviewed and evaluated to establish its acceptability. Such an evaluation is 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 material, including specimen test data, where applicable, are reviewed and compared with the requirements of subsection .II.2 of this SRP section. The applicant is permitted any of three alternates for deriving the fracture toughness of the disk materials. 3. Preservice Inspection The preservice inspection program, including.finish machining, ultrasonic inspection, surface inspection, visual inspection, and spin testing, is reviewed and compared with the requirements of subsection II.3 of this 10.2.3-5 Rev. 1 - July 1981 SRP section. The extent to which the ultrasonic inspections and the accep- tance criteria in the SAR agree with ASME Boiler and Pressure Vessel Code, Section III, NB-2530 for plate materials or NB-2540 for forgings, is reviewed. 4.