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:
e is a potential source of high-energy missiles that could compromise the function of plant components designated as important to safety. Protection from these missiles is provided by placing specific requirements on turbines relative to materials, fabrication, inspections during fabrication, and inservice inspections, thus ensuring that failure of a turbine will be highly unlikely. Meeting the requirements of GDC 4 provides assurance that the turbine will not be a source of missiles that could damage systems, structures, and components, thereby decreasing the potential for release of fission products to the environment that could lead to offsite doses in excess of reference values cited in 10 CFR Part 100.31 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 compared with the requirements of subsection II.l 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 or forged or welded rotor material, including specimen test data, where applicable, are reviewed and 32 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 diskrotor materials. 10.2.3-7 DRAFT Rev. 2 - April 1996 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 SRP section. The extent to which the