Document: NUREG-0800
Document ID: a981ccac-57b3-4732-a32e-c75326443ef0
Document Type: srp
Title: PUMP FLYWHEEL INTEGRITY (PWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0636/ML063600398.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.1.1
CFR Part: 
CFR Title: 

Content:
failure need not be protected against. Information in the applicant's safety analysis report (SAR) on materials selection and the procedures used to minimize flaws and improve mechanical properties is reviewed to establish that sufficient information is provided for staff to evaluate the adequacy of the flywheel materials. 2. Fracture Toughness. Information related to the fracture toughness properties of the materials, including materials tests, correlations of Charpy specimens to fracture toughness parameters, or the alternate use of a nil-ductility transition reference temperature (RTNDT), are reviewed to establish that the flywheel materials will exhibit adequate fracture toughness at normal operating temperature. 3. Preservice Inspection. Descriptive information is reviewed to verify that the bore of the flywheel is machined to final dimensions if it is flame cut, and that ultrasonic and surface inspections are performed on all finished machined surfaces. 4. Flywheel Design. Flywheel design information, including allowable stresses, fracture analysis, design overspeed considerations, and shaft and bearing design adequacy, is reviewed. 5. Overspeed Test. The applicant's overspeed test procedures are reviewed to establish their adequacy. 6. Inservice Inspection. Descriptions of the preservice and postoperational phases of the inservice inspection program as it relates to the reactor coolant pump flywheel, including types of inspections, areas inspected, frequencies of inspection, and flaw acceptance criteria, are reviewed. 7. Inspections, Tests, Analyses, and Acceptance Criteria (ITAAC). For design certification (DC) and combined license (COL) reviews, the staff reviews the applicant's proposed ITAAC associated with the structures, systems, and components (SSCs) related to this SRP section in accordance with SRP Section 14.3, "Inspections, Tests, Analyses, and Acceptance Criteria." The staff recognizes that the review of ITAAC cannot be completed until after the