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
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CFR Title: 

Content:
essary and sufficient to provide reasonable assurance that, if the inspections, tests, and analyses are performed and the acceptance criteria met, the facility has been constructed and will operate in conformity with the combined license, the provisions of the Atomic Energy Act, and the NRC's regulations. SRP Acceptance Criteria Specific SRP acceptance criteria acceptable to meet the relevant requirements of the NRC’s regulations identified above are as follows for the review described in this SRP section. The SRP is not a substitute for the NRC’s regulations, and compliance with it is not required. However, an applicant is required to identify differences between the design features, analytical techniques, and procedural measures proposed for its facility and the SRP acceptance criteria and evaluate how the proposed alternatives to the SRP acceptance criteria provide acceptable methods of compliance with the NRC regulations. Regulatory Guide (RG) 1.14 provides positions acceptable to the staff in meeting these requirements to ensure the potential for failures of the flywheels of reactor coolant pump motors in light-water-cooled power reactors is minimized. Specific criteria necessary to meet the relevant requirements of GDC 1 and 4 and 10 CFR Part 50.55a(a)(1) are as follows. 1. Materials Selection and Fabrication. The applicant's materials selection and fabrication are acceptable if they comply with the following criteria, which are derived from Subsections C.1.a and C.1.c of RG 1.14. The flywheel material is acceptable if it is produced by a process (such as vacuum melting or degassing) that minimizes flaws in the material and improves its fracture toughness properties. If the flywheel is flame cut from a plate or forging, at least 1.3 cm (1/2 inch) of material should be left on the outer and bore radii for machining to final dimensions. 2. Fracture Toughness. The pump flywheel fracture toughness properties are acceptable if they comply with the following