Document: NUREG-0800
Document ID: 8d8c874b-f1ef-4884-8228-654f526c0ce4
Document Type: srp
Title: PUMP FLYWHEEL INTEGRITY (PWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070445.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.1.1
CFR Part: 
CFR Title: 

Content:
and the interference fit, should not exceed 2/3 of the minimum specified yield strength, or 2/3 of the measured yield strength in the weak direction if appropriate tensile tests have been performed on the actual material of the flywheel. d. The shaft and the bearings supporting the flywheel should be able to withstand any combination of loads from normal operation, anticipated transients, the design basis of loss-of-coolant accident, and the safe shutdown earthquake. 30 5. Overspeed Test The following overspeed test criterion is taken from the Regulatory Guide 1.14, C.3. The applicant's commitment to perform an overspeed test is acceptable if each flywheel assembly is to be tested at the design overspeed of the flywheel. 6. Inservice Inspection (ISI) The following inservice inspection program criteria are derived from Regulatory Guide 1.14, C.4.b. The applicant's ISI program is acceptable if in compliance with the 31 following: a. A volumetric examination by ultrasonic methods of the areas of higher stress concentration at the bore and keyway at approximately 3-1/3 yearsoperating year intervals, during the refueling or maintenance shutdown coinciding with 32 the inservice inspection schedule as required by the Code, Section XI. Removal of the flywheel is not required. DRAFT Rev. 2 - April 1996 5.4.1.1-6 b. A surface examination by liquid penetrant or magnetic particle methods of all exposed surfaces, and 100% volumetric examination by ultrasonic methods at approximately ten-year intervals, during the plant shutdown coinciding with the inservice inspection schedule as required by the Code, Section XI. Removal of the flywheel is not required. c. A preservice baseline inspection incorporating all the procedures of a. and b. above, which should establish initial flywheel conditions, accessibility, and practicality of the program. d. Examination procedures and acceptance criteria should be in conformance with the requirements specified in subsection II.3.a of this SRP