Document: NUREG-0800
Document ID: a4f5c92f-1c1f-4a9c-b4d4-cb2fcc282cae
Document Type: srp
Title: PUMP FLYWHEEL INTEGRITY (PWR)
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340666.pdf
Revision Date: 2023-06
Chapter: 5
Section ID: 5.4.1.1
CFR Part: 
CFR Title: 

Content:
verspeed. The anticipated overspeed should include consideration of the maximum rotational speed of the flywheel if a break occurs in the reactor coolant piping in either the suction or discharge side of the pump. The basis for the assumed design overspeed should be submitted to the staff for review. c. The combined stresses at the design overspeed, due to centrifugal forces 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. 5.4.1.1-4 Rev. 1 - July 1981 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. The applicant's ISI program is acceptable if in compliance with the following: a. A volumetric examination by ultrasonic methods of the areas of higher stress concentration at the bore and keyway at approx- imately 3-1/3 years intervals, during the refueling or maintenance shutdown coinciding with the inservice inspection schedule as required by the Code, Section XI. Removal of the flywheel is not required. b. A surface examination by liquid penetrant or magnetic particle methods of all exposed surfaces, and 100% volumetric examina- tion 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