Document: NUREG-0800
Document ID: b91646e8-0b07-4d85-a5e4-783b27cdcd88
Document Type: srp
Title: SEISMIC AND DYNAMIC QUALIFICATION OF MECHANICAL AND
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070286.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.10
CFR Part: 
CFR Title: 

Content:
be based upon selectively testing a representative number of components according to type, load level, size, etc., on a prototype basis. (13) Selection of damping values for equipment to be qualified should be made in accordance with Regulatory Guide 1.61 and IEEE Std. 344-1975ANSI/IEEE Std 344-1987. Higher damping values may be 37 used if justified by documented test data with proper identification of the source and mechanism. (14) When complete testing is not practicable, the features listed below should be incorporated into a test and analysis operability assurance program for pumps and valves. Similar programs can be developed for other types of equipment. 3.10-7 DRAFT Rev. 3 - April 1996 (a) Simple and passive elements, such as valve and pump bodies and their related piping and supports may be analyzed to confirm structural integrity under postulated event loadings. However, complex active devices such as pump motors, valve operator and gate or disk assemblies, and other electrical, mechanical, pneumatic, or hydraulic appurtenances which are vital to the pump or valve operation should be tested for operability. (b) The following analyses are acceptable provided they are correlated to classical problems, elementary laboratory tests, or in situ tests: i. An analysis is performed to determine the vibratory input to the valve or pump. ii. An analysis is performed to determine the system natural frequencies and the movement of the pump or valve during the dynamic events. iii. An analysis is performed to determine the pressure differential and the impact energy on a valve disc during a loss-of-coolant accident (LOCA), and to verify the design 38 adequacy of the disc. iv. An analysis is performed to determine the forcing functions of the axial and radial loads imposed on a pump rotor due to a LOCA, such that combined LOCA and vibratory effects on the shaft and rotor assembly can be evaluated. v. An analysis is performed to determine the speed of the pump shaft as a