Document: NUREG-0800
Document ID: 611e1a8a-5fb2-4d1d-8b0e-7561bc7e46ac
Document Type: srp
Title: SEISMIC AND DYNAMIC QUALIFICATION OF MECHANICAL AND ELECTRICAL EQUIPMENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340654.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.10
CFR Part: 
CFR Title: 

Content:
f the assembly is acceptable provided that the end loadings are conservatively applied and are equal to or greater than postulated event loads, all dynamic amplification effects are accounted for, the component is in the operating mode during and after the application of loads, and an adequate analysis is made to show the validity of the static application of loads. (11) The in situ application of vibratory devices to simulate the seismic and dynamic vibratory motions on a complex active device is acceptable to confirm the operability of the device when it is shown that a meaningful test can be made in this way. (12) The test program may 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. 344-1975. Higher damping values may be 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. (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. 3.10-5 Rev. 2 - July 1981 (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