Document: NUREG-0800
Document ID: fbcd53f5-fb4a-436f-9443-ef89f47e42cc
Document Type: srp
Title: SEISMIC AND DYNAMIC QUALIFICATION OF MECHANICAL AND ELECTRICAL
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1422/ML14227A631.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.10
CFR Part: 
CFR Title: 

Content:
unctionality under combined loadings, the stresses resulting from the applied test loads should envelop the specified service stress limit for the intended function of the component. Stresses in valve bodies and pump casings should be limited to the particular material’s elastic limit when the pump or valve is subject to the combination of normal operating loads, SSE, and other applicable dynamic loads. x. If the dynamic testing of a pump or valve assembly proves to be impracticable, static testing of 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. xi. 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 functionality of the device when the applicant shows that a meaningful test can be made in this way. xii. The test program may be based on selective testing of a representative number of components according to type, load level, size, and the like on a prototype basis. xiii. Selection of damping values for equipment to be qualified should be made in accordance with RG 1.61, “Damping Values for Seismic Design of Nuclear Power Plants.” Higher damping values may be used if justified by documented test data with proper identification of the source and mechanism. xiv. When complete testing is not practical, the features listed below should be incorporated into a test and analysis functionality assurance program for pumps and valves. Similar programs can be developed for other types of equipment. (1) Simple and passive elements, such as valve and pump bodies and their related piping and supports, may be analyzed to confirm structural integrity under