Document: NUREG-0800
Document ID: 1f106a50-722f-45fa-952a-2e7ab7d836c1
Document Type: srp
Title: DYNAMIC TESTING AND ANALYSIS OF SYSTEMS, COMPONENTS, AND EQUIPMENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052360453.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.2
CFR Part: 
CFR Title: 

Content:
led model test data, forcing functions should be formulated. However, since such functions may not be unique, the computational procedures and the basis for the selection of the representative forcing functions should be described. c. Acceptable methods of obtaining dynamic responses for vibration pre- dictions are as follows: (1) Force-response computations are acceptable if the characteris- tics of the forcing functions are predetermined on a conservative basis and the mathematical model of the reactor internals is appropriately representative of the design. (2) If the forcing functions are not predetermined, either a special analysis of the response signals measured from reactor internals of similar design may be performed to predict amplitude and modal contributions, or parameter studies useful for extrapolat- ing the results from tests of internals or components of similar designs based on composite statistics may be used. 3.9.2-12 Rev. 2 - July 1981 d. Vibration predictions should be verified by test results. If the test results differ substantially from the predicted response behavior, the vibration analysis should be appropriately modified to improve the agreement with test results and to validate the analy- tical method as appropriate for predicting responses of the prototype unit, as well as of other units where confirmatory tests are to be conducted. 4. Relevant requirements of GDC 1 and 4 are met as given below. The pre- operational vibration test program for the internals of a prototype (first of a design) reactor should conform to the requirements for a prototype test, as specified in Regulatory Guide 1.20, including vibra- tion prediction, vibration monitoring, data reduction, and surface inspection. The test program to demonstrate design adequacy of the reactor internals should include, but not necessarily be limited to the following: a. The vibration testing should be conducted with the fuel elements in the core or with dummy elements which provide