Document: NUREG-0800
Document ID: 6b7eddf4-f7ce-4821-9f11-e37070221e57
Document Type: srp
Title: DYNAMIC TESTING AND ANALYSIS OF SYSTEMS, STRUCTURES, AND
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1613/ML16133A418.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.9.2
CFR Part: 
CFR Title: 

Content:
test program also should include details of actions to be taken if acceptance criteria are not satisfied. Plans should be made available for walkdown inspections and visual and nondestructive surface inspections after completion of the vibration tests. The inspection program description should include the areas subject to inspection, the methods of inspection, the design access provisions to the reactor internals, and the equipment to be used for such inspections, which preferably should follow the removal of the internals from the reactor vessel. Where removal is not feasible, the inspections should be by means of equipment appropriate for in-situ inspection. The areas inspected should include all load-bearing interfaces, core restraint devices, high-stress locations, and locations critical to safety functions. MSL valves also should be inspected if adverse flow effects (flow-induced 3.9.2-27 Revision 4 – March 2017 acoustic and structural resonances) are observed during the startup test. Further information on test procedures is addressed in RG 1.20, Revision 4, Section C.2.2.3, item b. (iii) Limits on vibration and strain, for peak, RMS, and/or spectra should be provided, along with details on procedures for checking measurements against limits. Plans for benchmarking updates should be provided in the event previous simulations do not bound measured data. More details on limits are provided in RG 1.20, Revision 4, Section C.2.2.3 item c, along with a detailed approach for BWR steam dryers. B. Power ascension and post-testing provisions. The following data should be provided and compared to limits, and used to rebenchmark simulations as necessary. (i) Vibration, strain, and pressure transducer data, including peak and RMS values, and where applicable frequency spectra, should be below acceptance limits. These acceptance limits are based on analysis results and allowable material fatigue limits. If not, rebenchmarking and reanalysis should be conducted to