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:
licant’s plans to obtain and evaluate BWR steam dryer vibration and stress measurements. Key review elements include: 3.9.2-11 Revision 4 – March 2017 (i) Data from hood and skirt instrumentation, including pressure sensors, accelerometers, and strain gages. (ii) RMS and frequency-dependent acceptance limits on the instrumentation. (iii) Cumulative alternating stress analyses for the locations showing the highest stress levels. (iv) Remote testing and monitoring of dryer vibration through MSL strain gage arrays, and whether the projected dryer loading and alternating stresses are acceptable for remote monitoring (rather than on-dryer instrumentation). Further details are provided in RG 1.20, Revision 4. 5. Dynamic system analyses should confirm the structural design adequacy and ability, with no loss of function, of the reactor internals to withstand the loads from a loss-of-coolant accident (LOCA) in combination with the safe-shutdown earthquake (SSE). The staff review addresses the methods of analysis, the considerations in defining the mathematical models, the descriptions of the forcing functions, the computational scheme, the acceptance criteria, and the interpretation of analytical results. 6. The testing methods should include a description of their use to correlate results from the reactor internals vibration and stress tests with the analytical results from dynamic analyses of the reactor internals under steady-state and operational flow transient conditions and under any significant loading induced by adverse flow conditions, or by mechanical or acoustic resonance effects. Where applicable, the methods should also include a description of how they will be used to correlate any SMT results with those of analytical simulations or in-plant measurements. Plans for benchmarking analytic results should be reviewed. In particular, methods for determining conservative bias errors and uncertainties should be assessed. It is preferable for applicants to apply