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:
y I piping system is not feasible or practical, adjacent non-Seismic Category I piping should be analyzed according to the same seismic criteria applicable to the Seismic Category I piping system. For non-Seismic Category I piping systems attached to Seismic Category I piping systems, the dynamic effects of the non-Seismic Category I piping should be simulated in the modeling of the Seismic Category I piping. The attached non-Seismic Category I piping, up to the first anchor beyond the interface, also should be designed not to cause a failure of the Seismic Category I piping during an earthquake of SSE intensity. L. Criteria Used for Damping. RG 1.61, “Damping Values for Seismic Design of Nuclear Power Plants,” provides acceptable values that may be applied in damped seismic response analyses. The methods for analysis of damping should be consistent with those described in SRP Section 3.7.2. 3.9.2-20 Revision 4 – March 2017 3. To meet the requirements of GDCs 1 and 4, the following guidelines, in addition to RG 1.20, apply to the methodologies used to predict the vibration of reactor internals. If the reactor internals are a nonprototype or limited prototype design, the applicant should specify the results of tests and analyses for the valid prototype reactor and provide a summary of the results, including an assessment of the potential for adverse flow effects. Applicants should provide sufficient detail to support the classification of nonprototype or limited-prototype, even when data are obtained from nuclear power plants in other countries. Applicants are expected to provide all necessary data, even when rights to these data are held by other companies or licensees. The acceptability of any limited prototype or nonprototype designation is to be assessed on a case-by-case basis depending on the breadth and quality of the available information. In their submission, applicants/licensees should address the considerations for selecting the mathematical models