Document: NUREG-0800
Document ID: 228b9b6e-c81e-4d76-9b8e-12f6c3bd7fa1
Document Type: srp
Title: and Regulatory Guide 1.92,(Reference 10) "Combining Modal Responses
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070336.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.2
CFR Part: 
CFR Title: 

Content:
is rigid in the vertical direction based on the definition for rigidity given in subsection II.2.h of this SRP section. i. Torsional Effects of Eccentric Masses The procedures for seismic analysis of Category I piping systems are reviewed to determine compliance with the acceptance criteria of subsection II.2.i of this SRP section. j. Category I Buried Piping Systems The analysis procedures for Category I buried piping are reviewed to determine that they are in accordance with the acceptance criteria of subsection II.2.j of this SRP section. This includes review of the procedures used to consider the effect of fill settlement, including pipe profile and pipe stresses, and the differential movements at support points, penetrations, and anchors. Any procedures that are not adequately justified are so identified and the applicant is requested to provide additional justification. 3.9.2-23 DRAFT Rev. 3 - April 1996 k. Interaction of Other Piping with Category I Piping The criteria used to design the interfaces between Category I and non-Category I piping are reviewed to determine compliance with the acceptance criteria of subsection II.2.k of this SRP section. l. Criteria used for Damping The criteria used to account for damping in systems, components, equipment and their supports is reviewed to determine that it is in accordance with the criteria described in subsection II.2.l of this SRP section and where applicable, the damping values used are verified to conform with the regulatory position in Reference 9 Regulatory Guide 1.61, or ASME Code Case N-411 as supplemented by the regulatory position of Regulatory Guide 1.84.59 3. At the CP stage, the applicant should commit to performing an analysis of the vibration of the reactor internal structures if they are designated as a prototype design. A brief description of the methods and procedures to be used for the analysis should be provided. At the OL stage, a detailed dynamic analysis should be provided for a prototype