Document: NRC Regulatory Guide
Document ID: 1d715751-9321-4481-a46f-4ff802a5efe0
Document Type: regulatory_guide
Title: Service Limits and Loading Combinations for Class 1 Linear-Type Supports + HISTORY – HISTORY 10/2006 – DG-1168 , Proposed Revision 2
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0630/ML063000449.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.124
CFR Part: 
CFR Title: 

Content:
NF-3341.1(a) of Section III should not be less than that required to support a factored load equal to 1.3 times that of the Service Level C limit for component supports designed by the limit analysis method. d. Component supports designed by using the experimental stress analysis method should not exceed the test collapse load determined by II-1400 of Section III divided by 1.3. DG-1168, Page 8 6. The limits in Regulatory Positions 6a – 6d should apply to the design of component supports subjected to the combined loadings of (1) the system mechanical loadings associated with the normal plant condition, (2) the vibratory motion of the SSE, and (3) the dynamic system loadings associated with the faulted plant condition, except when the normal function of the supported system is to prevent or mitigate the consequences of events associated with the faulted plant condition (Regulatory Position 7 then applies). a. Component supports designed by using the linear-elastic-analysis method should not exceed the stress limits of NF-3320 of Section III and Regulatory Position 2 of this guide, increased according to the provisions of F-1334 of Section III and Regulatory Position 3. b. Component supports designed by using the load-rating method should not exceed the lesser value of TL x 2Fall/Su* or TL x 0.7 Su/Su*, where TL, Su, and Su* are defined in F-1332.7 of Section III and Fall is the allowable stress value defined in NF-3382.1. c. Component supports designed by using the limit analysis method should not exceed the lower bound test collapse load determined by NF-3340, adjusted according to the provision of F-1334.6(a). d. Component supports designed by using the experimental stress analysis method should not exceed the test collapse load determined by II-1400, adjusted according to the provision of F-1334.6(c). 7. The limits in Regulatory Position 4 or other justifiable limits provided by the ASME Code should apply to the design of component supports in systems for which