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:
Code design condition or the normal or upset plant conditions, and (2) the vibratory motion of the OBE.5, 6 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 (above). b. Component supports designed by using the load-rating method should not exceed the Service Level A or B load rating of NF-3382 of Section III. c. The lower bound test collapse load determined by NF-3340 and adjusted according to the provision of NF-3341.1(a) of Section III should not be less than that required to support a factored load equal to 1.7 times those of the Service Level A and B limits 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 1.7. 5. The limits in Regulatory Positions 5a – 5d should apply to the design of the component supports subjected to the system mechanical loadings associated with the emergency plant condition, except when the normal function of the supported system is to prevent or mitigate the consequences of events associated with the emergency plant condition (Regulatory Position 7 then applies).6, 7 a. Component supports designed by using the linear-elastic-analysis method should not exceed the stress limits of NF-3320 and Regulatory Positions 2 and 3, increased according to the provisions of NF-3321.1(a) of Section III and Regulatory Position 3. b. Component supports designed by the load-rating method should not exceed the Service Level C load rating of NF-3382.2 of Section III. c. The lower bound test collapse load determined by NF-3340 and adjusted according to the provision of 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