Document: NRC Regulatory Guide
Document ID: 2e29f931-cdf2-4faa-a9e4-5d7cb237e57f
Document Type: regulatory_guide
Title: Service Limits and Loading Combinations for Class 1 Plate-and-Shell-Type Component Supports + HISTORY – HISTORY 10/2006 – DG-1169 , Proposed Revision 2
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0630/ML063000484.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.130
CFR Part: 
CFR Title: 

Content:
ned by the linear-elastic-analysis method should not exceed the service limits of NF-3522 and NF-3622 of Section III and Regulatory Position 2. b. Component supports designed by the load-rating method should not exceed the load rating for level C limits of NF-3280 of Section III. c. Component supports designed by the experimental-stress-analysis method should not exceed the test collapse load determined by II-1430 of Section III and divided by 1.3. 5. The design of component supports subjected to the combined loadings of (1) the vibratory motion of the SSE, (2) the system mechanical loadings associated with the normal plant condition, 4 and (3) the dynamic system loadings associated with the faulted plant condition should adhere to the following design limits, 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 6 then applies):5,6 a. Component supports designed by the linear-elastic-analysis method should not exceed the service limits of F-1332 of Section III. b. Component supports designed by the load-rating method should not exceed the value u u u of TL x 0.7 S /S , where TL and S * are defined according to F-1332.7 of Section III * u and S is the ultimate tensile strength of the material at service temperature. c. Component supports designed by the experimental-stress-analysis method should not exceed the test collapse load determined by II-1430. d. If plastic methods are used for the design of component supports, the combined loadings of Regulatory Position 5 should include loads such as constraints of free-end displacements. The design should not exceed the service limits of F-1340 of Section III. 6. The design of component supports in systems for which the normal function is to prevent or mitigate the consequences of events associated with an emergency or faulted plant condition should adhere to the limits described in Regulatory Position 3