Document: NUREG-0800
Document ID: 808cea66-69b8-4f91-9fb2-62b3b99bc87a
Document Type: srp
Title: NUREG-0800
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340579.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3
CFR Part: 
CFR Title: 

Content:
ivalent static load on the structure generated by the reaction on the broken high-energy pipe during the postu- lated break, and including an appropriate dynamic load factor to account for the dynamic nature of the load. Y - Jet impingement equivalent static lbad on a structure generated by the postulated break, and including an appropriate dynamic load factor to account for the dynamic nature of the load. Y. - Missile impact equivalent static load on a structure generated by or during the postulated break, as from pipe whipping, and including an appropriate dynamic load factor to account for the dynamic nature of the load. In determining an appropriate equivalent static load for Y , Y., and Y. elasto-plastic behavior may be assumed with appropriate dut- ility ratios, provided excessive deflections will not result in loss of function of any safety-related system. For structures or structural components subjected to hydrodynamic loads resulting from LOCA and/or SRV actuation, the consideration of such loads should be as indicated in the Appendix to SRP Section 3.8.1 fluid structure interaction associated with these hydrodynamic loads and those from earthquakes should be taken into account. b. Load Combinations for Concrete Structures For concrete interior structures, the load combinations are acceptable if found in accordance with the following: (i) For service load conditions, either the working stress design (WSO) method as outlined in ACI 318 code or the strength design method may be used. (a) If the WSD method is used, the following load combinations should be considered: (1) D + L (2) D + L + E If thermal stresses due to T and R are present, the following combinations shoulB be algo considered: (3) D + L + To + Ro (4) D + L + T +,R + E 3.8.3-16 Rev. 1 - July 1981 - . Both cases of L having its full value or being completely absent should be checked. (b) If the strength design method is used, the following load combinations should be considered: (1) 1.4D + 1.7L