Document: NUREG-0800
Document ID: 786da65a-4915-4af3-afb3-678b7df5bea7
Document Type: srp
Title: OTHER SEISMIC CATEGORY I STRUCTURES
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070327.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.4
CFR Part: 
CFR Title: 

Content:
, and Components Installed in LWR Plants 3.8.4-9 DRAFT Rev. 2 - April 1996 3. Loads and Load Combinations The specified loads and load combinations are acceptable if found to be in accordance with the following: a. Loads, Definitions, and Nomenclature All major loads to be encountered or to be postulated are listed below. All loads listed, however, are not necessarily applicable to all the structures and their elements. Loads and the applicable load combinations for which each structure has to be designed will depend on the conditions to which that particular structure may be subjected. Normal loads, which are those loads to be encountered during normal plant operation and shutdown, include: D - Dead loads or their related internal moments and forces, including any permanent equipment loads. L - Live loads or their related internal moments and forces, including any movable equipment loads and other loads which vary with intensity and occurrence, such as soil pressure. The dynamic effects of lateral soil pressure should be accounted for in accordance with the provisions of Appendix G to this SRP section.44 T - Thermal effects and loads during normal operating or shutdown 0 conditions, based on the most critical transient or steady state condition. R - Pipe reactions during normal operating or shutdown conditions, 0 based on the most critical transient or steady state condition. Severe environmental loads include: E - Loads generated by the operating basis earthquake. W - Loads generated by the design wind specified for the plant. Extreme environmental loads include: E' - Loads generated by the safe shutdown earthquakeSSE.45 W - Loads generated by the design tornado specified for the plant. t Tornado loads include loads due to the tornado wind pressure, the tornado-created differential pressure, and tornado-generated missiles. DRAFT Rev. 2 - April 1996 3.8.4-10 Abnormal loads, which are those loads generated by a postulated high-energy pipe break accident, include: P