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:
t necessarily applic- able to all the interior structures. Loads and the applicable load combinations for which each structure has to be designed will depend on the conditions to which that particular structure could 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, inluding any permanent equipment loads and hydrostatic loads. For equipment supports, it also includes static and dynamic head and fluid flow effects. L - Live loads or their related internal moments and forces, including any movable equipment loads and other loads which vary with intensity and occurrence. For equipment supports, it also includes loads due to vibration and any support movement effects. To - Thermal effects and loads during normal operating or shutdown conditions, based on the most critical transient or steady state condition. R. - Pipe reactions during normal operating or shutdown conditions based on the most critical transient or steady state condition. Severe environmental loads include: E - Loads generated by the operating basis earthquake. Extreme environmental loads include: El - Loads generated by the safe shutdown earthquake. Abnormal loads, which are those loads generated by a postulated high-energy pipe break accident, include: Pa - Pressure equivalent static load within or across a compartment generated by the postulated break, and including an appropriate dynamic load factor to account for the dynamic nature of the load. 3.8.3-15 Rev. 1 - July 1981 : Ta - Thermal loads under thermal conditions generated by the postulated break and including To. Ra - Pipe reactions under thermal conditions generated by the postulated break and including Ro. Y. - Equivalent 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