Document: NUREG-0800
Document ID: ab4f353d-c299-479d-ab25-834f97196988
Document Type: srp
Title: CONCRETE AND STEEL INTERNAL STRUCTURES OF STEEL OR CONCRETE
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070326.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.3
CFR Part: 
CFR Title: 

Content:
tructures for Nuclear Power Plants 3.8.3-17 DRAFT Rev. 2 - April 1996 3. Loads and Load Combinations a. With the exception of the divider-barrier and ice-condenser elements of the 78 ice-condenser PWR containment and the drywell of the BWRMark III79 containment, the loads and load combinations for all other containment interior structures described in subsection I.1 of this SRP section are acceptable if found in accordance with the following: ai. Loads, Definitions, and Nomenclature 80 All the major loads to be encountered or to be postulated are listed below. All the loads listed, however, are not necessarily applicable 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, including any permanent equipment loads and hydrostatic loads. For equipment supports, this 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. Alternate load cases should be investigated, as appropriate, in which the magnitudes and locations of the live loads are arranged so that worst-case conditions are included in the design.81 T - Thermal effects and loads during normal operating or o shutdown conditions, based on the most critical transient or steady state condition. R - Pipe reactions during normal operating or shutdown o conditions, based on the most critical transient or steady state condition. Severe environmental loads include: E - Loads generated by the operating basis earthquake. DRAFT Rev. 2 - April 1996