Document: NUREG-0800
Document ID: f48fc6fe-7c52-4612-b75c-034cedcfeb13
Document Type: srp
Title: STEEL CONTAINMENT
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070325.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.2
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Structural Engineering Branch (SEB)Civil Engineering and Geosciences Branch (ECGB)1 Secondary - None I. AREAS OF REVIEW The following areas relating to steel containments or to other Class MC steel portions of steel/concrete containments, as applicable, are reviewed: 1. Description of the Containment a. The descriptive information, including plans and sections of the structure, is reviewed to establish that sufficient information is provided to define the primary structural aspects and elements relied upon to perform the containment function. In particular, the type of steel containment is identified and its structural and functional characteristics are examined. Among the various types of steel containments reviewed are: (i) Steel boiling-water-reactor (BWR) containments utilizing the 2 pressure-suppression concept, including the Mark I (lightbulb/torus), the Mark II (over/under), and the Mark III (with horizontal venting between a centrally located cylindrical drywell and a surrounding suppression pool). DRAFT Rev. 2 - April 1996 3.8.2-2 (ii) Steel pressurized-water-reactor (PWR) containments utilizing the 3 pressure-suppression concept with ice-condenser elements. (iii) Steel PWR dry containments. Various geometries have been utilized for these containments. The geometry most commonly encountered, however, is an upright cylinder topped with a dome and supported on either a flat concrete base mat covered with a liner plate or on a concrete foundation built around the bottom portion of the steel shell, which is an inverted dome. Although applicable to any geometry, the specific provisions of this SRP section are best suited to the cylindrical-type steel containment surrounded by a Category I concrete shield building. If containments with other types of geometry are reviewed, the necessary modifications to this SRP section are made on a case-by-case basis. (iv) Steel components of concrete containments that resist pressure and are