Document: NUREG-0800
Document ID: a09b1666-b289-4ea9-9e8f-3ee5fbd5bf41
Document Type: srp
Title: CONCRETE AND STEEL INTERNAL STRUCTURES OF STEEL OR
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1319/ML13198A250.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.3
CFR Part: 
CFR Title: 

Content:
sure-retaining envelope, will channel the steam through the venting doors and into the ice-condenser. The ice will condense the steam, thus minimizing the energy released to the containment. Following such a LOCA and before blowdown is complete, the divider barrier will be subjected to differential pressure and possibly jet forces. Any structural failure in its boundary may result in steam bypassing the ice-condenser and flowing directly into the containment, possibly generating a containment pressure higher than that for which it has been designed. With this functional requirement in mind, the review evaluates the general arrangement and principal features of the divider barrier with an emphasis on structural framing and expected behavior when subjected to the design loads. ii. Ice-Condenser A major feature of the ice-condenser containment are the baskets of ice forming the heat sink essential for pressure suppression. The structurally significant components of the ice-condenser reviewed are the vent doors, ice baskets, brackets, couplings and lattice framings, lower and upper supports, and insulating and cooling panels. The review evaluates the general arrangement and principal features of these major components, with an emphasis on the structural framing, supports, and expected behavior when subjected to design loads. C. Boling-Water Reactor (BWR) Containment Internal Structures This SRP section is oriented toward the BWR Mark III containment concept. Other BWR containment types are reviewed in a similar manner. The following major BWR containment internal structures are reviewed, together with the primary structural function of each structure and the extent of descriptive information required for each structure: i. Drywell In the BWR containment system, which uses the pressure-suppression concept, the drywell surrounds the reactor coolant system. The lower portion of the drywell is surrounded by the suppression pool which is bounded by the containment shell on