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:
ondenser Containment Internal Structures For PWR plants where the ice-condenser containment system is utilized, in addition to the applicable structures reviewed in dry PWR containments, the following elements are also reviewed: i. The Divider Barrier In the PWR ice-condenser containment system, which utilizes the pressure-suppression concept, the divider barrier surrounds the reactor coolant system. The upper portion of the divider barrier is nearly surrounded by the ice-condenser which is bounded by the containment shell on the outside and by the divider barrier wall-on the inside. Several venting doors connect the space inside the divider barrier to the ice-condenser. In the event of a LOCA, the divider barrier will contain the steam released from the reactor coolant system and, temporarily acting as a pressure-retaining envelope, will channel the steam through the venting doors and into the ice-condenser. The ice will condense the steam and the energy released to the containment will thus be minimized. Following such a LOCA and before blowdown is completed, the divider barrier will be subjected to differential pressure and possibly jet forced, and any structural failure in its boundary may result in steam bypassing the ice-condenser and flowing directly into the containment, possibly generating a contain- ment pressure higher than that for which it has been designed. With this functional requirement in mind, the general arrangement and principal features of the divider barrier are reviewed with emphasis on structural framing and expected behavior when subjected to the design loads. ii. Ice-Condenser A major feature of the ice-condenser containment which contains 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 general