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:
a differential pressure and pos- sibly jet forces, and any structural failure in its boundary would result in steam bypassing the suppression pool and flow- ing 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 general arrangement and principal features of the drywell are reviewed with empha- sis on structural framing and expected behavior under loads. Since the drywell geometrically resembles, to a certain degree, a containment, the descriptive information reviewed is similar to that reviewed for containments as delineated in subsection I.1 of SRP Section 3.8.1. The major components of the drywell that are so reviewed, other than the main body of the drywell, include the bottom vent region, the roof and drywell head, and major penetrations. ii. Weir Wall The weir wall forms the inner boundary of the suppression pool and is located inside the drywell. It completely surrounds the lower portion of the reactor coolant system. The general arrangement and principal features of the weir wall are reviewed with emphasis on structural framing and behavior under loads. 3.8.3-4 Rev. 1 - July 1981 iii. Refueling Pool and Operating Floor The refueling pool walls 'are located on top of the drywell. The outer walls form a rectangular pool that is usually sub- divided by two interior crosswalls. The base slab of the pool is common to the drywell 'roof slab. The pool may be filled continuously with water for shielding purposes during operation. The general arrangement and principal features -of the refueling pool are reviewed with emphasis on structural framing and behavior under loads. The operating floor'is intended to provide laydown space for refueling operations and is usually a combination.of reinforced concrete and structural steel framining. The containment walls and the refueling pool walls may support the floor. The general arrangement and principal