Document: NUREG-0800
Document ID: 57051ec2-9a01-488e-8294-573ed557f3eb
Document Type: srp
Title: GROUNDWATER
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070262.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.12
CFR Part: 
CFR Title: 

Content:
the turbine building to the 2.4.12-11 DRAFT Rev. 3 - April 1996 permanent dewatering system. In the event of a circulating water system pipe rupture outside of the turbine building, the applicant has stated that the results of an analysis predict that any additional water which will enter the dewatering system will be minimal, and normal groundwater levels will not be affected. The applicant initially proposed as a design basis for subsurface hydrostatic loads, groundwater levels at the elevation of the underdrain system. During our review, the applicant investigated the consequences of failures of some of the fluid-containing tanks and piping within the radius of influence of the permanent dewatering system. Consequences of some of those failures which could release fluids directly into or near the permanent dewatering system were analyzed by the applicant. The nuclear service water pipes will pass through the wall drain adjacent to the shield building. As described in Section 9.5.8 of this report, a moderate energy pipe crack within the wall drain would cause overflow of the sump and flooding of the auxiliary building floor and, in addition, would cause a localized elevation of water in the wall drain by about