Document: NUREG-0800
Document ID: 48fb37ec-8e3e-4c2c-96c3-daa5e7da62f9
Document Type: srp
Title: of the applicant's SAR is reviewed to identify any missing data,
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340557.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.12
CFR Part: 
CFR Title: 

Content:
reflect any potential future changes which can be induced by variations in precipitation, construction of future wells and reservoirs, accidents, pipe failures, or other natural events. For dewatering systems, calculations are performed to determine phreatic surfaces, normal flow rates, flow rates into the system as a result of.pipe breaks 2. 4.12-3 Rev. 2 - July 1981 (circulating and service water system pipes), groundwater rebound times assuming total failure of the system, and system capacity. The above reviews are performed only when applicable to the site or site region. Some items of review may be done on a generic basis. IV. EVALUATION FINDINGS For construction permit (CP) reviews, the findings will summarize the applicant's and staff's estimates of groundwater levels associated with safety-related struc- tures and, where applicable, groundwater flow directions, gradients, velocities, effects of potential future use on these parameters, and applicability and reliability of dewatering systems. If the design bases estimates are comparable, I staff concurrence in the applicant's estimates will be stated. If the staff predicts substantially more conservative groundwater conditions and the proposed plant may be adversely affected, a statement of the staff bases will be made. If groundwater conditions do not constitute design bases, the findings will so indicate. For operating license (OL) reviews of plants that have had detailed groundwater reviews at the CP stage, the CP conclusions will be referenced. In addition, a review of groundwater history since the CP review will be indicated and note of any changes in groundwater conditions or usage will be.made. For permanent dewatering systems, any additional information regarding soil properties and groundwater conditions gathered during construction will be evaluated to deter- mine the applicability of the assumed CP design basis. If no CP groundwater review was undertaken, of the scope indicated above, this fact