Document: NUREG-0800
Document ID: 0c49d5f5-63ea-428c-831c-9e32e79e6bd3
Document Type: srp
Title: GROUNDWATER
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:
nced. For SAR Section 2.4.12.3: The need for and extent of procedures and measures to protect present and projected groundwater users, including monitoring programs, must be discussed. These items are site-specific and will vary with each appli- cation. To meet the requirements of 10 CFR Part 50, §§50.55 and 50.55a; General Design Criteria 2, 4, and 5; 10 CFR Part 100; and 10 CFR Part 100, Appendix A, the following specific criteria are used: For SAR Section 2.4.12.4: The design bases (and development thereof) for groundwater-induced loadings on subsurface portions of safety-related structures, 2.4.12-2 Rev. 2 - July 1981 systems, and components must be described. If a permanent dewatering system is employed to lower design.basis groundwater levels, the bases for the design of the system and determination of the design basis for groundwater levels must be provided. Information must be provided regarding (a) all structures, com- *ponents, and features of the system, (b) the reliability of the system as related to available performance data for similar systems used at other locations, (c) the various soil parameters (such as permeability, porosity, and specific yield) used in the design of the system, (d) the bases for determination of groundwater flow rates and areas of influence to be expected, (e) the bases for determination of time available to mitigate the consequences of system failure where system failure could cause design bases to be exceeded, (f) the effects of malfunctions or failures (such as a single failure of a critical active component or failure of circulating water system piping) on system capacity and subsequent groundwater levels, and (g) a description of the proposed groundwater level monitoring program and outlet flow monitoring program. Specific criteria relating to the design of permanent dewatering systems are presented in the attached Branch Technical Position HGEB-1, "Safety-Related Permanent Dewatering Systems." In addition, if wells are