Document: NUREG-0800
Document ID: 04c894f5-e3ab-479e-8bca-0722777c79a7
Document Type: srp
Title: Revision 4 – January 2016
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1502/ML15027A401.pdf
Revision Date: 2023-06
Chapter: 11
Section ID: 11
CFR Part: 
CFR Title: 

Content:
e of Water - This scenario assumes both direct and indirect water use. In such an instance, the scenarios would be modeled separately and the resulting doses would be summed up and compared to the SRP acceptance criteria. For the purpose of the consequence analysis, the point of entry in unrestricted areas is defined as a location beyond the site boundary where the applicant has no administrative controls that could be used to restrict the use of surface water or groundwater resources, or require the treatment of surface water or groundwater for use as finished drinking water. When considering surface water resources, the selected point of entry in unrestricted areas should be identified as that location in a surface water body or stream affected only by near-field dilution near the point of entry. Modeling approaches that assume the effects of far-field dilution or turbulent mixing will not be acceptable to the staff as such assumptions are expected to result in excessively high and non-conservative dilution factors. In instances where far-field dilution and turbulent mixing are the only processes by which accidental releases are dispersed in the environment, the applicant should provide a justification for this approach and sufficient information to enable the staff to conduct an independent evaluation of the proposed dispersion processes. For groundwater resources, the applicant should assume the presence of a hypothetical well located at a nearby distance from the site boundary and depth within an aquifer, where the effects of groundwater hydraulic gradient, recharge properties, and velocity are suitable for groundwater contamination, would be acceptable in characterizing radionuclide concentrations in groundwater. As before, groundwater modeling approaches that result in excessively high and non-conservative dilution factors will not be acceptable to the staff. Finally, the consequence analysis may not take credit for the use of typical water supply system