Document: NUREG-1555
Document ID: 68f32ac9-8d1d-4243-8e32-3aa120bfd4e5
Document Type: esrp
Title: EXPOSURE PATHWAYS
Source: NUREG-1555
Source URL: https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1555/initial/
Revision Date: 2007-10
Chapter: 5
Section ID: 5.4.1
CFR Part: 
CFR Title: 

Content:
ta are not conservative or if subsequent dose-estimations calculations and analyses made by the reviewers of ESRPs 5.4.2 and 5.4.3 predict that doses will exceed the 10 CFR 50, Appendix I, guidelines, request that the reviewer of ESRP 2.3.1 provide detailed hydrological dispersion factors. ` As needed, provide assistance to the reviewer of ESRP 2.3.1 to complete this interrelated portion of the environmental review. Pathways for Overall Dose To identify pathways that will be used to calculate the overall dose estimate, take the following steps: (1) Refer to the information identified in the “Data and Information Needs” of this ESRP. ` Base the review on information supplied by the applicant and supplemented by information obtained during the site visit, consultation with appropriate ESRP Chapter 2.0 reviewers, and consultation with appropriate Federal, State, regional, local, and affected Native American tribal agencies. ` Using these data, develop the appropriate exposure pathways, and document all assumptions. ` Obtain assistance from and coordinate with the reviewer of ESRPs 2.3.1, 2.7, and 3.5 in the same manner as described for the review of maximum individual dose pathways. (2) Ensure that the analysis of exposure pathways has resulted in the following identifications and determinations: ` the locations of all important receptors ` the important exposure pathways to each receptor ` atmospheric transport and diffusion calculations (by the reviewer for ESRP 2.7) at each appro- priate receptor location ` effluent release points, transit times to unrestricted area boundaries, and diluted stream flows at these boundaries (to be verified by the reviewer for ESRP 3.5). Note: For early site permit applications, certain assumptions may need to be made regarding effluent release points. NUREG-1555 5.4.1-10 October 1999 ` transit times and dilution factors at each appropriate receptor location (to be verified in consulta- tion with the reviewer for ESRP 2.3.1) `