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:
pplicable to early site permit applications. ` 10 CFR 20.1301(d) with respect to exposure pathways. Regulatory positions and specific criteria necessary to meet the regulations identified above are as follows: October 1999 5.4.1-5 NUREG-1555 ` Regulatory Guide 1.109, Rev. 1, Calculation of Annual Doses to Main from Routing Releases of Reactor Effluents for the Purpose of Evaluating Compliance with CFR 50, Appendix I (NRC 1976), with respect to calculating individual and population doses from routine effluents Technical Rationale The technical rationale for evaluating the applicant’s exposure pathways is discussed in the following paragraph: To adequately evaluate the radiological impact of radiological releases from a light-water-cooled reactor, the exposure pathways, including receptor locations, should be determined. Receptor locations include areas having populations such as schools, hospitals or residences, or they may be locations at which plants or animals that become food for the public may be exposed to either direct radiation or contamination. Parameters necessary to determine the exposure pathways to calculate the dose (in Section 5.4.2) include the population of the affected area (assumed to be within an 80-kilometer [50-mile] radius), the distance from the reactor to the receptor location, and the time required for the plume to reach the receptor locations. In some cases, realistic assumptions should be made to determine the exposure pathways. All the assumptions used in determining the exposure pathways should be documented. This collection of information forms the basis for calculating doses to individuals from routine releases of reactor effluents so they can be compared to the guidelines for releases in 10 CFR 50, Appendix I. III. REVIEW PROCEDURES In this analysis, the reviewer should identify potential pathways for the transfer of radioactive materials from the plant or plant effluent streams to individuals. The analysis should consist of two