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:
location at which the meteorological atmospheric dispersion factor will result in the maximum beta and gamma air dose and the maximum total body and skin dose to an individual. ` Select data from this location for input to the GASPAR computer code. October 1999 5.4.2-5 NUREG-1555 (4) For liquid pathways, examine the receptor locations, hydrological data, and associated exposure pathways to select the location expected to result in the maximum individual dose input to the LADTAP computer code. (5) For the locations identified in Items 2, 3, and 4 above, assemble and enter the appropriate data needed to run the GASPAR and LADTAP computer codes. ` If input data needed by these codes are lacking and cannot be supplied, use default values (as provided in Regulatory Guide 1.109 [NRC 1976]) for these parameters. ` If either code is not sufficient because some important pathways identified by the reviewer for ESRP 5.4.1 are not included in the codes, employ special calculations. These calculations may involve the review of available literature and development of a model describing the pathway. (6) When site-specific conditions are so that it is not obvious that the particular location will result in maximum individual dose, select two or more locations for input to the GASPAR and LADTAP codes, then identify the “maximum” location based on the code outputs. (7) Do not analyze the doses resulting from the transportation of radioactive material unless the reviewers for ESRPs 3.8 or 5.4 indicate that an analysis of these pathways is needed. ` When this is the case, extend the analysis to cover these pathways, using an analysis and evaluation procedure developed in consultation with these reviewers. ` An analysis of occupational radiation exposure from the transportation of radiology materials is not required. (8) Analyze direct radiation doses to individuals in the vicinity of the site. During this analysis, evaluate the applicant’s estimates of doses from direct