Document: 10 CFR Part 100
Document ID: 05b29e5b-8b5c-487a-b46f-49c687ddd11a
Document Type: cfr
Title: Determination of exclusion area, low population zone, and population center distance.
Source: 10 CFR Part 100
Source URL: https://www.ecfr.gov/current/title-10/part-100/section-100.11
Revision Date: 
Chapter: 
Section ID: 100.11
CFR Part: 100
CFR Title: 10

Content:
§ 100.11 Determination of exclusion area, low population zone, and population center distance. ( a ) As an aid in evaluating a proposed site, an applicant should assume a fission produce release [ 1 ] from the core, the expected demonstrable leak rate from the containment and the meteorological conditions pertinent to his site to derive an exclusion area, a low population zone and population center distance. For the purpose of this analysis, which shall set forth the basis for the numerical values used, the applicant should determine the following: ( 1 ) An exclusion area of such size that an individual located at any point on its boundary for two hours immediately following onset of the postulated fission product release would not receive a total radiation dose to the whole body in excess of 25 rem [ 2 ] or a total radiation dose in excess of 300 rem 2 to the thyroid from iodine exposure. ( 2 ) A low population zone of such size that an individual located at any point on its outer boundary who is exposed to the radioactive cloud resulting from the postulated fission product release (during the entire period of its passage) would not receive a total radiation dose to the whole body in excess of 25 rem or a total radiation dose in excess of 300 rem to the thyroid from iodine exposure. ( 3 ) A population center distance of at least one and one-third times the distance from the reactor to the outer boundary of the low population zone. In applying this guide, the boundary of the population center shall be determined upon consideration of population distribution. Political boundaries are not controlling in the application of this guide. Where very large cities are involved, a greater distance may be necessary because of total integrated population dose consideration. ( b ) For sites for multiple reactor facilities consideration should be given to the following: ( 1 ) If the reactors are independent to the extent that an accident in one reactor would not initiate an