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:
ed in Technical Information Document 14844 may be used as a point of departure for consideration of particular site requirements which may result from evaluation of the characteristics of a particular reactor, its purpose and method of operation. [ 27 FR 3509 , Apr. 12, 1962, as amended at 31 FR 4670 , Mar. 19, 1966; 38 FR 1273 , Jan. 11, 1973; 40 FR 8793 , Mar. 3, 1975; 40 FR 26527 , June 24, 1975; 53 FR 43422 , Oct. 27, 1988; 64 FR 48955 , Sept. 9, 1999; 67 FR 67101 , Nov. 4, 2002] Footnotes - 100.11 [ 1 ] The fission product release assumed for these calculations should be based upon a major accident, hypothesized for purposes of site analysis or postulated from considerations of possible accidental events, that would result in potential hazards not exceeded by those from any accident considered credible. Such accidents have generally been assumed to result in substantial meltdown of the core with subsequent release of appreciable quantities of fission products. [ 2 ] The whole body dose of 25 rem referred to above corresponds numerically to the once in a lifetime accidental or emergency dose for radiation workers which, according to NCRP recommendations may be disregarded in the determination of their radiation exposure status (see NBS Handbook 69 dated June 5, 1959). However, neither its use nor that of the 300 rem value for thyroid exposure as set forth in these site criteria guides are intended to imply that these numbers constitute acceptable limits for emergency doses to the public under accident conditions. Rather, this 25 rem whole body value and the 300 rem thyroid value have been set forth in these guides as reference values, which can be used in the evaluation of reactor sites with respect to potential reactor accidents of exceedingly low probability of occurrence, and low risk of public exposure to radiation.