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APPENDIX "B"
DRAFT LETTER TO JCAE, MLC AND GAC
1, The trend in thinking of the International Commission on
Radiation Protection, the National Committee on Radiation Protection, and the National Academy of Science is toward more restrictive criterla for standards of radiation protection.
2. In keeping with this philosophy the Atomic Energy
Commission has recently approved an additional restrictive
eriterion for exposure to gamma radiation from fallout to popula-
tions around the Nevada Test Site.
To the current criterion of
3.9 roentgens for any one year which will be retained, there will
be an additional restriction of 10 roentgens in a period of 10
years, with the first of the successive 10-year perlods starting
in the spring of 1951 (the date of the first nuclear series at
the Nevada Test Site).
3. These criterla are construed as operational guides
rather than maximum permissible limits since exposures somewhat
in excess of these values would not be considered hazardous.
~6-
Appendix "B"