Memo from To: John Totter
JOSHUA LEDERBERG

eR i 8 1971 BET

Population exposure to radiation.

Dr. Seaborg's 3/22 speech refers to a level
of a microrem per year, calculated from eth

boundary( site|constraints.

Does this calculation include reference to.
water-borne contamination? To R¥XK Rulison etc.
sources of atmospheric tritium?

If not, are there comprehensive calculations
of the total load from peaceful applications of
nuclear energy? (I suppose medical uses of iso-
topes would be a significant part of that load,

and should be factored out.)

ee, ,
~“

 

PROFESSOR JOSHUA LEDERBERG
Department of Genetics
School of Medicine

Stanford University
Stanford, California 94305