Gamza dose rate readings at four inches distance Prom a plane surface
two {uohes in radius, is 1/40 that fron an equally contaminated infinite
field. (See Appendix D.)
Assume an object having a two-inch radius is contaminated om all sides
(but not rnecezsarily uniformly) so that the gamma dose rate is 1} tines
that from an equally contaminated surface whose area is equivalent to the
major crosc=sectional plane of the object.
one Row becomes sbout 1/27.
The fraction given in paragraph
Further asswne 6 1900/1 ratio for beta surface
dose rate to gamma dose rate at three feet above an infinite field.
the beta surface dose rate to gamma dose rate at four inches will be
2700/1.
DOE/NV
CLACCURIED
Unc!
ab ad
Then,
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