ZUNT)
Project 2.71 - Relative
rtance of the Various Radiation Sources
to the Ship Shieliing Problem - AH. fh. Rinnert
OBIE *<ivss
To determin: the relative raitation dzse rates contributed by
contamination of the air envelope, water envelope, ani the ehip's
weather surfaces.
Te determine the time jepenient gamm ray combined absorption
ani seatter'ng coefficients of steel to be used in future calcwlationa
of shielding effectiveness,
To fleld test new an] Lap-oved ietector systems.
To obtain gamma ratiaticn measur monte at warious points oa and
in the 3hip as a function of time for the following purposes:
Mheek point- for Suture shielding calculations,
Deteraination of the radiological situation at various
locations aboard ship for Projects 2.€3 ani 2.19, te be used for
operational control of the test shica,
List MT ATION
YAS-40 receivei enough contanination to supply data to satisfy
all objectives.
Only YAC-+Y0 data have been reduced +o date.
Tne ine
strumenvation perforne)] au icfactva: ily.
Relat
iG?
RESULTS
Radiation Fielis Contrimied
Various |
S7ursos
"Free fiel i" meaasucerents were compari, these Sree Clelds «rz
defined as follows:
Water frec Tleld - 4 pi railucion field at a water
depth of between 20 an! 30 feat: Air free Field = 2 pi raidation field
BEST AVAILABLE COPY
-~ 50 =
was
S2A&G