Gea RB on ne, hdl Wt ee tt a
y closed
Upen arrival at HASL,
The entire sample
y
con=
Our
.
..
oa
ae
eT
OTAL GAMMA AND GAMMA SPECTRUM MEASUREMENTS
ward of
ht dis-
me:
. ot andl tone ahead Matt EBS cua chon a et ht ar Rly ced SealdPsnalte,
et
RE
adele
the filters are coded,
(or a representative
logged and quartered.
fraction if the activity is too
high)
is folded and placed in a plastic box, 8 cm x 6.5 cm x 3.1 cm
deep,
for gamma spectrometric analysis on an 8" x 4" NaI
(Tl)
crystal.
The total gamma activity is integrated between 100 Kev and 3.0 Mev,
and the gamma concentration is reported as counts per minute
100 SCM on the counting date.
(cpm)
per
The complex spectrum is then submitted
for computer resolution by least squares fitting into its component
members.
RAD ITOCHEMICAL ANALYSIS
Based upon the gamma measurements,
ti-~
fractions of the filters are
combined into appropriate composites which are sent to contractor laboratories for detailed radiochemical analyses including the following
nuclides:
3/8")
Fe-55
Sr-89
2r-95
Ce-141
Sr-90
Ce-144
At the present time,
Richmond,
Pb-210
Po-210
Pu-238
Pu-239,240
Trapelo Division/West formerly Tracerlab of
California is performing these analyses.
Nuclide concentra-
tions from radiochemical analyses are reported as picocuries per 100
standard cubic meters of air
(pCi/100 SCM)
1ng a previously established practice,
at collection time.
Fe-55 is decay corrected to
Ir - ll
*, %
SO ee ng
Follow-
: