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.
oecei rehash anne 4
contaminated sample ever received and caused a very considerable delay in the
urinalysis program.
A recheck on another sample from the same operator showed
only normal levels of activity.
Several conferences were held with representatives of CMR Division in
order to explain the present method of evaluating urinalyses for plutonium.
D,
Mercury
A survey was made to determine the extent of a possible mercury exposure
to K-4 personnel at Pajarito Canyon.
Mercury concentrations several times
permissible limits were found and recommendations made for pre installation.
Classification changed to
of a local exhaust hood.
by autherity
:
og
Per
S2—_vodiumLyerige
Sodium
Fydrid
aww
ZY
_U. S. E.R. Dor
.
(Yercon*au
one
in
pitication) oP
Croup CMR-6 has handled several woe
es
sodiGEE:“faring
period.
Sf
(gS 7P
(Signature of person makirg the change, end date)
This has been milled and blended with lithium hydride by the Powder
Metallurgy Section and, in the near future, it will be necessary to machine
pressed parts from this blend.
Sodium hydride is even more irritating than
lithium hydride and is more hazardous from a fire standpoint.
work is being done in dry boxes with an inert atmosphere.
Practically all
‘Sodium hydride col-
lects moisture rapidly until it forms a puddle on the floor of the dry box.
This makes the operation more difficult and increases the dermatitis problem.
ParticleTrajectory
Study
Further data has been obtained in the study of the trajectory of large
particles falling-in the vicinity of ap air sampler.
The data are now being
studied in an effort to generalize them to permit application to air pollution
studies.
Theoretical work on this problem is now being reviewed.
G,Miscellaneous Exposures
|
Recommendations were made for the proper method of machining hemispheres
made of potassium chloride, calcium fluoride, and sulfur at M-l Building.
&Se{
S&
oa
ae
An
“inspection was made of a Teflon welding operation in the main shop building
>
ers
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