~
TCIR - 562
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~- A SURVEY ON RW CLOTHING DECONTAMINATION.
John A. Pierce, Jr., 18 May 1950.
SECRET
Radiological centers at Oak Ridge, Los Alamos, San Francisco,
Hanford, and Mound Laboratory utilize prelaundering segregations and
laundering techniques appropriate to the clothing decontamination problems
peculiar to each installation.
Because the type of contamination varies
among these installations, none of their laundering formulas or cycles is
recommended as optimum.
This report summarizes the techniques employed at
these laboratories, and describes 9 formilas employed by Quartermaster Corps
laundries for nonradioactive washing.
Three specific recommendations are made:
(1)
If radioactivity
persists after 3 decontamination cycles, the garment should either be stored
to permit natural decay to reduce contamination, or it should be buried.
(2) Quartermaster Corps should use impregnated clothing for its 1950 field
test at ORNL.
(3)
Six QM washing formulas have merit and should be
considered for use by field-decontamination stations.
Specifically not
recommended is a study of the decontamination of various fabric types, both
because of the difficulty of standard procurement and because the possible
additional salvage value of contaminated clothing would not warrant the-
expense.
TCIR - 572
- APPARENT THERMAL CONDUCTIVITY OF GRANULAR RADIOLOGICAL AGENTS.
G. L. Priest, H. F. Priest, and R. Alvarez, 12 July 1950.
SECRET-RESTRICTED DATA
This report describes a satisfactory method for measuring the
apparent thermal conductivity of granular tantalum and other granular,
candidate, radioactive materials. Results, estimated as accurate to within
td
5%, indicate that the thermal conductivity of a granular material is approxi-
;
mately 1% of that of the corresponding solid.
nant.
:
:
.
.
The apparatus consists of a steam- jacketed, cylindrical, brass
shell having a length at least four times its diameter and a wall thickness
of 0.015 in.
le
A carefully constructed, butt-jointed thermocouple is exactly
centered under tension in the tube.
Measurement is made of the flow of heat
through the granular mass by periodic galvanometer readings until the
indicated temperature at the middle of the cylinder equals that of the steam.
These readings are plotted against time, and values are obtained from the
7
resulting time-temperature relationship which permit the calculation of
thermal diffusivity by the use of Waddam's equation.
Thermal conductivity
is then determined from the average value of thermal diffusivity by
appropriate calculation.
RES
ATO
A
Y ACT - 1954
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