UNCLASSIFIED
NDL-TR-11
-
METHOD OF EVALUATION OF EXPERIMENTAL MEASUREMENTS OVER
A RECTANGULAR SOURCE (U).
J. L. Meredith, April 1961.
UNCLASSIFIED
(u)
Deta analysis of field radiological decontamination tests
involve evaluation of detector response over finite test areas.
A method
of calculation is derived for the theoretical detector response over a
rectangular source by numerical integration of the function aA/re » Where A
is the source area and r is the distance between an element of source area
and the detector.
Numerical results for rectangle of dimensions of
20 X 100 feet and detector height of three feet are presented.
Effects
of uneven distribution of contaminant over source area are considered and
method of statistical analysis of data is derived.
NDL-~TR-12
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NEUTRON FLUX MEASUREMENTS OF THE TRIGA MARK F REACTOR (u).
J. H. McNeilly and J. W. Kinch, September 1961.
os
UNCLASSIFIED
(U)
Tre neutron environment of the Triga Mark F Reactor was
determined by using the neutron threshold detector system.
A total of-
107 measurements were made resulting in 562 separate neutron flux
determinations.
This report contains the results of the measurements
and a description of the experimental procedure.
An appendix is also included which presents neutron flux data obtained from the Triga Mark I
Reactor during April 1959 and on 12 October 1960.
NDL-TR-15
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RECENT DEVELOPMENTS IN THE NEUTRON ACTIVATION THRESHOLD
DETECTOR SYSTEM AS USED BY THE U. S. ARMY NUCLEAR DEFENSE
LABORATORY (U).
Jd. H. McNeilly and J. W. Kinch, September 1961.
UNCLASSIFIED
(U)
Tais report describes an experimental investigation of uranium-235,
magnesium, and aluminum as activation-type neutron detectors and the
calibration of recently installed automatic counting equipment used with
the threshold detector system.
As a result of the investigation, uranium-235, magnesium, and
aluminum Lave been added to the threshold detector system.
Uranium-~235
{threshold of 1.5 Kev) provides another energy band in the low energy
portion of the spectrum and magnesium and aluminum (thresholds of 6.3 Mev
and 8.1 Mev, respectively) provide two more energy bands at the high
energy portion of the spectrun.
UNCLASSIFIED
av Bi, “4