ORNL-1816 - the Molten Salt Energy Technologies Web Site

The Monte Carlo method was used for two calcu-
lations: the penetration of gamma rays through
composite slab shields and the heating in beryllium
slabs resulting from gamma rays in an adjacent
source, In addition, a three-parameter mathematical
formulation of the variation of radiation-induced
injury to pilots of nuclear-powered aircraft with
time after exposure was derived, and analyses
were made of the preliminary differential experi-
ments and of the first experiments with the GE-ANP
R-1 reactor shield mockup at the Tower Shielding
Facility (TSF).
SLANT PENETRATION OF COMPOSITE
SLAB SHIELDS BY GAMMA RAYS
C. D. Zerby
A Monte Carlo calculation of the penetration of
gamma rays through the side of a crew-compartment
shield has been completed. The study was ex-
2-mOc2 Photons Transmitted Through Composite
Slabs of Polyethylene Backed by Lead.
12 SHIELDING ANALYSIS
E. P. Blizard
F. H, Murray C. D. Zerby
Physics Division
H. E. Stern
Consolidated Vultee Aircraft Corporation
S. Auslender
Pratt & Whitney Aircraft
tended to include an investigation of the effect of
the variation of the parameters involved so that
the penetration of any complex spectrum of incident
gamma-ray flux could be determined by integration
of the resulting data. Results of a calculation with
one set of boundary conditions were given pre-
viously,' and summary tabulations of the results,
are available. 2
The results are presented graphically in Figs.
12.1 and 12.2 as the fraction of incident energy
penetrating composite slabs. The exponential
'C. D. Zerby, ANP Quar. Prog. Rep. Sept, i!O, 1954,
ORNL-1771, p 157.
2C. D. Zerby, Preliminary Report on the Penetration
of Composite Slabs by Slant Incident Gamma Radiation,
ORNL CF-54-9-120 (Sept. 21, 1954).
2
f .O
n
w I-
k
2 0.5
z
a Lz +
>.
p 0.2
w z w
b 0.1
z
o_
+
2 0.05
E
0.02
n _._. nc
UNCLASSIFIED
7-01-0.59-9 - . .._
0 0 2 0.4 0 0.2 0.4 0 0.2 0.4
LEAD THICKNESS (in.)
6-mOc2 Photons Transmitted Through Composite
Slabs of Polyethylene Backed by Lead.