‘WRakie
DELAYED SHUTTER STUDI®S$
In the delayed shutter exposures,
retinal burns,
6 of 16 rabbits sustained
The lesions were produced mostly in cases where the
exposure included the maximum or near maximum flux of the second pulse.
Increments of the flash beyond 0.6 seconds did not produce burns in
this event.
FILTER STUDTES ©
Burns produced behind filters at URIAH and VAN at 3.0 and 3.8
miles, respectively, were similar in size and appearance to blink
reflex lesions sustained on JAPTAN (DAVID) at 8.1 miles distance from
ground zero,
From this it is inferred that the filters reduced the
caloric dose and dose rate at URIAH and VAN to a level below that veto
could produce burns,
PROTECTIVE ELECTRONIC SHUTTERS
These shutters were inoperative at H hour due to a fire in the
wiring circuit at H -4 minutes,
With the grid mechanism fully open,
the shutter still reduces the incident visible light by about 60 percent.
As a first approximation it is estimated that the energy reaghing the
rabbit eye was effectively reduced
a
It is of interest that no lesions were produced in the animals
behind the protective shutters,
Within the limits imposed by the yield
threshold of burn production for this event lies between
Gea
CONCLUSTONS
The blink reflex time for animals and man is not sufficiently
a
rapid to protect against the flash from an atomic detonation |
on
koeSD/D98, ge
Het se
-~
17
-
Q