~14this period, and (2) at no place is the dose so high that it cannot
be protected against.
A frame house affords a protection factor of
about two, a basement about ten.
Dr. Scoville presented a table of estimated areas for various
doses in different types of terrain.
The extreme entries were as
follows for the integrated dose from a 15 MT shot at H } 2 days,
in rural
in epen
areas
in average
in city
shelter in city
2100 eq.. mi.
205 r
8800 sq. mi,
7500 sq. mi.
630 r
1,600
3500
320
The next effects item was atomic weapons for air defense.
For
& 2 KT burst at 40,000 ft the 2000 and 5000 rem radii are greater
than the maximum lethal gust radius.
The 2000 rem radius is about
ee
i506
yas—The relative contribution of nuclear radiation effects
changes markedly with altitude.
The preliminary estimates of effects
on ballistic missiles are discouragingly small,
For the next topic, Capt. John H. Lofland, USN, who was present
WIGWAM
Test
during part of Dr. Scoville's talk, discussed the WIGWAM test, planned
for the middle of May, 1955,
This wi
be an underwater effects test
ae
at deep submergence.
A 31 KT
depth in 12,000 ft of water.
will be detonated at 2000 ft
The test will take place about 315 miles
west and southwest of San Diego.
Three submarines will be at 250 ft
depth in order to obtain information on maximum lethal range against
submerged targets (expected to be 6500-1e,000 ft).
These vessels will
4
/o
ay