CHAPTER I!, SECTION 3
fa
ny
ag
=r
re
Figure 2-37.
STATION:
PURPOSE:
SITE:
Station 22 - 83% Complete
23
Ground Zero
. Irene
USER:
LASL
CONSTRUCTION: 12-17-55/4-26-56
This station consisted of two steel tanks,
one inside the other. The inner tank, made of
5/16” boiler plate, was 15’ in diameter, approximately 15’ high and was watertight. The outer
tank was 50’ in diameter and approximately 30’
high so as to maintain 10’ of water over the inner
tank. The outer tank required a 1/4” thick
welded steel plate floor. A heavy structural
steel tunnel equipped with watertight doors connected the inner and outer tanks. Thefloor of
tons was required for a lead shield located within
the outer tank. Six three-inch I. D. pipes used
as collimators in connection with Station 1612
and a tapered rectangular pipe used in connect-
ion with collimation of Program 12 detectors
were connected between the inner and outer
tanks. Three runs of project-furnished Am-
phenol RE 57 U cable and eleven runs of co-
axial cable terminated in Station 1611. A 14’ x
14’ tent and 6’ x 8’ wooden building for housing
vacuum pump equipment and instruments were
erected outside of the outer tank.
the tunnel was capable of carrying a movable
Settlement of the station was critical. A
special soil investigation led to the decision that
the Station should be supported on a concrete
mat and that the outer tank and access tunnel
should be filled with water to ensure settlement
the outer tank with sea water within six hours.
equipment. With the mat founded on compacted
two-ton load. Means were provided for flooding
The inner tank was equipped with a revolv-
taking
place
prior
to
the
installation
of
soil and the tank empty, a bench markelevation
ing bridge crane with a hook height of 12 feet
above the floor and a hoist capacity of 2 tons.
was established 150 feet away, and initial elevations at the quadrants of the mat were deter-
foundation to the smaller tank. To exhaust this
hours while filling the tank and continued thereafter until the settlement was 1/1000 of a foot
An air intake was run under the large tank
air, a vent pipe was extended above the waterline of the outer tank and turned down 180
degrees to within eight inches of the waterlevel.
A foundation capable of supporting 100
Page 2-54
mined. Settlement readings were taken every 12
in that period of time. Thereafter, the readings
were taken every 24 hours until settlement
was constant, at which time the tank was
emptied. Readings were taken while the tank