ORNL-1771 - Oak Ridge National Laboratory

ANP QUARTERLY PROGRESS REPORT
0 30 beg
d-zdft
p = a5 2 cm
a = 30 aeg
CFNTCR OF -RIPLEI BF3 CHAbABCR AT
x = SEE 4B7b In IRCN @ALL A- x= -" 5 ern'
y= 79 6 cm
1-@3cm
I
La-- -~ 1 -
0 24 48 75 96 I20 44@ 168 192
h AlTlTUDE (ftl
fig. 14.3. Variation of Scattered taeka~ari Flux
with Altitude.
TSH. Thermocouple measurements of the bulk
water temperature in the 12-ft-dia renctor tank
are made while the water is being stirred suf-
ficiently to ensure that no significant difference
in temperature exists throughout the tank. The
rate of temperature rise of the water when the
reactor is started is then proportional to the power
of the reactor. Small corrections must be made
for the power input due to the mixing and for the
heat loss.
This procedure was first used for a 5 by 6 fuel
element loading in the TSR. The reactor tank
wos lowered into the drained handling pool, and
four mixers were placed nt various positions within
the tank. The turbulence created by the mixers
was sufficient for thorough mixing of the water,
but the power added by the mixers was not enough
to give a measurable increase of the water temper-
ature. Before the reactor was started, the temper-
1 78
ature remained constan1 for more than 1 hr with
the mixers running.
Some heat insulation was obtained by creating,
with a double layer of canvas, a dead-air space
above the water and nrnund the reactor tank. The
temperature rise during a reactor run was measured
by 12 thermocouples placed in the tank. The
thermocouples had previously been caJ itrated at
temperatures of 0, 25, and 50°C and agreed to
within 0.1"C.
The first run of the experiment was started at
24"C, and the total temperature rise was approxi-
mately 14°C. The experiment was repented at a
higher temperature level but with the same heat
input and total terriperature rise. The initial
temperature far this run was approximately 15°C
above the ambient temperature, and the rise was
ngain 14°C. The cooling rate ot the conclusion
of this run was 6.3°C/hr. In a third run the initial
temperature was brought 15°C below the ambient
by cooling the reactor tank with ice before the run.
The results of the three runs were consistent to
within 1%. A detailed report of this experiment
is being prepared.2
GE-ANP R-1 DIVIDED-SHIELD MOCKUP TESTS
r. v. ~i~~~~~
D. I. Giliiland
J. Van Hoomissen
F. N. Wfiiitsnn
Tests on the Gk-ANP R-l divided-shield mockup
(Figs. 14.4 and 14.5) will begin with traverses
around the reactor-shield section in the handling
pool for compat ison with measurements made cat
the PI SF.^ hSensur=metits will then be made in
the LSF detector tank, which will be situated 84 ft
from the reactor shield at an altitude @f 195 ft.
It is nnticipated that the datector tank will be
replaced by the crew-compartment iflockup in mid-
September,
-
2C. E. Clifford et al., Cuiorirneinc Powel- I)etermz-
nation o/ the Tower Shielding Reaclor, ORNL CF-54-8-
105 (to be issued).
'!-+. E. tiungerford, Uuik Shielding Fnrilzty Tests on
the GE-ANP R-1 Divided Shzeid Mochup, OKNI. CF-54-8-
94 (to be issued).