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ANP PROJECT PROGRESS REPORT
techniques required to control weld shrinkage so
that final volute dimensions would be within ac-
ceptable tolerances (see Chap. 3.4, "Welding and
Brazing Investigations"). The first set of primary
pump volute halves has been welded.
In the first tests in the new loops the pumps will
be operated with water in order to check the pump
assembly, test-stand vibration, loop resistance,
and operation of the system throttle valve, and,
of primary importance, to correlate performance
and cavitation data with the data previously ob
tained on the water-test rig.
Some engineering changes are being made in order
to lengthen the piping on the primary NaK pump
endurance-testing loop and also on the auxiliary
NaK pump endurance-testing loop and to relocate
these loops for use in calibrating electromagnetic
f lowmeters.
56
HEAT EXCHANGER DEVELOPMENT iJ
E. R. Dytko
R. E. MacPherson J. C. Amos
Intermediate Heat Exchanger Tests
J. W. Cooke H. C. Hopkins
The information obtained from intermediate heat
exchanger (IHE) test stand operation during the
quarter is summarized in Table 1.4.2. York radiator
No. 9, which is being tested in intermediate heat
exchanger test stand A, is currently undergoing a
thermal-cycling program consisting of 16 hr of
power operation followed by 8 hr of isothermal -
operation. During the power phase of the cycle,
the radiator NaK inlet and outlet temperatures are
1500 and 1 100°F, respectively. Isothermal opera-
tion is at 15OoOF. Transition from isothermal to --
power operation is accomplished by dropping the
NaK outlet temperature at a rate of 20°F/sec for
TABLE 1.4.2. SUMMARY OF INTERMEDIATE HEAT EXCHANGER TEST STAND OPERATION
Test Unita
York radiator No. 9
(rev ked design)
Circulating cold trap No. 2
(4 in. in diameter')
NaK screen filter
Hours of b
Total Hours Number of Reason for
Nonisothsrmal
of Oraeration Thermal Cvcles Termination
Opera tion
47 1
Black, Sivalls and Bryson heat 362
exchangers Nos. 1 and 2
(type [HE-3)
Cambridge radiators Nos. 1 820
and 2 (modification 3)
Circulating cold trap No. 3
(4 in. in diameter)
Circulating cold trap No. 5
(4 in. in diameter)
Test Stand A
973
1218
26 4
Test Stand B
403
1345
ahcludes only units tested during this report period.
bFor tests in progress the total operating time is shown as of May 15, 1956.
630
715
'This type of cold trap was prwiously referred to as 80-gol system.
20 Test continuing
Test continuing
Test continuing
3% Test continuing
6% Test continuing
Removed far exami-
nation after heat
exchanger failure
Test continuing
c -
-
c
c
c