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MASS VELOCITY ( Ib/hr .ft2) - PEXIOD ENDING DECEMBER 10, 1952 DWG. 17447 Fig. 2.3. Heat Coefficients of Sodium-to-Air Radiator with Interrupted Fins. drop of the fluoride passing through the nickel tube in excess of 100°F and Reynold's numbers above the laminar range should be achieved. The impeller of the fluoride pump was fabricated from Inconel to compare its corrosion resistance with that of a type 316 stainless steel impeller lthat was used in another loop with an identical Pump. INSTRUMENTATION W. B. McDonald P. G. Smith P. W. Taylor A. L. Southern J. ill. Trummel ANP Division Rotameter Type of Flowmeter. It was reported previously(') that a (7)P. G. Smith and A. L. Southern, ANP Quar. Prog. Rep. Sept. 10, 1952. OWL-1375, p. 23. 29
ANP PROJECT QUARTERLY PROGRESS REPORT rotameter type of flowmeter had been installed in a high-temperature fluoride loop and that it had not operated success full y . The di f f icul ty encountered with the flowmeter was binding of the tapered-core position indicator in its housing as a result of thermal distortion. The details of construction of this flowineter and its principle of operation were given pr e vi ous 1 y . ( ' ) Other such flowmeters have been constructed with increased clearance around the tapered core to prevent binding. One has operated for a period of 600 hr and measured flows up to 17 gpm at 1300°F. The temperature of the static fluoride in which the tapered core operates is 110O0F. Flow measurements have been accurate to within 10%. It was found that such accuracy can be maintained for long periods if close control is maintained over the temperature of the fluorides in which the tapered core is operated. A similar flowmeter, with a capacity to 60 gpm, has been installed and is operating successfully in a larger test loop. This instrument can be adapted for ARE use. RO t a t ing - vane ~1 ownie ter. The r o t a t i n g - van e f 1 o wme t e r manu f a c tu red by the Potter Instrument Co. and modified by the Experimental Engineering group, as reported previously,(') has been installed in a high-temperature loop. Attempts to measure flow with this instrument have been unsuccessful. Under loop operating conditions, no signal that can be calibrated in terms of flow can be obtained from the flowmeter. One difficulty ex- perienced is that the loop heater circuits cause induced voltages in the pickup coil that, are greater than the signal expected from the flowmeter; however, when the heater circuits are turned off for short periods, no useful signal is detectable with the present instrumentation. It is ("W. 8. McDonald and J. hi. Trummel, /uvP Quar. Prog. Rep. Sept. IO, 1952. OWL-1375, P. 24. 30 thought that thermal distortion at this temperature ( 1300 "F) caused the bearings to seize and render the instrument inoperable. 'This instrument w i l l not be available for examination un~il tests with the loop in which it has been placed have been terminated and the loop has been dismantled. 0 i aph ragm Pressure -leas uri ng ~evice. The diaphragm pressuremeasuringdevice reported previously: ') which utilizes a linear differential transformer to measure the deflection of a diaphragm, has been in operation for more than 100 hr at temperatures up to 1040°F. The diaphragm in this instrument is made of 1/16-in., flat, Inconel stock 3 in. in diameter. Preliminary tests indicate that the operation is reliable up to 1OOO'F over the range from 0 to 40 psi. To date, the instrument has been tested only with inert gas against the diaphragm; however, it is not expected that the introduction of molten fluorides w i l l radically change the operating characteristics of the instrument. The only observable effects of increased temperature are a shiftof the zero point and an increase in the slope of the performance curve (Fig. 2.4.). A second instrument is being fabricated that w i l l operate with fluorides at 1000 to 1100°F against the Inconel diaphragm. Moore Nullmatic Pressure Traflsmitter. The Moore Nullmatic pressure transmitter reported previously,( lo ) which was modified to prevent the fluorides from coming in contact with the bellows pressure-sensing element, has been installed in a high-temperature fluoride loop and has operated successfully for approximately 200 hours. The pressure-transmitter temperaturps have ranged as high as 140O0F, and pressures have been measured up to 70 shift has been (9)P. W. Taylor, ANP 3952, ORNL-1375, p. 25. ( '1 bid. psi. A slight zero encountered with Qunr. Prog. Rep. Sep t. 10,
Page 2 and 3: __~ ~ ~~~ . ......... ~ ..... - ...
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Page 9 and 10: e e e PAGE Moore Nullmatic pressure
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Page 13 and 14: PAGE Melting point of 60% Pd-40% Ni
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Page 56 and 57: In the theory of power oscillations
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84 1 E 0 d a 1 Y d .4 rl h u C d d
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the last quarterly report,(') has b
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Design of the tower configuration a
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d 1 I 2 . k IJJ 10 c -- ___li i____
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person received about four times th
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AIYP PROJECT QUARTERLY PKQGRESS REP
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ANF PROJECT QUARTERLY PROGRESS REPO
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ANP PRQ JECT QUARTERLY PROGRESS RQE
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134 = e . , n N N N - Y) o m -J .m
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constituent was found in this loop.
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(mil SId: 3 6 10 15 20 25 30 Extern
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BRAZING ALLOY Nic robr az 60% Mn-40
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on air radiations and simulated fla
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184 Fie. 13.6. Pyrex Thermal Convec
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SUMMARY AND INTRODUCTION The list o
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CF-52-11-85 ORNL- 1 43 3 OWL- 137 2
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H. Seal and Pump Development PERIOD
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12. 13. 14. 15. 16. 1.7. 18. 19. Pr
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i 3. U0,-NaOH Slurry Loop 4. Operat
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7. Fuel Spherical Particle Producti
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