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PERIOD ENDING DECEMBER 10, 1952 Fig. 12. 3. Spot Welds of Stainless-Steel-Clad Fuel Elements. current 6300 amp, excellent penetration. (b) welding current 5800 alt penetration. Etched with aqua regia. SOX. (a) Welding amp, margin- 163
ANP PROJECT QUARTElilLY PROGRESS REP0 amp. The sheet-to-sheet interface line has been nearly removed; as a result, a moderate strength “stick weld” has been produced. It may be noted that, melting begins at the stainless steel-core interface instead of at, the usual sheet-to-sheet interface. Tensile-shear tests on clad fuel elements that were spot welded under optimum conditions indicate that relatively high shear strengths can be obtained. Strengths of 575 lb per spot weld were recorded when a 3/16-in. restricted-dome electrode was used. Welds in standard stainless sheet of the same type and thickness would be somewhat stronger, but this would be expected because the nugget size would also undoubtedly be larger. Automatic Heliarc Machine Welding. A welding program has been originated to study the operation and welding characteristics of a G-E Fillerweld Machine. This machine consists of a standard inert-gas heliarc torch with an automatic filler-wire addition mechanism. When coupled with a machine welding carriage, this equipment presents an excellent means for semi- automatically welding long straight joints or, when used in conjunction with an appropriate cam, joints of irregular and intricate shapes. In an investigation of the type to he conducted in this laboratory, it is desirable not only to determine abso- lute values of the welding variables but also to study the effects of these variables upon the quality of the welds produced. Preliminary work on this investigation first consisted of adapting the basic equipment to conform with the needs of the program. Experiments have been conducted for the purpose of gaining familiarity with the process and for determining the ranges of welding current and travel speed necessary to produce satisfactory welds with various rates of filler- wire addition. All weld heads have 164 been deposited on flat stainless steel sheet 0.090 in. in thickness, but later the investigation w i l l be focused upon actual joints in sheet stock of similar thicknesses. Fabrication of Heat Exchanger Units. It is necessary to develop t ec h n i qu e s fo r su c c e s s f ul1 y b r a z i ng large, complicated, heat exchanger test assemblies of a type- suitable for aircraft use. An actual unit was assembled in this laboratory and subjected to the Nicrobrazing operation. Figure 12.4 is a photograph of the heat exchanger brazed in dry hydrogen by the canning technique. As can he seen from the photograph, the fins are badly warped and distorted and in some cases, even brazed to- gether. After the leak test with helium, it was found that there were leaks in the tube-to-fin matrix as Fig. 12. 4. Liquid-to-Ais gladiator Nicrobrazed by Canning Technique.
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98- 108. 109. 110- 117. 118. 119-12
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Reports previously issued in this s
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e e e PAGE Moore Nullmatic pressure
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.. CrF. .Na. CrFd .Li. CrF6 .......
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PAGE Melting point of 60% Pd-40% Ni
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ANP PROJECT QUARTERLY PROGRESS REPO
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AYP PROJECT QUARTERLY PROGRESS REPO
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in the hot condition corresponds to
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c-' w FILL TANKS LINE VOLUME APPROX
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the disintegration rates and energi
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2. EXPERIMENTAL REACTOR ENGINEERING
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design of the first combination sea
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the construction of the shaft and r
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on packed seals for pumps and valve
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filling, fluoride leakage occurred
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for 1975 hr at 1500nF.~5) The first
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MASS VELOCITY ( Ib/hr .ft2) - PEXIO
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28C - 240 m W w IT e3 w D z 0 I- CJ
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These conditions were maintained fo
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3. GENERAL DESIGN STUDIES A. P. Fra
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- 8 e 90 85 80 75 rn- 7;) u) w z W
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0 03 06 - PERIOD ENDING DECEMBER 10
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In the theory of power oscillations
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J O dt C’ Again, because of the p
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and The assumed boundary conditions
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where N, = number of atoms per cubi
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4 5 6 7 a 9 10 11 12 13 14 15 16 17
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MSTANCE FROM REACTOR AXIS (in) Pmrm
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z 11 t- o a LT LL 1 .O 0.8 5 0.6 -
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300 250 >- I- 2 & 150 ct W LL 50 0
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T BLE 5. RADIAL PmITxm- (in. 1 REAC
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64 ANP PROJECT QUAMTEREY PROGRESS R
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AN€' PROJECT QUARTERLY PROGRESS R
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68 ANP PROJECT QUARTERLY PROGRESS R
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- *0° 1 BO 440 120 , '0° i 80 , I
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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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ANP PROJECT QUARTERLY PROGRESS REPQ
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ANP PROJECT QUAIRTEHLY PROGRESS REP
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Page 127 and 128: AIYP PROJECT QUARTERLY PKQGRESS REP
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Page 153 and 154: constituent was found in this loop.
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Page 181 and 182: BRAZING ALLOY Nic robr az 60% Mn-40
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Page 197 and 198: on air radiations and simulated fla
Page 199 and 200: 184 Fie. 13.6. Pyrex Thermal Convec
Page 209 and 210: ANP PROJECT QU.4RTEtlLY I'ROGRESS R
Page 214 and 215: SUMMARY AND INTRODUCTION The list o
Page 216 and 217: CF-52-11-85 ORNL- 1 43 3 OWL- 137 2
Page 218 and 219: H. Seal and Pump Development PERIOD
Page 220 and 221: 12. 13. 14. 15. 16. 1.7. 18. 19. Pr
Page 222 and 223: i 3. U0,-NaOH Slurry Loop 4. Operat
Page 224 and 225: 7. Fuel Spherical Particle Producti
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