ORNL-1771 - Oak Ridge National Laboratory
ORNL-1771 - Oak Ridge National Laboratory ORNL-1771 - Oak Ridge National Laboratory
Similar remarks apply, in part, to the mass spec- trographsc analysis. The samples taken are weighed by the analysts on a microbalance to alleviate the effect of small sample size. However, the handling of the very small crucibles in the hot cells is not so delicate an operation as might be desired. The possibi?ities of contamination entering the sample are high. No highly useful conclusions have emerged from much of the analytical work done in the past, probably because of the difficulties described above. Recently, however, mar ked improvement has been made as a result of continued efforts to improve sampling techniques, sample sizes, und handling procedures, and uranium analyses have been carried out in c1 satisfactory manner. Since the analytical results obtained recently show that no meosurable segregation of uranium takes place, the procedure of taking more than one sample froin each capsule will be abandoned. This will allow very much larger samples to be obtained, will make the analyses more sure, and will minimize the effects of foreign additions to the salt. NIGH-TEMPERATURE CHECK VALVE TESTS W. R. Willis G. W. Keilholtr Solid State Division As part of the development program for a small in-pile pump loop for operation in o beryljium A-piece in the LITR, an attempt was made to deve I op a h igh-temperature c Iiec k-va Ive pump. Such a pump has the advantage of being a compact, completely sealed unit. A test rig was run with Inconel, stainless steel, and Stellite25 check bolls. None of these materials gave successful tests. Time of operation before failure varied from 30 min for the Inconel to 2 hr for the stainless steel. Except with the stainless steel balls, operation of the valves was not con- tinuous; they would occasionally stick in both open and closed positrons. When failure occurred, it was abrupt, and therefore sticking of he valves was indicated rather than a gradual stoppage of the system. MINIATURE IN-PILE LOOP - BENCH TEST An exploded previously4 is coil measures J. C. Morqan G. W. Keilholtz I Solid State Division view of the in-pile pump described shown in Fig. 9.1. The RPM meter the rotation of the shaft on which PERlOD ENDING SEPTEMBER 10, 19.54 is mounted die motor armature, The Graphitar bearing is mounted in the bearing casing above the impeller housing. The assembled loop is shown in Fig. 9.2. The pump contains an extra reservoir- to enable metered vo/vmes of salt to be pumped into the surge tank for calibrating the venturi. The furnace for heating the pwmp and reservoir is also shovvn. From performance tests with this setup, pump speed vs head and pump speed YS flow have been determined. At 5000 rpm the flaw was 4 Cps, corresponding to a Reynolds number of 3000 in ea 200-mil tube. At the 540 w/cm3 generated in-pile, die temperature differential is expected to be about 10PF. LIFE TESTS ON AN RPM METER, BEA AND A SMALL ELEtfRlC MOTOR UNDER ~ ~ ~ A ~ l ~ Y ION J. G., Morgan M. E. Robertson G. W. Keilholtr Solid State Division Tests were conducted on an RPM meter, bearings, and a small electric motor as a part of the de- velopment of n loop fox insertion in an LdTR A- piece, In order to drive the pumpr it is desirable to USE a variable-speed electric motor and to align the shah with lubricated bearings. Also, a record of shaft speed would be desirable. The entire motor assembly will be just above the upper grid guide in the LBTR sand in an estimated thermal flux of 5 fi lQ1 neutrons/cm2.sec. Hole 53 of the ORNL Graphite Reactor provided a comparable flux intensity and was used fur these tests. The in-pile apparatus, with a single lower bearing as in the second test, is shown in Fig. 9.3, A motor was mounted in a horizontal position with upper and lower armature shaft bearings. In the first test two lower bearings were used. The motor and RPM meter were canned and inserted into the center line of the reactor. The variobles measured were resistance of the motor winding, resistance of the RPM coil, the voltage applied to the motor, the current drawn by the motor, the temperature of the lower Fafnir bearing, the temper- ature of the motor field, and the speed of the motor shaft. The Delco ac-dc motor used is rated at 115 v, 13.9 amp, and b5 hp and has insulated wires. Some substitutions of materials were made. In the first
ANP QUARTERLY PROGRESS REPORT 138 (0 RPM METEH COIL @ MOTOR ARMATURE GI BEARING CASING Fig. 9.1. In-Pile Pump. Fig, 9.2, Bench 'Test Loop. 14 '4 EN T U R I @ IMPELLER HOUSING UNCLASSiFIE D PHOTO 12739 UNCI AISIFIED PilOTO 12138 PUMP AND EXTRA RESERVOIR
- Page 99 and 100: ANP QUARTERLY PROGRESS REKIRT TABLE
- Page 101 and 102: ANP QUARTERLY PROGRESS REPORT TABLE
- Page 103 and 104: ANP QUARTERLY PROGRESS REPORi Fig.
- Page 105 and 106: ANP QUARTERLY PROGRESS REPORT TABLE
- Page 107 and 108: ANP QUARTERLY PROGRESS REPORT Ceram
- Page 109 and 110: A N P Q UA R I-EKIY PRO G R ESS R E
- Page 111 and 112: ANP QUARTERLY PROGRESS REPOR7 Effec
- Page 113 and 114: ANP QUARTERLY PROGRESS REPORT Fig.
- Page 115 and 116: ANP QUARTERLY PROGRfSS REPORT Flamm
- Page 117 and 118: AMP QUARTERLY PROGRESS REPORT of tw
- Page 119 and 120: ANP QUARTERLY PROGRESS REPORT The e
- Page 121 and 122: ANP QUARTERLY PROGRESS REPOR7 trans
- Page 123 and 124: AM? QUARTERLY PROGRESS REPORT at pr
- Page 125 and 126: AMP QUARTERLY PROGRESS REPORT studi
- Page 127 and 128: ANP QUARTERLY PROGRESS REPORT The m
- Page 129 and 130: ANP QUARTfRLY PROGHESS REPORT As be
- Page 131 and 132: ANP QUARTERLY PROGRESS REPORr Devel
- Page 133 and 134: ANP QUARTERLY PROGRESS REPORT UNCL
- Page 135 and 136: ANP QUARTERLY PROGRESS REPORi UNCLA
- Page 137 and 138: ANP QUARTERLY PROGRESS REPORT lncon
- Page 139 and 140: ANP QUARTERLY PROGRESS REPORT Fig.
- Page 141 and 142: ANP QUARTERLY PROGRESS R€PORT 450
- Page 143 and 144: ANP QUARTERLY PROGRESS REPORT TABLE
- Page 145 and 146: 132 ANP
- Page 147 and 148: ANP QUr4RTERLY PROGRESS REPORT Addi
- Page 149: ANP QUARTERLY PROGRESS REPORT mater
- Page 153 and 154: ANP QUARTERLY PROGRESS REPORT Fig.
- Page 155 and 156: ANP QUARTERLY PROGRESS REPORT The c
- Page 157 and 158: ANP QUARTERLY PROGRESS REPORT oxide
- Page 159 and 160: ANP QUARTERLY PROGRESS REPORT - n 6
- Page 161 and 162: ANP QUARTERLY PROGRESS REPORT 10. A
- Page 163 and 164: ANP QUARTERLY PROGRESS REPORT Oxide
- Page 165 and 166: ANP QUARTERLY PROGRESS REPORT and U
- Page 167 and 168: zirconium or aluminum complex, or l
- Page 170 and 171: 11. SHIELDING ANALYSIS J. E. Faulkn
- Page 172 and 173: form in terms of the Spence functio
- Page 174 and 175: these integral 5 become Let and the
- Page 176 and 177: PERIOD ENDING SEPTEMBER IO, 7954 Al
- Page 178 and 179: 0 20 40 60 80 IO0 120 140 160 I, Di
- Page 180 and 181: ... Two configurations, a single du
- Page 182 and 183: The thermal-neutron flux (Fig. 13.2
- Page 184 and 185: E-7 1 O6 I 5 - - L I ___- 2 f o5 2
- Page 186 and 187: TIME (rnin) PERIOD ENDING SEPTEMBER
- Page 188 and 189: . - ., . ....._____... - PERiOD END
- Page 190 and 191: io3 5 .--w 2 _J U 0 0 >- " 2 2 40 t
- Page 192 and 193: PERIOD ENDING SEPTEMBER 10, 1954 Fi
- Page 194: part IV APPENDIX
- Page 197: REPORT NO. ~~-54-a-10 C F-54-6-4 CF
ANP QUARTERLY PROGRESS REPORT<br />
138<br />
(0<br />
RPM METEH COIL<br />
@<br />
MOTOR ARMATURE<br />
GI<br />
BEARING CASING<br />
Fig. 9.1. In-Pile Pump.<br />
Fig, 9.2, Bench 'Test Loop.<br />
14<br />
'4 EN T U R I<br />
@<br />
IMPELLER HOUSING<br />
UNCLASSiFIE D<br />
PHOTO 12739<br />
UNCI AISIFIED<br />
PilOTO 12138<br />
PUMP AND EXTRA RESERVOIR