ORNL-1771 - Oak Ridge National Laboratory

More documents

Recommendations

Info

TA3LE 6.5. (continued) P€R/OD ENDlNG SEPTEMBER IO, 1954 - . . - __ - - _- Thickness Weight Material Tested Change Change Remarks (XI (XI ... -- __ Sic Some small particles found MgA1204 tr02 (COO stabilized) *'2'3 No visible trace of specimen found Specimen in many smoll pieces; buff color changed to Tested in Lead charcoal- bl a ck 0.0 t0.3 No visible attack; colorless transparent specimen changed to gray; small spot found on specimen; specimen ap- parently covered with thin lead film Sic t2.9 No visible attack; speciiilen broken in loading Mg AI $34 0.0 No visible attack; specimen changed from colorless to gray; broken in loading ZrOZ (GO stobil ized) 0.0 + 0.5 No visible attack; specimen changed from a light buff to gray 'Disk cut from a single crystal; specimen 0.75 in. in diameter and 0.021 in. thick. bDisk 0.75 in. in diameter and 0.021 in. thick. CCleaved from a single crystal; specimen 0.02 x 0.36 X 0.36 in. Specimen Test Medium MsAy34 TABLE 6.6. POWDER X-RAY IOENTIFICATION OF THE PHASES OF SOME OF THE LEAST CORROSION-RESISTANT SPECIMENS Sodium NaF-ZrFd-UF4 (53.5-40-6.5 mote %I Powder X-Ray Data on Specimen ~~~ ~ ..................... ..... ~~ Before Test After Test Face-centered cubic, a = 7.970 Face-centered cubic, a = 7.970 Zr02 (60 Sodium Primarily face-centered cubic Zr02; stabilized) secondarily monoclinic ZrQ2 II__- Lithium Primarily face-centered cubic ZrQ2; secondarily monoclinic ZrQ2 FLUORIDE CORROSION OF INCONEL tN THERMAL-CONVECTION LOOPS G. M. Adamson Metal iurgy Division Effect of UF, in ZrF4=Base Fuels Preliminary results of tneonel thermal-convection loop tests of the corrosive properties of UF3-bearing fluoride mixtures were presented previously2 ~ n d Face-centered cubic, a = 7.981 NaF-ZrF4-UFq pattern Same as before test Unidentified, fa re- centered cubi c, a = 4.674 compared with the corrosive properties of UF,- bearing mixtures. Additional tests with UF3-bearing ZrF4-base mixtures have confirmed the reduction or eliminotion of hot-leg attack, along with the formation of Q hot-leg layer, The lack of attack and the hot-leg layer are illustrated in Fig. 6.14. 95
A N P Q UA R I-EKIY PRO G R ESS R E P ORT The paition of a hot leg shown in Fig. 6-14 was taken from an Inconel thermal-convection loop which had circulated UF, (2,l wt !% UF, in 2.4 wt % total U) in NaF-ZrF, (53-47 innlc %) for 508 hr at a hot-leg temperature of 1500°F. The fluoride mixture was drained from the loop at the operating temperature to ascertain whether the layers previously noted had formed during cooling of the loopa Since the layer was again present, it is now ton- sidered to have formed during operation. This conclusion was further strengthened when the metal lographic examination revealed e diffusion zone between the layer and the base metal. An examination of the layer by ii microspark spectro- graphic: technique3 showed it to be predominantly zirconium. Since this technique is not sensitive to uraniuii~, the layer could also contoin uranium. Thwe is some indication that some of the LJF, dissociates to produce uranium metal, which re- duces some of the ZrF, to produce zirconium metal. The accuracy of the analytical determination for zirconium is not sufficient to reveal ;he reaction products postulated, since some zirconium is also lost by sublimation. graphic exarninatian. The voids did not appear to be the same QS those normally found, and it is thought that they were formed when brittle inter- metallic compounds were pulled out of the base metal during polishing. No hot-leg attack could be found, as shown in Fig. 6.15, but there was a layer 0.5 mil thick on the hot-leg surface. This layer was also reported to be predominantly zirconium. It has been definitely established that the use of UF, rather than UF, in ZrF4-base mixtures will lower the corrosive attack and mass transfer in lnconel systems. s-lO\Mevei, it has been found to be impossible to dissolve sufficient UF, in ZrF4-base mixtures to obtain fuels of interest for high-temperature ienctms, To obtain a fuel with sufficient uranium, it would be necessary to use a mixture of UF, and UF,. Data obtained from loops oper- ated with such mixtures and with standard UF,- bearing mixtures are presented in Table 6.7. The data show clearly that a mixture of UF, and UF, produces less attack than UF, alone, but the mixture does not eliminate the attack, as is the case with UF, alone. In another lncowel loop in which UF, in NaF- Effect of ZrF, wos circulated for 2000 hs at 1500°F, UF, in AJkali-Metal Base Fuels some 7 voids were found to a Cllcpth of 4 mils upon metallo- It has been found that more UF, can be dissolved 'Examination made by C. Feidmon, Chemistry Division. in the alkal i-metal-base fluoride mixtures than in the ZrF4-base mixtures, and therefore additional tests were made with NuF-KF-LiF (1 1.5-42.0-46.5 36 d mole %) containing UF, UF,, and mixtures of the two. . . 8 0 . 4p . . PI. a Fig. 8.15. Hot-Reg Surface ab Inconel Loop After Circulating UF, in HaF-ZrF4 for 2000 ha OF. Unetched. 250X. Reduced 36%. a 5 .
Page 2 and 3:
Contract No. W-7405-eng-26 AIRCRAFT
Page 4 and 5:
1. G. M. Adamson 2. R. G. Affel 3.
Page 6 and 7:
197-198. Powerplant Laboratory (WAD
Page 8:
FOREWORD This quarterly progress re
Page 11 and 12:
PART II . MATERIALS RESEARCH 5 . CH
Page 13 and 14:
Remote Metallography ..............
Page 15 and 16:
ANP QUARTERLY PROGRE.S.5 REPORT ver
Page 17 and 18:
AMP QUARTERLY PROGRESS REPORT A dev
Page 20:
part I REACTOR THEORY, COMPONENT DE
Page 23 and 24:
AMP QUARTERLY PROGRESS REPORT After
Page 25 and 26:
ANP QUARTERLY PROGRESS REPORT the A
Page 27 and 28:
ANP QUARTERLY PROGRESS REPORT 67 g
Page 29 and 30:
ANP QUARTERLY PROGRESS REPORT appro
Page 31 and 32:
ANP QUARTERLY PROGRESS REFORT be si
Page 33 and 34:
ANP QUARTERLY PROGRESS REPORT TABLE
Page 35 and 36:
ANP QUARTERLY PROGRESS REPORT - 22
Page 37 and 38:
in the ZPU system, While this arran
Page 40 and 41:
I ORNL-LR-DWG 3092 CALCULATIONS EXT
Page 42 and 43:
Power level TABLE 2.6. COMPARISON O
Page 44 and 45:
PERIOD ENDING SEPTEMBER JO, 1954 Fi
Page 46 and 47:
I R j I Fig. 2.7. Surfaces of Beryl
Page 48 and 49:
that will permit remote, momentary
Page 50 and 51:
sump in that it must be sufficientl
Page 52 and 53:
J Fig, 3.4. Inconel Forced-Circulat
Page 54 and 55:
- PERIOD ENDING SEPTEMBER 10, 1954
Page 56 and 57:
from 18 to 31 so that tests of long
Page 58 and 59: A A Fig. 4.1. First Reflector-Moder
Page 60 and 61: - 40 32 c 3 24 A F! P ._r >- k > ir
Page 62 and 63: with and without 0.OZin.-thick cadm
Page 64: Part II MATERIALS RESEARCH
Page 67 and 68: ANP QUARTERLY PROGRESS REPORr propo
Page 69 and 70: ANP QUARTERLY PROGRESS REPORT appar
Page 71 and 72: ANP QUARTERLY PROGRESS REPORT urani
Page 73 and 74: ANP QUARTERLY PROGRESS REPORT seems
Page 75 and 76: ANP QUARTERLY PROGRESS REPORT ~~ -
Page 77 and 78: AN P QUARTER 1Y PROGRESS R EPOR J T
Page 79 and 80: ANP QUARTERLY PROGRESS REPORT of 0.
Page 81 and 82: ANP QUARTERLY PROGRESS REPORT q0-2
Page 83 and 84: 4NP QUARTERLY PROGRESS REPORT on d
Page 85 and 86: ANP QUARTERLY PROGRESS R €PO RT P
Page 87 and 88: ANP QUARTERLY PROGRESS REPORT ammet
Page 89 and 90: ANP QUARTERLY PROGRESS REPORT catho
Page 91 and 92: P,NP QUARTERLY PROGRESS REPOK'I ___
Page 93 and 94: ANP QUARTERLY PROGRESS REPORT CH EM
Page 95 and 96: ANP QUARTERLY PROGRESS REPORT A pla
Page 97 and 98: ANP QUARTERLY PROGRESS REPORT Fig.
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 107: ANP QUARTERLY PROGRESS REPORT Ceram
Page 111 and 112: ANP QUARTERLY PROGRESS REPOR7 Effec
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 141 and 142: ANP QUARTERLY PROGRESS R€PORT 450
Page 145 and 146: 132 ANP
Page 147 and 148: ANP QUr4RTERLY PROGRESS REPORT Addi
Page 149 and 150: ANP QUARTERLY PROGRESS REPORT mater
Page 151 and 152: ANP QUARTERLY PROGRESS REPORT 138 (
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
show all

ORNL-1771 - Oak Ridge National Laboratory

Create successful ePaper yourself

Delete template?

Save as template?