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o X-RAY PATTERN OBTAINED AT THESE COMPOSITIONS SOLID SOLUTIO PIERIOD ENDING DECEMBER 10, 1952 SOLID SOLUTION - DWG. 17407 K3CrF6 K2 L i Cr F6 Li2KCrF6 Li,CrF, Fig. 10.6. The System K3CrF,-Na,CrF,-Li3CrFd. Division). The samples prepared by heating UF, with ZrF4, with and without NaF, show a complex compound UF3*2ZrF4, which is an orange-red crystalline solid that is occasionally found as a reduction product of ZrF4 -bearing fue is. When this material is heated with NaF at 850 OC or when UF, and ZrF, in proper ratio are heated with NaF, the products include UF,, some UF, *2ZrF,, and some NaZrFS. The latter compound usually contains someNaUFS in solid solution, presumably formed by traces of oxidants in the system. Since NaF can "steal' ZrF, from UF;2ZrF4, apparently NaZrFS is a more stable compound thantheUFJ-2ZrF4 complex. The 2ZrF, *UF, compound has been found in loops in which there was severe reduction of the UF, in the fuel because of the injection of NaK, and alsoin capsules in which zirconium metal or NaK had been added to the fuel. 117
ANP PR0,jlECT QUARTERLY PROGRESS REPORT NaF-ZrF, (P. A. Agron, Materials Chemistry Division) ‘The x-ray studies of the NaF-ZrF, system(g) have been extended to the region of 75 mole % of ZrF,. The crystal structures of the solid phases Na,ZrF, and NaZrF5 have been reported previously.( lo) Studies of the behavior of the phases that appear in cornpositions lying between these two compounds and of those that lie beyond the NaZrF5 compositions are being made; considerable additional study w i l l be required, since the system is an exceedingly complex one. Other Fluoride ComnpSexes (8. J. Sturm and I,. G. Overholser, Mat.erials Chemistry Division). It was previously noted that a preparation corresponding to K2NaFeFs was thonght to be iso- morphous with K2NaCrF6. Further study has shown that Na3FeF, and K,FeF, apparently form solid solutions over a wide range, probably in all proportions, X-ray patterns for materials corresponding to K,FeF,, K3NaFeF6, K,Na( FeF,),, and KNa2FeF, differ only by slight shifts in lines, Fusion of equal molar proportions of KMF,, NaHF,, and NiF;4H,O at 850°C resulted in a yellow compound, probably KNaNiF,. A fusion in the proportions corresponding to K3Na(NiF2), gave a mixture of K,NiF, and KNaNiF,. Heating a mixture of KNiF,*lXH,O (prepared from aqueous solution) and NH,F, at 700’C yielded a product that agrees with the ASTM x-ray diffraction data for anhydrous KNiF,. Interaction of chromium metal. with K,NiF, at 850°C for 5 hr resulted in the formation of K3CrF, by the f ol 1 o wi 11 g rea c t ion : 3K,NiF, f 2Cr ---+ 2K3CrF, + 3Ni . This behavior is comparable to that previously noted for displacement of Fe from K,NaFeF, by Cr. (9)L. M. Bretcber and C. J. Barton, wCoolaat Development, ” this chapter. (lo)@. Agron, ANP Quar. Prog. Rep. Sept. 20, 19.52, ORML-1375, p. 85. 118 REACTIONS OF FEIJBBIXDE MIXTURES WITH REDIlCXWG AGENTS W. 13. Grimes Materials Chemistry Division L. A. Mann ANP Division The reactions of possible ARE fuel mixtures with reducing agents were first examined in an effort to evaluate the damage that would result if NaK were inadvertently admitted to the fuel circuit during operation. Identi- fication of the prodiicts in these complex mixtures was shown to bea very di f ficu 1 t pro blem. Ne cen tly , however, it has been demonstrated that addition of reducing agents to the fluoride melts decreases the corrosion by these materials. Since production of UF, and the consequent precipitation of uranium at high temperature can result from excessive addition of reductant, a careful studyof the fluoride systems under reducing conditions has been undertaken. Reducing Power of Varioiis Additives (J. C. White, Analytical Chemistry Division). The total reducing power of reaction products resulting from the addition of NaK to such materials as ZrF,, NaF, and UF, and such mixtures as NaF-ZrF, -1JF, and NaF-ZrF,, has been measured by two methods: (I) oxi- dation with standard ceric sulfate solution and (2) hydrogen evolution from dissolution in mineral acid. The validity of these procedures has been verified by using control samples, such as UF, and Zr. In practically none of the NaK addition tests, however, has a reduci-rig action equiva- lent to the amount of NaK added been observed . This reduction phenomenon has also been observed when UF, has been added to NaF and ZrF, and treated as in fuel preparation. One compound, Na3U,F,, gave nearly the theoretical amount of UF, added. Several samples of fuels that had undergone corrosion testing were
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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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Page 107 and 108: the last quarterly report,(') has b
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Page 114: person received about four times th
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ANP PRQJECT QUARTERLY PROGRESS REPO
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ANP PROJECT QUARTERLY PIJQGRESS REP
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ANP PRQJECT QUAMTERLY PWOd;l"aESS R
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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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ANP PROJECT QU.4RTEtlLY I'ROGRESS R
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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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