ORNL-1771 - Oak Ridge National Laboratory

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Three brazed lnconel specimens were exposed for 100 hr at 1500°F in \-in.-OD# 0.035-in.-wall lnconel container tubes to static NaF-ZrF,-UF, (53.5-40-6.5 mole %), and three were exposed to static sodium. The brazed specimens were cleaned carefully before and after testing so that valid weight-change data could be obtained. The specimens were nickel plated after exposure to prevent rounding of the edges during metallographic polish- ing. Presented in Table 6.1 are the data obtained by metallographic examination of the specimens. Alloys A and B showed very good resistance to attack by the fluoride mixture, as shown in Figs. 6.1 and 6.2. Alloy A is also shown in Figs. 6.3 and 6.4 at low magnification in the as-brazed and as-tested conditions. Alloy C was attacked slightly by the fluoride mixture. All the alloys were attacked slightly by sodium, with alloy A showing the least attack. The maximum depth of attack of 3 to 4 mils Ni PLATE PERIOD ENDING SEPTEMBER 10, 7954 on alloy A is not serious, since sodium would be in contact with this alloy only in the event of a tube-to-header weld fracture. It may be concluded from the results of these iests that further study is warranted on alloys A and B; both showed good resistance to attack by the fluoride mixture. Special emphasis will be placed on alloy A, since it exhibited superior resistance to attack by sodium. Special Stellite Heats in bdoF-ZrF,-UF, and in Sodium Two special heats of Stellite, heats B and C, were requested from the Union Carbide and Carbon Metals Research Laboratories for corrosion testing. The specimens were sand cast and had Rockwell C hardnesses as follows: heat B, 39 to 42; heat C, 42 to 43. The as-received microstructure consisted of Cr,C, carbide particles in a cobalt-rich matrix. The approximate compositions of these heats were 0.001 _I_ X 0 2 0.002 3.003 83
ANP QUARTERLY PROGRESS REPORT Fig. 6.2. Brazing Allay 6Hi-Ge-G) Fillet Surface After Exposure far 100 kr at 152) OF in NeF-ZrE,- UF, (53,5-48-5,5 KIQ!~ !%)a Etched with oxalic acid, 84 Fig. 6.3. Brazing A!lay A OR Incane! T-Joint in As-Brazed Condition. Etched with oxalic acid.
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Contract No. W-7405-eng-26 AIRCRAFT
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1. G. M. Adamson 2. R. G. Affel 3.
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197-198. Powerplant Laboratory (WAD
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FOREWORD This quarterly progress re
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PART II . MATERIALS RESEARCH 5 . CH
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Remote Metallography ..............
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ANP QUARTERLY PROGRE.S.5 REPORT ver
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AMP QUARTERLY PROGRESS REPORT A dev
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part I REACTOR THEORY, COMPONENT DE
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AMP QUARTERLY PROGRESS REPORT After
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ANP QUARTERLY PROGRESS REPORT the A
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ANP QUARTERLY PROGRESS REPORT 67 g
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ANP QUARTERLY PROGRESS REPORT appro
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ANP QUARTERLY PROGRESS REFORT be si
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ANP QUARTERLY PROGRESS REPORT TABLE
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ANP QUARTERLY PROGRESS REPORT - 22
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in the ZPU system, While this arran
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I ORNL-LR-DWG 3092 CALCULATIONS EXT
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Power level TABLE 2.6. COMPARISON O
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PERIOD ENDING SEPTEMBER JO, 1954 Fi
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ANP QUr4RTERLY PROGRESS REPORT Addi
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ANP QUARTERLY PROGRESS REPORT mater
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ANP QUARTERLY PROGRESS REPORT 138 (
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ANP QUARTERLY PROGRESS REPORT Fig.
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ANP QUARTERLY PROGRESS REPORT The c
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ANP QUARTERLY PROGRESS REPORT oxide
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ANP QUARTERLY PROGRESS REPORT - n 6
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ANP QUARTERLY PROGRESS REPORT 10. A
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ANP QUARTERLY PROGRESS REPORT Oxide
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ANP QUARTERLY PROGRESS REPORT and U
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zirconium or aluminum complex, or l
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11. SHIELDING ANALYSIS J. E. Faulkn
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form in terms of the Spence functio
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these integral 5 become Let and the
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PERIOD ENDING SEPTEMBER IO, 7954 Al
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0 20 40 60 80 IO0 120 140 160 I, Di
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... Two configurations, a single du
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The thermal-neutron flux (Fig. 13.2
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E-7 1 O6 I 5 - - L I ___- 2 f o5 2
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TIME (rnin) PERIOD ENDING SEPTEMBER
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. - ., . ....._____... - PERiOD END
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io3 5 .--w 2 _J U 0 0 >- " 2 2 40 t
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PERIOD ENDING SEPTEMBER 10, 1954 Fi
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part IV APPENDIX
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REPORT NO. ~~-54-a-10 C F-54-6-4 CF
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ORNL-1771 - Oak Ridge National Laboratory

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