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Table 2. Properties of Fluorides for Use in =&-Temperature Reactors

Compound

Free of Formation at 1000째K (kcal/F atom)

Melting point ("C1

Absorption Cross Sectiona for Thermal Neutrons (barns)

Structural metal fluorides CrF2 FeF2 NiF2

-74 -66.5 -58

1100 930 1330

3.1 2.5 4.6

1330

0.43 0.033b 1.17 1.16 0.7 1.27 0.063 0.70 0.53 1.97 0.010 0.180 0.23 1.06 0.6 0.17 0.032

Diluent fluorides CQ2 LiF ~~~

B@2 SrF2

KF BeF2 DF4

-znF9 A1

2

-~ L

s*2

PbF2 BiF3

-125 -125 -124 -123 -118 -113 -113 -112 -112 -109 -104 -94 -90

-71 -62 -62 -50

870 1280 1400 1324 1144 1270 790 1000 880

545 912 1040 872 213 850 '727

Active fluorides m

4

uF4 uF3

-101 -95.3

-100.4

a0f metallic ion. i

bCross section for 7 ~ i .

1115 1035 1495

ORNL-3708  

http://www.energyfromthorium.com/pdf/ORNL-3708.pdf

ORNL-3708  

http://www.energyfromthorium.com/pdf/ORNL-3708.pdf

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