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and Type 304L Stainless Steel at 650°C50

6.3 Reaction of CoF3 with Tellurium51

7. BEHAVIOR OF HYDROGEN AND ITS ISOTOPES53

7.1 Solubility of Hydrogen in Molten Salt53

7.2 Initial Tritium Chemistry in the Core of a Molten-Salt Reactor53

7.3 Permeation of Hydrogen Through Metals at Low Pressures54

7.4 Influence of Films or Coatings on Hydrogen Permeation Rates56

7.5 Experiments on Hydrogen Evolution from Fluoroborate Coolant Salt57

7.6 Apparatus for Infrared Spectral Studies of Molten Salts59

7.7 Infrared Spectral Studies of the Chemical Behavior of BF3OH- and

BF3OD- Ions in Molten NaF-NaBF459

7.8 Thermal Stability of NaNO3, KNO3, NaNO2, and HITEC62

8. FLUOROBORATE CHEMISTRY63

8.1 Solubility of BF3 in Fluoride Melts63

8.1.1 Reactor Applications63

8.2 Free Energies of Formation of NaFeF3 and NaNiF3; Their Relationship

to the Corrosion of Hastelloy N by Fluoroborates65

8.3 Preparation of Fused Sodium Fluoroborate for the Coolant Salt Technology Facility68

9. PROTACTINIUM CHEMISTRY70

9.1 Oxide Chemistry of Protactinium in MSBR Fuel Salt70

9.2 Binary Solid Solutions of PaO2 and Other Actinide Dioxides and Their

Exchange Equilibria with Molten-Salt Reactor Fluorides72

9.3. Ternary Solid Solutions of ThO2, PaO2, and UO274

10. DEVELOPMENT AND EVALUATION OF ANALYTICAL METHODS

FOR MOLTEN-SALT REACTORS77

10.1 In-Line Chemical Analysis of Molten Fluoride Salt Streams77

10.2 Theoretical Considerations of the Voltammetric In-Line Determination of Uranium(III)80

10.3 Electroanalytical Studies of Titanium(IV) in Molten LiF-BeF2-ZrF4 (65.4-29.6-5.0 Mole %)81

10.4 Electrochemical Studies of Bismuth(III) in Molten LiF-BeF2-ZrF4 at 500°C82

10.5 Voltammetry of Chromium(III) in Molten NaBF4-NaF (92-8 Mole %)82

10.6 Voltammetric and Hydrolysis Studies of Protonated Species in Molten NaBF483

10.7 Determination of Hydrogen in NaF-NaBF4 Salts83

10.8 Spectral Studies of Molten Salts84

11. OTHER MOLTEN-SALT RESEARCHES87

11.1 The Oxide Chemistry of Niobium in Molten LiF-BeF2 Mixtures87

11.1.1 Equilibrations of Nb2O5 and BeO with Molten LiF-BeF2 Mixtures87

11.1.2 Equilibrations Involving Nickel Niobates in Molten Li2BeF489

11.2 The Reaction of MoF6 with Niobium91

11.3 Thermodynamics of LiF-BeF2 Mixtures95

11.4 Electrochemical Mass Transport in Molten Beryllium Fluoride-Alkali Fluoride Mixtures96

11.5 Electrical Conductance in Beryllium Fluoride Rich NaF-BeF2 Mixtures98

11.6 The Disproportionation Equilibrium of UF3 Solutions98

11.7 The Raman Spectra of Be2F73- and Higher Polymers of Beryllium

Fluorides in the Crystalline and Molten State100

11.8 Raman Spectra of Molten and Crystalline Potassium Dichromate103

11.9 Nonideality of Mixing in the Systems Li2BeF4-LiI, Na2BeF4-NaI, and Cs2BeF4-CsI 106

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