Occurence and prediction of sigma phase in fuel cladding alloys for breeder reactors. [LMFBR]
In sodium-cooled fast reactor systems, fuel cladding materials will be exposed for several thousand hours to liquid sodium. Satisfactory performance of the materials depends in part on the sodium compatibility and phase stability of the materials. This paper mainly deals with the phase stability aspect, with particular emphasis on sigma phase formation of the cladding materials upon extended exposures to liquid sodium. A new method of predicting sigma phase formation is proposed for austenitic stainless steels and predictions are compared with the experimental results on fuel cladding materials. Excellent agreement is obtained between theory and experiment. The new method is different from the empirical methods suggested for superalloys and does not suffer from the same drawbacks. The present method uses the Fe-Cr-Ni ternary phase diagram for predicting the sigma-forming tendencies and exhibits a wide range of applicability to austenitic stainless steels and heat-resistant Fe-Cr-Ni alloys.
- Research Organization:
- Hanford Engineering Development Lab., Richland, WA (USA)
- DOE Contract Number:
- AC06-76FF02170
- OSTI ID:
- 5682502
- Report Number(s):
- HEDL-SA-2457-FP; CONF-820205-1; ON: DE82005887; TRN: 82-008022
- Resource Relation:
- Conference: 111. AIME annual meeting, Dallas, TX, USA, 1 Feb 1982
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mechanical properties of irradiated fast breeder reactor cladding and ducts
REACTOR TECHNOLOGY QUARTERLY REPORT NO. 4. METALLURGY AND MATERIALS
Related Subjects
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
LMFBR TYPE REACTORS
REACTOR MATERIALS
CORROSION
PHASE STUDIES
STAINLESS STEELS
COMPATIBILITY
FUEL CANS
MICROSTRUCTURE
SODIUM
ALKALI METALS
ALLOYS
BREEDER REACTORS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
ELEMENTS
EPITHERMAL REACTORS
FAST REACTORS
FBR TYPE REACTORS
IRON ALLOYS
IRON BASE ALLOYS
LIQUID METAL COOLED REACTORS
MATERIALS
METALS
REACTORS
STEELS
360102* - Metals & Alloys- Structure & Phase Studies
210500 - Power Reactors
Breeding
360105 - Metals & Alloys- Corrosion & Erosion