Diffusion bonding resistant valve development for sodium service
Unanticipated functional failures occurred in valves undergoing containment integrity testing for liquid sodium service. The failures resulted from diffusion bonding of the Stellite 6B valve plug to the Type 316 stainless steel (SS) seat. As a result of these failures, a valve development program was undertaken. A modified valve incorporating a Tribaloy 800 plug showed significant improvement in resistance to diffusion bonding but still failed after long term exposure in a closed position. A second modified valve using Tribaloy 800 in both the valve plug and seat successfully resisted diffusion bonding failure. This paper reports the details of the testing and posttest valve examinations. The results of scanning electron microscopy, dispersive x-ray spectrometry, and metallography provide the characteristics of the valve failures. Limitations of the various valve designs are also discussed.
- Research Organization:
- EG and G Idaho, Inc., Idaho Falls (USA)
- DOE Contract Number:
- AC07-76ID01570
- OSTI ID:
- 6836062
- Report Number(s):
- EGG-M-13583; CONF-840411-21; ON: DE84012769
- Resource Relation:
- Conference: 3. meeting on liquid metal in energy applications, Oxford, UK, 9 Apr 1984; Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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LMFBR TYPE REACTORS
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METALLOGRAPHY
SCANNING ELECTRON MICROSCOPY
SODIUM
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STELLITE 6
ALKALI METALS
ALLOYS
BREEDER REACTORS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
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CORROSION RESISTANT ALLOYS
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FABRICATION
FAST REACTORS
FBR TYPE REACTORS
FLOW REGULATORS
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HEAT RESISTING ALLOYS
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