Corrosion resistant steam generator and method of making same
A steam generator is described comprising a primary coolant inlet chamber, a primary coolant outlet chamber and at least one primary coolant tube comprising stock tubing and connecting the inlet and outlet chambers and passing through the secondary chamber. The steam generator also consists of: a tubesheet separating at least one of the primary coolant inlet and outlet chambers from the secondary coolant chamber, the tubesheet having at least one passage for receiving an end portion of the primary coolant tube therein, the end portion comprising; a double corrosion and pressure barrier disposed in and in the vicinity of the vicinity of the passage; a transition portion between the stock tubing and the double corrosion and pressure barrier, the transition portion forming a dimensionally smooth and continuous transition between the double corrosion and pressure barrier and the stock tubing, the transition portion further being free from corrosion acceleration sites and having an adequate volume of material to withstand thermal and mechanical stresses and chemical attack; the double corrosion and pressure barrier comprising a sleeve member having a thickness at least on the order of a thickness of the stock tubing and being in intimate contact with and coaxially disposed about at least a part of the end portion.
- Assignee:
- Westinghouse Electric Corp., Pittsburgh, PA
- Patent Number(s):
- US 4579087
- OSTI ID:
- 5678103
- Resource Relation:
- Patent File Date: Filed date 21 Dec 1983
- Country of Publication:
- United States
- Language:
- English
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