The Paton Welding Journal, 2007, №04

2007 №04 (06)

2007 №04 (08)

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The Paton Welding Journal, 2007, #4, 31-36 pages

Investigation of performance of welded joints in steam generators PGV-1000M by leak tests

V.I. Makhnenko¹, O.V. Makhnenko¹, O.Ya. Zinchenko²

¹E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.
²National Atomic Power Generation Company «Energoatom», Kiev, Ukraine

Abstract
Increase in excessive pressure in the case of using the air-hydraulic aquarium method for testing leak-tightness of steam generators PGV-1000M leads to increase in gap between a heat exchanger pipe and collector wall. As a result, extra stresses are formed at the gap tip (weld root), which may lead to violation of integrity by the mechanism of initiation of a crack-like design defect. The risk of initiation of fracture with growth of excessive pressure is estimated.
Keywords: heat-exchanger pipes, welded joints, residual stresses, calculation, risk of fracture, performance of joints

References

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Suggested Citation

V.I. Makhnenko, O.V. Makhnenko, O.Ya. Zinchenko (2007) Investigation of performance of welded joints in steam generators PGV-1000M by leak tests. The Paton Welding J., 04, 31-36.

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