Case Study: Lapino Powerplant Penstock Failure
Publication: Journal of Hydraulic Engineering
Volume 127, Issue 7
Abstract
The paper presents the results of investigations carried out in connection with a penstock rupture at a small hydropower plant in Poland. The investigations comprised material tests of the ruptured penstock shell, analysis of the stress in the shell of the ruptured penstock section, analysis of hydraulic transients under conditions of failure, and testing of the penstock and gensets after repair. In the case under consideration, excessive water hammer caused by rapid flow cut-off was recognized as the direct cause of the penstock burst. Low strength of the penstock shell because of low quality weld joints and lack of strengthening in places of large stress concentration also contributed to the penstock failure. Results of the case investigation highlight some problems that should be taken into account during the process of design, modernization, and operation of hydropower plants in order to ensure their safe operation.
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References
1.
Adamkowski, A. ( 1993). “Waterhammer in pumped-storage power plants: The calculation model and its experimental validation.” Trans. IFFM, Vol. 95, Gdansk, 73–104 (in Polish).
2.
Adamkowski, A. ( 1996). “Theoretical and experimental investigations of waterhammer attenuation by means of cut-off and by-pass valves in pipeline systems of hydraulic turbomachines.” Copybooks of IFFM, 461/1423/96, Gdansk, 154 (in Polish).
3.
Adamkowski, A. ( 1998a). “Causes of penstock breach at the Lapino hydro power plant.” Rep. IFFM 51/98, Gdansk, 52 (in Polish).
4.
Adamkowski, A. ( 1998b). “Investigations of turbine sets at the Lapino hydro power plant after post-breakdown repair.” Rep. IFFM 205/98, Gdansk, 59 (in Polish).
5.
Adamkowski, A., and Henke, A. ( 1998). “Evaluation of the technical state of the steel penstock at the Lapino hydro power plant.” Rep. IFFM 35/98, Gdansk, 28 (in Polish).
6.
Arrington, R. M. ( 1999). “Failure of water-operated needle valves at Bartlett Dam and Oneida station hydroelectric plant.” Proc. 3rd ASME/JSME Joint Fluid Engrg. Conf., July 18–22, San Francisco, Calif., 1–5.
7.
ASCE Task Committee on Guidelines of Aging Penstocks. ( 1995). Guidelines for evaluating aging penstocks, ASCE, New York, 175.
8.
ASCE Task Committee on Inspection and Monitoring of In-Service Penstocks. ( 1998). Guidelines for inspection and monitoring of in-service penstocks, ASCE, Reston, Va., 256.
9.
ASCE Task Committee on Manual of Practice for Steel Penstocks. ( 1993). Steel penstocks, Manual and Rep. No. 79, ASCE, New York, 432.
10.
Beczkowski, W. ( 1964). “Power industry pipelines. Part I. Design and calculations.” 2nd Ed., WNT, Warsaw, 361 (in Polish).
11.
Bonin, C. C. ( 1960). “Waterhammer damage to Oigawa power plant.” Trans. ASME, J. Engrg. for Power, Series A, 82(2), 111–119.
12.
Chaudhry, M. H. ( 1979). Applied hydraulic transients, Van Nostrand Reinhold, New York.
13.
Guidebook (or guidelines) for small hydro power plants. (1991). Nabba, Warsaw, 266 (in Polish).
14.
Helguero, V. M. ( 1986). Piping stress handbook, 2nd Ed., Gulf Publishing, Houston, Tex.
15.
Jackowski, K. ( 1971). “Hydro power plants.” WNT, Warsaw, 406 (in Polish).
16.
Krawczuk, M. ( 1998). “Evaluation of the state of stress in the steel penstock at the Lapino hydro power plant.” Rep. IFFM 21/98, Gdansk, 36 (in Polish).
17.
Krzysztofowicz, T., Krzysztofowicz, K., Nadolny, L., and Targan, M. ( 1998). “Material investigations of the penstock supplying water to turbines at the Lapino power plant.” Rep. IFFM 31/98, Gdansk, 24 (in Polish).
18.
Ostrowski, B., Kasprowski, M., and Latczyk, A. ( 1998). “Investigations of penstocks supplying water to gensets 1 and 2 at the Lapino power plant.” Rep. ZRE, Gdansk, 19 (in Polish).
19.
Pejović, S., Boldy, A. P., and Obradović, D. ( 1987). Guidelines to hydraulic transient analysis, Gower Technical Press, Bradford-on-Avon, Wiltshire, England, 144.
20.
Technical inspection requirements. Pressure devices. Strength calculations. DT-UC-90/W0-0. ( 1991). Technical Inspection Office, Ed. Wydawnictwo Poligraficzne, Bydgoszcz, 149 (in Polish).
21.
Wylie, E. B., and Streeter, L. V. ( 1993). Fluid transients in systems, Prentice-Hall, Englewood Cliffs, N.J., 463.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 127 • Issue 7 • July 2001
Pages: 547 - 555
History
Received: Sep 29, 1999
Published online: Jul 1, 2001
Published in print: Jul 2001
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