Turbine repair at Nesjavellir geothermal power plant: An Icelandic case study

Reynir Smari Atlason, Almar Gunnarsson, Runar Unnthorsson

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

During a quadrennial inspection of a 30 MW Mitsubishi steam turbine at Nesjavellir geothermal power plant, corrosion products were found on the last set of labyrinth packing in the gland seal system which resulted in erosion corrosion of the turbine rotor. The rotor had worn by approximately 8 mm. Because of the tight timeframe of the overhaul, it was decided to repair this failure on site using the experience of the staff and domestic industry. Labyrinth seals were built by a domestic machine shop, decreasing cost and shutdown time dramatically. This article describes the occurring failure and how it was repaired within days with cooperation between the energy company and domestic industry. It further discusses probable causes for such failure and how it may be prevented. The article describes in essence how valuable it can prove to build maintenance knowledge domestically in the geothermal sector.
OriginalsprogEngelsk
TidsskriftGeothermics
Vol/bind53
Sider (fra-til)166-170
ISSN0375-6505
StatusUdgivet - 2015
Udgivet eksterntJa

Fingeraftryk

Geothermal power plants
geothermal power
turbine
repair
corrosion
power plant
Turbines
Repair
Seals
industry
Rotors
Machine shops
Corrosion
Industry
Plant shutdowns
Steam turbines
erosion
Erosion
Inspection
cost

Citer dette

Atlason, R. S., Gunnarsson, A., & Unnthorsson, R. (2015). Turbine repair at Nesjavellir geothermal power plant: An Icelandic case study. Geothermics, 53, 166-170.
Atlason, Reynir Smari ; Gunnarsson, Almar ; Unnthorsson, Runar. / Turbine repair at Nesjavellir geothermal power plant: An Icelandic case study. I: Geothermics. 2015 ; Bind 53. s. 166-170.
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abstract = "During a quadrennial inspection of a 30 MW Mitsubishi steam turbine at Nesjavellir geothermal power plant, corrosion products were found on the last set of labyrinth packing in the gland seal system which resulted in erosion corrosion of the turbine rotor. The rotor had worn by approximately 8 mm. Because of the tight timeframe of the overhaul, it was decided to repair this failure on site using the experience of the staff and domestic industry. Labyrinth seals were built by a domestic machine shop, decreasing cost and shutdown time dramatically. This article describes the occurring failure and how it was repaired within days with cooperation between the energy company and domestic industry. It further discusses probable causes for such failure and how it may be prevented. The article describes in essence how valuable it can prove to build maintenance knowledge domestically in the geothermal sector.",
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Atlason, RS, Gunnarsson, A & Unnthorsson, R 2015, 'Turbine repair at Nesjavellir geothermal power plant: An Icelandic case study', Geothermics, bind 53, s. 166-170.

Turbine repair at Nesjavellir geothermal power plant: An Icelandic case study. / Atlason, Reynir Smari ; Gunnarsson, Almar; Unnthorsson, Runar.

I: Geothermics, Bind 53, 2015, s. 166-170.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Turbine repair at Nesjavellir geothermal power plant: An Icelandic case study

AU - Atlason, Reynir Smari

AU - Gunnarsson, Almar

AU - Unnthorsson, Runar

PY - 2015

Y1 - 2015

N2 - During a quadrennial inspection of a 30 MW Mitsubishi steam turbine at Nesjavellir geothermal power plant, corrosion products were found on the last set of labyrinth packing in the gland seal system which resulted in erosion corrosion of the turbine rotor. The rotor had worn by approximately 8 mm. Because of the tight timeframe of the overhaul, it was decided to repair this failure on site using the experience of the staff and domestic industry. Labyrinth seals were built by a domestic machine shop, decreasing cost and shutdown time dramatically. This article describes the occurring failure and how it was repaired within days with cooperation between the energy company and domestic industry. It further discusses probable causes for such failure and how it may be prevented. The article describes in essence how valuable it can prove to build maintenance knowledge domestically in the geothermal sector.

AB - During a quadrennial inspection of a 30 MW Mitsubishi steam turbine at Nesjavellir geothermal power plant, corrosion products were found on the last set of labyrinth packing in the gland seal system which resulted in erosion corrosion of the turbine rotor. The rotor had worn by approximately 8 mm. Because of the tight timeframe of the overhaul, it was decided to repair this failure on site using the experience of the staff and domestic industry. Labyrinth seals were built by a domestic machine shop, decreasing cost and shutdown time dramatically. This article describes the occurring failure and how it was repaired within days with cooperation between the energy company and domestic industry. It further discusses probable causes for such failure and how it may be prevented. The article describes in essence how valuable it can prove to build maintenance knowledge domestically in the geothermal sector.

KW - Geothermal rotor

KW - Labyrinth packing

KW - Gland seal

KW - Iceland

KW - Domestic production

M3 - Journal article

VL - 53

SP - 166

EP - 170

JO - Geothermics

JF - Geothermics

SN - 0375-6505

ER -

Atlason RS, Gunnarsson A, Unnthorsson R. Turbine repair at Nesjavellir geothermal power plant: An Icelandic case study. Geothermics. 2015;53:166-170.