Life extension of hot steam piping after 200 000 h of service

Juhani Rantala, Jorma Salonen, Pertti Auerkari, Stefan Holmström, Olli Lehtinen, Martti Pitkänen, Reino Nikkarila

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

Abstract

The units 2 and 3 of Naantali power plant have been successfully operated for more than 200 000 h, and it is of interest to ensure the eligibility of the units for continued production. For this purpose and to assist in the related life assessments, the condition of the high temperature piping has been subjected to long term inspection and monitoring programs. Inspections have been concentrated on sites of earliest indications of creep damage or highest rates of damage accumulation as observed from monitoring and repeated measurements. Particular locations of interest are found at the welded branches of the high pressure steam mixing headers. With these example components, two traditional solutions of directly welded and wrought branch connections are compared in terms of observed creep damage and expected life.
Original languageEnglish
Title of host publicationBALTICA VII - Life Management and Maintenance for Power Plants. Vol. 1
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages61-69
ISBN (Electronic)978-951-38-6316-6
ISBN (Print)978-951-38-6315-9
Publication statusPublished - 2007
MoE publication typeB3 Non-refereed article in conference proceedings
EventBALTICA VII - International Conference on Life Management and Main-tenance for Power Plants - Helsinki-Stockholm, Finland
Duration: 12 Jun 200714 Jun 2007

Publication series

SeriesVTT Symposium
Number246
ISSN0357-9387

Conference

ConferenceBALTICA VII - International Conference on Life Management and Main-tenance for Power Plants
CountryFinland
CityHelsinki-Stockholm
Period12/06/0714/06/07

Fingerprint

Creep
Steam
Inspection
Monitoring
Power plants
Temperature

Cite this

Rantala, J., Salonen, J., Auerkari, P., Holmström, S., Lehtinen, O., Pitkänen, M., & Nikkarila, R. (2007). Life extension of hot steam piping after 200 000 h of service. In BALTICA VII - Life Management and Maintenance for Power Plants. Vol. 1 (pp. 61-69). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 246
Rantala, Juhani ; Salonen, Jorma ; Auerkari, Pertti ; Holmström, Stefan ; Lehtinen, Olli ; Pitkänen, Martti ; Nikkarila, Reino. / Life extension of hot steam piping after 200 000 h of service. BALTICA VII - Life Management and Maintenance for Power Plants. Vol. 1. Espoo : VTT Technical Research Centre of Finland, 2007. pp. 61-69 (VTT Symposium; No. 246).
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title = "Life extension of hot steam piping after 200 000 h of service",
abstract = "The units 2 and 3 of Naantali power plant have been successfully operated for more than 200 000 h, and it is of interest to ensure the eligibility of the units for continued production. For this purpose and to assist in the related life assessments, the condition of the high temperature piping has been subjected to long term inspection and monitoring programs. Inspections have been concentrated on sites of earliest indications of creep damage or highest rates of damage accumulation as observed from monitoring and repeated measurements. Particular locations of interest are found at the welded branches of the high pressure steam mixing headers. With these example components, two traditional solutions of directly welded and wrought branch connections are compared in terms of observed creep damage and expected life.",
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language = "English",
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}

Rantala, J, Salonen, J, Auerkari, P, Holmström, S, Lehtinen, O, Pitkänen, M & Nikkarila, R 2007, Life extension of hot steam piping after 200 000 h of service. in BALTICA VII - Life Management and Maintenance for Power Plants. Vol. 1. VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 246, pp. 61-69, BALTICA VII - International Conference on Life Management and Main-tenance for Power Plants, Helsinki-Stockholm, Finland, 12/06/07.

Life extension of hot steam piping after 200 000 h of service. / Rantala, Juhani; Salonen, Jorma; Auerkari, Pertti; Holmström, Stefan; Lehtinen, Olli; Pitkänen, Martti; Nikkarila, Reino.

BALTICA VII - Life Management and Maintenance for Power Plants. Vol. 1. Espoo : VTT Technical Research Centre of Finland, 2007. p. 61-69 (VTT Symposium; No. 246).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

TY - GEN

T1 - Life extension of hot steam piping after 200 000 h of service

AU - Rantala, Juhani

AU - Salonen, Jorma

AU - Auerkari, Pertti

AU - Holmström, Stefan

AU - Lehtinen, Olli

AU - Pitkänen, Martti

AU - Nikkarila, Reino

PY - 2007

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N2 - The units 2 and 3 of Naantali power plant have been successfully operated for more than 200 000 h, and it is of interest to ensure the eligibility of the units for continued production. For this purpose and to assist in the related life assessments, the condition of the high temperature piping has been subjected to long term inspection and monitoring programs. Inspections have been concentrated on sites of earliest indications of creep damage or highest rates of damage accumulation as observed from monitoring and repeated measurements. Particular locations of interest are found at the welded branches of the high pressure steam mixing headers. With these example components, two traditional solutions of directly welded and wrought branch connections are compared in terms of observed creep damage and expected life.

AB - The units 2 and 3 of Naantali power plant have been successfully operated for more than 200 000 h, and it is of interest to ensure the eligibility of the units for continued production. For this purpose and to assist in the related life assessments, the condition of the high temperature piping has been subjected to long term inspection and monitoring programs. Inspections have been concentrated on sites of earliest indications of creep damage or highest rates of damage accumulation as observed from monitoring and repeated measurements. Particular locations of interest are found at the welded branches of the high pressure steam mixing headers. With these example components, two traditional solutions of directly welded and wrought branch connections are compared in terms of observed creep damage and expected life.

M3 - Conference article in proceedings

SN - 978-951-38-6315-9

T3 - VTT Symposium

SP - 61

EP - 69

BT - BALTICA VII - Life Management and Maintenance for Power Plants. Vol. 1

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Rantala J, Salonen J, Auerkari P, Holmström S, Lehtinen O, Pitkänen M et al. Life extension of hot steam piping after 200 000 h of service. In BALTICA VII - Life Management and Maintenance for Power Plants. Vol. 1. Espoo: VTT Technical Research Centre of Finland. 2007. p. 61-69. (VTT Symposium; No. 246).