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 Dive into the research topics of 'Life extension of hot steam piping after 200 000 h of service'. Together they form a unique fingerprint.

    Cite this