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• Project report: Behaviour of Copper under Load Transients

  Rantala, J. & Pohja, R., 28 Feb 2023, Espoo: VTT Technical Research Centre of Finland. 21 p. (VTT Research Report; No. VTT-R-00131-23).

  Research output: Book/Report › Report

  Open Access

  File
  4 Downloads (Pure)

• Experimentally verified model based predictions for integrity of Cu overpack

  Rantala, J., Pohja, R., Auerkari, P., Laukkanen, A. & Andersson, T., 2019, Baltica XI: International Conference on Life Management and Maintenance for Power Plants. VTT Technical Research Centre of Finland, 9 p.

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

  Open Access

  File
  28 Downloads (Pure)

• Life assessment and maintenance of welded piping operating at high temperatures

  Pohja, R., Tuurna, S., Hakala, T. J., Auerkari, P., McNiven, U., Laaksonen, L. & Nikkarila, R., 2019, Baltica XI: International Conference on Life Management and Maintenance for Power Plants. VTT Technical Research Centre of Finland, 10 p.

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

  Open Access

  File
  282 Downloads (Pure)

• Experimentally verified model based predictions for integrity of copper overpack: Annual report 2017

  Rantala, J., Pohja, R. & Auerkari, P., 23 Mar 2018, Espoo: VTT Technical Research Centre of Finland. 17 p. (VTT Research Report; No. VTT-R-01499-18).

  Research output: Book/Report › Report

  Open Access

  File
  31 Downloads (Pure)

• Residual life assessment supported by testing of ex-service material

  Auerkari, P., Rantala, J., Pohja, R., Yli-Olli, S. & Pohjanne, P., 2019, Baltica XI: International Conference on Life Management and Maintenance for Power Plants. VTT Technical Research Centre of Finland, 5 p.

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

  Open Access

  File
  48 Downloads (Pure)

• Riskiperustaisesta arvioinnista tukea voimalaitoskomponenttien eliniän hallintaan

  Tuurna, S., Pohja, R. & Auerkari, P., 2015, In: Voima ja käyttö. 109, 10, 17.

  Research output: Contribution to journal › Article › Professional

• Joustavan käytön haasteita korkean lämpötilan rakenteille

  Pohja, R., 2016.

  Research output: Contribution to conference › Conference article › Professional

• LCSP creep strain model performance of zirconium based fuel cladding materials in steady state and transient creep conditions

  Pohja, R., 2016, VTT Technical Research Centre of Finland. 27 p. (VTT Research Report; No. VTT-R-06036-15).

  Research output: Book/Report › Report

• Semantic segmentation for the analysis of creep voids in metallic materials

  Zeb, A., Linnosmaa, J., Pohja, R. & Pakarinen, J., 16 Nov 2022.

  Research output: Contribution to conference › Conference Poster › Scientific

  File
  7 Downloads (Pure)

• Sensitivity analysis of FEA simulations and the effect of instability factors in stress relaxation on the life assessmentof the final disposal canister made of copper (POHELY): Final report

  Andersson, T., Laukkanen, A. & Pohja, R., 2016, VTT Technical Research Centre of Finland. 35 p. (VTT Research Report; No. VTT-R-03674-15).

  Research output: Book/Report › Report

• Risk and resilience assessment for an urban system of energy supply

  Molarius, R., Auerkari, P., Koivisto, R., Tuurna, S., Pohja, R., Jovanovic, A. & Hapuli, H., 30 Oct 2018. 13 p.

  Research output: Contribution to conference › Conference article › Professional

• Experimentally verified model based predictions for integrity of copper overpack: Annual report 2015

  Rantala, J., Auerkari, P., Laukkanen, A., Andersson, T., Pohja, R. & Saukkonen, T., 2016, VTT Technical Research Centre of Finland. 23 p. (VTT Research Report; No. VTT-R-00832-16).

  Research output: Book/Report › Report

• Advanced cladding materials for accident tolerant fuels

  Heikinheimo, J., Huotilainen, C., Pohja, R., Ivanchenko, M. & Loukusa, H., 31 Oct 2019, SYP2019 Proceedings. Finnish Nuclear Society, 4 p.

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

  Open Access

• Tube failure of the heat exchanger E-20-128

  Auerkari, P., Pohja, R. & Salonen, J., 2013, VTT Technical Research Centre of Finland. 20 p. (VTT Research Report; No. VTT-R-05631-13).

  Research output: Book/Report › Report

• Fiscal year report (9/2013 - 9/2014) of the Academy of Finland project IDEA (Interactive Modelling of Fuel Cladding Degradation Mechanisms)

  Anderson, T., Huotilainen, S., Loukusa, H., Penttilä, S., Pohja, R. & Tulkki, V., 2014, VTT Technical Research Centre of Finland. 10 p. (Helsinki University of Technology: Systems Analysis Laboratory. A: Research Reports; No. VTT-R-05121-14).

  Research output: Book/Report › Report

• Object detection for the analysis of creep voids in high-temperature metallic structures

  Zeb, A., Tahkola, M., Pohja, R. & Pakarinen, J., 24 Nov 2021.

  Research output: Contribution to conference › Conference Abstract › Scientific

  File
  48 Downloads (Pure)

• Recommendation for creep and creep-fatigue assessment for P91 components

  Pohja, R., Holmström, S. & Lee, H-Y., 2015, European Commission EC. 43 p.

  Research output: Book/Report › Report

  Open Access

• Physics and chemistry of nuclear fuel (PANCHO)

  Arkoma, A., Ikonen, T., Kättö, J., Loukusa, H., Myllykylä, E., Pohja, R., Tulkki, V. & Valtavirta, V., 2017, SAFIR2018 - The Finnish Research Programme on Nuclear Power Plant Safety 2015-2018: Interim Report. Hämäläinen, J. & Suolanen, V. (eds.). VTT Technical Research Centre of Finland, p. 192-202 (VTT Technology, Vol. 294).

  Research output: Chapter in Book/Report/Conference proceeding › Chapter or book article › Professional

• Report on an experimental campaign on cladding transient behaviour

  Pohja, R. & Huotilainen, S., 2017, VTT Technical Research Centre of Finland. (VTT Research Report, Vol. VTT-R-00799-17).

  Research output: Book/Report › Report

• Lämmönvaihtimen RBI

  Auerkari, P., Pohja, R., Tuurna, S. & Tuhti, A., 2017, VTT Technical Research Centre of Finland. (VTT Tutkimusraportti; No. VTT-R-04939-16).

  Research output: Book/Report › Report

• Performance of high-temperature materials for efficient power plants: The waterside challenge

  Auerkari, P., Yli-Olli, S., Penttilä, S., Tuurna, S. & Pohja, R., 1 Jul 2016, In: Journal of Nuclear Engineering and Radiation Science. 2, 3, 031009.

  Research output: Contribution to journal › Article › Scientific › peer-review
  1 Citation (Scopus)

• Lifing of high temperature plant: deterministic and probabilistic methods

  Auerkari, P., Pohja, R., Yli-Olli, S., Rantala, J. & Laukkanen, A., 2014, VTT Technical Research Centre of Finland. 21 p. (VTT Research Report; No. VTT-R-00753-14).

  Research output: Book/Report › Report

• Narrow Gap Arc Welding Experiments of Thick Copper Sections

  Pohja, R., Vestman, H., Jauhiainen, P. & Hänninen, H., 2003, Posiva. 41 p. (Posiva Report; No. POSIVA-2003-09).

  Research output: Book/Report › Report

• Practical aspects of applying risk-based approaches in asset management for heat exhangers

  Tuurna, S., Auerkari, P., Pohja, R., Jovanovic, A. & Husta, S., 29 May 2018.

  Research output: Contribution to conference › Other conference contribution › Professional

• Uncertainties, decision criteria and resilience to damage and failure of a heat exchanger

  Auerkari, P., Pohja, R., Tuurna, S., Tuhti, A., Laaksonen, L. & McNiven, U., 2017.

  Research output: Contribution to conference › Conference Abstract › Scientific

• Creep-fatigue properties of nickel-base superalloy 263

  Pohja, R., Nurmela, A., Holmström Stefan & Moilanen, P., 2013, Baltica IX. International Conference on Life Management and Maintenance for Power Plants - Abstracts. Auerkari, P. & Veivo, J. (eds.). Espoo: VTT Technical Research Centre of Finland, p. 32 (VTT Technology; No. 107).

  Research output: Chapter in Book/Report/Conference proceeding › Conference abstract in proceedings › Scientific

  Open Access

• Spinning wheel materials

  Auerkari, P., Salonen, J., Pohja, R., Nevasmaa, P. & Yli-Olli, S., 2013, VTT Technical Research Centre of Finland. 28 p. (VTT Research Report; No. VTT-R-05845-13).

  Research output: Book/Report › Report

• Manufacturing of Fe-Cr-Al weld overlay coatings for high temperature applications

  Sarikka, T., Ilola, R., Hänninen, H., Pohja, R. & Tuurna, S., 2012. 7 p.

  Research output: Contribution to conference › Conference article › Scientific

• Creep-fatigue interaction models for grade 91 steel

  Holmström, S., Pohja, R. & Payten, W., 2014, In: Materials Performance and Characterization. 3, 2, p. 156-181 MPC20130054.

  Research output: Contribution to journal › Article › Scientific › peer-review
  4 Citations (Scopus)

• Relaxation behaviour of copper in disposal canisters

  Rantala, J., Pohja, R., Auerkari, P., Laukkanen, A. & Andersson, T., 2016, Baltica X: International Conference on Life Management and Maintenance for Power Plants. Auerkari, P. (ed.). Espoo: VTT Technical Research Centre of Finland, 8 p. (VTT Technology, Vol. 261).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

  Open Access

• Properties of FeCrAl Alloys and Austenitic Stainless Steel for Boiler Environments

  Pohja, R. & Hänninen, H., 2010, Espoo: Aalto University. 97 p. (Aalto yliopiston teknillinen korkeakoulu: Koneenrakennustekniikan laitos, Vol. 2/10).

  Research output: Book/Report › Report

• Cyclic softening of tempered ferritic-martensitic steel P91

  Janousek, J., Holmström, S. & Pohja, R., 2015.

  Research output: Contribution to conference › Conference article › Scientific

• Softening and relaxation of GR.91 steel in creep-fatigue conditions

  Janoušek, J., Sauzay, M., Pohja, R. & Holmström, S., 2018, 27th International Conference on Metallurgy and Materials, Conference Proceedings: METAL 2018. TANGER Ltd., p. 536-541

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

  Open Access

• Creep-fatigue properties of grade 91 steel

  Pohja, R., Nurmela, A., Moilanen, P. & Holmström, S., 2013, Advances in Materials Technology for Fossil Power Plants : Proceedings from the 7th International Conference, EPRI 2013 . Gandy, D. & Shingledecker, J. (eds.). Electric Power Research Institute, p. 679 - 689

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

• Creep modelling for long-term low strain regime including the limit of negligible creep

  Auerkari, P., Holmström, S., Pohja, R. & Rantala, J., 2017. 6 p.

  Research output: Contribution to conference › Conference article › Scientific › peer-review

• Modelling for Creep Cavitation Damage and Life of Three Metallic Materials

  Pohja, R., Auerkari, P. & Vilaça, P., 7 Jan 2022, In: Materials at High Temperatures. 39, 1, p. 86-96

  Research output: Contribution to journal › Article › Scientific › peer-review

  Open Access

• Creep-fatigue properties of nickel-base superalloy 263

  Pohja, R., Nurmela, A., Holmström Stefan & Moilanen, P., 2013, Baltica IX. International Conference on Life Management and Maintenance for Power Plants. Auerkari, P. & Veivo, J. (eds.). Espoo: VTT Technical Research Centre of Finland, p. 204-217 (VTT Technology; No. 106).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

  Open Access

• Flexible future of power plants - challenges and solutions

  Tuurna, S., Auerkari, P., Pohja, R., McNiven, U., Lilja, M. & Rydl, O., 13 Mar 2018.

  Research output: Contribution to conference › Conference article › Professional

• Relaxation of OFP copper

  Auerkari, P., Pohja, R., Nurmela, A. & Rantala, J., 2014, Espoo: VTT Technical Research Centre of Finland. 12 p. (VTT Research Report; No. VTT-R-00366-14).

  Research output: Book/Report › Report

• Predicted life of thick-wall P91 steel for cyclic high temperature service

  Pohja, R., Holmström, S., Auerkari, P. & Nurmela, A., 2017.

  Research output: Contribution to conference › Conference article › Scientific › peer-review

• RBI and assessment of component life for high temperature service

  Auerkari, P., Pohja, R., Yli-Olli, S., Tuurna, S., Pohjanne, P., McNiven, U. & Husta, S., 2016.

  Research output: Contribution to conference › Conference article › Scientific

• Creep and creep-fatigue behaviour of 316 stainless steel

  Holmström, S., Pohja, R., Nurmela, A., Moilanen, P. & Auerkari, P., 2013, In: Procedia Engineering. 55, p. 160-164

  Research output: Contribution to journal › Article › Scientific › peer-review

  Open Access
  18 Citations (Scopus)

• Practical aspects of applying risk-based approaches in asset management for power plant

  Auerkari, P., Jovanovic, A., Husta, S., Pohja, R., Tuurna, S., Pohjanne, P., McNiven, U. & Laaksonen, L., 2017. 10 p.

  Research output: Contribution to conference › Conference article › Scientific

• State-of-the-art review of data on fuel cladding interaction in advanced fuels for Gen IV reactors

  Dumas, J-C., Martinelli, L., Bottomley, D., Wallenius, J., Tulkki, V. & Pohja, R., 2015, European Commission EC. 91 p.

  Research output: Book/Report › Report

• Multifunctional high precision pneumatic loading system (HIPS) for creep-fatigue testing

  Pohja, R., Nurmela, A., Moilanen, P. & Holmström, S., 2013, In: Procedia Engineering. 55, p. 573-577 5 p.

  Research output: Contribution to journal › Article › Scientific › peer-review

  Open Access
  2 Citations (Scopus)

• Supervised RIsx: Defining resilience indicators based on risk assessment

  Øien, K., Bodsberg, L., Hoem, Å., Øren, T., Molarius, R., Koivisto, R., Auerkari, P., Pohja, R., Tuurna, S. & et al., 2017, European Commission EC. 280 p.

  Research output: Book/Report › Report

  Open Access

• Creep performance of fuel cladding

  Pohja, R., Tulkki, V., Ikonen, T., Moilanen, P., Rantala, J., Huotilainen, S. & Ehrnstén, U., 2016, Baltica X: International Conference on Life Management and Maintenance for Power Plants. Auerkari, P. (ed.). Espoo: VTT Technical Research Centre of Finland, 8 p. (VTT Technology, Vol. 261).

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

  Open Access

• Predicted life of P91 steel for cyclic high temperature service

  Pohja, R., Holmström, S., Auerkari, P. & Nurmela, A., 2 Nov 2017, In: Materials at High Temperatures. 34, 5-6, p. 301-310

  Research output: Contribution to journal › Article › Scientific › peer-review
  1 Citation (Scopus)

• Multiaxial creep testing device for nuclear fuel claddings

  Pohja, R., Moilanen, P., Rantala, J., Huotilainen, S., Tulkki, V., Ehrnstén, U. & Holmström, S., 2016, In: Athens Journal of Sciences. 3, 3, p. 227-240

  Research output: Contribution to journal › Article › Scientific › peer-review

  Open Access

• Supercritical water oxidation and creep behaviour of boiler tube materials

  Tuurna, S., Yli-Olli, S., Pohja, R. & Penttilä, S., 2016, Proceedings of 8th International Conference on Advances in Materials Technology for Fossil Power Plants. ASM International, p. 924-930

  Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review