Embrittlement Trend Curves and Reactor Pressure Vessel Operation in Finland

Autor: Seppänen, Tommi, Lindqvist, Sebastian, Arffman, Pentti, Lappalainen, Petteri

Publikováno v: Seppänen, T, Lindqvist, S, Arffman, P & Lappalainen, P 2023, Embrittlement Trend Curves and Reactor Pressure Vessel Operation in Finland . in W L Server, M Brumovský & M Kirk (eds), Radiation Embrittlement Trend Curves and Equations and Their Use for RPV Integrity Evaluations . American Society for Testing and Materials (ASTM), pp. 259-283, ASTM Symposium on Radiation Embrittlement Trend Curves/Equations and Their Use for RPV Integrity Evaluations, Prague, Czech Republic, 19/04/23 . https://doi.org/10.1520/STP164720220038

To evaluate embrittlement from neutron irradiation, Finnish regulations have required the use of surveillance programs in light water reactors since the 1970s. These are applied in the five operating reactors: two VVER-440s at Loviisa (LO1 and LO2),

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https://cris.vtt.fi/en/publications/42cea55c-193e-42c0-acb0-898b5fc0567b

Effect Of Thermal Aging On The Microstructure And Mechanical Properties Of High-Ni And Ni-Base Alloys

Autor: Huotilainen, Caitlin, Que, Zaiqing, Ge, Yanling, Lappalainen, Petteri, Hytönen, Noora, Korhonen, Ritva, Huotilainen, Santtu, Kytömöki, Petri

Publikováno v: Huotilainen, C, Que, Z, Ge, Y, Lappalainen, P, Hytönen, N, Korhonen, R, Huotilainen, S & Kytömöki, P 2022, Effect Of Thermal Aging On The Microstructure And Mechanical Properties Of High-Ni And Ni-Base Alloys . in AMPP Conference Papers . Association for Materials Protection and Performance, AMPP, 20th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactor, Snowmass, Colorado, United States, 17/07/22 .

The long-term exposure of metallic structures, systems and components to power plant operating temperatures can lead to thermal aging and subsequent degradation. In a VVER-type pressurized water reactor, high-nickel alloys are used in some high-stren

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https://cris.vtt.fi/en/publications/12479ffe-71b2-47fe-915a-89d41fd257c3

Electrical resistivity response to annealing of VVER440-type weld material in irradiated, post-irradiation annealed and re-irradiated conditions

Autor: Valo, Matti, Lappalainen, Petteri

Publikováno v: Valo, M & Lappalainen, P 2015, Electrical resistivity response to annealing of VVER440-type weld material in irradiated, post-irradiation annealed and re-irradiated conditions . VTT Research Report, vol. VTT-R-00163-15, VTT Technical Research Centre of Finland .

In the work resistivity response to annealing of weld 501 materials in various irradiationannealing-reirradiation conditions was measured by using isothermal annealing. Annealing temperature of 420°C was chosen in order to get relatively slow anneal

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https://cris.vtt.fi/en/publications/b022d5da-e31d-4cce-9d94-78bec4abbf54

Validation of melting temperatures of temperature monitoring alloys by DSC

Autor: Lappalainen, Petteri, Talja, Riku, Valo, Matti

Publikováno v: Lappalainen, P, Talja, R & Valo, M 2015, Validation of melting temperatures of temperature monitoring alloys by DSC . VTT Research Report, vol. VTT-R-00162-15, VTT Technical Research Centre of Finland .

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https://cris.vtt.fi/en/publications/d4fdaa51-7b2b-447e-b103-f639cdba1712

Advanced surveillance technique and embrittlement modelling (SURVIVE)

Autor: Valo, Matti, Lappalainen, Petteri, Lyytikäinen, Tuomo, Lydman, Jari, Paasila, Marko

Publikováno v: Valo, M, Lappalainen, P, Lyytikäinen, T, Lydman, J & Paasila, M 2013, Advanced surveillance technique and embrittlement modelling (SURVIVE) . in SAFIR2014: The Finnish Research Programme on Nuclear Power Plant Safety 2011-2014 : Interim Report . VTT Technical Research Centre of Finland, Espoo, VTT Technology, no. 80, pp. 313-323 . < https://publications.vtt.fi/pdf/technology/2013/T80.pdf#page=315 >

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https://cris.vtt.fi/en/publications/bcd90d63-b444-470e-8f09-2aa7b66fef80