Projektitutkija Joonas Telkkä

E-mail: Joonas.Telkka@lut.fi
Mobile phone: +358 50 375 7765
CV:
Uploaded on: 29/10/2019

Current Organisation
Nuclear Safety Research Unit (Superior organisation: Laboratory of Energy Technology)

Research Interest
Experimental thermal hydraulics is needed to increase knowledge on functioning of nuclear power plants (NPP) and thus to enhance the safety of NPPs. Test facilities at LUT nuclear safety research laboratory are used either to ensure the functioning of safety systems of NPPs or to gain data for the validation of the computer codes. These codes are used to analyze the safety features of light water reactors. In the doctoral research advanced measurement techniques are used to acquire more information on thermal hydraulics of NPPs. Among these are particle image velocimetry (PIV) and wire mesh sensors (WMS).

Particle image velocimetry is a flow visualization technique, which allows for capturing velocity information of flow fields. PIV is based on illuminating of small tracer particles added to the flow with a laser apparatus. The movement of these illuminated particles is recorded with a camera system and converted into velocity information with a data acquisition system.

Wire mesh sensors are used to gain information on multiphase flows. WMS is based on the difference of multiphase flow phases regarding an electrical property, i.e. conductivity or permittivity/capacitance. WMS can be used to determine void fraction distributions, bubble size distributions and velocity distributions of multiphase flows.

Teaching Experience
Nuclear energy, nuclear power plant engineering, (experimental) thermal hydraulics.

Projects as Project Manager
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PAssive Systems: Simulating the Thermal-hydraulics with ExperimentaL Studies (01/09/2020 - 29/02/2024)
Funder: European Commission
Development of Thermal-hydraulic Infrastructure at LUT (01/01/2018 - 31/03/2019)
Funder: Other Finnish
Development of Thermal-hydraulic Infrastructure at LUT (01/01/2017 - 31/03/2018)
Funder: Other Finnish


Projects as Co-Investigator
Advanced PTS Analysis for LTO (01/10/2020 - 30/09/2024)
Funder: European Commission


Publications
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Facility for research on passive heat removal (2016)
Other
Telkkä Joonas, Kauppinen Otso-Pekka, Kouhia Virpi, et al.
SAFIR2018 Programme - The Finnish Research Programme on Nuclear Power Plant Safety 2015 - 2018, http://safir2018.vtt.fi.
Research based requirements of MOTEL (2016)
Other
Telkkä Joonas, Hyvärinen Juhani
SAFIR2018 Programme - The Finnish Research Programme on Nuclear Power Plant Safety 2015 - 2018, http://safir2018.vtt.fi.
Status report on the advances in thermal hydraulic measurements (2016)
Other
Telkkä Joonas, Hujala Elina, Pyy Lauri
SAFIR2018 Programme - The Finnish Research Programme on Nuclear Power Plant Safety 2015 - 2018, http://safir2018.vtt.fi.
PWR PACTEL experiments (PAX) (2015)
D3 Professional conference proceedings
Riikonen Vesa, Kouhia Virpi, Kauppinen Otso-Pekka, et al.
VTT Technology. SAFIR2014 - The Finnish Research Programme on Nuclear Power Plant Safety 2011-2014, Final Report, VTT Technology 213
General description of the PWR PACTEL test facility - third edition, Technical report, PAX 2/2014 (2014)
D4 Published development or research report or study
Kouhia Virpi, Riikonen Vesa, Partanen Harri, et al.
Report on the status of new measuring systems (2014)
Other
Ylönen Arto, Pyy Lauri, Telkkä Joonas
General description of the PWR PACTEL test facility, the second edition, Technical report, PAX 2/2013 (2013)
D4 Published development or research report or study
Kouhia Virpi, Riikonen Vesa, Partanen Harri, et al.



Last updated on 2019-29-10 at 03:02