Creating the foundations for safe nuclear power in Finland – Thermal hydraulics, safety analyses, safety justification methods research at the LUT University, 2000–2023 | 2024 Publication type A1 Journal article (refereed), original research Author(s) Hyvärinen Juhani, Riikonen Vesa, Telkkä Joonas, Hujala Elina, Kouhia Virpi, Puustinen Markku, Patel Giteshkumar, Pyy Lauri, Vihavainen Juhani, Suikkanen Heikki, Rintala Ville Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
Experiments on open loop passive cooling of nuclear reactor containment: Quasi-steady-state heat removal, dynamic loads, and feasibility of practical periodic testing | 2024 Publication type A1 Journal article (refereed), original research Author(s) Telkkä Joonas, Riikonen Vesa, Kouhia Virpi, Puustinen Markku, Pyy Lauri, Räsänen Antti, Kotro Eetu, Hyvärinen Juhani Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
Helical coil steam generator stability experiments with the MOTEL test facility | 2024 Publication type A1 Journal article (refereed), original research Author(s) Riikonen Vesa, Telkkä Joonas, Kouhia Virpi, Puustinen Markku, Patel Giteshkumar, Pyy Lauri, Räsänen Antti, Kotro Eetu, Hyvärinen Juhani, Murad Afeef Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
APROS and TRACE Simulations of PWR PACTEL Experiment SBL-65 | 2023 Publication type Other Author(s) Kouhia Virpi, Karola Eero Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
APROS simulation of PWR PACTEL Nitrogen Experiment NCG-31 | 2023 Publication type Other Author(s) Kouhia Virpi Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
Passive heat exchanger experiments (PAHE) | 2023 Publication type D2 Article in a professional research book (incl. editor’s introduction) Author(s) Riikonen Vesa, Kouhia Virpi, Telkkä Joonas, Pyy Lauri Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
Pienreaktorien tutkimusta McSAFER EU-hankkeessa LUT-yliopiston MOTEL-laitteistolla | 2023 Publication type D1 Article in a trade journal Author(s) Telkkä Joonas, Suikkanen Heikki, Kouhia Virpi Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
PWR PACTEL tests (PATE) | 2023 Publication type D2 Article in a professional research book (incl. editor’s introduction) Author(s) Riikonen Vesa, Kouhia Virpi, Telkkä Joonas, Pyy Lauri, Räsänen Antti, Kotro Eetu Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
Thermal Hydraulic Experiments and Code Validation for LWR SMRs Within the European McSAFER Project: Overview of Activities and Current Status | 2023 Publication type A4 Conference proceedings Author(s) Suikkanen H., Telkkä J., Kouhia V., Gabriel S., Albrecht G., Heiler W., Heineken F., Sanchez-Espinoza V. H., Li H., Grishchenko D., Bencik M., Vyskocil L., Dolecek V., Queral C., Fernandez-Cosials K., Villegas L. Rueda, Schneidesch C. R. Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
Natural circulation experiment with the PASI facility – observations on phenomena with an open passive heat removal loop | 2022 Publication type A4 Conference proceedings Author(s) Riikonen Vesa, Kouhia Virpi, Telkkä Joonas, Hyvärinen Juhani Other Focus Area Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
Description of the MOTEL facility and instrumentation | 2021 Publication type Other Author(s) Tielinen K, Telkkä J, Kotro E, Kouhia V, Suikkanen H Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
PASI – A test facility for research on passive heat removal | 2021 Publication type A1 Journal article (refereed), original research Author(s) Kouhia Virpi, Riikonen Vesa, Kauppinen Otso-Pekka, Telkkä Joonas, Hyvärinen Juhani Nuclear Energy and Engineering LUT School of Energy Systems
PASI – A test facility for research on passive heat removal | 2021 Publication type A4 Conference proceedings Author(s) Kouhia Virpi, Riikonen Vesa, Kauppinen Otso-Pekka, Telkkä Joonas, Hyvärinen Juhani Nuclear Energy and Engineering LUT School of Energy Systems
PASI facility description for PASTELS | 2021 Publication type Other Author(s) Telkkä J, Kouhia V, Riikonen V, Karppinen J, Räsänen A, Kotro E Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
Passive heat exchanger experiments (PAHE) | 2021 Publication type D2 Article in a professional research book (incl. editor’s introduction) Author(s) Riikonen Vesa, Kouhia Virpi, Telkkä Joonas, Pyy Lauri Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
PWR PACTEL tests (PATE) | 2021 Publication type D2 Article in a professional research book (incl. editor’s introduction) Author(s) Riikonen Vesa, Kouhia Virpi, Pyy Lauri Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
PWR PACTEL Nitrogen Experiment NCG-30 | 2020 Publication type Other Author(s) Kouhia Virpi, Riikonen Vesa Nuclear Energy and Engineering LUT School of Energy Systems
Simulation of PWR PACTEL Nitrogen Experiment NCG-23 with APROS | 2020 Publication type Other Author(s) Kouhia Virpi Energy - Transition to carbon-neutral world Nuclear Energy and Engineering LUT School of Energy Systems
General description of the PWR PACTEL test facility – fourth edition | 2019 Publication type Other Author(s) Kouhia Virpi, Riikonen Vesa, Partanen Harri, Räsänen Antti, Kauppinen Otso-Pekka, Telkkä Joonas, Pyy Lauri, Tielinen Kimmo Nuclear Energy and Engineering Energy LUT School of Energy Systems
Integral and separate effects tests on thermal-hydraulic problems in reactors (INTEGRA) | 2019 Publication type D2 Article in a professional research book (incl. editor’s introduction) Author(s) Riikonen Vesa, Kouhia Virpi, Kauppinen Otso-Pekka, Telkkä Joonas Nuclear Energy and Engineering LUT School of Energy Systems
PASI - a test facility for research on passive heat removal | 2019 Publication type Other Author(s) Kouhia Virpi, Riikonen Vesa, Kauppinen Otso-Pekka, Telkkä Joonas, Hyvärinen Juhani Nuclear Energy and Engineering LUT School of Energy Systems
PASI test plans | 2019 Publication type Other Author(s) Riikonen Vesa, Purhonen Heikki, Kauppinen Otso-Pekka, Kouhia Virpi, Telkkä Joonas, Räsänen Antti, Kotro Eetu, Tielinen Kimmo
Plans for the PWR PACTEL nitrogen effect tests, PATE 4/2019 | 2019 Publication type Other Author(s) Riikonen Vesa, Kouhia Virpi Nuclear Energy and Engineering Energy LUT School of Energy Systems
System code analysis of accumulator nitrogen discharge during LOCA experiment at PWR PACTEL test facility | 2019 Publication type A1 Journal article (refereed), original research Author(s) Kauppinen Otso-Pekka, Kouhia Virpi, Riikonen Vesa, Hyvärinen Juhani
Experimental observation of adverse and beneficial effects of nitrogen on reactor core cooling | 2018 Publication type A1 Journal article (refereed), original research Author(s) Riikonen Vesa, Kouhia Virpi, Kauppinen Otso-Pekka, Sjövall Heikki, Hyvärinen Juhani
General description of the PASI test facility, INTEGRA 1/2017, Research Report | 2018 Publication type Other Author(s) Telkkä Joonas, Kouhia Virpi, Partanen Harri, Räsänen Antti, Kauppinen Otso-Pekka, Kotro Eetu, Saure Ilkka Nuclear Energy and Engineering LUT School of Energy Systems
General description of the PASI test facility, second edition | 2018 Publication type Other Author(s) Kouhia Virpi, Riikonen Vesa, Telkkä Joonas, Partanen Harri, Räsänen Antti, Kauppinen Otso-Pekka, Kotro Eetu, Saure Ilkka, Tielinen Kimmo, Karppinen Juha Nuclear Energy and Engineering Energy LUT School of Energy Systems
PASI facility – characterizing experiments | 2018 Publication type Other Author(s) Kouhia Virpi, Riikonen Vesa Nuclear Energy and Engineering Energy LUT School of Energy Systems
PWR PACTEL pump trip experiments | 2018 Publication type Other Author(s) Riikonen Vesa, Kouhia Virpi, Kauppinen Otso-Pekka Nuclear Energy and Engineering Energy LUT School of Energy Systems
Simulation of PWR PACTEL Pump Trip Experiment with APROS code | 2018 Publication type Other Author(s) Kouhia Virpi Nuclear Energy and Engineering Energy LUT School of Energy Systems
ESSANUF D5.6 – Thermal-hydraulic design methodology for licensing VVER-440 fuel in Finland | 2017 Publication type Other Author(s) Kauppinen Otso-Pekka, Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
Integral and separate effects tests on thermal-hydraulic problems in reactors (INTEGRA) | 2017 Publication type D2 Article in a professional research book (incl. editor’s introduction) Author(s) Riikonen Vesa, Kouhia Virpi, Kauppinen Otso-Pekka, Telkkä Joonas Nuclear Energy and Engineering Energy LUT School of Energy Systems
Simulations of PWR PACTEL nitrogen experiments | 2017 Publication type Other Author(s) Kouhia Virpi, Kauppinen Otso-Pekka
Facility for research on passive heat removal | 2016 Publication type Other Author(s) Telkkä Joonas, Kauppinen Otso-Pekka, Kouhia Virpi, Partanen Harri Nuclear Energy and Engineering Energy LUT School of Energy Systems
Lappeenrannassa keitetty vettä ja lauhdutettu höyryä ydinturvallisuuden nimissä jo 1970-luvun puolivälistä alkaen | 2016 Publication type D1 Article in a trade journal Author(s) Purhonen Heikki, Kouhia Virpi Nuclear Energy and Engineering Energy LUT School of Energy Systems
PWR PACTEL nitrogen experiments | 2016 Publication type Other Author(s) Riikonen Vesa, Kouhia Virpi, Kauppinen Otso-Pekka
PWR PACTEL typpikokeiden alustava koesuunnitelma | 2016 Publication type Other Author(s) Riikonen Vesa, Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
Review on factors affecting the operation of passive heat removal circuits | 2016 Publication type Other Author(s) Kouhia Virpi, Kauppinen Otso-Pekka Nuclear Energy and Engineering LUT School of Energy Systems
ANALYSIS OF REVERSE FLOW IN LOW-RISE INVERTED U-TUBE STEAM GENERATOR OF PWR PACTEL FACILITY | 2015 Publication type A4 Conference proceedings Author(s) Kauppinen Otso-Pekka, Riikonen Vesa, Kouhia Virpi, Hyvärinen Juhani Energy Engineering LUT School of Energy Systems
Computer analyses on loop seal clearing experiment at PWR PACTEL | 2015 Publication type A1 Journal article (refereed), original research Author(s) Kauppinen Otso-Pekka, Kouhia Virpi, Riikonen Vesa, Hyvärinen Juhani, Sjövall Heikki Nuclear Energy and Engineering LUT School of Energy Systems
PWR PACTEL experiments (PAX) | 2015 Publication type D3 Professional conference proceedings Author(s) Riikonen Vesa, Kouhia Virpi, Kauppinen Otso-Pekka, Telkkä Joonas, Purhonen Heikki Nuclear Energy and Engineering LUT School of Energy Systems
PWR PACTEL flow reversal experiments | 2015 Publication type Other Author(s) Riikonen Vesa, Kouhia Virpi, Kauppinen Otso-Pekka Nuclear Energy and Engineering LUT School of Energy Systems
Review on code validation matrices for identification of reproducible test cases | 2015 Publication type Other Author(s) Kouhia Virpi, Purhonen Heikki Nuclear Energy and Engineering LUT School of Energy Systems
General description of the PWR PACTEL test facility - third edition, Technical report, PAX 2/2014 | 2014 Publication type D4 Published development or research report or study Author(s) Kouhia Virpi, Riikonen Vesa, Partanen Harri, Räsänen Antti, Kauppinen Otso-Pekka, Telkkä Joonas, Pyy Lauri Nuclear Energy and Engineering LUT School of Energy Systems
Paul Scherrer Institute - National center of competence | 2014 Publication type D1 Article in a trade journal Author(s) Alaheikkilä Jarmo, Kouhia Virpi, Loukusa Henri, Papakonstantinou Nikolaos Nuclear Energy and Engineering LUT School of Energy Systems
Simulations on PWR PACTEL CNC and SBO experiments, Research Report, PAX 3/2014 | 2014 Publication type D4 Published development or research report or study Author(s) Kouhia Virpi, Kauppinen Otso-Pekka, Riikonen Vesa Nuclear Energy and Engineering LUT School of Energy Systems
Station blackout experiments, Research Report, PAX 1/2014 | 2014 Publication type D4 Published development or research report or study Author(s) Riikonen Vesa, Kouhia Virpi, Kauppinen Otso-Pekka Nuclear Energy and Engineering LUT School of Energy Systems
Benchmark exercise on SBLOCA experiment of PWR PACTEL facility | 2013 Publication type A1 Journal article (refereed), original research Author(s) Kouhia Virpi, Riikonen Vesa, Kauppinen Otso-Pekka, Purhonen Heikki, Austregesilo Henrique, Bánáti József, Cherubini Marco, D'Auria Francesco, Inkinen Pasi, Karppinen Ismo, Kral Pavel, Peltokorpi Lauri, Peltonen Joanna, Weber Sebastian Nuclear Energy and Engineering LUT School of Energy Systems
Cool down under Natural Circulation Conditions in Presence of Secondary side Isolated Steam Generators, Research Report, PAX 1/2013 | 2013 Publication type D4 Published development or research report or study Author(s) Riikonen Vesa, Kouhia Virpi, Kauppinen Otso-Pekka Nuclear Energy and Engineering LUT School of Energy Systems
General description of the PWR PACTEL test facility, the second edition, Technical report, PAX 2/2013 | 2013 Publication type D4 Published development or research report or study Author(s) Kouhia Virpi, Riikonen Vesa, Partanen Harri, Räsänen Antti, Kauppinen Otso-Pekka, Telkkä Joonas, Pyy Lauri Nuclear Energy and Engineering LUT School of Energy Systems
PWR PACTEL experiments (PAX) | 2013 Publication type D3 Professional conference proceedings Author(s) Riikonen Vesa, Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
Three-dimensional CFD model of a NPP steam generator | 2013 Publication type A4 Conference proceedings Author(s) Pättikangas Timo, Hovi Ville, Niemi Jarto, Riikonen Vesa, Kouhia Virpi, Purhonen Heikki Nuclear Energy and Engineering LUT School of Energy Systems
Validation of RELAP5/mod3.3 against the PACTEL SBL-50 benchmark transient | 2013 Publication type A4 Conference proceedings Author(s) Bánáti József, Riikonen Vesa, Kouhia Virpi, Purhonen Heikki Nuclear Energy and Engineering LUT School of Energy Systems
Loop seal experiments with PWR PACTEL, Research Report, PAX 1/2012 | 2012 Publication type D4 Published development or research report or study Author(s) Riikonen Vesa, Kouhia Virpi, Kauppinen Otso-Pekka Nuclear Energy and Engineering LUT School of Energy Systems
PACTEL and PWR PACTEL Test Facilities for Versatile LWR Applications | 2012 Publication type A1 Journal article (refereed), original research Author(s) Kouhia Virpi, Purhonen Heikki, Riikonen Vesa, Puustinen Markku, Kyrki-Rajamäki Riitta, Vihavainen Juhani Nuclear Energy and Engineering LUT School of Energy Systems
Passive safety system simulation (PASSIMU): PASSIMU summary report | 2011 Publication type D4 Published development or research report or study Author(s) Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
Possibilities in Experimental Research on Evaluation of Passive Safety Systems, Research report, PASSIMU 2/2010 | 2011 Publication type D4 Published development or research report or study Author(s) Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
PWR PACTEL experiments at low pressures, Research Report, PAX 3/2011 | 2011 Publication type D4 Published development or research report or study Author(s) Riikonen Vesa, Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
Simulations of Experiments on Start of Natural Circulation and Long Term Cooling, Research report, PASSIMU 1/2010 | 2011 Publication type D4 Published development or research report or study Author(s) Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
Study of flow reversing in vertical heat exchange tubes, PAX 4/2011 | 2011 Publication type D4 Published development or research report or study Author(s) Riikonen Vesa, Kouhia Virpi, Vihavainen Juhani Nuclear Energy and Engineering LUT School of Energy Systems
Summary Report OF PWR PACTEL Benchmark Experiment Blind Calculations, Research report, PAX 1/2011 | 2011 Publication type D4 Published development or research report or study Author(s) Riikonen Vesa, Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
Summary Report of PWR PACTEL Benchmark Experiment Open Calculations, Research report, PAX 2/2011 | 2011 Publication type D4 Published development or research report or study Author(s) Riikonen Vesa, Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
A New Integral Facility PWR PACTEL for Vertical Steam Generator Simulation | 2010 Publication type A4 Conference proceedings Author(s) Rantakaulio Antti, Kouhia Virpi, Riikonen Vesa, Räsänen Antti, Purhonen Heikki, Kyrki-Rajamäki Riitta Nuclear Energy and Engineering LUT School of Energy Systems
New possibilities to simulate vertical steam generators with integral facility PWR PACTEL | 2010 Publication type A4 Conference proceedings Author(s) Kouhia Virpi, Kyrki-Rajamäki Riitta, Purhonen Heikki, Rantakaulio Antti, Riikonen Vesa, Räsänen Antti Nuclear Energy and Engineering LUT School of Energy Systems
Review of Designs and Validation Aspects of Passive Safety Systems in Advanced Nuclear Power Plant Concepts, Research Report, PASSIMU 1/2009 | 2010 Publication type D4 Published development or research report or study Author(s) Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
General description of the PWR PACTEL test facility, Research Report, YTY 1/2009 | 2009 Publication type D4 Published development or research report or study Author(s) Riikonen Vesa, Kouhia Virpi, Räsänen Antti, Partanen Harri Nuclear Energy and Engineering LUT School of Energy Systems
Lappeenrannassa kaikki Suomen laitokset samassa hallissa | 2009 Publication type D1 Article in a trade journal Author(s) Rantakaulio Antti, Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
PWR PACTEL -koelaitteistoprojekti: uusin “lappeenrantalaismissio” | 2007 Publication type D1 Article in a trade journal Author(s) Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
PACO Project, Summary of pre-analysis 2004-2005, YTY 1/2006 | 2006 Publication type D4 Published development or research report or study Author(s) Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
PACTEL OECD project planning (PACO) | 2006 Publication type D4 Published development or research report or study Author(s) Kouhia Virpi, Purhonen Heikki Nuclear Energy and Engineering LUT School of Energy Systems
Research and education of nuclear energy in Finland | 2000 Publication type A4 Conference proceedings Author(s) Kalli Heikki, Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
Trip Of Main Circulation Pumps Of RBMK-1500 Calculated With Thermal-Hydraulic Code CATHARE2 V1.3L | 2000 Publication type A4 Conference proceedings Author(s) Jasiulevicius Audrius, Kouhia Virpi, Sarrette Christine Nuclear Energy and Engineering LUT School of Energy Systems
Ydinenergia-alan koulutustarve tulevaisuudessa – yksinkertainen arviointimalli | 2000 Publication type D4 Published development or research report or study Author(s) Kalli Heikki, Kouhia Virpi Nuclear Energy and Engineering LUT School of Energy Systems
Naisten lukumäärä alalla on edelleen pieni | 1998 Publication type D1 Article in a trade journal Author(s) Kouhia Virpi, Hinkula Liisa Nuclear Energy and Engineering LUT School of Energy Systems
The European Nuclear Society Young Generation Position Paper on the future need for nuclear energy | 1998 Publication type B1 Unrefereed journal article Author(s) Cepin Marko, Dominguez Maria Del Mar, Frepoli Cesare, Gisbertz Astrid, Kouhia Virpi, Miazza Patrick, Meskens Gaston, Parisot Laure, Paulsen Dorte Eide, Pearson Sharron, Rapavy Stanislav, Stavervik Patricia, Stepanek Tomas, Tsyboulia Alexandre, Van den Berg Rob Nuclear Energy and Engineering LUT School of Energy Systems
About Technical Possibility to Use VEERA Facility for Investigation of Coolant Stratification Phenomena in Horizontal Steam Generators | 1997 Publication type A4 Conference proceedings Author(s) Mitioukov Valeri, Mitrioukhine Andrei, Korteniemi Virpi Nuclear Energy and Engineering LUT School of Energy Systems
Young Finnish nuclear engineers touring France 1.-8.12.1996 | 1997 Publication type D1 Article in a trade journal Author(s) Korteniemi Virpi, Tanner Vesa Nuclear Energy and Engineering LUT School of Energy Systems
RBMK-reaktorit tutkimuskohteena, Länsimaisten simulointiohjelmien soveltuvuutta testataan | 1996 Publication type D1 Article in a trade journal Author(s) Korteniemi Virpi Nuclear Energy and Engineering LUT School of Energy Systems
Analyses of the PACTEL loss-of-feedwater experiments | 1995 Publication type A4 Conference proceedings Author(s) Korteniemi Virpi, Virtanen Eero, Haapalehto Timo, Kouhia Jyrki Nuclear Energy and Engineering LUT School of Energy Systems
Analysis of Horizontal Steam Generator Loss of Feed Water Experiments | 1995 Publication type A4 Conference proceedings Author(s) Korteniemi Virpi, Virtanen Eero, Aaltonen Timo, Haapalehto Timo, Tuunanen Jari, Kouhia Jyrki Nuclear Energy and Engineering LUT School of Energy Systems
Reflooding and Boil-off Experiments in VVER-440 Like Rod Bundle and analyses with the CATHARE Code | 1995 Publication type A4 Conference proceedings Author(s) Korteniemi Virpi, Haapalehto Timo, Puustinen Markku Nuclear Energy and Engineering LUT School of Energy Systems
Ydintekniikkaa Tonavan rannalla ja Budan kukkuloilla | 1995 Publication type D1 Article in a trade journal Author(s) Korteniemi Virpi, Ritonummi Timo Nuclear Energy and Engineering LUT School of Energy Systems
Painevesireaktorin sauvanipun hätäjäähdytyskokeiden analyysi | 1994 Publication type G2 Master’s thesis, polytechnic Master’s thesis Author(s) Korteniemi Virpi Nuclear Energy and Engineering LUT School of Energy Systems
The Nucleus in Finland - the second report | 1993 Publication type D1 Article in a trade journal Author(s) Aurela Jorma, Korteniemi Virpi, Halme-Tapanainen Kristina Nuclear Energy and Engineering LUT School of Energy Systems