Conference timetable

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DAY 1 Tuesday February 23rd 2021

8:00 – 8:45Registration / networking
Tea and coffee on arrival
On-line delegates join
8:45 – 9:00Welcome, safety briefing and IT familiarisationVUEZ and chair
9:00 – 12:10General sessionKeynote addresses
Chairs: L. E. Herranz, A. Bentaib
9:00 – 9:25J. L. Hernandenz (IAEA)Reactor core and containment cooling systems regulatory aspects from IAEA standards
9:25 – 9:50B. Tournaire (EDF, France)Reactor core and containment cooling issues in DBA and SA-Differences – PWR
9:50 – 10:15C. Lorencez (Ontario Power Generation, Canada)SAMG Long Term Core and Containment Cooling Strategy Application and Management in Canadian NPPs
10:15 – 10:30Refreshment Break and Networking
10:30 – 10:55Ch. He (CNPRI, China)Long term management strategies of containment pressure control during severe accidents
10:55 – 11:20BWROG (TBD)
11:20 – 11:45H. Esmaili (US-NRC, USA)Post – Fukushima Severe Accident Research Activities at NRC – Containment Vents and Hydrogen Control
11:45 – 12:10S. Mizokami (TEPCO, Japan)Lessons learned from 1F accident by focusing on the long term cooling
12:10 – 14:00Lunch, networking
14:00 – 17:00Session 1Assesment of accident management measures and strategies
Chairs: A. Tehrani, N. Mesmous
14:00 – 14:20A. Amri, M. Gajdoš (IAEA)Current Perspectives of the Concept of the Safe State in Accident Management Considerations in the IAEA Safety Standards
14:20 – 14:40P. Kral, J. Krhounkova, F. Lahovsky, M. Bencik (UJV Rez, Czech Republic)Safety Analyses of Events Starting from Shutdown Modes of VVER
14:40 – 15:00P. Groudev, P. Vryashkova, I. Ivanov, K. Filipov (INRE, Bulgaria)Analysis of the Existing VVER-1000’ Severe Accident Management Strategy for Core Cooling and View on Improvement Opportunities, relating to Kozloduy NPP in Bulgaria
15:00 – 15:20K. Heckmann, M. Sonnenkalb, J. Sievers, T. Steinrotter, S. Palazzo, J. Arndt, C. Blasius (GRS, Germany)Review and Perspective of GRS’ Long Term Accident Analyses with Consideration of Structure Mechanical Aspects
15:20 – 15:40Refreshment Break and Networking
15:40 – 16:00L. E. Herranz, R. Bocanegra (CEIMAT, Spain)Long term containment cooling in Fukushima Unit 1: consequences and sensitivity
16:00 – 16:20M. Petric (Slovenske elektrarne, Slovak republic)Review of Actual Bohunice NPP Core and Containment Cooling Systems Design
16:20 – 16:40Y. Zhang, Y. Lu, X. Yun, H. Zhang (CNPRI, China)Experimental and Numerical Study on Wall Condensation in a Large-Scale Containment Test Facility
16:40 – 17:00M. Di Giuli, P. Dejardin, M. Auglaire (Tractebel Engineering SA Engie, Belgium)Assessment of long-term containment conditions using MELCOR and ASTEC codes
17:00 – 18:00Session 2New systems and designs
Chairs: L. Kubisova, SCM (TBD)
17:00 – 17:20R. Park, S. Kim (KAERI, South Korea)Development of severe accident mitigation system and technology for Korean small integral reactor
17:20 – 17:40P. Matejovic, M. Barnak, Z. Tuma (Dukovany NPP, Czech republic)VVER-440/V213 containment cooling system for severe accidents
17:40 – 18:00G. Lajtha, E. Toth, L. Tarczal, T. Siklossy (NUBIKI, Hungary)Challenges in the Design of Long Term Containment Cooling System at Paks NPP
18:00Seminar Day 1 closes

DAY 2 Wednesday February 24th 2021

9:00 – 10:20Session 3New systems and designs
Chairs: L. Kubisova, SCM (TBD)
9:00 – 9:20M. Hupp, M. Braun, N. Losch (Framatome, Germany)Fully passive long term containment cooling of VVER440-V213 reactors
9:20 – 9:40A. K. Deo, R. S. Rao, A. J. Gaikwad, L. R. Bishnoi (AERB, India)Long Term Passive Containment Heat Removal System for a typical PHWR
9:40 – 10:00O. Kocharyants, O. Mazurok, V. Ivanov, O. Mihaylenko (ESG, Ukraine)Study of the additional upgrades implementation for long-term heat removal from the containment of NPP with VVER-1000 reactor
10:00 – 10:20O. Kocharyants, O. Mazurok, V. Ivanov, O. Mihaylenko (ESG, Ukraine)Study of the additional upgrades implementation for long-term heat removal from the confinement of NPP with VVER-440 reactor
10:20 – 11:00Refreshment Break and Networking
11:00 – 15:00Session 4Debris formation and chemical conditions in cooling water
Chairs: D. Jacquemain, SCM (TBD)
11:00 – 11:20W. Kikuchi, A. Hotta, A. Morita (NRA, Japan)Extension of molten jet breakup evaluation code JBREAK by improving droplet agglomeration model and validation based on DEFOR-A test
11:20 – 11:40A. Hotta, W. Kikuchi (NRA, Japan)Extension of debris bed cooling evaluation code DPCOOL for evaluating uncertainties in long-term debris coolability
11:40 – 12:00N. L. Kharitonova, S. A. Gurbanova (SEC – NRS, Russia)Assessment of Boric Acid Compounds Solubility at VVER’s Primary Coolant Conditions
12:00 – 14:00Lunch, networking
14:00 – 14:20T. Matsumoto, Y. Iwasawa, T. Sugiyama (JAEA, Japan)Development of evaluation framework for ex-vessel core coolability
14:20 – 14:40F. Forgues, J. Spencer (CNL, Canada)Simulation of Potential Ex-Vessel Corium Behaviour during a CANDU Reactor Severe Accident using MELTSPREAD and CORQUENCH Codes
14:40 – 15:00R. Nagaishi, T. Ito, R. Kuwano (JAEA, Japan)Radiation-chemical consideration of effect of seawater for cooling reactor cores at severe accident on structural material corrosion
15:00 – 15:30Refreshment Break and Networking
15:30 – 17:10Session 5Some clogging issues
Chairs: B. Tourniaire, I. Vicena
15:30 – 15:50G. Repetto, B. Migot, V. Soltesz (IRSN, France, VUEZ, Slovakia)VIKTORIA experiments on sump filtration during Loss of Coolant Accident
15:50 – 16:10J. F. Trigeol. E. Pariaud, E. Dixneuf, A. Duprat, G. Repetto (IRSN, France)Lifetime extension of 900MWe NPPs: French TSO main conclusions regarding long term sump performance after a loss of coolant accident
16:10 – 16:30G. Cenerino, L. Cantrel, V. Soltesz (IRSN, France, VUEZ, Slovakia)Lifetime extension of French 900 MWe NPPs: French TSO main conclusions regarding long term sump performance during a severe accident
16:30 – 16:50A. Bersano, G.Agnello, F. D´Auria, E. Zio, F. Mascari (ENEA, Italy)REPAS application on sump clogging issue in long term core cooling
16:50 – 17:10C. Alvarez, W. Le Saux, M. Pradier, L. Bosland, L. Cantrel, M. O. Simonot (IRSN, France)Analytical tests to study potential chemical effects on sump clogging
17:10 – 18:00Poster Session
18:00Seminar Day 1 closes
19:00Social Event – Dinner

—DAY 3 – Thursday February 25th 2021

9:00 – 13:00Concluding sessionSynthesis of technical discussions and needs for further research
Chairs: D. Jacquemain, A. Bentaib
9:00 – 9:15Summary and outcomes of general session
9:15 – 9:30Summary and outcomes of session 1
9:30 – 9:45Summary and outcomes of session 2
9:45 – 10:00Summary and outcomes of session 3
10:00 – 10:15Summary and outcomes of session 4
10:15 – 10:30Summary and outcomes of session 5
10:30 – 11:00Refreshment Break and Networking
11:00 – 12:00Wrap-up & DiscussionsNeeds for further research
12:00 – 13:00Lunch
13:00 – 15:00Visit of VUEZ facilities
15:00Workshop closes