Details for SA-Related Topic / Phenomenon:

debris bed

Ex-Vessel Debris Cooling - (EVDC) (4)

Facility Name	Test Identification	Measured Parameters	Modelling	Simulation Code	Experimental Research Program	Country
POMECO	POMECO	Debris bed temperature during quenching with top and bottom flooding	Dryout heat flux	Lipinski’s model for dryout heat flux	National program "Accident Phenomena of Risk Importance" (APRI) supported by consortium of SSM and NPPs in Sweden
▼ Show/Hide Additional Details References: [1] A. K. Nayak, B.R. Sehgal, A.V. Stepanyan. An experimental study on quenching of a radially stratified heated porous bed. Nucl. Eng. Des.236 (2006) 2189–2198 [2] M.J. Konovalikhin, B.R. Sehgal, 2001. Investigation of volumetrically heated debris bed quenching. Proc. ICONE-9, Nice, France, 8-12 April. [3] A Review of Dryout Heat Fluxes and Coolability of Particle Beds. SKI Report 02:17 [https://www.stralsakerhetsmyndigheten.se/contentassets/df03b94d31d94aef9957b294a507b599/0217-a-review-of-dryout-heat-fluxes-and-coolability-of-particle-beds]. [4] B.R. Sehgal, A. Jasiulevicius, M. Konovalikhin, Investigation of the Potential for In-Vessel Melt Retention in the Lower Head of a BWR by Cooling through the Control Rod Guide Tubes. SKI Report 2004:51. [https://www.stralsakerhetsmyndigheten.se/contentassets/cdc3f960f1f146eaba40d4fe1ed8df24/200451-investigation-of-the-potential-for-in-vessel-melt-retention-in-the-lower-head-of-a-bwr-by-cooling-through-the-control-rod-guide-tubes] Contributed By: A. Komlev, W. Ma IP/Copyright Situation: None
POMECO-FL	POMECO-FL	Pressure gradient of water flow, air flow. Presure drop of Two-Phase flow	Pressure gradient of water flow, air flow. Presure drop of Two-Phase flow	Pressure gradient by Lipinski, Reed, Shulenberg and Muller, hu and Theofanous	National program "Accident Phenomena of Risk Importance" (APRI) supported by consortium of SSM and NPPs in Sweden, ENSI
▼ Show/Hide Additional Details References: [1] L. Li. W. Ma. 2011. Experimental study on the effective particle diameter of a packed bed with non-spherical particles. Transport in Porous Media 89, 35-48. [2] L. Li., W. Ma. 2011. Experimental characterization of effective particle diameter of a packed bed with multi-diameter spheres. Nucl. Eng. Des. 241(5), 1736-1745. [3] L. Li, S. Gong, W. Ma. 2012. An experimental study on two-phase flow regime and pressure drop in a particulate bed packed with multi-diameter particles. Nucl. Technol. 177, 107-118. Contributed By: A. Komlev, W. Ma IP/Copyright Situation: None
POMECO-HT	POMECO-HT	Debris bed temperature, dryout location, incoming water flow	Dryout power, dryout location	COCOMO	National program "Accident Phenomena of Risk Importance" (APRI) supported by consortium of SSM and NPPs in Sweden, ENSI
▼ Show/Hide Additional Details References: [1] S. Thakre, L. Li, W. Ma. An experimental study on coolability of a particulate bed with radialstratification or triangular shape. Nuclear Engineering and Design 276 (2014) 54–63 [2] L. Li., W. Ma. S. Thakre. An experimental study on pressure drop and dryout heat flux of two-phase flow in packed beds of multi-sized and irregular particles, Nucl. Eng. Des. 242 (2012) 369-378. Contributed By: A. Komlev, W. Ma IP/Copyright Situation: None Link to PIRT:
SIMECO Debris Dryout/Remelting	Debris dryout / remelting	Debris bed temperature, dryout location, incoming water flow, video observation	Dryout power, dryout location	COCOMO	National program "Accident Phenomena of Risk Importance" (APRI) supported by consortium of SSM and NPPs in Sweden, ENSI, CNPE
▼ Show/Hide Additional Details References: [1] Y. Xiang, A. Komlev, Y Chen, W. Ma, W. Villanueva, A. Konovalenko, S. Bechta. Pre-test simulation and a scoping test for dryout and remelting phenomena of an in-vessel debris bed. Nuclear Engineering and Design 403 (2023) 112143. Contributed By: A. Komlev IP/Copyright Situation: To be checked

Ex-Vessel Fuel Coolant Interaction - (EVFCI) (3)

Facility Name	Test Identification	Measured Parameters	Modelling	Simulation Code	Experimental Research Program	Country
DEFOR-A	A23 - 27	Debris bed 3D scanning, agglomeration fraction as pool depth function, particle size distribution as pool depth function, debris bed porosity estimate	Melt jet breakup	JBREAK; CLSVOF; COCOMO	(i) Experimental program "Invstigation of Cooling Phenomena of High Temperature Molten Core" for Nuclear regulation Authority (NRA) of Japan; (ii) EU SAFEST; National program "Accident Phenomena of Risk Importance" (APRI) supported by consortium of SSM an
▼ Show/Hide Additional Details References: Akitoshi Hotta, Miyuki Akiba, Akinobu Morita, Alexander Konovalenko, Walter Villanueva, Sevostian Bechta, Andrei Komlev, Sachin Thakre, Seyed Mohsen Hoseyni, Per Sköld, Toshinori Matsumoto, Tomoyuki Sugiyama & Michael Buck, “Experimental and Analytical Investigation of Formation and Cooling Phenomena in High Temperature Debris Bed”, Journal of Nuclear Science and Technology, 57:4, 353-369, 2019, DOI: 10.1080/00223131.2019.1691078 Contributed By: A. Konovalenko IP/Copyright Situation: None Link to PIRT:
DEFOR-A SAFEST	SAFEST-A22	Debris bed 3D scanning, agglomeration fraction as pool depth function, particle size distribution as pool depth function, debris bed porosity estimate	Melt jet breakup		EU SAFEST
▼ Show/Hide Additional Details References: G. Albrecht, B. Fluhrer, A. Miassoedov, S. Bechta, A. Karbojian, P. Kudinov. Debris beds formed from FCI in presence of a control rod guide tube in BWRs (DEFOR/SAFEST-A22 test). SAFEST-DRI-D3.2.4. 2017 Contributed By: A. Konovalenko IP/Copyright Situation: None Link to PIRT:
DEFOR-M	M1 - M25	Debris bed 3D scanning, agglomeration fraction, particle size distribution as pool depth function, debris bed porosity estimate	Melt jet breakup	CLSVOF	National program "Accident Phenomena of Risk Importance" (APRI) supported by consortium of SSM and NPPs in Sweden
▼ Show/Hide Additional Details References: [1] Y. Xiang, D.S. Liang, A. Komlev, D. Fang, Y. Deng, L. Zhao, W. Ma. An experimental investigation on debris bed formation from fuel coolant interactions of metallic and oxidic melts, Applied Thermal Engineering 233 (2023) 121186. [2] Y. Xiang, Y. Deng, D. Fang, D. Liang, W. Ma. Experimental investigation on debris bed formation from metallic melt coolant interactions. International Journal of Thermal Sciences 192 (2023) 108398. [3] Y. Xiang, Y. Deng, D. Fang, N. Zhao, W. Ma. Experimental investigation on ex-vessel debris bed formation using low melting-point melt of binary metals. Progress in Nuclear Energy 157 (2023) 104564. Contributed By: W. Ma IP/Copyright Situation: None Link to PIRT:

SPREADING- (SG) (1)

Facility Name	Test Identification	Measured Parameters	Modelling	Simulation Code	Experimental Research Program	Country
PULiMS	E7 - E18	Melt spreading area, debris dimensions, 3D scaning, prosity estimate, melt spreading velocity, temperatures	Melt spreading area	MELTSPREAD; MPS; MSPREAD	Experimental program "Invstigation of Cooling Phenomena of High Temperature Molten Core" for Nuclear regulation Authority (NRA) of Japan
▼ Show/Hide Additional Details References: Akitoshi Hotta, Miyuki Akiba, Akinobu Morita, Alexander Konovalenko, Walter Villanueva, Sevostian Bechta, Andrei Komlev, Sachin Thakre, Seyed Mohsen Hoseyni, Per Sköld, Toshinori Matsumoto, Tomoyuki Sugiyama & Michael Buck, “Experimental and Analytical Investigation of Formation and Cooling Phenomena in High Temperature Debris Bed”, Journal of Nuclear Science and Technology, 57:4, 353-369, 2019, DOI: 10.1080/00223131.2019.1691078 Contributed By: A. Konovalenko IP/Copyright Situation: None Link to PIRT:

Implemented as part of the Seaknot EU funded project (HORIZON-EURATOM-2021-NRT-01 under Grant Agreement No. 101060327) - WP2.6 UNIPI (2024-2026)