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RASPLAV, Refine accident management strategies during a reactor core meltdown

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Program name Package id Status Status date
RASPLAV CSNI2300/01 Arrived 02-MAR-2006

Machines used:

Package ID Orig. computer Test computer
CSNI2300/01 Many Computers
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The RASPLAV project aimed to refine accident management strategies during a reactor core meltdown; it was completed in June 2000. Little is known about the complex interactions that take place during a core meltdown, so one of the RASPLAV project's primary goals was to develop an understanding of this process. The information gathered during tests at the Kurchatov Institute have allowed scientists to develop models of a core meltdown. These models can be used in the design of new reactors and in refining the accident procedures for existing ones.


Two aspects of the issue were considered. First, for existing reactors, where external cooling may not be practicable, the process and time sequence before melt-through were studied. This was to help devlop management strategies for severe accidents. Secondly, for future and some existing reactor designs, the project aimed to determine the heat transfer conditions under which cavity flooding can be a viable accident management option.


The project was run in two successive phases. The RASPLAV Phase-2 project investigated the progression of a severe accident and in particular the thermal loading imposed by a corium pool on the lower head of a light water reactor (LWR) vessel. It followed an earlier Phase-1 project dedicated mainly to the build-up of the experimental and analytical infrastructure.


The project objectives were to obtain relevant data on the physical and thermal behavior of the corium in large-scale tests, to derive thermal-physical property data for various molten core materials, and to investigate the effects of stratification of molten materials. The programme of work involved the use of the large facilities available at the Kurtchatov Institute in Russia. Four large-scale tests were carried out and were complemented by a series of smaller-scale experiments, all involving the use of materials representative of power reactor cores. Experiments with these test materials in molten condition required temperatures of approximately 3000 deg.C - a very challenging task, especially for large-scale tests. The analytical work was done at the Russian Academy of Science's Institute of Nuclear Safety (IBRAE).


The project was successfully concluded in 2000.The results are set out in the Project final report which was presented and reviewed in November 2000 at the last RASPLAV seminar, sponsored by the OECD and hosted by the German Gesellschaft fur Anlagen- und Reaktorsicherheit (GRS), Munich. The project data remained proprietary until 2003.


Participating countries:
Belgium, Canada, Czech Republic, Finland, France, Germany, Hungary, Italy, Japan, Netherlands, Republic of Korea, Russian Federation, Spain, Sweden, Switzerland, United Kingdom, United States.


Programme status: Completed in June 2000


The distribution of this package is restricted and subject to prior approval.


For more detailed information visit

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Package ID Status date Status
CSNI2300/01 02-MAR-2006 Masterfiled restricted
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CSNI2300/01, included references:
- V.G. Asmolov, V.F. Strizhov, Yu.G. Degaltsev: Behaviour of the Corium Molten
Pool under External Cooling (July 2000) - Final Report
- V. Asmolov, Yu. Degaltsev, V. Vlasov, Yu. Utkin, T. Trushkina, A. Kiselev, E.
D'akov, V. Vishnevsky, V. Zagryazkin, E. Astahova: Post-Test Examinations:
Methodology and Results (July 2000) - Final Report Attachment A
- V.G. Asmolov, I.F. Isaev, I.M. Khazanovich, A.I. Surenkov: Facilities:
Components and Instrumentation (July 2000) - Final Report Attachment B
- V.G. Asmolov, S.S. Abalin, A.V. Merzliakov, V.N. Zagryazkin, Ye.V. Astakhova,
I.D. Daragan, V.D. Daragan, Ye.K. D'yakov, A.Yu. Kotov, A.S. Maskaev, Ye.M.
Rakitskaja, V.M. Repnikov, V.Yu. Vishnevsky, V.V. Volkov, A.G. Popkov, V.F.
Strizhov: Properties Studies: Methodology and Results (July 2000)-Final Report
Attachment C
- V.G. Asmolov, I.M. Khazanovich, A.G. Olhovskiy, N.P. Kiselev, S.S. Abalin,
I.P. Gnidoi, A.I. Surenkov, V.F. Strizhov, B.V. Barkovsky, N.V. Komissarova,
D.Ju. Chuvilin: RASPLAV Project Data Base (July 2000)-Final Report Attachment D
- The RASPLAV-A Facility Feasibility Study (1995)
- A.Aksenova, V.Chudanov, A.Churbanov, V.Pervichko, A.Popkov, V.Strizhov,
P.Vabishchevich, V.Varenkov: CONV2D: An Integrated Computer Code for Numerical
Modelling of Convection/Diffusion Processes with regard for Melting (May 1997)
- A.Aksenova, V.Chudanov, A.Churbanov, V.Pervichko, , A.Popkov, V.Strizhov,
P.Vabishchevich, V.Varenkov: CONV3D: An Integrated Computer Code for Numerical
Modelling of Convection/Diffusion Processes with regard for Melting (May 1997)
- V.Varenkov, A.Popkov, V.Pervichko: RASPLAV Command System, RCS (June 1997)
- V.Asmolov, V.Strizhov, R.Sehgal: Quick-Look RASPLAV-AW-200-2 Test Report
(June, 1997)
- Behaviour of Corium Melt Pool under External Cooling.
Final Report of the first phase of RASPLAV project (January, 1998)
- Yu. Degaltsev, V. Zagryazkin, Yu. Utkin, V. Vlasov: Diffusion of Carbon to
the Molten Corium through the Tantalum - Tungsten Wall Research Note (February,
- S.Abalin, A.Ignatochkin, I.Hazanovich, A.Udovenko: RASPLAV Experimental
Complex. Engineering System Description (Jan.1995) (RP-TR-1)
- S.A.Abalin, Yu.Degaltsev, O.Karlov: Metal Melts Formation and its
Interactions with Vessel Steel of WWER Type Reactor (January 1995) (RP-TR-2)
- L.Volokhonsky, L.Krasnyuk, V.Strizhov, O.Shakh, P.Vabishchevich, A.Churbanov:
RASPLAV-B Experimental Section. Feasibility Study Main Results (Topical Report)
(January 1995)(RP-TR-3)
- S.Abalin, A.Surenkov, S.Kersonovski: RASPLAV-A-Salt Facility Selection and
Justification of Design Parameters, Engineering Calculation and Design
Implementation, Program of Planned Experiments (January 1995)(RP-TR-4)
- V.Strizhov, V.Chudanov, P.Kondratenko, V.Likhanskii, O.Khoruzhii,
P.Vabishchevich, A.Churbanov, A.Filippov, V.Pervichko, A.Aksenova: Mathematical
Modeling and Analysis of RASPLAV Project Installations (January 1995)(RP-TR-5)
- I.Mosevitsky, A.Ipatov, S.Kiselev, P.Kerko, A.Charlarmov: Corium Physical
Property Experimental Investigation (up to 2500 deg.C) (Topical Report) (January
- S. Abalin, V. Asmolov, V. Daragan, E. D'jakov, A. Maskaev: Study of Corium
Electrical Resistance (July 1995) (RP-TR-7)
- V. Asmolov, S. Abalin, Yu. Degaltsev, E. D'jakov, I. Isaev, V. Pavlov, E.
Samarin, I. Hazanovich, O. Shakh: TULPAN Experimental Facility Description and
Investigation Program (July 1995)(RP-TR-8)
- V.G. Asmolov, Yu. Degaltsev, A. Kiselev, A. Kovalev, V. Skvorzov, V. Slabke,
Yu. Utkin, V. Vlasov: Study of RASPLAV-AW-2.5 Ingot Materials (September
- V. Asmolov, E. Diakov, A. Grechkin, I. Hazanovich, A. Isaef, E. Samarin:
Method and Devices for Measuring Parameters in Experiment on RASPLAV Facility
(September 1995)(RP-TR-10)
- S.Abalin, V.Asmolov, A.Udovenko: The Safety Issues of the RASPLAV Complex
(September 1995)(RP-TR-11)
- S.Abalin, V.Asmolov, Yu.Degaltsev, M.Gorodinskiy: RASPLAV-AD-2.5 Experiment
(Post-test Information Package) (Oct. 1995)(RP-TR-12)
- V.Asmolov, E.D'jakov, V.Daragan, A.Moskaliev, L.Mikhailichenko, S.Abalin,
Yu.Degaltsev, Yu.Utkin, V.Vlasov: Description of the Method for Determining
Corium Compositions (Dec. 1995)(RP-TR-13)
- Summary Data on RASPLAV-AW-2.5 Experiment (Synthesis Report)(January 1996)
- A.Aksenova, V.Chudanov, P.Kondratenko, V.Pervichko, V.Strizhov,
P.Vabishchevich: Numeric Models for RASPLAV Project (June, 1998) (RP-TR-15)
- Pre-test Analysis of RASPLAV-AW-200 Test (January 1996) (RP-TR-16)
- S. Abalin, A. Merzlyakov: Electrical Conductivity of Corium (Comparison of
RASPLAV Measurements and FARO Integral Data) (February 1996) (RP-TR-17)
- S.Abalin, V.Asmolov, V.Daragan, E.D'yakov, A.Merzlyakov, V.Vishnevsky:
Kinematic Viscosity Measurement of C-100 and C-22 Corium (April 1996)(RP-TR-18)
- Yu. Degaltsev, O. Karlov, V. Vasiliev, Yu.Veselkin, E. Potapov, B.N.
Mileshkin, V.A. Pavlov, Yu.I. Soplenkov, G.V. Semina: Investigation on
Short-Term Mechanical Properties of 15X2HMFA Vessel Steel in the Temperature
Range 20-1400 deg.C (April 1996) (RP-TR-19)
- A.Surenkov, S.Abalin, I.Gnedoy, V.Strizhov: RASPLAV-A-Salt Scoping Test
Thermal Hydraulic Results (April 1996) (RP-TR-20)
- S.Abalin, V.Asmolov, I.Isaev, L.Krasnyuk, A.Nekrasov, A.Ratnovskii,
L.Volochonskii, Yu.Degaltsev, Yu.Utkin, V.Vlasov, E.D'yakov, I.Khazanovich,
K.Pechalin, A.Olhovskii: Pretest Analysis of Final RASPLAV-AW-200 Design Volume
1: Main Research and Development Results (May 1996) (RP-TR-21v1)
- V.Strizhov, V.Chudanov, A.Aksenova, V.Likhanskii, B.Dobrov, A.Loboiko,
V.Pervitchko, A.Filippov, O.Khoruzii: Pretest Analysis of Final RASPLAV-AW-200
Design Volume 2: Numeric Simulation and Analysis (May 1996) (RP-TR-21v2)
- E.K. D'yakov, V.D. Daragan, I.D. Daragan, V.F. Strizhov, A.G. Popkov: Studies
on Thermal Conductivity of Corium of C-22 and C-100 Composition (May
- V. Strizhov, A.Filippov, S. Tcaun: Uncertainties Analysis of RASPLAV-AW-200
Facility (July 1996) (RP-TR-23)
- Latest Findings from the OECD RASPLAV Project (December 1996) (RP-TR-24)
- A.Filippov, V. Strizhov: Numeric Simulation of PLATE Experiment (January
1997) (RP-TR-25)
- V.Asmolov, S.Abalin, I.Isaev, B.Gershman, K.Pechalin, Yu.Degaltsev, V.Vlasov,
Yu. Utkin, E.D'jakov, A. Maskaev, V. Repnikov, V.Vishnevskiy, Yu. Veselkin,
A.Kisselev, A. Kovalev, V. Skvorzov, V. Chernishov, V. Churin, A.Filippov,
V.Chudanov, V.Strizhov: RASPLAV-AW-200-1 Post-Test Analysis (June
- V.Strizhov, A.Filippov: Pre-Test Analysis of RASPLAV-AW-200-2 Design
(February 1997) (RP-TR-27)
- A.Surenkov, S.Abalin, V.Gnidoi, V.Strizhov: Investigation of Results of Salt
Experiments on Simulation of Heat Transfer in the Corium Melt at the
RASPLAV-A-Salt Facility (May 1997) (RP-TR-28)
- Yu.Degaltsev, O.Karlov, V.Vasiliev, E.Ostapov: Investigation of
High-Temperature Strength of 15X2HMFA Vessel Steel in Temperature Range of 1000
- 1300oC (May-June 1997) (RP-TR-29)
- RASPLAV-AW-200-2  Pretest Information Package (May 1997) (RP-TR-30)
- V.Asmolov, Yu.Degaltsev, E.D'jakov, I.Golubev, A.Grechkin, I.Khazanovich,
A.Kisselev, A.Kovalev, M.Krutov, B.Lobkovsky, V.Pavlov, Ye.Samarin, I.Semionov,
V.Sokolov, Yu.Utkin, V.Vishnevskiy, V.Vlasov: TULPAN Facility Measurement
(August 1997) (RP-TR-31)
- V. Asmolov, S. Abalin, I. Isaev, B. Gershman, K. Pechalin, Yu. Degaltsev, V.
Vlasov, Yu. Utkin, E. D'jakov, A. Maskaev, V. Repnikov, V.Vishnevskiy, Yu.
Veselkin, A. Kisselev, A. Kovalev, V. Skvorzov, V. Chernishov, V. Churin,
A.Filippov, V. Chudanov, V. Strizhov, A. Aksenova: Intermediate Report of
RASPLAV-AW-200-2 Post-Test Analysis (October, 1997) (RP-TR-32)
- V. Asmolov, S. Abalin, A. Surenkov, I. Gnidoi V. Strizhov: Results of Salt
Experiments Performed during Phase I of RASPLAV Project (January,
- Ye. Astakhova, Yu. Degaltsev, E. D'jakov, A. Maskaev, V. Repnikov, Yu. Utkin,
V.Vishnevskiy, V. Zagryazkin: Preliminary Study of Interaction between
Iron-Containing Corium and Tungsten (January, 1998)(RP-TR-34)
- V. Asmolov, E. Astahova, E. D'jakov, V.Vishnevskiy, V.Zagryazkin: Feasibility
Study on Iron and FP Additions to the C-100 Corium (April, 1998) (RP-TR-35)
- V. Asmolov, S. Abalin, A. Merzliakov, A. Ignatochkin: Property Measurement of
75 NaBF4 + 25 NaF Salt Composition (May, 1998) (RP-TR-36)
- V. Asmolov, E. Astahova, V. Vishnevskiy, E. D'jakov, V. Zagryazkin, A. Kotov,
V. Repnikov: Density of Molten C-100 Corium (March, 1999) (RP-TR-37)
- V. Semenov, V. Strizhov, S. Krylov: Results of the Post-Test Analysis of the
Non-eutectic Salt Mixture and Proposal for the Next Test (May, 1999)(RP-TR-38)
- V. Asmolov, E. Astakhova, V. Vishnevsky,  V. Vlasov, Yu. Degaltsev, E.
Dyakov, V. Zagryazkin, A. Kovalev, T.Trushkina, Yu. Utkin: The STF-44 and
STF-46+ Post-Test Examinations (January, 2000) (RP-TR-39)
- V.G. Asmolov, Ye.V. Astakhova, V.Yu. Vishnevsky, Yu.G. Degaltsev, Ye.K.
Dyakov, V.N. Zagryazkin, Yu.M. Utkin, A.Yu. Kotov, V.M. Repnikov: Supporting
Corium Tests Volume 1: Studies of the Opportunity for the Stratification of the
U-Zr-O Carbon Free Corium in the Liquid State under the Conditions of the
RASPLAV Experiments (March, 2000)(RP-TR-40v1)
- V.G. Asmolov, Ye.V. Astakhova, V.Yu. Vishnevsky, Yu.G. Degaltsev, Ye.K.
Dyakov, V.N. Zagryazkin, Yu.M. Utkin, V.M. Repnikov, V.V. Vlasov, A.M. Kovalev,
T.V. Trushkina, V.O. Chernyshov: Supporting Corium Tests Volume 2:
Investigation of the Separation and Interaction of Suboxidised Carbon Free
Corium below Liquidus Temperature (March, 2000) (RP-TR-40v2)
- V.G. Asmolov, V.Yu. Vishnevsky, V.V. Vlasov, I.Ye. Golubev, V.V. Gubankov,
Yu.G. Degaltsev, Ye.K. Dyakov, V.N. Zagryazkin, A.N. Kisselev, M.A. Krutov,
B.S. Lobkovsky, V.A. Pavlov, Ye.N. Samarin, I.M. Semenov, V.Ye. Sokolov, Yu.M.
Utkin, A.S. Filippov, I.M. Khazanovich, V.O. Chernyshov: The TULPAN T-6
Post-Test Analysis (April, 2000) (RP-TR-41)
- V.G. Asmolov, S.S. Abalin, A.V. Merzlyakov: Measurement of Thermal
Conductivity of Molten Salt 46.5LiF + 11.5NaF + 42KF(mol %) (February,
- V. Asmolov, S. Abalin, I. Isaev, B. Gershman, K. Pechalin, V. Strizhov, V.
Chudanov, A. Aksenova, Yu. Veselkin, V. Vishnevsky, V. Vlasov, Yu. Degaltsev,
A. Kiselev, A. Kovalev, T. Trushkina, Yu. Utkin, V. Chernyshov, V. Churin:
RASPLAV-AW-200-4 Post-Test Analysis (April, 2000) (RP-TR-43)
- V. Strizhov, V. Semenov, S. Krylov: The Proposed Scenario for Conducting the
Eighth Test Series with Non-Eutectic Salt (February, 2000) (RP-TR-44)
- V. Asmolov, S. Abalin, A. Merzlyakov: Corium Surface Tension Measurement
(April, 2000) (RP-TR-45)
- V.G.Asmolov, S.S.Abalin, A.I.Surenkov, I.P.Gnidoy, B.V.Barkovsky,
N.V.Komissarova, D.Yu.Chuvilin, Yu.V.Rybakov, V.F.Strizhov, V.N.Semenov:
Studies of Heat and Mass Transfer in Molten Salts (January, 2001) (RP-TR-46)
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No specified programming language
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Russian Research Centre
Kurchatov Institute
Kurchatov sq., 1
Moscow 123182
Russian Federation

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RASPLAV reports
Computer codes CONV2D and CONV3D
RASPLAV Command Processor
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  • Y. Integral Experiments Data, Databases, Benchmarks

Keywords: accidents, core meltdown.