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Chernobyl Accident Analysis


Analysis of Accident Evolution and Consequences for the 4th Block Chernobyl Nuclear Power Plant.

Tech Area / Field

  • FIR-REA/Reactor Concept/Fission Reactors

3 Approved without Funding

Registration date

Leading Institute
VNIIEF, Russia, N. Novgorod reg., Sarov

Supporting institutes

  • Kurchatov Research Center, Russia, Moscow\nFederal State Unitary Enterprise Research and Development Institute of Power Engineering named after N.A.Dollezhal, Russia, Moscow


  • FOA National Defence Research Establishment, Sweden, Stockholm\nLawrence Livermore National Laboratory, USA, CA, Livermore

Project summary

The project would generalize and order the existing actual data on the consequences of catastrophe on the 4-th block of Chernobyl nuclear power plant occurred on April 26, 1986, the versions and hypothesis for the evolution processes resulted in strong hydraudynamic effects which threw down a portion of nuclear fuel beyond the block and to develop a relatively comprehensive model of the accident, evaluate the nuclear energy release level and spatial distribution of nuclear fuel based on the above mentioned data and used up-to-date capabilities for the description of complicated inter-related reactor processes since the runaway time.

The main results should include the understanding of the role and scale of nuclear energy release from the accident, the evaluation of the core mass thrown beyond the reactor system and defimtion of possible sites of active products distribution.

Technical approach

The task for the complete description of the accident pattern includes two inter-related steps:

The first step: the acquisition, systematic ordering and analysis of the existing data (drawings, photographic and motion data, version (hypothesis) publications, and computer preparation of data for creation of the database.

The second step would involve computational and experimental modeling of physical processes occurred in the accident.

These processes greatly differ from typical transient reactor processes and cannot be completely studied using the known methods.

However RFNC-VNI1EF and RNTsKI have a certain methodical and experimental base that can be used to solve these problems.

It includes the specialists in modeling of various processes both in thermohydraulics and mechanics and in neutron kinetics of nuclear processes, a great computing center, complex experimental systems.

To achieve this goal it is necessary to adapt the existing codes and methods and to develop the new ones for the description of thermohydraulics and mechanics processes in terms of elastic-plastic properties of materials, material dispersion and vapor generation, equations of stale, neutron-nuclear processes in the new parametric range typical for the reactor stale resulting from the runaway and destruction.

These efforts including the development of 2-D and 3-D codes will use the existing computing center. In addition, it is necessary to purchase new hardware with improved peripherals to develop the codes and to perform the studies.


The project would include:
- Acquisition and preliminary analysis of data on the consequences of Chernobyl accident,
- Further improvement of existing codes,
- Selection of tests and test computations required forth verification,
- Numerical analysis of various scenarios for theChernobyl accident,
- Issue of report.

Potential role of foreign collaborators

Joint efforts to improve US and RF theoretical models and numerical methods for the description of accidental processes.

Joint efforts to verify computational methods using experimental data relating to the accident.

Potential collaboration on the research subject (possible reviewers of the project)



Ishikawa M., Wakabayshi К., Tsuchihashi K., Sobajima M., Fujishiro T., Schiozawa S., Hayamizu Y., Kitahara К., Akino P., Fukumura N.

Research Centers

- Japan Atomic Energy Research Institute (Tokai-mura, Ibaraki-ken, Japan);
- Power Reactor and Nuclear Fuel Development Corporation (Nazita, O-arut-morchi, Ibaraki-ken, Japan).

Publications on Chernobyl accident scenario

- Nucl. Safety, 1987, vol.28, N 4, p.448-454;
- Nucl. Sci. Technology, 1987, vol.24, N12, p.1055-1065;
- Nucl. Eng. Design, 1988, vol.106, N 2, p.163-178, p.179-190;
- NEACRP-798, Sept. 1986.

USA and Canada


West J.M., Fletcher C.D., Chambers R., Bolander M.A., Dallman R.J., Jason Chao, Chexal V.K., William H.Layman, Gary Vine, Peter J. Jensen, Adi R. Dastur.

Research Centers

- Idaho National Engineering Laboratory (Idaho Falls, Idaho 83415, USA) EG&G Idaho Inc;
- Lawerence Livermore National Laboratory;
- Nuclear Safety Analysis Center (NSAC);
- US Department of Energy;
- Electric Power Research Institute (EPRI)-3412 Hillview Avenue, plato Alto, California 94303, USA;
- El International Inc.-P.O. Box 736, Idaho, 83402 USA;
- Atomic Energy of Canada Ltd(AECL)-2251 Speakman Avenue, Mississaugaт Ontario, LSK1B2, Canada.

Publications on Chemohyl accident scenario

- Nucl. Eng. Design, 1988, vol.105, N2, p.157-172
- Nucl. Eng. Intern., 1988, vol.33, N402, p.16,18,19
- Nucl. Technology, 1988, vol.83, N3, p.289-301
- Nucl. Sci. Enginecrig, 1989, vol.103, N3, p.283-288
- DOE/NE-0076, Nov. 1986.




Gerald Kirehner, Cornelius C.Noack, Von. E. Teuceert, K.A.Haas, W.Scherer, J.Singh

Research centers

- University of Bremen;
- Insitul fur Reactorentwicklung. Kernforschungsanlage Julich GmbH (Postfach 1913, 5170 Julich 1, Germany);

Publications on Chernobyl accident scenario

- Nucl. Safety, 1988, vol.29, N1, p.1-5;
- Atomwirtschaft. Atomteehnik, 1987, vol.32, N1, p.86-89.



Jose M. Martinez-Val, Jose M. Aragones, Emilio Minguez, Jose M.Perlado, Guillermo Velarde.

Research Centers

- Madrid Polytechnic University, Institute of Nuclear Fussion-Guticrrez Abascal 2, 28006 Madrid, Spain.

Publications on Chernobyl accident scenario

- Nucl. Technology, 1990, vol.90, June, p.371-388.


Timo A. Vanffolo, Markku K. Rajamaki

Research Centers

- Technical research Center of Finland, Nuclear Engineering Laboratory-169, SF-00181, Helsinki, Finland.

Publications on Chernobyl accident scenario

- Nucl. Technology, 1989.


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