This title appears in the Scientific Report :
2000
Please use the identifier:
http://hdl.handle.net/2128/28196 in citations.
Investigation of the effectiveness of innovative passive saftey systems for boiling water reactors
Investigation of the effectiveness of innovative passive saftey systems for boiling water reactors
The project "European BWR R&D Cluster for Innovative Passive Safety Systems" concentrated on important innovations of BWRs such as the natural convection in the reactor coolant system, the passive decay heat removal from the reactor coolant system and the containment and a passive init...
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Personal Name(s): | Hicken, Enno Frerich (Editor) |
---|---|
Verfondern, Karl (Editor) | |
Contributing Institute: |
Institut für Sicherheitsforschung und Reaktortechnik; ISR |
Imprint: |
Jülich
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
2000
|
ISBN: |
3-89336-263-0 |
Document Type: |
Book |
Research Program: |
Allgemeine und nicht nukleare Sicherheitsforschung |
Series Title: |
Schriften des Forschungszentrums Jülich. Reihe Energietechnik / Energy Technology
11 |
Link: |
OpenAccess |
Publikationsportal JuSER |
The project "European BWR R&D Cluster for Innovative Passive Safety Systems" concentrated on important innovations of BWRs such as the natural convection in the reactor coolant system, the passive decay heat removal from the reactor coolant system and the containment and a passive initiator which is independent from the Reactor Protection System and actuates safety systems. Eight partners from five countries, assisted in 1998 by six partners from additional two countries within a BWR Concerted Action, participated in the project. Two large test facilities (NOKO in Germany for separate effect tests and PANDA in Switzerland for integral tests) delivered high quality experimental data; post-test calculations were performed with the lumped parameter codes ATHLET. APROS, COCOSYS. MELCOR, RALOC. RELAP5. TRAC and the CFD-codes CFX-4, GOTHIC, PHOENICS. In addition, operational data from the Dodewaard NPP were used. The passive safety systems or passive components with main phenomena in brackets studied were: - two bundles of the emergency condenser from SIEMENS and the IC installed in Dodewaard NPP (condensation in horizontal tubes) - one isolation condenser (lC) from GE and the passive containment cooler from GE (heat tran sfer in vertical tubes with non-condensable gases) the building condenser from SIEMENS and one plate condenser from Siempelkamp (heat transfer with non-condensable gases present) - four passive initiators from SIEMENS (heat exchange) The tests performed on these systems have resulted into a new experimental data base for the use in code development, improvement and validation, design and licensing. The experimental program of this project has successfully demonstrated the performance of the different passive decay heat removal systems or components being studied under a variety of conditions. The computer codes used were capable to simulate the experimental results; in addition, it has been agreed that these codes are also capable to simulate the system and component behavior of commercial power plants. However, it became evident that modern CFD codes - capable to model flow-, temperature- and pressure-fields with very fine mesh sizes - have to be used to a greater extend than it was expected at the start of the projects. The results gained with this project are already being used by a vendor for his innovative design of a future BWR. A common understanding has been achieved about additional R&D. There is a need for additional experiments to be used for the validation of 3D codes, especially CFD codes. For BWRs, the thermal hydraulic I neutronic interactions at low power and pressure levels resulting in possible instabilities should be studied further as has been identified by the BWRCA participants. |