Precipitate formation contributing to sump screens clogging of a nuclear power plant during an accident
For many years, the French “Institut de Radioprotection et de Sûreté Nucléaire” has developed studies concerning chemical effects, which can occur during a loss of coolant accident (LOCA) on a nuclear power plant, due to precipitate formation leading to an increase of head loss to sump screens. This...
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| Published in | Chemical engineering research & design Vol. 86; no. 6; pp. 633 - 639 |
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| Main Authors | , , , , , , , |
| Format | Journal Article Conference Proceeding |
| Language | English |
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Elsevier B.V
01.06.2008
Institution of Chemical Engineers Elsevier |
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| Abstract | For many years, the French “Institut de Radioprotection et de Sûreté Nucléaire” has developed studies concerning chemical effects, which can occur during a loss of coolant accident (LOCA) on a nuclear power plant, due to precipitate formation leading to an increase of head loss to sump screens. This increase can cause the loss of emergency core cooling system (ECCS) and of the containment spray system (CSS), which are the two removal heat safety systems which ensure the accident mitigation.
These precipitates are formed by recombination of mineral species, which are released due to corrosion of immersed debris (particles of concrete, glass fibre insulation, piece of paint…). PHREEQC software has been used to identify nature and mass of precipitates that can be formed during a LOCA.
This report presents the results of sensitivity studies carried out with PHREEQC. Chemical precipitate formation is studied as a function of several physical parameters, such as temperature, pH, nature and debris concentration. The optimal conditions in order to reduce the formation of precipitates are drawn from these calculations. |
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| AbstractList | For many years, the French "Institut de Radioprotection et de Surete Nucleaire" has developed studies concerning chemical effects, which can occur during a loss of coolant accident (LOCA) on a nuclear power plant, due to precipitate formation leading to an increase of head loss to sump screens. This increase can cause the loss of emergency core cooling system (ECCS) and of the containment spray system (CSS), which are the two removal heat safety systems which ensure the accident mitigation. These precipitates are formed by recombination of mineral species, which are released due to corrosion of immersed debris (particles of concrete, glass fibre insulation, piece of paint...). PHREEQC software has been used to identify nature and mass of precipitates that can be formed during a LOCA. This report presents the results of sensitivity studies carried out with PHREEQC. Chemical precipitate formation is studied as a function of several physical parameters, such as temperature, pH, nature and debris concentration. The optimal conditions in order to reduce the formation of precipitates are drawn from these calculations. For many years, the French “Institut de Radioprotection et de Sûreté Nucléaire” has developed studies concerning chemical effects, which can occur during a loss of coolant accident (LOCA) on a nuclear power plant, due to precipitate formation leading to an increase of head loss to sump screens. This increase can cause the loss of emergency core cooling system (ECCS) and of the containment spray system (CSS), which are the two removal heat safety systems which ensure the accident mitigation. These precipitates are formed by recombination of mineral species, which are released due to corrosion of immersed debris (particles of concrete, glass fibre insulation, piece of paint…). PHREEQC software has been used to identify nature and mass of precipitates that can be formed during a LOCA. This report presents the results of sensitivity studies carried out with PHREEQC. Chemical precipitate formation is studied as a function of several physical parameters, such as temperature, pH, nature and debris concentration. The optimal conditions in order to reduce the formation of precipitates are drawn from these calculations. For many years, the French "Institut de Radioprotection et de Sûreté Nucléaire" has developed studies concerning chemical effects, which can occur during a loss of coolant accident (LOCA) on a nuclear power plant, due to precipitate formation leading to an increase of head loss to sump screens. This increase can cause the loss of emergency core cooling system (ECCS) and of the containment spray system (CSS), which are the two removal heat safety systems which ensure the accident mitigation. These precipitates are formed by recombination of mineral species, which are released due to corrosion of immersed debris (particles of concrete, glass fibre insulation, piece of paint...). PHREEQC software has been used to identify nature and mass of precipitates that can be formed during a LOCA. This report presents the results of sensitivity studies carried out with PHREEQC. Chemical precipitate formation is studied as a function of several physical parameters, such as temperature, pH, nature and debris concentration. The optimal conditions in order to reduce the formation of precipitates are drawn from these calculations. © 2008 The Institution of Chemical Engineers. |
| Author | Bela, Soltesz Sandrine, Rouaix Marek, Liska Dagmar, Galuskova Jean-Marie, Mattei Yves, Armand Cantrel, Laurent Yvan, Vicena |
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| Keywords | DBA nuclear accident Chemical effects Precipitates Strainer clogging Head loss Sensitivity analysis Cooling Coolant Hydrodynamics Radioprotection Safety systems Accident Corrosion Nuclear power plant Pressure drop pH Software Pollution abatement Emergency Glass fiber Precipitate formation Thermal effects Loss of coolant accidents Containment spray system Nuclear power plants Emergency core cooling system pH effects |
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| References | Jauberthie, Temini, Laquerbe (bib3) 1996 Pointner, W., Kersting, E., Pütter, B. Eurosafe 2005. Generic issues on sump clogging 99–4259. Gesellschaft für Anlagen-und Reaktorsicherheit Mattei, J.-M., Armand, Y., Vicena, I., Soltesz, B., Batalik, J., Gubco, V., Liska, M., Galuskova, D., Klementova, A. 2005, Risk of Sump Plugging Experimental program on chemical effects and head loss modelling Carmona, Garcia-Heras, Gil, Villegas (bib2) 2005 Mattéi, J.M., Armand, Y., Vicena, I., Soltesz, B., Batalik, J., Gubco, V., Liska, M., Klementova, A. Eurosafe 2005. Bruxelles, 7–8 November, Risk of sump plugging. Experimental program on chemical effects. Parkhurst, D.L., Appelo, C.A.J., 1999. User's guide to PHREEQC (version 2)—a computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations Luke (bib4) 2004; 34 Andreychek (bib1) September 2004 . 10.1016/j.cherd.2008.03.016_bib8 10.1016/j.cherd.2008.03.016_bib7 10.1016/j.cherd.2008.03.016_bib6 10.1016/j.cherd.2008.03.016_bib5 Jauberthie (10.1016/j.cherd.2008.03.016_bib3) 1996 Luke (10.1016/j.cherd.2008.03.016_bib4) 2004; 34 Andreychek (10.1016/j.cherd.2008.03.016_bib1) 2004 Carmona (10.1016/j.cherd.2008.03.016_bib2) 2005 |
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| SubjectTerms | Applied sciences Chemical effects Chemical engineering DBA nuclear accident Exact sciences and technology Head loss Hydrodynamics of contact apparatus Physics Precipitates Strainer clogging |
| Title | Precipitate formation contributing to sump screens clogging of a nuclear power plant during an accident |
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