Study of the iodine kinetics in thermal conditions of a RCS in nuclear severe accident
•High temperature iodine reactivity in gas phase.•Kinetics limitations were evidenced in severe accident gas atmosphere conditions.•Iodine kinetic scheme involving steam/di-hydrogen/di-oxygen. During the PHEBUS-FP integral severe accidents simulation tests, gaseous iodine was detected in earlier sta...
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| Veröffentlicht in: | Annals of nuclear energy 2017-03, Vol.101, p.69-82 |
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| container_title | Annals of nuclear energy |
| container_volume | 101 |
| creator | Grégoire, A.-C. Délicat, Y. Tornabene, C. Cousin, F. Gasnot, L. Lamoureux, N. Cantrel, L. |
| description | •High temperature iodine reactivity in gas phase.•Kinetics limitations were evidenced in severe accident gas atmosphere conditions.•Iodine kinetic scheme involving steam/di-hydrogen/di-oxygen.
During the PHEBUS-FP integral severe accidents simulation tests, gaseous iodine was detected in earlier stages of the simulated accident, coming from the experimental circuit modelling a reactor coolant system. One possible explanation is the existence of some kinetic limitations which promote the persistence of gaseous iodine at low temperature. This paper sums up some analytical and modelling works performed to check this assumption. Results show that the chemical speciation of iodine cannot be calculated by assuming chemical equilibrium, kinetics have to be considered, in particular for oxidising atmosphere with an excess of steam. A kinetic model for gaseous iodine is proposed and qualified by comparison with experimental works.
Such modelling should be considered to calculate the transport of iodine through the reactor coolant system for a severe accident because it can significantly impact iodine source term evaluations. |
| doi_str_mv | 10.1016/j.anucene.2016.10.013 |
| format | Article |
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During the PHEBUS-FP integral severe accidents simulation tests, gaseous iodine was detected in earlier stages of the simulated accident, coming from the experimental circuit modelling a reactor coolant system. One possible explanation is the existence of some kinetic limitations which promote the persistence of gaseous iodine at low temperature. This paper sums up some analytical and modelling works performed to check this assumption. Results show that the chemical speciation of iodine cannot be calculated by assuming chemical equilibrium, kinetics have to be considered, in particular for oxidising atmosphere with an excess of steam. A kinetic model for gaseous iodine is proposed and qualified by comparison with experimental works.
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During the PHEBUS-FP integral severe accidents simulation tests, gaseous iodine was detected in earlier stages of the simulated accident, coming from the experimental circuit modelling a reactor coolant system. One possible explanation is the existence of some kinetic limitations which promote the persistence of gaseous iodine at low temperature. This paper sums up some analytical and modelling works performed to check this assumption. Results show that the chemical speciation of iodine cannot be calculated by assuming chemical equilibrium, kinetics have to be considered, in particular for oxidising atmosphere with an excess of steam. A kinetic model for gaseous iodine is proposed and qualified by comparison with experimental works.
Such modelling should be considered to calculate the transport of iodine through the reactor coolant system for a severe accident because it can significantly impact iodine source term evaluations.</description><subject>Accidents</subject><subject>Atmospheric models</subject><subject>Chemical Physics</subject><subject>Chemical Sciences</subject><subject>Computer simulation</subject><subject>Coolants</subject><subject>Iodine</subject><subject>IODINE reactivity</subject><subject>Kinetics</subject><subject>Mathematical models</subject><subject>Nuclear reactors</subject><subject>or physical chemistry</subject><subject>Physics</subject><subject>RCS</subject><subject>Reaction kinetics</subject><subject>Severe accident</subject><subject>Source term</subject><subject>Theoretical and</subject><issn>0306-4549</issn><issn>1873-2100</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqNkU1rGzEQhkVJoM7HTyjo2BzW1cdK1p5KMPkoGApNm6vQzo6I3LWUSGtD_n20OPSaXjTonWdGo3kJ-cLZkjOuv22XLu4BIy5FvVZtybj8RBbcrGQjOGMnZMEk002r2u4zOStlyxgXpm0X5PFh2g-vNHk6PSENaQgR6d96TAEKDXGW886NFFIcwhRSLDPs6K_1w5yuD4_oMi14wIzUAYQB43RBTr0bC16-x3Py5_bm9_q-2fy8-7G-3jTQajE1gzJOd-BM79A76AdgnklQpvew6rAD1SkhhXKoufe901z3nAGC17KT9Zfn5OrY98mN9jmHncuvNrlg7683dtaYkFLrlTjM7Ncj-5zTyx7LZHehAI6ji5j2xXJj6lqUEeY_UNW1ulspXVF1RCGnUjL6f2NwZmd77Na-22Nne2a5Dl7rvh_rsK7nEDDbAgEj4BAywmSHFD7o8AZ05prV</recordid><startdate>20170301</startdate><enddate>20170301</enddate><creator>Grégoire, A.-C.</creator><creator>Délicat, Y.</creator><creator>Tornabene, C.</creator><creator>Cousin, F.</creator><creator>Gasnot, L.</creator><creator>Lamoureux, N.</creator><creator>Cantrel, L.</creator><general>Elsevier Ltd</general><general>Elsevier Masson</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>7SP</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><scope>L7M</scope><scope>1XC</scope><orcidid>https://orcid.org/0009-0000-5195-6764</orcidid><orcidid>https://orcid.org/0000-0002-9854-967X</orcidid><orcidid>https://orcid.org/0000-0003-3105-9032</orcidid></search><sort><creationdate>20170301</creationdate><title>Study of the iodine kinetics in thermal conditions of a RCS in nuclear severe accident</title><author>Grégoire, A.-C. ; Délicat, Y. ; Tornabene, C. ; Cousin, F. ; Gasnot, L. ; Lamoureux, N. ; Cantrel, L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c462t-d58a69ca8baefacbdc0f03c58bfc79e9c5952325ae61ffba616b10cecf6393013</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Accidents</topic><topic>Atmospheric models</topic><topic>Chemical Physics</topic><topic>Chemical Sciences</topic><topic>Computer simulation</topic><topic>Coolants</topic><topic>Iodine</topic><topic>IODINE reactivity</topic><topic>Kinetics</topic><topic>Mathematical models</topic><topic>Nuclear reactors</topic><topic>or physical chemistry</topic><topic>Physics</topic><topic>RCS</topic><topic>Reaction kinetics</topic><topic>Severe accident</topic><topic>Source term</topic><topic>Theoretical and</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Grégoire, A.-C.</creatorcontrib><creatorcontrib>Délicat, Y.</creatorcontrib><creatorcontrib>Tornabene, C.</creatorcontrib><creatorcontrib>Cousin, F.</creatorcontrib><creatorcontrib>Gasnot, L.</creatorcontrib><creatorcontrib>Lamoureux, N.</creatorcontrib><creatorcontrib>Cantrel, L.</creatorcontrib><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Hyper Article en Ligne (HAL)</collection><jtitle>Annals of nuclear energy</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Grégoire, A.-C.</au><au>Délicat, Y.</au><au>Tornabene, C.</au><au>Cousin, F.</au><au>Gasnot, L.</au><au>Lamoureux, N.</au><au>Cantrel, L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Study of the iodine kinetics in thermal conditions of a RCS in nuclear severe accident</atitle><jtitle>Annals of nuclear energy</jtitle><date>2017-03-01</date><risdate>2017</risdate><volume>101</volume><spage>69</spage><epage>82</epage><pages>69-82</pages><issn>0306-4549</issn><eissn>1873-2100</eissn><abstract>•High temperature iodine reactivity in gas phase.•Kinetics limitations were evidenced in severe accident gas atmosphere conditions.•Iodine kinetic scheme involving steam/di-hydrogen/di-oxygen.
During the PHEBUS-FP integral severe accidents simulation tests, gaseous iodine was detected in earlier stages of the simulated accident, coming from the experimental circuit modelling a reactor coolant system. One possible explanation is the existence of some kinetic limitations which promote the persistence of gaseous iodine at low temperature. This paper sums up some analytical and modelling works performed to check this assumption. Results show that the chemical speciation of iodine cannot be calculated by assuming chemical equilibrium, kinetics have to be considered, in particular for oxidising atmosphere with an excess of steam. A kinetic model for gaseous iodine is proposed and qualified by comparison with experimental works.
Such modelling should be considered to calculate the transport of iodine through the reactor coolant system for a severe accident because it can significantly impact iodine source term evaluations.</abstract><pub>Elsevier Ltd</pub><doi>10.1016/j.anucene.2016.10.013</doi><tpages>14</tpages><orcidid>https://orcid.org/0009-0000-5195-6764</orcidid><orcidid>https://orcid.org/0000-0002-9854-967X</orcidid><orcidid>https://orcid.org/0000-0003-3105-9032</orcidid></addata></record> |
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| ispartof | Annals of nuclear energy, 2017-03, Vol.101, p.69-82 |
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| language | eng |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Accidents Atmospheric models Chemical Physics Chemical Sciences Computer simulation Coolants Iodine IODINE reactivity Kinetics Mathematical models Nuclear reactors or physical chemistry Physics RCS Reaction kinetics Severe accident Source term Theoretical and |
| title | Study of the iodine kinetics in thermal conditions of a RCS in nuclear severe accident |
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