Effect of Boric Acid Solubility in Steam on the Process of Mass Transfer during Emergency Cooling of VVER-1200 Nuclear Reactor
The mechanisms of boric acid mass transfer in a VVER-1200 reactor core are studied in this work in the event of a major circulatory pipeline rupture and loss of all AC power. The VVER-1200's passive core cooling technology is made up of two levels of hydro accumulators. They use boric acid soluti...
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| Language: | English |
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R&D Wing, MIST
2022
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| Online Access: | http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/685 |
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| author | Kabir Hridoy, Md. Rezouanul A.V., Morozov Kabir, Md Saif |
| author_browse | A.V., Morozov Kabir Hridoy, Md. Rezouanul Kabir, Md Saif |
| author_facet | Kabir Hridoy, Md. Rezouanul A.V., Morozov Kabir, Md Saif |
| author_sort | Kabir Hridoy, Md. Rezouanul |
| collection | DSpace |
| description | The mechanisms of boric acid mass transfer in a VVER-1200 reactor core are
studied in this work in the event of a major circulatory pipeline rupture and loss
of all AC power. The VVER-1200's passive core cooling technology is made up of
two levels of hydro accumulators. They use boric acid solution with a
concentration of 16 g H3BO3/kg H2O to control the reactivity. Because of the
long duration of the accident process, the coolant with high boron content starts
boiling and steam with low concentration of boric acid departs the core. So,
conditions could arise in the reactor for possible accumulation and subsequent
crystallization of boric acid, causing the core heat removal process to
deteriorate. Calculations were carried out to estimate the likelihood of H3BO3
build-up and subsequent crystallization in the core of the VVER reactor.
According to the calculations, during emergency the boric acid concentration in
the reactor core is 0.153 kg/ kg and 0.158 kg/kg in both the events of solubility
of steam and without solubility of steam respectively and it does not exceed the
solubility limit which is about 0.415 kg/kg at water saturation temperature. No
precipitation of boric acid occurs within this time during the whole emergency
process. Therefore, findings of the study can be used to verify whether the
process of decay heat removal is affected or not. |
| format | Article |
| id | oai:localhost:123456789-685 |
| institution | My University |
| language | English |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | R&D Wing, MIST |
| publisherStr | R&D Wing, MIST |
| record_format | dspace |
| spelling | oai:localhost:123456789-6852022-01-19T04:27:29Z Effect of Boric Acid Solubility in Steam on the Process of Mass Transfer during Emergency Cooling of VVER-1200 Nuclear Reactor Kabir Hridoy, Md. Rezouanul A.V., Morozov Kabir, Md Saif VVER-1200, Crystallization, Hydroaccumulator-1, 2, Boric Acid, Reactor Core The mechanisms of boric acid mass transfer in a VVER-1200 reactor core are studied in this work in the event of a major circulatory pipeline rupture and loss of all AC power. The VVER-1200's passive core cooling technology is made up of two levels of hydro accumulators. They use boric acid solution with a concentration of 16 g H3BO3/kg H2O to control the reactivity. Because of the long duration of the accident process, the coolant with high boron content starts boiling and steam with low concentration of boric acid departs the core. So, conditions could arise in the reactor for possible accumulation and subsequent crystallization of boric acid, causing the core heat removal process to deteriorate. Calculations were carried out to estimate the likelihood of H3BO3 build-up and subsequent crystallization in the core of the VVER reactor. According to the calculations, during emergency the boric acid concentration in the reactor core is 0.153 kg/ kg and 0.158 kg/kg in both the events of solubility of steam and without solubility of steam respectively and it does not exceed the solubility limit which is about 0.415 kg/kg at water saturation temperature. No precipitation of boric acid occurs within this time during the whole emergency process. Therefore, findings of the study can be used to verify whether the process of decay heat removal is affected or not. 2022-01-19T04:27:21Z 2022-01-19T04:27:21Z 2021-12 Article 2224-2007 http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/685 en application/pdf R&D Wing, MIST |
| spellingShingle | VVER-1200, Crystallization, Hydroaccumulator-1, 2, Boric Acid, Reactor Core Kabir Hridoy, Md. Rezouanul A.V., Morozov Kabir, Md Saif Effect of Boric Acid Solubility in Steam on the Process of Mass Transfer during Emergency Cooling of VVER-1200 Nuclear Reactor |
| title | Effect of Boric Acid Solubility in Steam on the Process of Mass Transfer during Emergency Cooling of VVER-1200 Nuclear Reactor |
| title_full | Effect of Boric Acid Solubility in Steam on the Process of Mass Transfer during Emergency Cooling of VVER-1200 Nuclear Reactor |
| title_fullStr | Effect of Boric Acid Solubility in Steam on the Process of Mass Transfer during Emergency Cooling of VVER-1200 Nuclear Reactor |
| title_full_unstemmed | Effect of Boric Acid Solubility in Steam on the Process of Mass Transfer during Emergency Cooling of VVER-1200 Nuclear Reactor |
| title_short | Effect of Boric Acid Solubility in Steam on the Process of Mass Transfer during Emergency Cooling of VVER-1200 Nuclear Reactor |
| title_sort | effect of boric acid solubility in steam on the process of mass transfer during emergency cooling of vver 1200 nuclear reactor |
| topic | VVER-1200, Crystallization, Hydroaccumulator-1, 2, Boric Acid, Reactor Core |
| url | http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/685 |
| work_keys_str_mv | AT kabirhridoymdrezouanul effectofboricacidsolubilityinsteamontheprocessofmasstransferduringemergencycoolingofvver1200nuclearreactor AT avmorozov effectofboricacidsolubilityinsteamontheprocessofmasstransferduringemergencycoolingofvver1200nuclearreactor AT kabirmdsaif effectofboricacidsolubilityinsteamontheprocessofmasstransferduringemergencycoolingofvver1200nuclearreactor |