IMPROVED MODELS AND METHOD OF POWER CHANGE OF NPP UNIT WITH VVER-1000
This study represents the improved mathematical and imitational allocated in space multi-zone model of VVER-1000 which differs from the known one. It allows to take into account the energy release of 235U nuclei fission as well as 239Pu . Moreover, this model includes sub-models of simultaneous cont...
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| Format: | Article |
| Language: | English |
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Odessa National Academy of Food Technologies
2017-06-01
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| Series: | Автоматизация технологических и бизнес-процессов |
| Subjects: | |
| Online Access: | http://journals.gsjp.eu/index.php/atbp/article/view/505 |
| _version_ | 1818188862857412608 |
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| author | T. Foshch S. Pelykh |
| author_facet | T. Foshch S. Pelykh |
| author_sort | T. Foshch |
| collection | DOAJ |
| description | This study represents the improved mathematical and imitational allocated in space multi-zone model of VVER-1000 which differs from the known one. It allows to take into account the energy release of 235U nuclei fission as well as 239Pu . Moreover, this model includes sub-models of simultaneous control impact of the boric acid concentration in the coolant of the first circuit and the position of 9th group control rods which allows to consider it as the model with allocated parameters and also allows to monitor changes in the mentioned technological parameters by reactor core symmetry sectors, by layers of reactor core height and by fuel assembly group each symmetry sector. Moreover, this model allows to calculate important process-dependent parameters of the reactor (including axial offset) as quantitative measure of its safety. As the mathematical and imitational models were improved, it allows to take into account intrinsic properties of the reactor core (including transient processes of xenon) and thus reduce the error of modelling static and dynamic properties of the reactor.<br />The automated control method of power change of the NPP unit with VVER-1000 was proposed for the first time. It uses three control loops. One of which maintains the regulatory change of reactor power by regulating the concentration of boric acid in the coolant, the second circuit keeps the required value of axial offset by changing the position of control rods, and the third one holds constant the coolant temperature mode by regulating the position of the main turbo generator valves.<br />On the basis of the above obtained method, two control programs were improved. The first one is the improved control program that implements the constant temperature of the coolant in the first circuit and the second one is the improved control program that implements the constant steam pressure in the second circuit. |
| first_indexed | 2024-12-11T23:33:40Z |
| format | Article |
| id | doaj.art-ef1d115f5d684e0ab462b9211635d1e7 |
| institution | Directory Open Access Journal |
| issn | 2312-3125 2312-931X |
| language | English |
| last_indexed | 2024-12-11T23:33:40Z |
| publishDate | 2017-06-01 |
| publisher | Odessa National Academy of Food Technologies |
| record_format | Article |
| series | Автоматизация технологических и бизнес-процессов |
| spelling | doaj.art-ef1d115f5d684e0ab462b9211635d1e72022-12-22T00:45:56ZengOdessa National Academy of Food TechnologiesАвтоматизация технологических и бизнес-процессов2312-31252312-931X2017-06-019110.15673/atbp.v9i1.505469IMPROVED MODELS AND METHOD OF POWER CHANGE OF NPP UNIT WITH VVER-1000T. Foshch0S. Pelykh1Odessa National Polytechnic UniversityOdessa National Polytechnic UniversityThis study represents the improved mathematical and imitational allocated in space multi-zone model of VVER-1000 which differs from the known one. It allows to take into account the energy release of 235U nuclei fission as well as 239Pu . Moreover, this model includes sub-models of simultaneous control impact of the boric acid concentration in the coolant of the first circuit and the position of 9th group control rods which allows to consider it as the model with allocated parameters and also allows to monitor changes in the mentioned technological parameters by reactor core symmetry sectors, by layers of reactor core height and by fuel assembly group each symmetry sector. Moreover, this model allows to calculate important process-dependent parameters of the reactor (including axial offset) as quantitative measure of its safety. As the mathematical and imitational models were improved, it allows to take into account intrinsic properties of the reactor core (including transient processes of xenon) and thus reduce the error of modelling static and dynamic properties of the reactor.<br />The automated control method of power change of the NPP unit with VVER-1000 was proposed for the first time. It uses three control loops. One of which maintains the regulatory change of reactor power by regulating the concentration of boric acid in the coolant, the second circuit keeps the required value of axial offset by changing the position of control rods, and the third one holds constant the coolant temperature mode by regulating the position of the main turbo generator valves.<br />On the basis of the above obtained method, two control programs were improved. The first one is the improved control program that implements the constant temperature of the coolant in the first circuit and the second one is the improved control program that implements the constant steam pressure in the second circuit.http://journals.gsjp.eu/index.php/atbp/article/view/505method of automated controlcontrol models and methodsmathematical model235U239Puthree control loopsautomatic control systemVVER-1000 |
| spellingShingle | T. Foshch S. Pelykh IMPROVED MODELS AND METHOD OF POWER CHANGE OF NPP UNIT WITH VVER-1000 Автоматизация технологических и бизнес-процессов method of automated control control models and methods mathematical model 235U 239Pu three control loops automatic control system VVER-1000 |
| title | IMPROVED MODELS AND METHOD OF POWER CHANGE OF NPP UNIT WITH VVER-1000 |
| title_full | IMPROVED MODELS AND METHOD OF POWER CHANGE OF NPP UNIT WITH VVER-1000 |
| title_fullStr | IMPROVED MODELS AND METHOD OF POWER CHANGE OF NPP UNIT WITH VVER-1000 |
| title_full_unstemmed | IMPROVED MODELS AND METHOD OF POWER CHANGE OF NPP UNIT WITH VVER-1000 |
| title_short | IMPROVED MODELS AND METHOD OF POWER CHANGE OF NPP UNIT WITH VVER-1000 |
| title_sort | improved models and method of power change of npp unit with vver 1000 |
| topic | method of automated control control models and methods mathematical model 235U 239Pu three control loops automatic control system VVER-1000 |
| url | http://journals.gsjp.eu/index.php/atbp/article/view/505 |
| work_keys_str_mv | AT tfoshch improvedmodelsandmethodofpowerchangeofnppunitwithvver1000 AT spelykh improvedmodelsandmethodofpowerchangeofnppunitwithvver1000 |