Izvestiya vuzov. Yadernaya Energetika

The peer-reviewed scientific and technology journal. ISSN: 0204-3327

An Analysis of the «Fast» Noise Measurements of the Dynamic VVER processes

12/16/2023 2023 - #04 Nuclear power plants

Arkadov G.V. Pavelko V.I. Slepov M.T.

DOI: https://doi.org/10.26583/npe.2023.4.02

UDC: 621.039.4

Studies of maneuverable modes of VVER to confirm the possibility of participation of nuclear power plants in the mode of daily carrying capacity have been conducted for quite a long time. Tests at various nuclear power plants with VVER-1000 (Zaporizhia NPP in 1998, Khmelnitsky NPP in 2005, Tien Wan NPP in 2007) have shown the practical possibility of NPP participation in the daily schedule of carrying capacity, however, the commissioning of nuclear power plants with VVER-1200 requires similar work on all new units with VVER-1200: NVAES-2, LNPP-2 Belarusian NPP. The article presents some aspects of the use of noise control methods for analyzing the condition of equipment and the core.

Since the emergence of the technology of noise analysis of signals from VVER reactor installations, researchers have formulated several criteria for obtaining results of appropriate quality. The fundamental requirement for conducting noise experiments was the registration of data in stationary modes of operation of power units, since any non-stationarity made significant changes in spectral estimates, which ultimately complicated the work and «distorted» the results obtained. This requirement was included in the operating instructions of various diagnostic systems using noise signal analysis methods (the SЬS system, manufactured by Siemens). For a long period of time, the current situation suited both developers of various diagnostic systems and NPP personnel operating them at power units. On the one hand, this was due to the imperfection of the technical means used (low speed of analog-to-digital converters, limited storage capacity, bulky equipment, etc.), on the other hand, the use of domestic NPP power units only in the base load mode without tracking daily power fluctuations in the power system.

The standard archives of the upper block level system, the in-reactor control systemand additionally produced multi-channel «fast» measurements with a frequency of 1 kHz for the analysis of maneuverable mode 95–55–95% of the VVER-1200 reactor plant were analyzed. Global disturbances of the core have been detected after one step of the regulatory body of the control and protection system, which attenuates within one second if the next step of the control and protection system has not occurred during this time. Such fast neutron processes can be controlled only by neutron-noise measurements with an upper frequency of at least 20 Hz.

References

  1. Ignatenko E.I., Pytkin Yu.N. Maneuverability of VVER type reactors. Library of the operator of the NPP; issue 6. M.: Energoatomizdat, 1985, 88 p. (in Russian).
  2. Aver’yanova S.P., Lunin G.L., Proselkov V.N., Filimonov P.E., Gorokhov A.K., Bogatyr’S.M., Medvedev A.V., Povarov V.P. Using the Offset – Power Diagram to Monitor the Local Linear Power Density of Fuel Elements in a VVER-1000 Core. Atomic Energy. 2002, v.93, pp. 547-553. Available at: https://link.springer.com/article/10.1023/A:1020832414569 (accessed Aug. 04, 2023). DOI: https://doi.org/10.1023/A:1020832414569
  3. Tereshonok V.A., Stepanov V.S., Povarov V.P., Lebedev O.V., Makeev V.V. Prevention and suppression of axial xenon oscillations in the VVER-1000 core. Thermal engineering. 2003, no. 5, pp. 11-15. Аvailable at: https://elibrary.ru/download/elibrary_18806680_94837472.pdf (accessed Aug. 04, 2023) (in Russian).
  4. Averyanova S.P., Semchenkov Yu.M., Filimonov P.E., Gorokhov A.K., Molchanov V.L., Korennoy A.A., Makeev V.P. Adoption of Improved Algorithms for Controlling the Energy Release of a VVER-1000 Core at the Khmel’nitskii Nuclear Power Plant. Atomic Energy. 2005, vol. 98, no. 6, pp. 386-393. Available at: https://link.springer.com/article/10.1007/s10512-005-0222-6 (accessed Aug. 04, 2023). DOI: https://doi.org/10.1007/s10512-005-0222-6
  5. Aver’yanova S.P., Kosourov K.B., Semchenkov Yu.M., Filimonov P.E., Liu Haitao, Li Iou. Testing of improved algorithms controlling energy release in VVER-1000 in maneuvering regimes at the Tianwan nuclear power plant (China). Atomic Energy. 2007, vol. 103, pp. 836-844. Available at: https://link.springer.com/article/10.1007/s10512-007-0133-9 (accessed Aug. 04, 2023). DOI: https://doi.org/10.1007/s10512-007-0133-9
  6. Aver’yanova S.P., Kovel A.I., Mamichev V.V., Filimonov P.E. Development, introduction, and current state of the computational program «reactor simulator». Atomic energy. 2008, vol. 105, pp. 303-307. Available at: https://link.springer.com/article/10.1007/s10512-009-9100-y (accessed Aug. 04, 2023). DOI: https://doi.org/10.1007/s10512-009-9100-y
  7. Aver’yanova S.P., Filimonov P.E. Xenon stability of VVER-1200. Atomic Energy. 2009. vol. 107, pp. 424-428. Available at: https://link.springer.com/article/10.1007/s10512-010-9246-7 (accessed Aug. 04, 2023). DOI: https://doi.org/10.1007/s10512-010-9246-7
  8. Averyanova S.P., Dubov A.A., Kosourov K.B., Filimonov P.E. Temperature regulation and maneuverability of VVER-1000. Atomic energy. 2010, vol. 109, pp. 246-251. Available at: https://link.springer.com/article/10.1007/s10512-011-9352-1 (accessed Aug. 04, 2023). DOI: https://doi.org/10.1007/s10512-011-9352-1
  9. Averianova S.P., Dubov A.A., Kosourov K.B., Semchenkov Yu.M., Filimonov P.E. VVER-1200/1300 operation in a daily load schedule. Atomic energy. 2012, vol. 113, pp.,305-313. Available at: https:// link.springer.com/article/10.1007/s10512-013-9637-7 (accessed Aug. 04, 2023). DOI: https://doi.org/10.1007/s10512-013-9637-7
  10. Averyanova S.P., Dubov A.A., Kosourov K.B., Semchenkov Yu.M., P.E. Filimonov Development of Methods for VVER-1200/1300 Control in a Daily Load Schedule. Atomic energy. 2013, vol. 114, pp. 308-314. Available at: https://link.springer.com/article/10.1007/s10512-013-9716-9 (accessed Aug. 04, 2023). DOI: https://doi.org/10.1007/s10512-013-9716-9
  11. Glushenkov R.S. The study of key aspects of the introduction of the regime of daily power regulation at the NPP of Ukraine. Technological audit and production reserves. 2015, vol. 2, no. 1(22), pp. 18-26. DOI: 10.15587/2312-8372.2015.41404 (in Russian).
  12. Aver’yanova S.P., Vokhmyanina N.S., Zlobin D.A., Filimonov P.E., Kuznetsov V.I., Lagovskii V.B. Offset-Cardinality Phase Diagram Method of Controlling Reactor Power. Atomic Energy. 2017, vol. 121, pp. 155-160. Available at: https://link.springer.com/article/10.1007/s10512-017-0176-5 (accessed Aug. 04, 2023). DOI: https://doi.org/10.1007/s10512-017-0176-5
  13. Vygovsky S.B., Al Malkawi R.T., Khachatryan A.G., Abrahamyan S.A. Optimization of control algorithms for nuclear power plants with VVER-1200 to minimize water exchange in the 1st circuit during the implementation of daily maneuvering modes. Global nuclear safety. 2018, no 28, pp. 49-63 Available at: https://viti-mephi.ru/sites/default/files/pages/docs/gyb.2018.3.pdf (accessed 04.08.2023) (in Russian).
  14. Aver’yanova S. P., Vokhmyanina N. S., Zlobin D. A., Filimonov P. E., Povarov V. P. Investigation of Transient Xenon Processes in VVER-1200 at the Novovoronezh NPP. Atomic Energy. 2018, vol. 124, pp. 215-220. Available at: https://link.springer.com/article/10.1007/s10512-018-0400-y (accessed 04.08.2023). DOI: https://doi.org/10.1007/s10512-018-0400-y
  15. Filimonov P.E., Semchenkov Yu.M., Malyshev V.V., Dolgopolov N.Yu., Povarov V.P., Gusev I.N. VVER-1200 Tests in No. 6 Unit of the Novovoronezh NPP During Operation in a Daily Load Schedule. Atomic Energy. 2020, vol. 129, pp. 113-121. Available at: https://link.springer.com/article/10.1007/s10512-021-00721-y (accessed 04.08.2023). DOI: https://doi.org/10.1007/s10512-021-00721-y
  16. Povarov V.P., Ukraintsev V.F., Golubev E.I., Zhuk M.M. Experimental studies of neutron9physical processes in the VVER91200 core. Novovoronezh, 2021, 264 p. ISBN 978-5-6046275-0-1 (in Russian).
  17. Filimonov P.E., Dubov A.A., Semchenkov Yu.M., Bondar A.M., Vorobyev D.F. Testing of Nonstationary VVER-1200 Operating Regimes in Belarusian NPP No. 1. Atomic Energy. 2022, vol. 131, pp. 241-248. Available at: https://link.springer.com/article/10.1007/s10512-022-00873-5 (accessed 04.08.2023). DOI: https://doi.org/10.1007/s10512-022-00873-5
  18. Dolgopolov N.Yu. Mezentsev P.P. Results of tests of maneuverable modes at NPP power units-2006. Collection of abstracts of the 6th International Scientific and Technical Conference «Commissioning of NPP», Moscow: Atomtehenergo, pp. 11-12 (in Russian).
  19. Arkadov G.V., Pavelko V.I., Slepov M.T. Vibroacoustics in applications to the VVER91200 reactor plant. Series: Library of Technical Diagnostics of Nuclear Power Plants. Moscow: Nauka, 2018, 469 p. ISBN 978-5-02-040138-9 (in Russian).
  20. Arkadov G.V., Pavelko V.I., Slepov M.T. Noise monitoring in applications to the VVER91200 reactor plant. Series: Library of Technical Diagnostics of Nuclear Power Plants. Moscow: Nauka, 2021, 222 p. ISBN 978-5-02-040869-2 (in Russian).

VVER-1200 xenon oscillations offset boron regulation steam phase neutron noise spectrum acoustic standing waves

Link for citing the article: Arkadov G.V., Pavelko V.I., Slepov M.T. An Analysis of the «Fast» Noise Measurements of the Dynamic VVER processes. Izvestiya vuzov. Yadernaya Energetika. 2023, no. 4, pp. 19-36; DOI: https://doi.org/10.26583/npe.2023.4.02 (in Russian).

Open PDF file