Effect of high-temperature VVER-1000 SNF processing duration on the extent of fission product removal

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Experiments on high-temperature processing of VVER-1000 SNF with a burnout depth of 47 GW day/tU were carried out in order to determine the dependence of the extent of semi-volatile fission product removal on the time of SNF processing in an oxidizing atmosphere for subsequent optimization of technological modes of this process. It was found that, during high-temperature processing at 1200°С for 8 h, more than 30% of Mo, 90% of Cs, and 100% of Ru and Tc are removed.

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Sobre autores

I. Skrigan

Khlopin Radium Institute

Autor responsável pela correspondência
Email: ilya.skrigan@khlopin.ru
Rússia, 2-i Murinskii pr., 28, St. Petersburg, 194021

M. Metalidi

Khlopin Radium Institute

Email: ilya.skrigan@khlopin.ru
Rússia, 2-i Murinskii pr., 28, St. Petersburg, 194021

R. Ismailov

Khlopin Radium Institute

Email: ilya.skrigan@khlopin.ru
Rússia, 2-i Murinskii pr., 28, St. Petersburg, 194021

S. Shapovalov

Khlopin Radium Institute

Email: ilya.skrigan@khlopin.ru
Rússia, 2-i Murinskii pr., 28, St. Petersburg, 194021

A. Shadrin

Science and Innovations Private Enterprise

Email: ilya.skrigan@khlopin.ru
Rússia, Kadashevskaya nab. 32/2, str. 1, Moscow, 115035

D. Ryabkov

Khlopin Radium Institute

Email: ilya.skrigan@khlopin.ru
Rússia, 2-i Murinskii pr., 28, St. Petersburg, 194021

R. Serebryanskikh

Khlopin Radium Institute

Email: ilya.skrigan@khlopin.ru
Rússia, 2-i Murinskii pr., 28, St. Petersburg, 194021

Bibliografia

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  3. Goode J.H., Vaughen C.C.A. Voloxidation Tests with Irradiated Fuels. ORNL-TM-3723. 1973.
  4. Groenier W.S. Current Position and Status of the Voloxidation Process at ORNL. ORNL/CF-77/67. 1977.
  5. Воронова Н.М., Софронова Р.М., Войтехова Е.А. Высокотемпературная химия окислов урана и их соединений. М.: Атомиздат, 1971. C. 360.
  6. Металиди М.М., Исмаилов Р.В., Шаповалов С.В. // Х Рос. конф. с международным участием «Радиохимия 2022»: Тез. докл. СПб., 26–30.09.2022 г. М.: Месол, 2022. С. 292.
  7. Металиди М.М., Шаповалов С.В., Исмаилов Р.В., Скриплёв М.И., Безносюк В.И., Федоров Ю.С. // Радиохимия. 2015. Т. 57. № 1. С. 86–89.
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  9. Westphal B.R., Bateman K.J., Lind R.P., Howden K.L., Del Cul G.D. // Int. Conf. “Global 2005”. Tsukuba, Oct. 9–13, 2005. P. 345.
  10. Park J.J., Lee J. W., Shin J. M., Park G.I., Song K.C., Lee J.W. // Int. Conf. “Global 2009”. Paris, Sept. 6–11, 2009. P. 122.
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  12. Westphal B.R., Bateman K.J., Morgan C.D., Berg J.F., Crane P.J., Cummings D.G., Giglio J.J., Huntley M.W., Lind R.P., Sell D.A. // Nucl. Technol. 2008. Vol. 162. N 2. P. 153–157.

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2. Fig. 1. External view of the crucible for loading spent nuclear fuel (a) and the reactor (b).

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3. Fig. 2. Simplified diagram of the experimental setup for two-stage voloxidation. 1 – reactor; 2 – crucible with spent nuclear fuel powder (crucible weight 51 g); 3 – refrigerator; 4 – bubblers; 5 – separator with an aerosol filter based on aluminosilicate wool.

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4. Fig. 3. Dependence of temperature and oxygen concentration in the reaction zone on time.

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5. Fig. 4. External appearance of the WTO installation.

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6. Fig. 5. Degree of distillation of semi-volatile FP during VTO of WWER-1000 SNF.

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