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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作者简介

I. Skrigan

Khlopin Radium Institute

编辑信件的主要联系方式.
Email: ilya.skrigan@khlopin.ru
俄罗斯联邦, 2-i Murinskii pr., 28, St. Petersburg, 194021

M. Metalidi

Khlopin Radium Institute

Email: ilya.skrigan@khlopin.ru
俄罗斯联邦, 2-i Murinskii pr., 28, St. Petersburg, 194021

R. Ismailov

Khlopin Radium Institute

Email: ilya.skrigan@khlopin.ru
俄罗斯联邦, 2-i Murinskii pr., 28, St. Petersburg, 194021

S. Shapovalov

Khlopin Radium Institute

Email: ilya.skrigan@khlopin.ru
俄罗斯联邦, 2-i Murinskii pr., 28, St. Petersburg, 194021

A. Shadrin

Science and Innovations Private Enterprise

Email: ilya.skrigan@khlopin.ru
俄罗斯联邦, Kadashevskaya nab. 32/2, str. 1, Moscow, 115035

D. Ryabkov

Khlopin Radium Institute

Email: ilya.skrigan@khlopin.ru
俄罗斯联邦, 2-i Murinskii pr., 28, St. Petersburg, 194021

R. Serebryanskikh

Khlopin Radium Institute

Email: ilya.skrigan@khlopin.ru
俄罗斯联邦, 2-i Murinskii pr., 28, St. Petersburg, 194021

参考

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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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