Study of evaporating the irradiated graphite in equilibrium low-temperature plasma
- Авторлар: Bespala E.V.1, Novoselov I.Y.2, Pavlyuk A.O.1, Kotlyarevskiy S.G.1
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Мекемелер:
- Pilot and Demonstration Center for Decommissioning of Uranium-Graphite Nuclear Reactors (PDC UGR)
- Tomsk Polytechnic University
- Шығарылым: Том 25, № 1 (2018)
- Беттер: 109-117
- Бөлім: Article
- URL: https://journals.rcsi.science/1531-8699/article/view/217315
- DOI: https://doi.org/10.1134/S0869864318010109
- ID: 217315
Дәйексөз келтіру
Аннотация
The paper describes a problem of accumulation of irradiated graphite due to operation of uranium-graphite nuclear reactors. The main noncarbon contaminants that contribute to the overall activity of graphite elements are iso-topes 137Cs, 60Co, 90Sr, 36Cl, and 3H. A method was developed for processing of irradiated graphite ensuring the volu-metric decontamination of samples. The calculation results are presented for equilibrium composition of plasma-chemical reactions in systems “irradiated graphite−argon” and “irradiated graphite−helium” for a wide range of tem-peratures. The paper describes a developed mathematical model for the process of purification of a porous graphite surface treated by equilibrium low-temperature plasma. The simulation results are presented for the rate of sublimation of radioactive contaminants as a function of plasma temperature and plasma flow velocity when different plasma-forming gases are used. The extraction coefficient for the contaminant 137Cs from the outer side of graphite pores was calculated. The calculations demonstrated the advantages of using a lighter plasma forming gas, i.e., helium.
Негізгі сөздер
Авторлар туралы
E. Bespala
Pilot and Demonstration Center for Decommissioning of Uranium-Graphite Nuclear Reactors (PDC UGR)
Хат алмасуға жауапты Автор.
Email: bespala_evgeny@mail.ru
Ресей, Seversk
I. Novoselov
Tomsk Polytechnic University
Email: bespala_evgeny@mail.ru
Ресей, Tomsk
A. Pavlyuk
Pilot and Demonstration Center for Decommissioning of Uranium-Graphite Nuclear Reactors (PDC UGR)
Email: bespala_evgeny@mail.ru
Ресей, Seversk
S. Kotlyarevskiy
Pilot and Demonstration Center for Decommissioning of Uranium-Graphite Nuclear Reactors (PDC UGR)
Email: bespala_evgeny@mail.ru
Ресей, Seversk
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