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Long-Term Aging of Chernobyl Fuel Debris: Corium and “Lava”

Author

Listed:
  • Bella Zubekhina

    (V.G. Khlopin Radium Institute, 28, 2-nd Murinskiy Ave., 194021 St. Petersburg, Russia
    Chemical Department, Lomonosov Moscow State University, 1, Leninskie Gory, 119991 Moscow, Russia)

  • Boris Burakov

    (V.G. Khlopin Radium Institute, 28, 2-nd Murinskiy Ave., 194021 St. Petersburg, Russia
    Ioffe Institute, 26, Politekhnicheskaya, 194021 St. Petersburg, Russia)

  • Ekaterina Silanteva

    (V.G. Khlopin Radium Institute, 28, 2-nd Murinskiy Ave., 194021 St. Petersburg, Russia
    Ioffe Institute, 26, Politekhnicheskaya, 194021 St. Petersburg, Russia)

  • Yuri Petrov

    (V.G. Khlopin Radium Institute, 28, 2-nd Murinskiy Ave., 194021 St. Petersburg, Russia)

  • Vasiliy Yapaskurt

    (Geological Department, Lomonosov Moscow State University, 1, Leninskie Gory, 119991 Moscow, Russia)

  • Dmitry Danilovich

    (Faculty of Chemistry of Substances and Materials, Saint-Petersburg State Institute of Technology (Technical University), 26, Moskovskii Ave., 190013 St. Petersburg, Russia)

Abstract

Samples of Chernobyl fuel debris, including massive corium and “lava” were collected inside the Chernobyl “Sarcophagus” or “Shelter” in 1990, transported to Leningrad (St. Petersburg) and stored under laboratory conditions for many years. In 2011 aged samples were visually re-examined and it was confirmed that most of them remained intact, although some evidence of self-destruction and chemical alteration were clearly observed. Selected samples of corium and “lava” were affected by static leaching at temperatures of 25, 90 and 150 °C in distilled water. A normalized Pu mass loss (NL Pu ) from corium samples after 140 days was noted to be 0.5 g/m 2 at 25 °C and 1.1 g/m 2 at 90 °C. For “lava” samples NL Pu was 2.2–2.3 g/m 2 at 90 °C for 140 days. The formation of secondary uranyl phases on the surface of corium and “lava” samples altered at 150 °C was confirmed. The results obtained are considered as an important basis for the simulation of fuel debris aging at Fukushima Daiichi nuclear power plant (NPP).

Suggested Citation

  • Bella Zubekhina & Boris Burakov & Ekaterina Silanteva & Yuri Petrov & Vasiliy Yapaskurt & Dmitry Danilovich, 2021. "Long-Term Aging of Chernobyl Fuel Debris: Corium and “Lava”," Sustainability, MDPI, vol. 13(3), pages 1-9, January.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:3:p:1073-:d:484211
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