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General Classification of “Hot” Particles from the NearestChernobyl Contaminated Areas

Published online by Cambridge University Press:  03 September 2012

S. I. Shabalev ,
B. E. Burakov  and
E. B. Anderson
S. I. Shabalev
Affiliation:
V. G. Khlopin Radium Institute, 28, 2nd-Murinskiy Ave., St. Petersburg, 194021, RUSSIA Phone/Fax: +7+812 346–1129, E-mail: stas@riand.spb.su
B. E. Burakov
Affiliation:
V. G. Khlopin Radium Institute, 28, 2nd-Murinskiy Ave., St. Petersburg, 194021, RUSSIA Phone/Fax: +7+812 346–1129, E-mail: stas@riand.spb.su
E. B. Anderson
Affiliation:
V. G. Khlopin Radium Institute, 28, 2nd-Murinskiy Ave., St. Petersburg, 194021, RUSSIA Phone/Fax: +7+812 346–1129, E-mail: stas@riand.spb.su
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Abstract

The morphology and composition both chemical and radionuclide of the maintypes of the solid-phase “hot” particles formed following the accident onthe Chernobyl NPP have been studied by SEM, electron microprobe andgamma-spectrometry methods. Differences in many isotopes including: 106Ru, 134Cs, 137Cs dependent upon thehot particle matrix chemical composition was observed. The classification ofhot particles based upon the chemical composition of their matrices has beendone. It includes three main types: 1) fuel particles with UOxmatrix; 2) fuel-constructional particles with Zr-U-0 matrix, 3) hotparticles with metallic inclusions of Fe-Cr-Ni. Moreover, there are morerare types of hot particles with silicate or metal matrices. It was shownthat only metallic inclusions of Fe-Cr-Ni are concentrators of 106Ru, which caused this nuclides assimilation in the moltenstainless steel during the initial stages of the accident. Soilscontamination of non-radioactive lead oxide particles in the Chernobyl NPPregion were noticed. It was supposed that part of metallic lead, droppedfrom helicopters into burning reactor during first days of accident, wasevaporated and oxidized accompanying solid oxide particles formation.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 465: Symposium II – Scienfific Basis for Nuclear Waste Management XX , 1996 , 1343
Copyright
Copyright © Materials Research Society 1997

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References

REFERENCES

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