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Adaptation of the RODOS system for analysis of possible sources of Ru-106 detected in 2017.

Abstract：

:In this work, we present a method to use the European nuclear emergency response system RODOS for analysis of potential sources of airborne radioactivity of an unknown origin. The method is based on a solution of adjoint equations, without modification of the code of long-range atmospheric dispersion model MATCH used in RODOS. The method has been successfully applied to the Ru-106 accident of 2017. The obtained spatial distribution of the correlation between simulations and measurements which could be achieved with source located in a given place, is in a qualitative agreement with analogous results published in other works. The high correlation is centered on the Ural Mountains; this is explained by a very wide expansion of the plume. However, the location of the maximum correlation obtained in this work is in the northern part of Russia, close to a military test site on Novaya Zemlya. This location is far away from the reprocessing plant Mayak in the South-Eastern Urals mentioned in other investigations as the most probable location of the source. In the results presented here, the correlation at the source location corresponding to the Mayak plant is still quite high (0.49); release inventory from this source of about 300 TBq could explain the observed measurements.

journal_name

J Environ Radioact

journal_title

Journal of environmental radioactivity

authors

Kovalets IV,Romanenko O,Synkevych R

doi

10.1016/j.jenvrad.2020.106302

subject

Has Abstract

pub_date

2020-09-01 00:00:00

pages

106302

eissn

0265-931X

issn

1879-1700

pii

S0265-931X(20)30171-5

journal_volume

220-221

pub_type

杂志文章

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