Chernobyl-Born Radionuclides In Geological Environment - Groundwater Vulnerability: Chernobyl Nuclear Disaster - page 31

Chemobyl NPP

N

W E

Chemobyl

S

Domanivka
Gornostaipi

Oster

Liubymivka

Sosnivka Dymir

Kalyta

Mircha

Lebedivk Litochky

Markivtsi

Liutizh

Borodyanka

Basan

Pukhivka
Dymirka
Gogoliv

Khotyanivka

Irpin

Brovary

Makariv
Sytnyaki

Senkivka

Shpytki Kyiv
Ghulyany

Bortnychi
Boryspil

Baryshivka

Vyshenki

Khodosivka

Protsiv

Kozyn

Gulyaky Vasylkiv Golovuriv

Borova

Stary Bezradychi

Fastiv

Kovalyn

Ghukivtsi

0 10 20

km

kBq/m 2 4 10 0 0 00 185 555 1480

Figure 2.2 Surface contamination with 137 Cs in the Kyiv urban area.

A series of 137 Cs solid-phase concentration measurements in the core material
from the Quaternary boreholes were also performed in the CEZ. A corresponding
typical vertical concentration profile is shown in Figure 2.4.
It is obvious that these results cannot be considered as representative of the
entire study area as they have been obtained in separate boreholes that could fall
in local surface zones of high contamination density.
Along with a core sample study, several series of deposit samples were ana-
lyzed taken from the lower part of the Kyiv marl bed (depth 80 m) in the course
of the Kyiv subway tunnel drilling. The results of 137 Cs content determinations
are shown in Figure 2.5. The solid-phase concentration of the radionuclide
increases along the section in the direction of the Syrets creek valley coinciding