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4. Determine the radiation dose D which will be received by workers of
rec.
facility (personnel composition of the formations) for a fixed period of work t .
w
This task can be solved according to the formula:

rad (8.4)

where ; ; ;

t – duration of stay (work) in the zone of contamination, hour;
w
K red. – coefficient of reduction of radiation levels (should be taken from table
8.8);
P – radiation level on 1 hour after the accident;
1
K t start and K t end – coefficient of conversion of radiation level at start time t

start and time of end t of stay in the contamination zone (t = t start +t );
w.
end
end
P start , P – radiation level at start time and time of end of stay in the
end
contamination zone.

Table 8.8 – The coefficient of reduction of radiation levels by buildings,
structures and vehicles, K red.
Buildings, From radioactive contamination
structures,
vehicles Windows Windows From
overlook the overlooking on
street with width opening area penetrating
radiation
with longer than
15-30 30-60 m 150 m
m

Industrial one-
storey buildings 7 7 7 5
(workshop)

Industrial,
administrative 6 6 6 4
three-storey
buildings

Stone one-storey
residential 13 12 10 6
buildings

Basement 50 46 37 -

Stone three-storey
residential 33 27 20 10
buildings

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