For the nuclide with several gamma lines the average value of
S was determined by least
At the beginning of August 1986 the significantly
contaminated ETU regions were revealed and the suitable maps of
surface activity density spatial distribution for 131I,
103Ru, 106Ru, 140Ba+140La,
141Ce, 134Cs, 137Cs
radionuclides were constructed. The values of surface activity
density were recalculated to 20 May 1986. The absence of area
fill in some zones of these maps indicates the lack of information
for the radionuclide spatial distribution reconstruction in these
zones. It must be emphasized that this work took only 3 months.
This fact supports to the above method efficiency.