The source container with 98 TBq of Cs-137 and shielding made from dep
leted uranium has the total weight of 264 kg, height of 0.370 and diam
eter 0.272 m.The container is joined to accessories allowing movment o
f the radiation beam.The dose rate at a distance of 0.4 m in the beam
axis is 50 Gy/h. Various technical means are available for manipulatio
n and transport.The irradiation process proceeds according to a precal
culated program. The safety measures have been taken to secure the pos
sible application in historical buildings and similar objects.The lice
nce from health physics authorities has been obtained.The first irradi
ation process performed is described.