07-09U

On the basis of results of spectral-luminescent properties of K$_{2}$LaX$_{5}$-type mono- and nanocrystals, activated by Ce$^{3+}$ (X=Cl, I) ions, let us suppose, that crystalline inclusions of U$_{z}$Zr$_{y}$O$_{x}$, ZrSiO$_{4}$, FeSiO$_{4}$, U$_{1-x}$Zr$_{x}$SiO$_{4}$-type may concentrate the sources of high-energy $\alpha $-, $\beta $-, $\gamma $-rays ($^{239}$Pu, $^{241}$Am, $^{244}$Cm, $^{137}$Cs), which, for one's turn, may promote destruction of LFCM and going on the surface of chips the activated and nonactivated crystalline inclusions (dust, smoke) of above-named composition.