Spectrum Shape Change of Alanine/esr Spectrum in Nuclear Power Plant

Major elements that affect aging of cable material which had been installed for power and signal transferring in nuclear power plant were already well known as 'temperature', thermal energy accumulated in polymer based cable material, and 'radiation' which caused oxidation by induced radicals. Personal dosimeter like TLD(Thermo Luminiscence Dosimeter), or OSL(Optically Stimulated Luminiscence), is nor appropriate for measuring such a long time measurement, at least one or two year period. The strong point of alanine/ESR dosimeter is not only low fading rate(1%/year) but also little environmental temperature effect(0.2%/K) and comparably low humidity effect. The 'x/y ratio' were know as being decided as population of free radicals which influenced by LET difference of each radiation in mixed radiation field. As we can see figure 2, spectrum shape of alanine from that of only gamma exposed alanine pallet spectrum. This decrease of ratio is known as being determined by relative ratio of radicals by each radiation, gamma and neutrons, and factors for each populations