PAPERWORK PRESENTING FOR ANNUAL INVENTORY

All institutions, which are using sources can be split in to 4 different groups depending on his practice. That will be education and research institution (institute, university), health care institution (hospitals, clinics, odontological cabinets), industrial objects (factories, printing-houses) and other practices (libraries, museum and other). The most sources in use are at the Ignalina nuclear power – plant (about 40% of all sources) being the largest industrial objects and health care institutions.
The Number of objects in service and practice with sources is increasing. The number of orthodontical cabinets, used in dental X-ray with the devices has increased and so to an increase in the number of X-ray generators are being seen. However the total number of sources in use in Lithuania is decreasing. In the last several years a significant decrease in the number of sealed sources used in static electric charge neutralizers and smoke detectors has been reducing.
The highest number of sources used in the country is the sealed sources, and 75% of them are used in smoke detectors of KI-1, RID-1 and RID-6M types. Each of them contains 1 or 2 sources with 239Pu isotope. The activity of KI-1 and RID-1 type detectors is 37 MBq, the activity of RID-6M - 0.37 MBq. The distribution of other mostly used sealed sources according to their purpose is given in Figure 6. Sources used in radiotherapy and gamma radiography are of the highest activity: 60Co source (initial activity is 250 TBq), 75Se and 192Ir sources (initial activities are 4.5 and 3.7 TBq, respectively).
Number of X-ray generators in Lithuania is small. The X-ray generators are most widely used for diagnostics in health care institutions and dental practices.
In Lithuania unsealed sources are used in education and research and in health care institutions. In research they use unsealed sources containing 32P, 33P, 3H, 14C and 35S, for diagnostics and treatment of various deceases - 99mTc, 125I, 131I and other radionuclides (57Co, 89Sr).

 

Last update 2010-06-18