Nuotėkio iš Maišiagalos radioaktyviųjų atliekų saugyklos tyrimo rezultatai

Abstract

Radiological monitoring data covering the last decade are presented. The both liquid scintillation counting (LSC) and high-resolution gamma-spectrometry were used for analysis of samples. Tritium variation in groundwater, soil moisture and plants indicates the obvious leakage from the repository. Maximum activity concentration in soil moisture (about 100,000 Bq.L-1) was measured at the depth corresponding to the bottom of the vault. Analysis of some LSC spectra revealed possible contamination of groundwater by 137Cs. It has been confirmed by the gamma-spectrometry fo groundwater samples without pre-concentration. Enhanced activity concentration of 226Ra in soil was also determined in the additional borehole close to the vault.