Search - Number 5 - ESTIMATION OF INHALATION DOSE ASSESSMENT AT EXPENSE OF THE RADIOACTIVE AEROSOL INTO AND THE VICINITY OF APERTURES OF UKRYTTYA

ESTIMATION OF INHALATION DOSE ASSESSMENT AT EXPENSE OF THE RADIOACTIVE AEROSOL INTO AND THE VICINITY OF APERTURES OF UKRYTTYA
Cover not present ESTIMATION OF INHALATION DOSE ASSESSMENT AT EXPENSE OF THE RADIOACTIVE  AEROSOL INTO AND THE VICINITY OF APERTURES OF UKRYTTYA
Category: Number 5
Publication: 5
Summary

The characteristics of radioactive aerosols through large apertures of object Shelter were assessed in two meserment periods 1996 - 1999 and 2000 - 2003. In 1996 - 1999 a total radionuclide flow rate of 274.1 Bq s-1 or 8.64 109 Bq y-1 was determined. The resulting total inhalation dose calculated from the individual experimental parameters was about 100 nSv h-1 and annual near 0.2 mS per year. Inhalation doses in the range of 100 nSv h-1 as determined at the apertures or in some periods in the Shelter vicinity would mean for construction workers of a new Shelter-2 an addition dose which is not negligible. Assuming an annual working time of 1710 h (standard working time in the European Union and Ukraine) the inhalation dose would sum up to about 0.2 mSv a-1. The annual dose for the indicated rooms was 1.9 mSv a-1 for the premises 406/2, 0.006 mSv a-1 for the room 208/10 and 10-4 mSv a-1 for the room 3.8.