Search - Number 7 - THE ESTIMATION OF RADIOACTIVE AEROSOLS DEPOSITION IN SAMPLE-TAKING CHANNEL OF “BYPASS” SYSTEM OF THE “UKRYTTYA” OBJECT

THE ESTIMATION OF RADIOACTIVE AEROSOLS DEPOSITION IN SAMPLE-TAKING CHANNEL OF “BYPASS” SYSTEM OF THE “UKRYTTYA” OBJECT
Cover not present THE ESTIMATION OF RADIOACTIVE AEROSOLS DEPOSITION IN SAMPLE-TAKING CHANNEL OF “BYPASS” SYSTEM OF THE “UKRYTTYA” OBJECT
Category: Number 7
Publication: 7
Summary

In accordance with National standard of Ukraine "The main principles of radioactive matter samples taking from the air" calculations of aerosol deposition in sample-taking tube of "Bypass" system of the "Ukryttya" object of Chernobyl NPP are made. It is found, that in the tube with inner diameter 15 mm, length of horizontal parts 30 m and five rounds in angle 90? with linear velocity of air flow 1,9 m/s almost the all aerosols with diameter more then 5 µm won't pass to the ending sample-taking filter. Because of the average value of AMAD of radioactive aerosols in "Bypass" ventilation system is near 4 µm, the measured by standard methodic value of release to atmosphere from the "Ukryttya" object may be strongly lower.