Unknown event in Viet Nam on Mon 29th May 2006

On May 29th, 2006, the Eu-152 radioactive source with an activity of 25 mCi at 10/1995 was lost when being kept at a temporary storage facility. At this moment, the factory was under repairment. At 10h30 of May 31st, 2006, the police office informed that the the radioactive might be kept at No 628, Bạch Đằng street, Hai Bà Trưng district, Hà Nội (an garbage collection area), The radioactive source container had been broken, causing contamination to the house. The Institute for Technology of Radioactive and Rare Elements (ITRRE), and VINATOM offficers, under the supervision of VARANS, had carried out decontamination activities immediately after the address of 628 Bạch Đằng street had been identified as dispersion point. Dose calculation result shows that persons stayed in the house received a dose of at least 5 mili Sievert (assumed that he/she stayed in the house 24h per day in 5 consecutive days from 26/5 to 1/6/2006)