Add a disappearance of radioactive!

On August 14, Department of Radiation Control and Safety sent an inspection team to Song Da Cement Joint Stock Company. This unit has just lost the radioactive Cs-137 .

On the morning of August 14, an inspection team consisting of 5 people was inspected and clarified by Mr. Nguyen Hao Quang - Head of Technical Assistance and Incident Response Department of the Control and Radiation Department. .

At the same time, in the morning of August 14, the Department of Radiation Control and Safety contacted Police Department A17 - Department of Economic Police Police organized a delegation of 8 people to Hoa Binh and reported to the Ministry of Science. and Technology in briefings this morning.

The loss of radiation is known as follows.

Song Da Cement Joint Stock Company conducts major repairs of equipment of production lines throughout the Company.

In recent years, many radiation losses have occurred . On December 23, 2003, Viet Trung Cement Joint Stock Company (Co Dong village, Thanh Hai commune, Thanh Liem district, Ha Nam province) has lost radioactive source Cs-137 to measure the level serving the automatic discharge of clinker.Up to now, there has been no published information to recover this radioactive source.

Earlier, on October 31, 2002 in the area of ​​Hyundai - Vinashin Shipyard Company Limited (HVS), Khanh Hoa province, a group of 03 workers photographing industrial radioactivity of Alpha Company Limited while conducting taking photos of industrial radioactivity with equipment using gamma Ir-192 radioactive source, activity of 42.45 Ci had trouble trapping power.Most recently, on May 26, the Institute of Rare Radiation Technology also lost 54.8 mg of radioactive material.The thief took the radioactive box to sell to a scrap collection point.

On July 28, the Lo Nung production line stopped production to carry out the equipment repair. On July 30, when repairing the bottom of the kiln (location of gamma ray equipment), the gamma ray generator was removed from the control position and placed at the concrete floor position of the bottom of the Nung furnace and was Keep tightly closed with a protective box dedicated to the outer shell with a corrugated iron inside closed with lead plates.

At 9:30 am on August 8, the staff of the M&E management office and the Lo Nung factory staff checked the equipment and prepared to be installed in the operating position and found the lost Gamma ray generator lost. Clin ke exhaust bottom furnace. The safety box of Gamma ray generator is also " flying without wings ".

Gamma ray generator has a rectangular box shape with the size of about 100 x 120 x 100 the outer shell is painted gray, all three sides have radioactive symbols.

This Clin ke exhaust controller Gamma ray generator was produced in 1990 in the Russian Federal Republic serial number 750, named radioisotope is Cs-137.

And the safety protection box of the Gamma ray generator when not in use has 5 faces with the size of about 200 x 200, the outer shell is a layer of black painted brown antirust paint, the inside of the box is covered with thick four-sided lead plate about 5-6 mm. Safe box to protect gamma ray box when not in use weighing about 5-7 kg.

Immediately after detecting the loss of the Gamma ray generator, the Company made a report and organized a search in the whole Company, made an official report to the Police Department of Tan Hoa Ward, Cong An town of Hoa Binh town to have coordinated measures, tracing gamma ray generator and lost protection box.

By 17 pm 13/8, Song Da Cement Joint Stock Company has sent a report to the Department of Radiation Safety Control.

On the afternoon of August 14, Mr. Ngo Dang Nhan - Director of the Department of Radiation Control and Safety, said, "This lost gamma ray emission is a closed source. Therefore, the radioactive rays are not dispersed out. as an open source, even when the protection box is broken ".

Conducting radioactive erasure at the point of purchase of waste, which was mistakenly bought . radioactive substance in the Institute of Rare Radiation Technology for radioactive theft on May 26, 2006.(Photo: VNN)

On the evening of August 14, talking with reporters on the way from Hoa Binh to Hanoi, Nguyen Hao Quang said, "We have reviewed and searched to see if the source remains in the factory staff. At the same time, they I went to some suspicious source procurement facilities that had been smashed but the results have yet to be found.

We have asked the Plant to continue to work with the Public Security Bureau to implement the necessary operations in conjunction with the Department of Science and Technology of Hoa Binh Province to continue the search and clarification. "

In the case of the loss of radioactive source Cs-137 at Viet Trung Cement Joint Stock Company (Ha Nam province) on December 23, 2003, experts of the Department of Radiation Control and Safety assessed the danger level of the try as follows: "When the source is lost, if the source is removed from the protection box and shielded from radiation, it will cause irradiation to people at a distance near the source with a large dose rate, dangerous to health.

Furthermore, if the source is broken, the radioactive material will leak into the environment causing radioactive contamination. If the source is mixed into metal scrap as a raw material for steel factories, smelting and cooking facilities, the source will be melted into a steel furnace and the amount of steel produced is contaminated with radioactivity, affecting the power. healthy people.

Cs-137 source has a half-life of 30 years. Therefore, it can survive in the environment for a long time, increasing the risk of irradiation to the people. "

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