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Orphan Source
An orphan source is a self-contained radioactive source that is no longer under proper regulatory control. The United States Nuclear Regulatory Commission defines an orphan source more exactly as: ...a sealed source of radioactive material contained in a small volume—but not radioactively contaminated soils and bulk metals—in any one or more of the following conditions *In an uncontrolled condition that requires removal to protect public health and safety from a radiological threat *Controlled or uncontrolled, but for which a responsible party cannot be readily identified *Controlled, but the material's continued security cannot be assured. If held by a licensee, the licensee has few or no options for, or is incapable of providing for, the safe disposition of the material *In the possession of a person, not licensed to possess the material, who did not seek to possess the material *In the possession of a State radiological protection program for the sole purpose of mitigati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radioactive Decay
Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay ( ), beta decay ( ), and gamma decay ( ), all of which involve emitting one or more particles. The weak force is the mechanism that is responsible for beta decay, while the other two are governed by the electromagnetism and nuclear force. A fourth type of common decay is electron capture, in which an unstable nucleus captures an inner electron from one of the electron shells. The loss of that electron from the shell results in a cascade of electrons dropping down to that lower shell resulting in emission of discrete X-rays from the transitions. A common example is iodine-125 commonly used in medical settings. Radioactive decay is a stochastic (i.e. random) pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leningrad Oblast
Leningrad Oblast ( rus, Ленинградская область, Leningradskaya oblast’, lʲɪnʲɪnˈgratskəjə ˈobləsʲtʲ, , ) is a federal subject of Russia (an oblast). It was established on 1 August 1927, although it was not until 1946 that the oblast's borders had been mostly settled in their present position. The oblast was named after the city of Leningrad. In 1991, the city restored its original name, Saint Petersburg, but the oblast retains the name of Leningrad. The capital and largest city is Gatchina. The oblast overlaps the historic region of Ingria and is bordered by Finland (Kymenlaakso and South Karelia) in the northwest and Estonia ( Ida-Viru County) in the west, as well as five federal subjects of Russia: the Republic of Karelia in the northeast, Vologda Oblast in the east, Novgorod Oblast in the south, Pskov Oblast in the southwest, and the federal city of Saint Petersburg in the west. The first governor of Leningrad Oblast was Vadim Gustov (in 1996 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mayapuri
Mayapuri is an industrial locality in West Delhi. It used to be a major hub of heavy metal and small scale industries, but following recent government sanctions, most of the heavy metal industries moved out. The place is now a combination of residential area, light metal factories, scrap markets, and automobile service stations. In 2010, a major radiation accident took place in the scrap yards of Mayapuri. There are some famous landmarks in the area like the Food Corporation of India, Metal Forging and Deen Dayal Upadhyay Hospital. The area is connected with Delhi Metro by Mayapuri station. Mayapuri is also one of the major bus terminals for the Delhi Transport Corporation (DTC). 2010 Mayapuri radiological accident In the early April of 2010, Mayapuri was affected by a serious radiological accident. An AECL Gammacell 220 research irradiator owned by Delhi University since 1968, but unused since 1985, was negligently sold at an auction to a scrap metal dealer in Mayapuri on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mayapuri Radiological Accident
Mayapuri is an industrial locality in West Delhi. It used to be a major hub of heavy metal and small scale industries, but following recent government sanctions, most of the heavy metal industries moved out. The place is now a combination of residential area, light metal factories, scrap markets, and automobile service stations. In 2010, a major radiation accident took place in the scrap yards of Mayapuri. There are some famous landmarks in the area like the Food Corporation of India, Metal Forging and Deen Dayal Upadhyay Hospital. The area is connected with Delhi Metro by Mayapuri station. Mayapuri is also one of the major bus terminals for the Delhi Transport Corporation (DTC). 2010 Mayapuri radiological accident In the early April of 2010, Mayapuri was affected by a serious radiological accident. An AECL Gammacell 220 research irradiator owned by Delhi University since 1968, but unused since 1985, was negligently sold at an auction to a scrap metal dealer in Mayapuri on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karachi
Karachi (; ur, ; ; ) is the most populous city in Pakistan and 12th most populous city in the world, with a population of over 20 million. It is situated at the southern tip of the country along the Arabian Sea coast. It is the former capital of Pakistan and capital of the province of Sindh. Ranked as a beta-global city, it is Pakistan's premier industrial and financial centre, with an estimated GDP of over $200 billion ( PPP) . Karachi paid $9billion (25% of whole country) as tax during fiscal year July 2021 to May 2022 according to FBR report. Karachi is Pakistan's most cosmopolitan city, linguistically, ethnically, and religiously diverse, as well as one of Pakistan's most secular and socially liberal cities. Karachi serves as a transport hub, and contains Pakistan’s two largest seaports, the Port of Karachi and Port Qasim, as well as Pakistan's busiest airport, Jinnah International Airport. Karachi is also a media center, home to news channels, film and f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Atomic Energy Agency
The International Atomic Energy Agency (IAEA) is an intergovernmental organization that seeks to promote the peaceful use of nuclear energy and to inhibit its use for any military purpose, including nuclear weapons. It was established in 1957 as an autonomous organization within the United Nations system; though governed by its own founding treaty, the organization reports to both the General Assembly and the Security Council of the United Nations, and is headquartered at the UN Office at Vienna, Austria. The IAEA was created in response to growing international concern toward nuclear weapons, especially amid rising tensions between the foremost nuclear powers, the United States and the Soviet Union. U.S. President Dwight D. Eisenhower's " Atoms for Peace" speech, which called for the creation of an international organization to monitor the global proliferation of nuclear resources and technology, is credited with catalyzing the formation of the IAEA, whose treaty came i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Strontium-90
Strontium-90 () is a radioactive isotope of strontium produced by nuclear fission, with a half-life of 28.8 years. It undergoes β− decay into yttrium-90, with a decay energy of 0.546 MeV. Strontium-90 has applications in medicine and industry and is an isotope of concern in fallout from nuclear weapons, nuclear weapons testing, and nuclear accidents. Radioactivity Naturally occurring strontium is nonradioactive and nontoxic at levels normally found in the environment, but 90Sr is a radiation hazard. 90Sr undergoes β− decay with a half-life of 28.79 years and a decay energy of 0.546 MeV distributed to an electron, an antineutrino, and the yttrium isotope 90Y, which in turn undergoes β− decay with a half-life of 64 hours and a decay energy of 2.28 MeV distributed to an electron, an antineutrino, and 90Zr (zirconium), which is stable. Note that 90Sr/Y is almost a pure beta particle source; the gamma photon emission from the decay of 90Y is so infrequent t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inguri River
The Enguri ( ka, ენგური, tr, xmf, ინგირი, ingiri, ab, Егры, ''Egry'' russian: Ингури, ''Inguri'') is a river in western Georgia. It is long, and has a drainage basin of . National Statistics Office of Georgia, Tbilisi, 2020, p. 12. It originates near in northeastern and plays an important role providing power to the area. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lia Radiological Accident
The Lia radiological accident began on December 2, 2001, with the discovery of two orphan radiation sources near the Enguri Dam in Tsalenjikha District in the country of Georgia. Three villagers from were unknowingly exposed. All three men were injured, one of whom eventually died. The accident was a result of unlabeled radioisotope thermoelectric generator cores which had been improperly dismantled and left behind from the Soviet era. The International Atomic Energy Agency led recovery operations and organized medical care. Source of the radioactive material In the early 1980s, a series of radio relays were built to connect the Enguri Dam with the Hudoni Dam, which was under construction. The relays were in remote territory with no reliable access to electricity, and thus were powered with a series of eight radioisotope thermoelectric generators (RTGs) manufactured in 1983. Each RTG was a Beta-M type powered by strontium-90, and contained some 12951480 TBq of radioactiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egypt
Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia via a land bridge formed by the Sinai Peninsula. It is bordered by the Mediterranean Sea to the north, the Gaza Strip of Palestine and Israel to the northeast, the Red Sea to the east, Sudan to the south, and Libya to the west. The Gulf of Aqaba in the northeast separates Egypt from Jordan and Saudi Arabia. Cairo is the capital and largest city of Egypt, while Alexandria, the second-largest city, is an important industrial and tourist hub at the Mediterranean coast. At approximately 100 million inhabitants, Egypt is the 14th-most populated country in the world. Egypt has one of the longest histories of any country, tracing its heritage along the Nile Delta back to the 6th–4th millennia BCE. Considered a cradle of civilisation, Ancient Egypt saw some of the earliest developments of writing, agriculture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Qalyubia Governorate
Qalyubia Governorate ( ar, محافظة القليوبية ' ) is one of the governorates of Egypt. Located in Lower Egypt. It is situated north of Cairo in the Nile Delta region. Its capital is Banha. Name Name of Qalubiyya governorate is drived from Qalyub city in it. Qalyub is drived from Calliope. Calliope is an ancient Greek goddess,the Muse of epic poetry. Geography Banha and several other settlements blend into the neighboring Cairo Governorate; as a result, parts of Qalyubia (particularly Shubra El Kheima) are generally considered to form part of the Greater Cairo metropolitan area (along with Cairo governorate, Giza city and 6 October city). Municipal divisions The governorate is divided into the following municipal divisions for administrative purposes, with a total estimated population as of July 2017 of 5,647,716. In some instances there is a markaz and a kism with the same name. Population According to population estimates, in 2015 the majority of residents ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cobalt Therapy
Cobalt therapy is the medical use of gamma rays from the radioisotope cobalt-60 to treat conditions such as cancer. Beginning in the 1950s, cobalt-60 was widely used in external beam radiotherapy (teletherapy) machines, which produced a beam of gamma rays which was directed into the patient's body to kill tumor tissue. Because these "cobalt machines" were expensive and required specialist support, they were often housed in ''cobalt units''. Cobalt therapy was a revolutionary advance in radiotherapy in the post-World War II period but is now being replaced by other technologies such as linear accelerators. History Before the development of medical linear accelerators in the 1970s, the only artificial radiation source used for teletherapy was the x-ray tube. Researchers found ordinary x-ray tubes, which used voltages of 50-150 keV, could treat superficial tumors, but did not have the energy to reach tumors deep in the body. To have the penetrating ability to reach dee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
