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Samut Prakan Radiation Accident
A radiation accident occurred in Samut Prakan Province, Thailand in January–February 2000. The accident happened when an insecurely stored unlicensed cobalt-60 radiation source was recovered by scrap metal collectors who, together with a scrapyard worker, subsequently dismantled the container, unknowingly exposing themselves and others nearby to ionizing radiation. Over the following weeks, those exposed developed symptoms of radiation sickness and eventually sought medical attention. The Office of Atomic Energy for Peace (OAEP), Thailand's nuclear regulatory agency, was notified when doctors came to suspect radiation injury, some 17 days after the initial exposure. The OAEP sent an emergency response team to locate and contain the radiation source, which was estimated to have an activity of , and was eventually traced to its owner. Investigations found failure to ensure secure storage of the radiation source to be the root cause of the accident, which resulted in ten people bei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiotherapy
Radiation therapy or radiotherapy, often abbreviated RT, RTx, or XRT, is a therapy using ionizing radiation, generally provided as part of cancer treatment to control or kill malignant cells and normally delivered by a linear accelerator. Radiation therapy may be curative in a number of types of cancer if they are localized to one area of the body. It may also be used as part of adjuvant therapy, to prevent tumor recurrence after surgery to remove a primary malignant tumor (for example, early stages of breast cancer). Radiation therapy is synergistic with chemotherapy, and has been used before, during, and after chemotherapy in susceptible cancers. The subspecialty of oncology concerned with radiotherapy is called radiation oncology. A physician who practices in this subspecialty is a radiation oncologist. Radiation therapy is commonly applied to the cancerous tumor because of its ability to control cell growth. Ionizing radiation works by damaging the DNA of cancerous tissue l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phra Pradaeng District
Phra Pradaeng ( th, พระประแดง, ) is a district (''amphoe'') of Samut Prakan province in Thailand. History Phra Pradeang was the original center of the area south of Bangkok near the mouth of the Chao Phraya River. Originally named ''Nakhon Khuan Khan'' (นครเขื่อนขันธ์), it was settled by Mon people. In 1815, King Rama II built the Pom Phlaeng Faifa Fort at the river's bend. The fort is now a small park and is accessible to visitors. : In 1819, the new town Mueang Samut Prakan (or Paknam) was established. Due to economic problems in the early-1930s, several administrative entities were abolished, including Phra Phradaeng Province, which had its districts assigned to Samut Prakan and Thonburi effective 1 April 1932. A two kilometre tramway across the neck of the Phra Pradaeng river bend opened in 1908 and closed c. 1940. Operated by a private company, the motorised trams connected with motorboat services to Bangkok and to Paknam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Teletherapy Capsule
External beam radiotherapy (EBRT) is the most common form of radiotherapy (radiation therapy). The patient sits or lies on a couch and an external source of ionizing radiation is pointed at a particular part of the body. In contrast to brachytherapy (sealed source radiotherapy) and unsealed source radiotherapy, in which the radiation source is inside the body, external beam radiotherapy directs the radiation at the tumour from outside the body. Orthovoltage ("superficial") X-rays are used for treating skin cancer and superficial structures. Megavoltage X-rays are used to treat deep-seated tumours (e.g. bladder, bowel, prostate, lung, or brain), whereas megavoltage electron beams are typically used to treat superficial lesions extending to a depth of approximately 5 cm (increasing beam energy corresponds to greater penetration). X-rays and electron beams are by far the most widely used sources for external beam radiotherapy. A small number of centers operate experimental and pi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scrap
Scrap consists of Recycling, recyclable materials, usually metals, left over from product manufacturing and consumption, such as parts of vehicles, building supplies, and surplus materials. Unlike waste, scrap Waste valorization, has monetary value, especially recovered metals, and non-metallic materials are also recovered for recycling. Once collected, the materials are sorted into types — typically metal scrap will be crushed, shredded, and sorted using mechanical processes. Scrap recycling is important for creating a more sustainable economy or creating a circular economy, using significantly less energy and having far less environmental impact than producing metal from ore. Metal recycling, especially of structural steel, Ship breaking, ships, used manufactured goods, such as Vehicle recycling, vehicles and white goods, is a major industrial activity with complex networks of wrecking yards, sorting facilities and recycling plants. Processing Scrap metal originates both ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Prawet District
Prawet ( th, ประเวศ, ) is one of the 50 districts of Bangkok, Thailand. It is in the southeast. Neighboring districts are (from the east clockwise) Bang Phli ( Samut Prakan province), Bang Na, Phra Khanong, Suan Luang, Bang Kapi Bang Kapi ( th, บางกะปิ, ) is one of the 50 districts (''khet'') of Bangkok, Thailand. It is bounded by other Bangkok districts (from north clockwise): Bueng Kum, Saphan Sung, Prawet, Suan Luang, Huai Khwang, Wang Thonglang, an ..., Saphan Sung and Lat Krabang district, Lat Krabang (Bangkok). History Prawet was once part of Phra Khanong District. Prawet was elevated to become a separate district in 1989. Part of Prawet, especially the Suan Luang Sub-district, was carved out to establish Suan Luang District on 14 January 1994. Its name after Khlong Prawet Burirom, a canal that flows through the northern area. In October 2005 the plan to create the special administrative area Nakhon Suvarnabhumi Province, Nakhon Suv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nordion
Nordion Inc., a Sotera Health company, is a health science company that provides Cobalt-60 used for sterilization and treatment of disease (radiotherapy). Nordion is headquartered in Ottawa, Ontario, Canada, with facilities in Vancouver, British Columbia and Laval, Quebec. Kevin Brooks is the company's CEO. It was acquired by Sotera Health in 2014 for million (equivalent to $million in ). History Founded in 1946, originally the radium sales department of Eldorado Mining and Refining Ltd., the division developed one of the first teletherapy units that used the radioisotope cobalt-60 to destroy cancerous tumours. Soon after, the division was given responsibility for selling radioisotopes produced by the newly established Chalk River Nuclear Laboratories, a nuclear research facility at Chalk River, Ontario. As a result, in 1951, Eldorado established a commercial products division (CPD) to manage the isotope business, especially cobalt-60 used in cancer treatment. In 1952, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Office Of Atoms For Peace
The Office of Atoms for Peace (OAP) of Thailand (สำนักงานปรมาณูเพื่อสันติ) in Chatuchak district, Bangkok, Thailand, was established in 1961 as the Office of Atomic Energy for Peace. The OAP serves as the main authority for nuclear research in Thailand. The OAP employs approximately 400 people. The research topics and services provided at the OAP include radioisotope production, gamma radiography, neutron activation analysis, neutron radiography, and gemstone irradiation. The OAP operated a 2-megawatt nuclear research reactor, Thai Research Reactor 1/Modification 1 (TRR-1/M1). The TRR-1/M1 is of the type TRIGA Mark III, built by General Atomics, and began operation in 1962 after being commissioned in 1961 as a 1MW reactor. The TRR-1/M1 underwent its modification during 1975-1977, at which point it began operation as a 2MW reactor. TRR-1/M1 is the only nuclear reactor in Thailand. In 2006, OAP was divided into two separate entitie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radioisotope
A radionuclide (radioactive nuclide, radioisotope or radioactive isotope) is a nuclide that has excess nuclear energy, making it unstable. This excess energy can be used in one of three ways: emitted from the nucleus as gamma radiation; transferred to one of its electrons to release it as a conversion electron; or used to create and emit a new particle (alpha particle or beta particle) from the nucleus. During those processes, the radionuclide is said to undergo radioactive decay. These emissions are considered ionizing radiation because they are energetic enough to liberate an electron from another atom. The radioactive decay can produce a stable nuclide or will sometimes produce a new unstable radionuclide which may undergo further decay. Radioactive decay is a random process at the level of single atoms: it is impossible to predict when one particular atom will decay. However, for a collection of atoms of a single nuclide the decay rate, and thus the half-life (''t''1/2) for t ... [...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) proce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
