翻訳と辞書 Words near each other ・ Airborne interception radar ・ Airborne Launch Assist Space Access ・ Airborne Launch Control Center ・ Airborne Launch Control System ・ Airborne leaflet propaganda ・ Airborne lifeboat ・ Airborne Maintenance & Engineering Services ・ Airborne March ・ Airborne Mine Countermeasures Weapon Systems Training School ・ Airborne Museum ・ Airborne Museum 'Hartenstein' ・ Airborne Museum (Sainte-Mère-Église) ・ Airborne Networking ・ Airborne observatory ・ Airborne Outback ・ Airborne particulate radioactivity monitoring ・ Airborne Precision Spacing ・ Airborne radio relay ・ Airborne Ranger ・ Airborne real-time cueing hyperspectral enhanced reconnaissance ・ Airborne Redback ・ Airborne Science Program ・ Airborne Sting ・ Airborne Surveillance Platform ・ Airborne T-Lite ・ Airborne Tactical Advantage Company ・ Airborne visible/infrared imaging spectrometer ・ Airborne Warning and Control System ・ Airborne Wind Energy Industry Association ・ Airborne wind shear detection and alert system Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Airborne particulate radioactivity monitoring ： ウィキペディア英語版 Airborne particulate radioactivity monitoring Continuous particulate air monitors (CPAMs) have been used for years in nuclear facilities to assess airborne particulate radioactivity (APR). In more recent times they may also be used to monitor people in their homes for the presence of manmade radioactivity. These monitors can be used to trigger alarms, indicating to personnel that they should evacuate an area. This article will focus on CPAM use in nuclear power plants, as opposed to other nuclear fuel-cycle facilities, or laboratories, or public-safety applications. In nuclear power plants, CPAMs are used for measuring releases of APR from the facility, monitoring levels of APR for protection of plant personnel, monitoring the air in the reactor containment structure to detect leakage from the reactor systems, and to control ventilation fans, when the APR level has exceeded a defined threshold in the ventilation system. == Introduction == CPAMs use a pump to draw air through a filter medium to collect airborne particulate matter that carries very small particles of radioactive material; the air itself is not radioactive.〔For the material in this introductory section, see, e.g., Harrer and Beckerley, ''Nuclear Power Reactor Instrumentation Systems Handbook'', TID-25952-P1, NTIS (1973), Vol. 2 Section 13.6.2, ISBN 0-87079-005-6; Eisenbud, ''Environmental Radioactivity'', Academic (1973), p. 449; ''Assessment of Airborne Radioactivity'', International Atomic Energy Agency (1967), p. 24〕 The particulate radioactive material might be natural, e.g., radon decay products ("progeny", e.g., 212Pb), or manmade, usually fission or activation products (e.g., 137Cs), or a combination of both. There are also "gas monitors" which pass the air through a sample chamber volume which is viewed continuously by a radiation detector. Radionuclides that occur in the gaseous form (e.g., 85Kr) are not collected on the CPAM filter to any appreciable extent, so that a separate monitoring system is needed to assess these nuclide concentrations in the sampled air. These gas monitors are often placed downstream of a CPAM so that any particulate matter in the sampled air is collected by the CPAM and thus will not contaminate the gas monitor's sample chamber. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Airborne particulate radioactivity monitoring」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.