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原文传递 CHARACTERIZING, FOR PACKAGING AND TRANSPORT, LARGE OBJECTS CONTAMINATED BY RADIOACTIVE MATERIAL HAVING AN UNLIMITED A2 VALUE

题名：	CHARACTERIZING, FOR PACKAGING AND TRANSPORT, LARGE OBJECTS CONTAMINATED BY RADIOACTIVE MATERIAL HAVING AN UNLIMITED A2 VALUE
作者：	R. B. Pope , L. B. Shappert . R D. Mchelhaugh , J. M Cash , and RE Best
关键词：	objects；limited；active；contam；material；transport；radio；large；dioa；package
摘要：	The International Atomic Energy Agency (IAEA) Regulations for the safe packaging and transportation of radioactive materials follow a graded approach to the requirements for both packaging and controls during transport. The concept is that, the lower the risk posed to the people and the environment by the contents, (a) the less demanding are the packaging requirements and (b) the smaller in number are the controls imposed on the transport of the material. There are likely to be a great number of situations arising in coming years when large objects, contaminated with radioactive material having unlimited A2 values will result from various decommissioning and decontamination (D&D) activities and will then require shipment from the D&D site to a disposal site. Such situations may arise relatively frequently during the cleanup of operations involving mining, milling, feedstock, and uranium enrichment processing facilities. Because these objects are contaminated with materials having an unlimited A2 value they present a low radiological risk to worker and public safety and to the environment during transport. However, when these radioactive materials reside on the surfaces of equipment and other large objects, where the equipment and objects themselves are not radioactive, the radioactive materials appear as surface contamination and, if the. contaminated object is categorized as a surface contaminated object (SCO-II)—either as SCO-1 or SCO-H—it would need to be packaged for shipment according to the requirements of the Regulations for SCO. Despite this categorization, alternatives may be available which will allow these contaminants, when considered by themselves for packaging and transport, to be categorized as cither (a) a limited quantity of radioactive material to be shipped in an excepted package or (b) low specific activity (LSA) materials —(SCO)—either as SCO-I or SCO-H—to be shipped in an IP-1 package or possibly even shipped unpackaged. These options, which offer alternatives to categorizing and packaging these large D&D objects either as SCO-H in IP-2 packages or as radioactive material in a Type A package, are discussed in this paper.
报告类型：	科技报告