ASTM_C_1217_-_00_2012.pdf

Designation:C121700(Reapproved 2012)Standard Guide forDesign of Equipment for Processing Nuclear andRadioactive Materials1This standard is issued under the fixed designation C1217;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 Intent:1.1.1 This guide covers equipment used in shielded cell orcanyon facilities for the processing of nuclear and radioactivematerials.It is the intent of this guide to set down theconditions and practices that have been found necessary toensure against or to minimize the failures and outages ofequipment used under the subject circumstances.1.1.2 It is intended that this guide record the principles andcaveats that experience has shown to be essential to the design,fabrication,and installation of equipment capable of meetingthe stringent demands of operating,dependably and safely,ina nuclear processing environment that operators can neither seenor reach directly.1.1.3 This guide sets forth generalized criteria and guide-lines for the design,fabrication,and installation of equipmentused in this service.This service includes the processing ofradioactive wastes.Equipment is placed behind radiationshield walls and cannot be directly accessed by the operators orby maintenance personnel because of the radiation exposurehazards.In the type of shielded cell or canyon facility ofinterest to users of this guide,either the background radiationlevel remains high at all times or it is impractical to remove theprocess sources of radiation to facilitate in situ repairs or carryout maintenance procedures on equipment.The equipment isoperated remotely,either with or without visual access to theequipment.1.2 Applicability:1.2.1 This guide is intended to be applicable to equipmentused under one or more of the following conditions:1.2.1.1 The materials handled or processed constitute asignificant radiation hazard to man or to the environment.1.2.1.2 The equipment will generally be used over a long-term life cycle(for example,in excess of two years),butequipment intended for use over a shorter life cycle is notexcluded.1.2.1.3 The material handled or processed must be retained,contained,and confined within known bounds for reasons ofaccountability or to minimize the spread of radioactive con-tamination.1.2.1.4 The materials handled or processed must be kept andmaintained within one or more of the following conditions:(1)In a specific geometric array or configuration,and(2)Within a range of conditions that have been determinedto be a critically safe set of conditions for that piece ofequipment,that is,1)in a given and specified operationalposition where adjacent nuclear criticality interaction condi-tions are known and unchanging,2)for a given and specifiedset or range of operating conditions,and 3)for a given andspecified process.1.2.1.5 The equipment can neither be accessed directly forpurposes of operation or maintenance,nor can the equipmentbe viewed directly,for example,without intervening shieldedviewing windows,periscopes,or a television monitoring sys-tem.1.2.2 This guide is intended to be applicable to the design ofequipment for the processing of materials containing uraniumand transuranium elements in any physical form under thefollowing conditions:1.2.2.1 Such materials constitute an unacceptable radiationhazard to the operators and maintenance personnel,1.2.2.2 The need exists for the confinement of the in-processmaterial,of dusts and particulates,or of vapors and gasesarising or resulting from the handling and processing of suchmaterials,and1.2.2.3 Any of the conditions cited in 1.2.1 apply.1.2.3 This guide is intended to apply to the design,fabrication,and installation of ancillary and support servicesequipment under the following conditions:1.2.3.1 Such equipment is installed in shielded cell orcanyon environments,or1.2.3.2 Such equipment is an integral part of an in-cellprocessing equipment configuration,or an auxiliary componentor system thereof,even though an equipment item or systemmay not directly hold or contain nuclear or radioactive mate-rials under normal processing conditions.1This guide is under the jurisdiction of ASTM Committee C26 on Nuclear FuelCycle and is the direct responsibility of Subcommittee C26.09 on NuclearProcessing.Current edition approved June 1,2012 Published June 2012.Originallyapproved in 2000.Last previous edition approved in 2006 as C121700(2006).DOI:10.1520/C1217-00R12.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE1Upsets,accidents,or certain emergency conditions may bespecified(and thus required)design considerations,but not necessarilyacceptable or normal operating circumstances under this definition.1.2.4 This guide is intended to appl