1、Designation:D7013/D7013M15Standard Guide forCalibration Facility Setup for Nuclear Surface Gauges1This standard is issued under the fixed designation D7013/D7013M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revis
2、ion.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This guide outlines procedures for setup of a nucleargauge calibration facility in either a shielded bay or anunshielded areaGuide A
3、 and Guide B,respectively.1.2 This guide does not attempt to describe the calibrationtechniques or methods.It is assumed that this guide will beused by persons familiar with the operations of the gauge andin performing proper calibration,service and maintenance.1.3 This guide does not attempt to add
4、ress maintenance orservice procedures related to the gauge.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues
5、from the two systems may result in non-conformancewith the standard.1.5 This guide does not purport to address all of the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this guide to establish appropriate safety,andhealth practices and determine the applicabilit
6、y of regulatorylimitations prior to use.1.6 This guide offers an organized collection of informationor a series of options and does not recommend a specificcourse of action.This document cannot replace education orexperience and should be used in conjunction with professionaljudgment.Not all aspects
7、 of this guide may be applicable in allcircumstances.This ASTM standard is not intended to repre-sent or replace the standard of care by which the adequacy ofa given professional service must be judged,nor should thisdocument be applied without consideration of a projects manyunique aspects.The word
8、“Standard”in the title of thisdocument has been approved through ASTM consensus pro-cess.1.7 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inpractice D6026.1.7.1 The method used to specify how data are collected,calculated,or record
9、ed in this standard is not directly relatedto the accuracy to which the data can be applied in the designor other uses,or both.How one applies the results obtainedusing this standard is beyond its scope.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFlu
10、idsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD6026 Practice for Using Significant Digits in GeotechnicalDataD6938 Test Method for In-Place Density and Water Contentof Soil and Soil-Aggregate
11、by Nuclear Methods(ShallowDepth)3.Terminology3.1 For definitions of common technical terms in thisstandard,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 cinder blocka hollow building block made withconcrete and coal cinders.3.2.2 high density concrete blockssolid
12、 concrete blocksdesigned for areas requiring radiation shielding.3.2.3 safe positionposition of the density source duringthe standardization process of the gauge.3.2.4 shielded calibration bayan enclosed area sur-rounded by walls in order to reduce background radiation to anacceptable level.3.2.5 sh
13、ielded storage bayan enclosed area with sufficientshielding material to maintain and control radiation back-ground in the facility and to reduce influences from storedgauges.1This guide is under the jurisdiction ofASTM Committee D18 on Soil and Rockand is the direct responsibility of Subcommittee D1
14、8.08 on Special and Construc-tion Control Tests.Current edition approved May 1,2015.Published June 2015.Originallyapproved in 2004.Last previous edition approved in 2011 as D701311.DOI:10.1520/D7013_D7013M-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer
15、Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-29
16、59.United States1 3.2.6 unshielded areaan open area within a calibrationfacility where the closest wall is a minimum of 1 m 3 ft fromthe spot in which the gauge is being calibrated.4.Summary of Method4.1 Nuclear moisture density gauges require proper calibra-tion.Since these gauges contain radioactive isotopes,influ-ences from the surroundings and other gauges should becontrolled during the calibration process.This guide providesprocedures to facilities involved in calibration of one or moregaug
