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The AdvancedNeutronSource is an experimental facility being developedby Oak RidgeNationalLaboratory. As a new nuclearfissionresearchreactorof unprecedentedflux,the AdvancedNeutron SourceReactorwill providethe most intense steady-statebeamsof neutronsin the world.The high heat fluxes generatedin the reactor[303 MW(t)with an averagepowerdensity of 4.5 MW/L]will be accommodatedby a flowof heavywater throughthe core at highvelocities. In supportof this experimental and analyticaleffort, a reliable,highlyaccurate, and uniformsource of thermodynamicand transportpropertycorrelationsfor saturated light and heavywaterwere developed.In orderto attain high accuracyin the correlations,the rangeof thesecorrelationswas limitedto the proposedAdvancedNeutron SourceReactor's nominaloperatingconditions.The temperatureand corresponding saturationpressurerangesused for fightwaterwere 20-300"C and 0.0025-8.5 MPa, respectively, while those for heavywaterwere S0-2S0°C and0.012-3.9 MPa. Deviationsbetween the correlation predictionsand data fromthe varioussourcesdid not exc_eed1.0%. Lightwater vapordensitywas the only exception,with an error of 1.76%.The physicalpropertypackageconsistsof analytical correlations,SAS codes, and FORTRANsubroutinesincorporating these correlations,as well as an interactive, easy-to-useprogram entitled QuikProp.