Designation:C776−06(Reapproved2011)StandardSpecificationforSinteredUraniumDioxidePellets1ThisstandardisissuedunderthefixeddesignationC776;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONThisspecificationisintendedtoprovidethenuclearindustrywithageneralspecificationforuraniumdioxidepellets.Itrecognizesthediversityofmanufacturingmethodsbywhichuraniumdioxidepelletsareproducedandthemanyspecialrequirementsforchemicalandphysicalcharacterizationwhichmaybeimposedbytheoperatingconditionstowhichthepelletswillbesubjectedinspecificreactorsystems.Therefore,itisanticipatedthatthepurchasermaysupplementthisspecificationwithadditionalrequirementsforspecificapplications.1.Scope1.1Thisspecificationisforfinishedsintereduraniumdiox-idepellets.Itappliestouraniumdioxidepelletscontaininguraniumofany235Uconcentrationforuseinnuclearreactors.1.2Thisspecificationrecognizesthepresenceofrepro-cesseduraniuminthefuelcycleandconsequentlydefinesisotopiclimitsforuraniumdioxidepelletsmadefromcommer-cialgradeUO2.SuchcommercialgradeUO2isdefinedsothat,regardingfueldesignandmanufacture,theproductisessen-tiallyequivalenttothatmadefromunirradiateduranium.UO2fallingoutsidetheselimitscannotnecessarilyberegardedasequivalentandmaythusneedspecialprovisionsatthefuelfabricationplantorinthefueldesign.1.3Thisspecificationdoesnotinclude(a)provisionsforpreventingcriticalityaccidentsor(b)requirementsforhealthandsafety.Observanceofthisspecificationdoesnotrelievetheuseroftheobligationtobeawareofandconformtoallfederal,state,andlocalregulationspertainingtopossessing,shipping,processing,orusingsourceorspecialnuclearmaterial.Ex-amplesofU.S.GovernmentdocumentsareCodeofFederalRegulations(LatestEdition),Title10,Part50,Title10,Part71,andTitle49,Part173.1.4Thefollowingprecautionarycaveatpertainsonlytothetechn...
