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<br />TALLE I <br />ACCEPTABLE SURFACE CONTAMINATION LEVELS <br />NUCLIllESa AVERAGEb c f p4ViIMUhIb d f RF~KOVABLEb o f <br />Alpha emissions from <br />U-nat, U-235, U-238, 5,000 dpm 15,000 dpm ' 1,000 dpm <br />and associated decay per per per <br />products 100 cm2 100 cm2 100 cm2 <br />Alpha emissions from <br />Transuranics, 100 dom 300 dpm 20 dpm <br />Ra-226, Ra-228 per per per <br />Th-230, Th-228, Pa-231, 100 cm-' 100 cm2 1GU cm2 <br />Alpha emissions from <br />Th-nat, Th-232, Sr-90 1,000 dpm 3,000 dpm 200 dpm <br />Ra-223, Ra-224, U-232, per per per <br /> 100 cm2 100 cm2 100 cm2 <br />Beta-gamma emitters <br />(nuclides with decay 5,000 dpm 15,G00 dpm 1,000 dpm <br />modes other than alpha per per per <br />emission or spontaneous 100 cm2 100 cm2 100 cm2 <br />fission) except Sc-90 and <br />others noted above. <br />a lJhere surface contamination by both alpha and beta/gamma-emitting nuclides <br />exists, the limits established for alpha and beta/gamma-emitting nuclides <br />should apply independently. - <br />b As used in this table, dpm (disintegrations per minute) means the rate of <br />emission by radioactive material as determined by correcting the counts <br />per minute observed by an appropriate detector for background, efficiency, <br />and geometric factors associated with the instrumentation. <br />-30- <br /> <br />