TABLE IV-5 _ ESTIMATED UNWEATHERED ACTIVITY ON SURFACE AND EXPOSURE RATE AT ONE METER,RONGELAP ISLAND H+0.5 Day Nuclide Nuc lide $-35 Ca-45 Ge-75 Ge-77 As-77 As-78 8-35 Ca-45 zr-95 zr-95 Zr-95 zr-95 Se~-81 Zr-95 Se-77m Se-81m L£? Reference Activity Per Unit Area, H+0.5 Day Exposure Ci Km~2 Rate, R h7! 5.0x109 1.8x100 4.9x109 9.0x109 1.5x10! 5.7x101 Zr-95 4.7x1072 Zr-95 1.3x1071 1.9x1071 : H+26 Day Activity Per Unit Area, H+26 Day Exposure Ci Km72 Rate, R h7! 2.5x10712 2.3x1076 — 1.9x1074 1.9x1076 1.2x1073 4.0x109 1.7x101! - 2.3x107!12 - 2.6x1076 - 6.71078 2.6x1078 - - - - - Br-82 Br-83 Br-84 Kr-83m Kr-85m Kr-87 Kr-88 Rb-86 Rb-88 Rb-89 Sr-89 Sr-90 Sr-91 Sr-92 Zr-95 Zr-95 Zr-95 Zr-95 Zr-95 Zr-95 2r-95 Zr-95 Y-91 Sr-89 Sr-89 Sr-90 Y-91 Y-91 2.8x1072 1.8x103 4.6x1072 5.0x104 7.9x103 4.1x102 8.9x103 5.7x1073 1.7x104 3.9x1079 1.5x102 1.0x109 5.7x104 2.0x104 1.3x1076 2.5x1074 1.3x1076 3.0x1072 2.7x1072 5.3x1073 2.7x1071 9.2x1079 1.8x107! 1.4x10713 3.8x107/7 7.1x1071 4.6x107! ~ 1.0x102 1.0x10° ~ 2.41077 - Y-90 Y-91 Y-91m Y-92 Y~93 zr-95 Y-90 Y-91 Y-91 Y-91 Y-91 Zr-95 1.4x1071 6.6x102 3.4104 8.4x104 7.0x104 6.8x102 3.7x10711 3.71075 3.4x107! 3.8x10 1.1x107! 9.6x1073 1.0x109 6.6x102 5.2102 2.5x10710 3.7x1075 7.2x1073 Y-89m Sr-89 1.4x1073 2.4x1078 - -