TABLE B.25 OBSERVED BETA-DECAY RATES Beta counting samples, supported and covered by 0.80 mg/cm’of pliofilm, were prepared on the YAG 40 from aliquots of SIC tray stock solution. Measurements initiated there were usually continued on Site Elmer, and terminated at NRDL. When stock solution activity permitted, a portion was shipped to NRDL as soon as possible, allowing simultaneous field and NRDL decay measurements to be obtained. Nominally identical continuous-flow proportional detectors were installed at all three locations, and small response differences were normalized by Cs'*" reference standards. No scattering or absorption corrections have been madeto the observed counts. Counter Age Activity Counter Age Activity Location Location counts/sec counts/sec hr 10‘ fissions hr 104 fissions Shot Flathead, YAG 40 Sample 127.4 24.0 " 99.42 49.8 49.97 19.5 21.7 27.9 31.1 34.1 36.6 41.1 45.0 Site Elmer 3473/8, 3.09 x 108 fission, 16.4 54.1 57.9 62.0 65.6 69.6 73.8 15.5 78.8 85.0 90.1 96.5 103.7 109.3 99.42 x 1074 Shelf l Site Elmer 22.83 136.6 17.84 194.8 11.49 123.8 130.9 80.06 72.70 67.77 63.35 57.69 53.26 44.22 40.97 38.68 36.47 34.38 34.21 32.87 30.66 29.26 27.90 26.24 24.19 112.3 153.4 161.5 175.0 194.2 224.1 247.8 NRDL x07! 215 261 333 429 501 598 723 891 1,034 1,223 1,417 1,582 20.07 18.66 x107 15.33 14.69 13.02 11.49 9.412 8.339 10.18 7.718 5.389 3.586 2.875 2.226 1.692 1.226 0.9812 0.7773 0.5916 0.5194 x 1074 Shot Navajo, Sample P-3753/8 #2, 7.2410" fission, Shelf 3. YAG 40 12.62 15.58 18.24 20.33 23.76 26.90 29.78 34.51 38.0 47.9 7.428 =< 107? 5.801 4.933 4.386 3.701 3.276 2.950 2.495 2.262 1,748 Site Elmer 67.8 1.157 x 1073 87.0 89.9 99.0 8.640 x 1074 8.262 7.363 YAG 40 122.9 150.0 310.6 226.1 278.5 NRDL 478 74.8 574 647 593 742 814 361 912 NRDL 984 1,030 1,080 1,151 1,198 1,246 1,342 1,450 1,485 1,534 4.196 x 1075 3.906 3.731 3.223 3.269 3.128 2.620 2.647 2.477 2.373 1,780 2.040 5.691 x 107 4.448 3.736 2.597 1.973 2,014 2,164 2,374 2,541 2,666 2,834 3,266 3,500 3,914 1.710 1.535 1.425 1,293 1.252 1.077 9.346 x 107 8.678 7.413 1.011 x 1074 4,320 8.308 5,930 6,580 6,740 8,230 8,640 4.857 4.005 3.752 3.453 3.039 2.440 1.027 1,850 1.937 x 1078 6.878 4,750 5,330 6436 5.904 5.359 4.968 4.733 257 1.883 5-617