1 and 3

1. Look up the NRC classification system for LLW, as defined in 10 CFR 61.55.4 Classify the following wastes according to the NRC regulations: (a) TRU containing 13.1nCi/g of long-lived alpha-emitters; (b) Paper filter medium containing 26.0Ci/m3 of C14; (c) Activated metal containing 26.0Ci/m3 of C14; (d) Solidified waste containing 53Ci/m3 of tritium. 2. Classify the wastes described in the previous problem according to the scheme outlined in Table 9.1. 3. For LLW containing two or more radionuclides, 10 CFR 61.55 requires the use of the sum of the fractions rule. Explain the rule, and use it to classify wastes containing the following radionuclides: (a) 50Ci/m3 of Sr90 and 22Ci/m3Cs137Ci/m3; (b) 0.01Ci/m3 of Sr90 and 0.55Ci/m3 of Cs137; (c) 0.01Ci/m3 of Sr90 and 0.75Ci/m3 of Cs- 137 ; (d) 0.01Ci/m3 of Sr90 and 0.65Ci/m3 of Cs- 137 ; (e) 68Ci/m3 of Sr90 and 41Ci/m3 of Cs-137; (f) 3750Ci/m3 of Sr90 and 2240Ci/m3 of Cs- 137 ; (g) 3.5Ci/m3 of C14,12.6Ci/m3 of Ni59, and 4.7Ci/m3 of Ni63 in activated metal