Table 7–1

10 CFR 61 WASTE CLASSIFICATION ACTIVITY LIMITS (Ref. 1) (From 10 CFR Part 61.55)

 

Concentration, μCi/cm3

Nuclide

Class A

Class Ba

Class C

Long Lived

 

C-14

0.8

NA

8

C-14 in activated metal

8.0

NA

80

Ni-59 in activated metal

22.0

NA

220

Nb-94 in activated metal

0.02

NA

0.2

Tc-99

0.3

NA

3

I-129

0.008

NA

0.08

Alpha emitting transuranics with half-lives greater than 5 years

10b

NA

100b

Pu-241

350b

NA

3,500b

Cm-242

2,000b

NA

20,000b

Short Lived

 

Total of all nuclides with half-lives less than 5 years

700

(c)

(c)

H-3

40

(c)

(c)

Co-60

700

(c)

(c)

Ni-63

3.5

70

700

Ni-63 in activated metal

35

700

7,000

Sr-90

0.04

150

7,000

Cs-137

1

44

4,600

a. There is no Class B category for waste exceeding the Class A limit for long lived nuclides. Such wastes are automatically Class C or are unacceptable for shallow burial. For waste containing a mixture of nuclides, the sum of the fractions of limits must be less than one with each section (long or short lived) considered separately. The appropriate limits must all be taken from the same column in the table.

b. Units are nanocuries per gram.

c. There are no specific limits for these nuclides in these classes. Practical considerations such as heating effect, external package radiation on shipping, or maximum specific activity determine the maximum concentration for these nuclides.



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