Determining excepted package amounts

["Alan R. Marchand" <radarm@accessnv.com>]

An interesting question. If you have to determine the excepted amount for the A1 or A2 values for excepted packages, what is the excepted package limit for an unlimited quantity? Here are just a few examples


173.435
Table of A1 and A2 values for radionuclides. 
The table of A1 and A2 values for radionuclides is as follows: 


Symbol of 	
atomic number &  Element        A1 (TBq)/A1 (Ci)           A2 (TBq)/A2 (Ci)


I-129		    Iodine(53)      	Unlimited        		Unlimited        
Pd-107            Palladium(46)   	Unlimited        		Unlimited
Re-187            Rhenium(75)	Unlimited        		Unlimited
U-238             Uranium(92)	Unlimited        		Unlimited
U (natural)				Unlimited        		Unlimited
U (enriched) 				Unlimited        		Unlimited 

173.425
Table of activity limits-excepted quantities and articles.
The limits applicable to instruments, articles, and limited quantities subject to exceptions under §§173.421 and 173.424 are set forth in Table 7 as follows:
Table 7.--Activity Limits for Limited Quantities, Instruments, and Articles

Nature of contents    Instruments and articles             Materials package                     			Limits for each			     limits 1
instrument or        Package 		                     			article 1		limits 1
-------------------------------------------------------------------------------
Solids:
Special form            10-2 A1             A1 			10-3 A1
Normal form             10-2 A2             A2 			10-3 A2
Liquids:
Tritiated water:
<0.0037 TBq/liter (0.1 Ci/L)                                37 TBq (1,000 Ci)
0.0037 TBq to 0.037 TBq/L (0.1                              3.7 TBq (100 Ci)
Ci to 1.0 Ci/L)
>0.037 TBq/L (1.0 Ci/L)                                     0.037 TBq (1.0 Ci)
Other Liquids           10-3 A2           10-1 A2             10-4 A2
Gases:
Tritium2            2 x 10-2 A2       2 x 10-1 A2         2 x 10-2 A2
Special form            10-3 A1           10-2 A1             10-3 A1
Other form              10-3 A2           10-2 A2             10-3 A2

1  For mixtures of radionuclides see  173.433(d).
2  These values also apply to tritium in activated luminous paint and tritium adsorbed on solid carriers.

Alan R. Marchand
radarm@accessnv.com