Other Criteria - std301320000045

DOE-STD-3013-2000

2. Testing During Use

ANSI N14.5, Leakage Tests on Packages for Shipment, specifies that the acceptable

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maximum leak rate is 1 x 10 std. mm /sec (1 x 10 std. cm /sec) of dry air at one

atmosphere [ANSI 1997]. Full penetration weld closures provide the highest integrity

and longest life seals possible. Welds eliminate gaskets, which may degrade and

leak. Mechanical seals using bolts or screwed connections are susceptible to wear,

creep relaxation, seizure, or other mechanical failure.

A.6.2.4

Other Criteria

1. Identification markings are required on all storage containers to facilitate

maintenance of an inventory data base and management of stored materials.

2. The outer container will be placed in and moved through contamination-free areas.

It is important that the container not compromise the contamination-free nature of

those areas. Further, the outer container, when open prior to filling or loading,

should still be capable of placement in, or transport through contamination-free

areas.

The inner container is the innermost barrier to release of radioactive materials. To

ascertain that this barrier has been adequately established, the container is tested to

confirm that it is leak-tight. Removable contamination should be minimized, within

the bounds of ALARA principles, but should not exceed 2000 dpm/100 cm , which is

the threshold between a "contamination area" and a "high contamination area."

In earlier versions of this Standard, there was a requirement that, at the time of

closure of the outer container, the exterior surface of the inner container be

contamination-free, as defined in Appendix D to 10 CFR 835. That requirement has

now been removed and replaced with the requirement stated above. The reasons

for the change are as follows:

Once the outer container has been sealed, there is no way to determine whether

the inner is contaminated or not. On opening the outer, the assumption must be

made that the inner is contaminated. Thus, a contamination-free inner provides

no benefit after the outer is closed.