- 39 -
2) Assure that the source is secured in the proper shielded position in the Model 989 exposure device and the Model
989 is assembled within the Model 98229 transport package as required by the Type A approval. Perform a pre-
shipment inspection as described under the “Type A Transport Package” section of this manual, and verify the
package meets all applicable requirements described in the Type A approval.
3) The transport case padlock serves as the tamper indicator for this package. Ensure the padlock is attached and is
secured after installation of the Model 989 exposure device in the transport case. [49 CFR 173.412(a)]
4) If the shipping package is to be packaged inside a crate or other outer packaging, the outer packaging must be strong
enough to withstand the normal conditions of transport, and must not reduce the safety of the package. The shipping
package must be placed within the outer package with sufficient blocking to prevent shifting during transportation.
[49 CFR 173.448].
5) Survey the entire exterior surfaces of the package and assure that the maximum radiation level does not
exceed 2 mSv/hr (200 mRem/hr). Survey at 1 meter from all sides of the exterior surfaces of the package and assure
that the maximum radiation level does not exceed 0.1 mSv/hr (10 mRem/hr). Determine the proper shipping labels
to be applied to the package using the criteria of Table 1. [49 CFR172.403].
Table 1
Maximum Radiation Level
at Surface
Maximum Radiation Level
at 1 Meter
White I
0.5 mRem/hr
(0.005 mSv/hr)
0 mRem/hr
(0.00 mSv/hr)
Yellow II
50 mRem/hr
(0.5 mSv/hr)
1.0 mRem/hr
(0.01 mSv/hr)
Yellow III
200 mRem/hr
(2 mSv/hr)
10 mRem/hr
(0.1 mSv/hr)
For a package, both the transport index (TI) and the surface radiation level conditions shall be taken into
account in determining which is the appropriate category of radioactive material label. Where the TI
satisfies the condition for one category but the surface radiation level satisfies the condition for a different
category, the package shall be assigned to the higher category of the two. For this purpose, category White-I
shall be regarded as the lowest category.
The TI is the maximum radiation level measured in mRem/hr at a distance of 1 m from the external surfaces
of the package. When recording the TI, the dose rate units of mRem/hr are not listed, for example a reading
of 20 µSv/hr (2 mRem/hr) would indicate a TI = 2.0. (Note that the TI is rounded to the nearest tenth value.)
To Next Page
Loading...