Ask X3What does 49 CFR 173.468 (Test for LSA-III material) require?
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According to 49 CFR 173.468, LSA-III Class 7 (radioactive) material must meet a specific immersion test requirement. Any differences between the actual material to be transported and the tested specimen must be accounted for to ensure the requirements are met.
To perform this test:
1. Use a test specimen representing at least the entire contents of the package.
2. Immerse the specimen in water at ambient temperature for 7 days.
3. Ensure the water volume is enough so that the unabsorbed and unreacted water remaining at the end of the 7 days is at least 10% of the specimen's volume.
4. Use water with an initial pH between 6 and 8, and a maximum conductivity of 10 micromho/cm at 20 °C (68 °F).
5. Measure the total activity of the free water after the 7-day immersion; it must not exceed $0.1 \text{ A}_2$.