Vietnam: 07 conditions on radiation dose rate for transport

Specifically, according to Article 22 of Circular No. 23/2012/TT-BKHCN of the Ministry of Science and Technology of Vietnam, conditions on radiation dose rate for transport are specified as follows:

1. For excepted packages, the radiation dose rate at near of surface of packages is not more than 5 (mSv/h).

2. For packages of other types, the radiation dose rate on outside of packages is not more than 2 (mSv/h).

3. For equipment or items not be packed, the radiation dose rate at point with distance of 10 (cm) from the outside surface is not more than 0.1 (mSv/h).

4. For LSA or SCO contained in each industry package of IP-1, IP-2 or IP-3 types, the dose rate at point with distance of 3 (m) from LSA or SCO when not be shielded is not more than 10 (mSv/h).

5. For transport of exclusive use:

- By road or railway: The radiation dose rate on outside surface of each package may be more than 2 (mSv/h) but not more than 10 (mSv/h) when meeting conditions of means of transport being protected or covered tightly aiming to during transport, except the persons allowed, no one can enter inside of the part having been covered tightly; reinforce to ensure that packages in fixed position inside of means of transport during course of transport; packages are ensured not to load additionally or unload during the transport time; 

- By airway or waterway: The radiation dose rate on the outside surface of each package is not more than 2 (mSv/h). If being more than this level, it is forced to not be more than 10 (mSv/h) and must be permitted by the Department of Radiation Safety and Nuclear (Ministry of Science and Technology).

6. For means of transport containing packages or containers, the radiation dose rate in any point on sides of vehicles (including above and substructure of vehicles) is not more than 2 (mSv/h) and radiation dose rate at distance of 2 (m) from outside surface of means of transport is not more than 0.1 (mSv/h).

7. At the position of seat for person on means of transport, the radiation dose rate does not exceed 0.02 (mSv/h) in case this person is not shielded from radiation.

View more details at Circular No. 23/2012/TT-BKHCN of the Ministry of Science and Technology of Vietnam, effective from January 21, 2013.

Le Vy

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