Special Provision 145

  1. Neutron radiation detectors containing non-pressurized boron trifluoride gas may transported under this shipping name if

    1. the absolute pressure in each detector does not exceed 105 kPa at 20 °C;

    2. the amount of gas does not exceed 13 g per detector;

    3. each detector is manufactured under a quality assurance program;

    4. each detector is of welded metal construction with brazed metal to ceramic feed through assemblies;

    5. each detector has a minimum burst pressure of 1800 kPa, demonstrated by design type qualification testing; and

    6. each detector is tested to a 1 × 10−10 cm3 s−1 leaktightness standard before being filled.

  2. Neutron radiation detectors containing non-pressurized boron trifluoride gas transported as individual components must be offered for transport and transported as follows:

    1. they must be packed in a sealed intermediate plastics liner with sufficient absorbent material to absorb the entire gas contents;

    2. they must be packed in a strong outer means of containment;

    3. in their outer means of containment, they must be capable of withstanding a 1.8 m drop test without any leakage of the gas contained in the detectors; and

    4. the total amount of gas contained in all the detectors in each outer means of containment must not exceed 52 g.

  3. Completed neutron radiation detection systems containing detectors that meet the requirements of subsection (1) must be offered for transport and transported as follows:

    1. the detectors must be housed in a strong sealed outer casing;

    2. the casing must contain sufficient absorbent material to absorb the entire gas contents of the detectors; and

    3. unless the outer casing affords equivalent protection, the completed systems must be packed in a strong outer means of containment capable of withstanding a 1.8 m drop test without any leakage of the gas contained in the detectors.

  4. The shipping document must include the statement “Transported in accordance with special provision 145” or “Transporté conformément à la disposition particulière 145”.

  5. These Regulations, except for Parts 1 and 2, do not apply to

    1. neutron radiation detectors, including those with solder glass joints, containing not more than 1 g of boron trifluoride gas, if they may be transported under this shipping name under subsection (1) and are packed in accordance with subsection (2); and

    2. radiation detection systems containing detectors described in paragraph (a) if the systems are packed in accordance with subsection (3).

Applicable UN Numbers

UN1008