Singapore legislation
Regulation 50
of Radiation Protection (Transport of Radioactive Materials) Regulations
Regulation 50
Requirements for Type C packages
Subregulation 1
The design of Type C package shall, in addition to meeting the requirements of regulations 42, 43 and 47(2) to (15) except as specified in regulation 47(14)(a), meet the requirements of paragraphs (2) to (6) and regulation 48(3) to (6) and (12) to (18).
Subregulation 2
A Type C package shall be capable of meeting the assessment criteria prescribed for tests in regulation 48(2), (8) and (14) after burial in an environment defined by a thermal conductivity of 0.33 W/(m.K) and a temperature of 38°C in the steady state. Initial conditions for the assessment shall assume that any thermal insulation of the package remains intact, the package is at the maximum normal operating pressure and the ambient temperature is 38°C.
Subregulation 3
A type C package shall be so designed that, if it were at the maximum normal operating pressure and subjected to —
the tests specified in paragraph 5 of Section E of the Fourth Schedule, it would restrict the loss of radioactive contents to not more than 10-6A 2 per hour; and
the test sequences in regulation 10(1) of Section E of the Fourth Schedule it would meet the following requirements:
retain sufficient shielding to ensure that the radiation level at 1 m from the surface of the package would not exceed 10 mSv/h with the maximum radioactive contents which the package is designed to contain; and
restrict the accumulated loss of radioactive contents in a period of one week to not more than 10A2 for krypton-85 and not more than A2 for all other radionuclides.
Subregulation 4
Where mixtures of different radionuclides are present, the provisions of paragraphs 2, 3 and 4 of Section B of the Second Schedule shall apply except that for krypton-85 an effective A2 value equal to 10A2 may be used.
Subregulation 5
For the purposes of paragraph (3)(a), the limits of non-fixed contamination on external surfaces shall be taken into account.
Subregulation 6
A Type C package shall be so designed that there will be no rupture of the containment system following performance of the enhanced water immersion test specified in paragraph 8 of Section E of the Fourth Schedule.