3.1 General Principles
3.1.1 Workplaces for the operation of open radioactive substances must comply with the relevant regulations in terms of siting, laboratory classification, partitioning within the workplace, layout, radiation shielding, as well as disposal of radioactive "three wastes," operating conditions and radiation monitoring equipment.
3.1.2 If the types of radionuclides planned to be operated, the amount of operation, the mode of operation, and the requirements for protective facilities and equipment exceed the original design specifications, they shall take the lead in submitting to the competent department a radiation protection evaluation report and the protective measures to be taken, and shall be examined and approved by the competent department before proceeding.
3.1.3 In all practical activities of operating open radioactive substances, the three principles of justification of practice, optimization of radiation protection and personal dose equivalent not exceeding the corresponding prescribed limits shall be observed.
3.1.4 Units operating open radioactive materials shall prepare radiation protection evaluation reports in conjunction with the actual situation of the unit. And often evaluation, continuous improvement of protective measures to achieve radiation protection optimization.
3.1.5 Each unit should regularly check the protection effectiveness of the protection measures in the workplace to ensure that they are in good operating condition.
3.1.6 Each unit shall take appropriate and effective protective measures to keep the exposure of all categories of personnel at the lowest possible level reasonably achievable. These measures shall include, at a minimum:
a. Minimizing the use of radionuclides;
b. Using less radiotoxic nuclides instead of more toxic nuclides as far as possible;
c. Seeking to replace open operations with closed operations;
d. Improving the operational proficiency of staff and shortening the operating time;
e. Use effective protective measures;
f. Correctly collect and dispose of radioactive "three wastes";
g. Strengthen safety management to prevent accidents.