BS IEC 60860-2014 pdf Radiation protection instrumentation一 Warning equipment for criticality accidents

6.6 Overload characteristics 6.6.1 Requirements For radiation doses or dose rates greater than those required to initiate the alarm, the warning subassembly shall be activated and remain so until reset. After the test the equipment shall function normally. Detection subassembly shall be tested to a dose rate of at least 1 kGy-h- 1 during a period of at least 1 min. 6.6.2 Method of test This test shall be performed using a reactor or other appropriate source of radiation. The detection subassembly is exposed to the above dose rate and the alarm signal shall continue until reset. After the test the equipment shall function normally.
7.2 Environmental test with source or injected electrical signal 7.2.1 Requirements The alarm set point shall not vary by more than土10 % due to the environmental changes specified in IEC 62706 from-10 °C to 40 °C. 7.2.2 Method of test The detection equipment should undergo the environmental tests specified in IEC 62706 for installed instrumentation from -10 °C to 40 °C. An appropriate source or an electrical injected signal should be used in order to test that the alarm set point at the temperature extremities shall not vary by more than土10 % compared to the alarm set point at 22。C土2 °C.
8 Mechanical requirements The equipment shall undergo the mechanical tests specified in 1IEC 62706 for installed instrumentation. No false alarm, mechanical damage or loose components shall be allowed. These tests will be done prior to the radiation tests.
9 Electromagnetic requirements The equipment shall undergo the electromagnetic tests specified in IEC 62706 for installed instrumentation. No false alarm shall be allowed. Then, an appropriate source or an injected electric signal shall be used in order to put the equipment in alarm conditions. The audible alarm shall be switched off and only the output signal shall be monitored. Undergo the radio frequency immunity test as specified in IEC 62706 for installed instrumentation and check if there is a substantial decrease of the output signal at some frequency. The equipment shall remain in alarm condition during the whole test. These tests shall be done prior to the radiation tests.