Study on nuclear test scheme and test results for safety neutron measurement system in research reactor

Nuclear test of safety class neutron measurement system (NMS) in research reactors (RR) has been recognized key data during commissioning stage. Most of test results hardly tell the difference between test result and commissioning outcome. However, several parameters such as linearity and sensitivity need to pay more attention to the test data even though it is not significant. In particular, taking account for the importance of nuclear test, it will be introduced in this paper to verify how the acceptance criteria was determined, if test methodology was suitable, and what the deviation of the detector's sensitivity influenced whole performance. Thus far, the issue on nuclear test for the NMS in RR has been summarized with field experience and this practical approach was suggested based on test data. The nuclear test finally ended up the circuit modification and retesting, however it sheds on the light this case should be handled with precarious attention factoring in the severity of the linear power signal