Nuclear incident monitor criticality alarm instrument for the Savannah River Site: Technical manual

摘要

The Savannah River Site is a Department of Energy facility which stores, processes, and works with fissionable material at a number of locations. Technical standards and US Department of Energy orders, require these locations to be monitored by criticality alarm systems under certain circumstances. The Savannah River Site calls such instruments Nuclear Incident Monitors or NIMs. The sole purpose of the Nuclear Incident Monitor is to provide an immediate evacuation signal in the case of an accidental criticality in order to minimize personnel exposure to radiation. The new unit is the third generation Nuclear Incident Monitor at the Savannah River Site. This report describes the design of the new NIM and the testing that took place to verify its acceptability.