Direct Measurement of Nuclear Power Plant Severe Accident Conditions

Aug 7, 2018 | News

One of the lessons learned from the severe accident at Fukushima has been the need for direct measurement of severe accident (SA) conditions. The lack of direct measurement of severe accident conditions increases the complexity of the emergency procedures and the Severe Accident Management Guidelines (SAMGs). Additionally, this puts a burden on scenarios for which nuclear operators have to plan.

Significant cost and time savings and simplification of procedures, especially Severe Accident Management Guidelines are the benefits of the GLSEQ Severe Accident Instrumentation Line (IS-SAIL). Directly measure hydrogen, oxygen, temperature, and pressure before and after a severe accident. These instruments have been tested to 1300F (700C) and 500 Megarads (5 MGy) which exceed the design requirements of all known light water reactors and severe accident requirements.

GLSEQ’s IS-SAIL have been qualified and meet the new Type C instrumentation standards. IS-SAIL are the highest environmental rated instruments. Type C instruments provide primary information to the accident management personnel at the nuclear power plant to indicate the potential for breach or the actual breach of fission product barriers (e.g., fuel cladding, reactor coolant system pressure boundary, and containment pressure boundary).

IS-SAIL Type C instruments provide the most direct indication of the integrity of fission product barriers and provide the capability for monitoring beyond the normal operating range of the plant.

To learn more visit our Hydrogen and Oxygen Monitoring System (HOMS) page or contact Jim Gleason, President of GLSEQ, LLC (