An improved delayed neutron fission product monitor
Improved delayed neutron fission product monitor for operation in reactor coolant system
Heckelman, J. D.↗
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Feasibility of an on-line fission-gas-leak detection system
Calculations were made to determine if a cladding failure could be detected in a 100-kW zirconium hydride reactor primary system by monitoring the highly radioactive NaK coolant for the presence of I-131. The system is to be completely sealed. A leak of 0.01 percent from a single fuel pin was postulated. The 0.364-MeV gamma of I-131 could be monitored on an almost continuous basis, while its presence could be varified by using a longer counting time for the 0.638-MeV gamma. A lithium-drifted germanium detector would eliminate radioactive corrosion product interference that could occur with a sodium iodide scintillation detector.
Lustig, P. H.↗