Method of detecting leakage of reactor core components of liquid

Details Method of detecting leakage of reactor core components of liquid Method of detecting leakage of reactor core components of liquid

1975-10-22

1977-07-05

Engle, Samuel W.

176 86R, G21C 1704

Patent

active

040338134

ABSTRACT:
A method of detecting the failure of a sealed non-fueled core component of a liquid-metal cooled fast reactor having an inert cover gas. A gas mixture is incorporated in the component which includes Xenon-124; under neutron irradiation, Xenon-124 is converted to radioactive Xenon-125. The cover gas is scanned by a radiation detector. The occurrence of 188 Kev gamma radiation and/or other identifying gamma radiation-energy level indicates the presence of Xenon-125 and therefore leakage of a component. Similarly, Xe-126, which transmutes to Xe-127 and Kr-84, which produces Kr-85.sup.m can be used for detection of leakage. Different components are charged with mixtures including different ratios of isotopes other than Xenon-124. On detection of the identifying radiation, the cover gas is subjected to mass spectroscopic analysis to locate the leaking component.

REFERENCES:
patent: 3157580 (1964-11-01), Williams
patent: 3663363 (1972-05-01), Crouthamel et al.
IDO-16880-2, TID-4500 (31st Ed.), (Aug. 1964), Scintillation Spectrometry-Gamma Ray Spectrum Catalogue Plate 54-125-1.
Nuclear Technology (vol. 26, Aug. 1975), Strand et al., pp. 472-479.
Nuclear Technology, (vol. 24, Nov. 1974), McCormick et al., pp. 149-155.
S5699 0302S, 3/75, Brunsow.
Trans. Am. Nucl. Soc. (15,462-15,463, 1972), Schenter et al.
Trans. Am. Nucl. Soc. (15,950-15,951, 1972), Boulette et al.

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