Apparatus for detecting leakage of liquid sodium

Details Apparatus for detecting leakage of liquid sodium Apparatus for detecting leakage of liquid sodium

1976-09-15

1978-09-05

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

73 405R, 73 491, G08B 2100

Patent

active

041124170

ABSTRACT:
An apparatus for detecting the leakage of liquid sodium includes a cable-like sensor adapted to be secured to a wall of piping or other equipment having sodium on the opposite side of the wall, and the sensor includes a core wire electrically connected to the wall through a leak current detector and a power source. An accidental leakage of the liquid sodium causes the corrosion of a metallic layer and an insulative layer of the sensor by products resulted from a reaction of sodium with water or oxygen in the atmospheric air so as to decrease the resistance between the core wire and the wall. Thus, the leakage is detected as an increase in the leaking electrical current. The apparatus is especially adapted for use in detecting the leakage of liquid sodium from sodium-conveying pipes or equipment in a fast breeder reactor.

REFERENCES:
patent: 3721970 (1973-03-01), Niemoth
patent: 3755801 (1973-08-01), Milo
patent: 3981181 (1976-09-01), Ochiai

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