Sodium leak detection system for liquid metal cooled nuclear rea

Details Sodium leak detection system for liquid metal cooled nuclear rea Sodium leak detection system for liquid metal cooled nuclear rea

1989-04-12

1991-10-22

Lechert, Jr., Stephen J.

Induced nuclear reactions: processes, systems, and elements

Testing, sensing, measuring, or detecting a fission reactor...

Leak detection

376248, G21C 1700

Patent

active

050593838

ABSTRACT:
A light source is projected across the gap between the containment vessel and the reactor vessel. The reflected light is then analyzed with an absorption spectrometer. The presence of any sodium vapor along the optical path results in a change of the optical transmissivity of the media. Since the absorption spectrum of sodium is well known, the light source is chosen such that the sensor is responsive only to the presence of sodium molecules. The optical sensor is designed to be small and require a minimum of amount of change to the reactor containment vessel.

REFERENCES:
patent: 3969077 (1976-07-01), Hill
patent: 4091283 (1978-05-01), Sun
patent: 4117396 (1978-09-01), Berkey et al.
patent: 4380168 (1983-04-01), Ibe
patent: 4886348 (1989-12-01), Schmertz

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