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US 4,622,202 AGranted
Reactor in-vessel sensor and core monitoring apparatus
AssigneeHitachi, Ltd.
InventorsIzumi Yamada, Hajime Yamamoto, Mikiyasu Tsunashima
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AssigneeHitachi, Ltd.
InventorsIzumi Yamada, Hajime Yamamoto, Mikiyasu Tsunashima
Estimating the term…
A sensor for monitoring the interior of a sodium-cooled fast breeder reactor comprises a pair of symmetrical magnetic cores, a magnetostrictive or piezoelectric vibrator element bonded to one of the cores, a primary coil and a plurality of secondary coils surrounding the magnetic cores, and a container enclosing the above members. The primary coil applied with an exciting alternating current generates an acoustic signal voltage indicative of sound, if any, originated in the interior of the reactor. The magnetic flux produced by the exciting current is influenced by the temperature and flow velocity of sodium flowing around the sensor, and corresponding voltage signals resulting from the changed magnetic flux are induced in the secondary coils.
A sensor for monitoring the interior of a reactor, comprising a magnetic core member including a magnetostrictive or piezoelectric vibrator element in a portion thereof, a primary coil excited by an alternating current, a plurality of secondary coils electromagnetically coupled to said primary coil, said primary and secondary coils surrounding said magnetic core member, and a casing enclosing therein said magnetic core member and said primary and secondary coils, whereby the temperature and flow velocity of a conductive liquid flowing outside of said casing are sensed, and a sound wave originated in said conductive liquid is received by said primary coil through said vibrator element.
An apparatus for monitoring the interior of a fast breeder reactor comprising:
A sensor for monitoring the interior of the reactor and for determining temperature and flow velocity of a conductive liquid flowing outside a casing, the sensor comprising a casing enclosing therein at least a primary coil excited by an alternating current, at least a secondary coil inductively coupled to said primary coil, and a magnetic core member disposed within said primary and second coils, said magnetic core member having a magnetostrictive or piezoelectric vibrator element attached thereto for transforming a sound wave originated in the conductive liquid into an electric signal induced in said primary coil.
Dependencies are inferred from the claim text.