Device for detecting and monitoring perforation of the bottom he

Induced nuclear reactions: processes – systems – and elements – Testing – sensing – measuring – or detecting a fission reactor... – Temperature or pressure measurement

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376249, 376280, 136202, 136223, 136224, 136225, 136228, 136230, 374179, G21C 1700, G21C 9016, H01L 3502

Patent

active

057128863

ABSTRACT:
The detection device includes at least one thermocouple (10) arranged aligned with the bottom head of the vessel of the nuclear reactor, having a first branch (9) made of a first metallic material and at least one second branch (11) made of a second metallic material, different from the first material, welded to a point on the first branch constituting a hot junction of the thermocouple (10). The first branch (9) of the thermocouple has the form of an elongate hollow section. The device furthermore includes means for analyzing the measurements taken by the thermocouples (10).

REFERENCES:
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patent: 4385197 (1983-05-01), Schwagerman
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patent: 4764336 (1988-08-01), Aubert et al.
patent: 5192132 (1993-03-01), Pelensky
patent: 5347556 (1994-09-01), McDonald et al.
Barbet et al, "A New Advanced Fixed In-core Instrumentation for a PWR Reactor", Nuclear Instruments and Methods, Jan. 1981, pp. 377-386.

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