WATER LEVEL DETECTION SYSTEM AND METHOD

Title:

WATER LEVEL DETECTION SYSTEM AND METHOD

Document Type and Number:

Japanese Patent JP2013104757

Kind Code:

A

Abstract:

To provide a water level detection system which can be additionally installed by small-scaled installation work to existing facilities and has excellent radiation resistance.

According to one embodiment, a water level detection system comprises: a reference gamma ray source 24 which is installed in a water tank 21 in reactor facilities and generates a reference gamma ray; a gamma ray detecting sensor 1 which is disposed at the same height as that of the reference gamma ray source 24 in the vicinity thereof in the water tank 21 and detects gamma rays; a signal processing section 3 to which a gamma ray detecting signal output from the gamma ray detecting sensor 1 is input, performs count processing for defining a detection number of the gamma rays per unit time as a counting rate and outputs the counting rate; a threshold value storage section 5 for storing a threshold value of the counting rate therein beforehand; and a comparison determining section 4 for, in a case where the counting rate output from the signal processing section 3 exceeds the threshold value, determining the gamma ray detecting sensor 1 to be in an exposed state to air from underwater.

Inventors:

NISHIMURA KENTARO
SAKAI HIROTAKA
NORIKI HIDEMITSU
KUBO YOJI

Application Number:

JP2011248075A

Publication Date:

May 30, 2013

Filing Date:

November 11, 2011

Export Citation:

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