Title:
原子力発電所の蒸気発生器内の部品片の存在を検出する方法
Document Type and Number:
Japanese Patent JP5886413
Kind Code:
B2
Abstract:
A plurality of signal anomalies are identified in a number of tubes in a steam generator. Since the geometry of the steam generator is known, the location of each signal anomaly along each tube is converted into a location within the interior of the steam generator. If a plurality of signal anomalies are at locations within the steam generator that are within a predetermined proximity of one another, such a spatial confluence of signal anomalies is determined to correspond with a loose part situated within the steam generator. Additional methodologies can be employed to confirm the existence of the loose part. Historic tube sheet transition signal data can be retrieved and subtracted from present signals in order to enable the system to ignore the relatively strong eddy current sensor signal of a tube sheet which would mask the relatively weak signal from a loose part at the tube sheet transition.
Inventors:
Le, Ki, Vi
Application Number:
JP2014503654A
Publication Date:
March 16, 2016
Filing Date:
February 06, 2012
Export Citation:
Assignee:
Westinghouse Electric Company LLC
International Classes:
G21C17/003; G21C17/04
Domestic Patent References:
| JP63079058A | ||||
| JP2248895A | ||||
| JP5126980A | ||||
| JP1214797A | ||||
| JP4036621A |
Attorney, Agent or Firm:
Yoshihiro City