Corrosion measurement with secondary temperature compensation
Monitoring of corrosion
Method for measuring damage to structural components
Method for calculating crack lengths of conductive sensors
Corrosion-erosion trend monitoring and diagnostic system Patent #: 4935195
ApplicationNo. 754099 filed on 09/03/1991
US Classes:376/245, TESTING, SENSING, MEASURING, OR DETECTING A FISSION REACTOR CONDITION204/404, Corrosion205/776.5, Of coating, coated substrate, or imbedded object324/700, Including corrosion or erosion376/249, Vessel monitoring or inspection376/305, Corrosion or damage prevention422/53, Corrosion tester436/6Corrosion resistance or power
ExaminersPrimary: Hunt, Brooks H.
Assistant: Carroll, Chrisman D.
Attorney, Agent or Firm
International ClassG21C 017/00
AbstractAn apparatus and method for monitoring corrosion to members within the core of a nuclear reactor, particularly fuel rod cladding. A sensor means is submerged inside the core of a nuclear reactor near the member or fuel rods. The sensor means is comprised of a generally cylindrical section having an outer surface that is subject to corrosion and radiation, and has a cross-sectional area A1. The sensor means additionally has a reference section subjected to radiation but not to corrosion, and having a cross-sectional area A2. At least one pair of first probes, separated by a length L1, is placed in electrical contact with the cylindrical section. At least one pair of second probes separated by a length L2, is placed in electrical contact with the reference section. A current is passed throughout the sensor means to produce a potential gradient in the cylindrical section and reference section. The change in potential in the reference section, and the cylindrical section is measured and used to calculate the subsequent cross-sectional area in the cylindrical section between the first probes. Preferably, the cylindrical section and reference section are made from the same material as the member.
Field of SearchTESTING, SENSING, MEASURING, OR DETECTING A FISSION REACTOR CONDITION
Temperature or pressure measurement
Vessel monitoring or inspection
Corrosion or damage prevention
Including corrosion or erosion
Which includes current and voltage electrodes
Corrosion resistance or power