Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Patent
1988-05-18
1990-12-18
Warden, Robert J.
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
7386323, 210263, 210265, 210295, 422 681, 422 81, 422101, 436 38, 436 52, 436177, 436178, 436 6, G01N 3000, B01D 3600
Patent
active
049785060
ABSTRACT:
A corrosion product monitoring system and method are described using a recirculation loop including a sample line, a particulate collection vessel, a recirculating pump, a microporous membrane "cross-flow" filter, and valves to control the flow rate and pressure of a fluid sample taken from the secondary fluid system of a nuclear power plant. The liquid sample is processed at a constant flow rate and temperature. When a relatively short time has elapsed in a trial sample run to stabilize conditions in the sample line, an actual sample run is started by feeding sample into the loop. Non-soluble, particulate concentration increases in the filter and particulate collection vessel as the run progresses. The permeate of soluble contaminants is passed through an ion exchange column to concentrate soluble ions in the sample. The filter is backwashed on a timed cycle by filtered water pressurized by a pump, or gas pressure, by realigning the system valves. A total sample volume is determined by measuring the amount of filtered, deionized water discharged during the actual sample run, based on total weight, total flow or time at a constant discharge rate. A concentration factor can be determined from the total sample volume divided by the initial system volume. A sample of the non-soluble particulates can also be drawn from the particulate collection vessel for analysis. The related method includes the steps of: taking a sample from a fluid system; introducing the sample to a recirculation loop having an initial system volume; separating non-soluble particulates from soluble contaminants; suspending the solid particulates; collecting the solid particulates in a particulate collection vessel; and determining a corrosion concentration factor from the total sample volume divided by the initial system volume.
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Johnston Jill
Warden Robert J.
Westinghouse Electric Corp.
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