METHOD AND SYSTEM FOR MEASURING A SPENT FUEL POOL TEMPERATURE AND LIQUID LEVEL WITHOUT EXTERNAL ELECTRICAL POWER
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United States of America Patent
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Mar 13, 2014
app pub date -
Sep 11, 2012
filing date -
Sep 11, 2012
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Abstract
A method and system for measuring a temperature and liquid level of water within a Spent Fuel Pool (SFP) of a Light Water Reactor, without using external electrical power. The method and system may use a string of thermocouples attached to a cable and mounted in the spent fuel pool. The thermocouples supply their own power when heated by water that is exposed to the thermocouples within the spent fuel pool. The thermocouples may measure the temperature in the SFP. By measuring the temperature, the liquid water level of the SFP may be inferred by comparing a difference in temperature measurements of the thermocouples, as thermocouples exposed to ambient air will experience a noticeably different temperature from the thermocouples covered by water. The cable (with the thermocouples on one end) may terminate in a location that is remote from the SFP.
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