Embedded Zircaloy-sheathed cladding thermocouples. [BWR; PWR]
Zircaloy-sheathed Type-K thermocouples, fabricated to a diameter of 0.61 mm and flattened to a thickness of 0.43 mm are described. These instruments are embedded on the surface of electrically-heated fuel rod simulators and used to obtain data for a program intended to characterize the perturbing effect of surface-mounted fuel rod cladding surface thermocouples. Differences between drawn and swaged thermocouples, which led to the drawing technique used in fabrication, are discussed, and the method of attachment of the flattened thermocouples to zircaloy-clad fuel rod simulators is illustrated. Laboratory test results of blowdown/reflood simulation, freeze-point calibration, and response time testing of prototype instruments are presented.
- Research Organization:
- Idaho National Engineering Lab., Idaho Falls (USA)
- DOE Contract Number:
- EY-76-C-07-1570
- OSTI ID:
- 6635056
- Report Number(s):
- NUREG/CR-0271; TREE-1262; TRN: 78-019634
- Country of Publication:
- United States
- Language:
- English
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BWR TYPE REACTORS
FUEL PINS
THERMOCOUPLES
MOCKUP
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FABRICATION
TEST FACILITIES
FUEL ELEMENTS
MEASURING INSTRUMENTS
REACTOR COMPONENTS
REACTORS
STRUCTURAL MODELS
TESTING
WATER COOLED REACTORS
WATER MODERATED REACTORS
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Light-Water Moderated
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210200 - Power Reactors
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