THERMOCOUPLE DESIGN AND TEST PROGRAM FOR REACTOR PROJECTS
Tests were made to determine the stability of swaged, 0.250 inch OD Inconel-sheathed, Chromel P-Alumel thermocouple material with MgO insulation at 1100 to 1800 deg F under conditions where the temperatures were static, slowly cycled, and rapidly cycled. All tests were conducted for a minimum of 3000 hours. A reliable method for the fabrication of the closure weld using Heliarc was developed. The effects of bending, welding, and brazing on the sheath were also investigated with a special traveling-gradient furnace. Comparison tests on a substitute thermocouple system employing 0.250 inch OD Inconel tubing as the protection tube were also made. Various types of thermocouple wires including Chromel P-Alumel were investigated. A Chromel P-Alumel system using short wells made from:1/4 inch and 3/8 inch schedule 40 Inconel pipe was designed and tested under similar conditions. (auth)
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- NSA Number:
- NSA-13-011783
- OSTI ID:
- 4274124
- Report Number(s):
- ORNL-2686
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-59
- Country of Publication:
- United States
- Language:
- English
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