Accession Number:

AD0601267

Title:

MECHANICAL RELIABILITY AND THERMOELECTRICAL STABILITY OF NOBLE-METAL THERMOCOUPLES AT 2600F TEMPERATURE AND DOSE RATES UP TO 10 TO 20 POWER NVT.

Descriptive Note:

Corporate Author:

SYSTEMS ENGINEERING GROUP WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

• Dallman,Alfred C.

Report Date:

1964-04-01

Pagination or Media Count:

38.0

Abstract:

Reactor tests during the test program demonstrated that the following were accomplished 1Alumina Flame spray-coating of sheath-type noble-metal thermocouples prevented excessive loss of the noble-metal sheath and sensor wire by vaporization and redeposition on cooler surfaces in reactor tests at operating temperatures of 2500F to 2600F 2The use of an alumina-coated, noble-metal bare-wire thermocouple Span thermocouple employing a controlled, maximum, feasible separation between sensor wire andor an alumina-coated thermocouple constructed of two one-conductor coaxial, sheathed thermoelements Duax thermocouple insured that temperature information, which will not be affected by significant decalibration, can be obtained for a period of 1000 hours at a test temperature of 2600F. Author

Descriptors:

• *THERMOCOUPLES
• PLATINUM ALLOYS
• RHODIUM ALLOYS
• CALIBRATION
• STABILITY
• FLAME SPRAYING
• NUCLEAR REACTORS
• OXIDES
• DAMAGE
• RADIATION EFFECTS
• THERMOELECTRICITY
• NUCLEAR PARTICLES
• DOSE RATE
• CERAMIC COATINGS
• ALUMINUM COMPOUNDS
• CERAMIC MATERIALS
• THERMAL INSULATION
• HIGH TEMPERATURE
• SCIENTIFIC RESEARCH
• REACTOR FUEL ELEMENTS

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE