THE INTERNAL INSULATION OF REACTOR PRESSURE TUBES. I. HEAT TRANSFER STUDIES OF LAYERS OF STAGNANT WATER
The use of thernal insulation internal in reactor pressure tubes restricts the tube-wall temoperature and thus permits the consideration of aluminum and magnesium alloys as pressure-tube moaterials. In loop experiments, stagnant water showed promoise as internal insulation. Of the two methods for suppressing corvection which were studied, the subdivision of the water into thin layers proved superior by a iactor of two on an over-all insulation basis to the addition of powder as a stabilizing structure. Experimental results confirmed that the heat transfer across a water-filled horizontal annulus by natural convection is well correlated by the equation of Kraussold. Dimpled-foil spirals are a practical method for subdividing the insulation space into layers sufficiently thin to suppress convection. (auth)
- Research Organization:
- Atomic Energy of Canada Ltd. Chalk River Project, Chalk River, Ont.
- NSA Number:
- NSA-13-002583
- OSTI ID:
- 4293338
- Report Number(s):
- CRCE-800; AECL-687
- Country of Publication:
- Canada
- Language:
- English
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Related Subjects
ALUMINUM ALLOYS
ATOMS
CONVECTION
COOLANT LOOPS
COPPER
CROSS SECTIONS
ELECTRIC CHARGES
ELECTRIC POTENTIAL
ELEMENTS
EMISSION
ENERGY
ENERGY RANGE
EXCITATION
FISSION
FISSION PRODUCTS
HEAT TRANSFER
HIGH TEMPERATURE
MAGNESIUM ALLOYS
MASS
MATERIALS TESTING
MEASURED VALUES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUMERICALS
PIPES
POWDERS
POWER PLANTS
PRESSURE
PROTON BEAMS
REACTORS
RECOILS
SLOWDOWN
STABILITY
TEMPERATURE
THERMAL CONDUCTIVITY
THERMAL DIFFUSION
THERMAL INSULATION
THERMAL STRESSES
TUBES
WATER
ZONES