FORCED-FLOW BOILING IN ROD BUNDLES AT HIGH PRESSURE

Technical Report · Sun Sep 01 04:00:00 EDT 1963

OSTI ID:4128555

Matzner, B; Neill, J S

The thermal and hydraulic characteristics of electrically heated 7- and 19-rod bundles cooled by forced flow of water with bulk boiling at 1000 psia were measured. The ranges of the variables investigated were: heat fluxes as high as 550,000 pcu/(hr)(ft/sup 2/), exit steam qualities as high as 59%, mass velocities from 500,000 to 2,000,000 lb/(hr)(ft/sup 2/), and heated lengths of 3 and 6 ft. The power of the test sections was as high as 3.35 megawatts. The sudden deterioration in heat transfer (incipient burnout), as the heat flux or the quality was increased, was detected by thermocouples against the heater wall and by the changes in electrical resistance of the rods. Operation at progressively higher surface temperatures beyond the point of incipient burnout was explored. The effect on heat transfer and pressure drop of spirally wrapped wires, which were used for spacing the rods, was observed. The pressure drops in two-phase flow were correlated. (auth)

• Research Organization: Columbia Univ., New York; Du Pont de Nemours (E.I.); Co., Wilmington, Del.
• NSA Number: NSA-18-003952
• OSTI ID: 4128555
• Report Number(s): DP-857
• Country of Publication: United States
• Language: English

Related Subjects

BOILING
BURNOUT
CONFIGURATION
ELECTRICITY
ENGINEERING
EQUATIONS
FLUID FLOW
HEAT TRANSFER
HEATING
MEASURED VALUES
OPERATION
POWER
PRESSURE
RESISTORS
RODS
SPACERS
STEAM
THERMOCOUPLES
VELOCITY
WATER COOLANT
WIRES