ECCENTRIC ROD BURNOUT AT 1000 lbf/in$sup 2$ WITH NET STEAM GENERATION

Journal Article · Sun Jul 01 04:00:00 EDT 1962 · Intern. J. Heat and Mass Transfer

DOI:https://doi.org/10.1016/0017-9310(62)90084-4· OSTI ID:4769124

Levy, S; Polomik, E E; Swan, C L; McKinney, A W

Burnout and pressure-drop tests were performed with an eccentric rod geometry to simulate possibie maldistribution of flow in multirod fuel assemblies of boiling-water reactors. Data are presented for a uniformly heated rod, 0.540 in. in dia. and 81/2 ft long, located within a circular pipe of 0.875 in ID. Test variables include one concentric and three displaced rod geometries, exit steam qualities from 9 to 66% by weight, flow rates from 0.25 to 1.34 x 10/sup 6/ lb/h ft/sup 2/, and system pressures of 1000 lbf/in/sup 2/. Test results are as follows: Burnout heat fluxes with net steam generation are the same for the concentric annulus of 0.1675 in. and the eccentric flow spacing of 0.096 and 0.061 in. Burnout values decrease by 15--36% when the minimum flow annulus is reduced from 0.1675 to 0.033 in. Single-phase pressure-drop tests exhibit a decrease in friction factor as the eccentricity increases. On the other hand, two-phase pressure losses remain relativelv the same at various eccentricities. An analytical model is postulated to determine the degree of transverse mixing in an eccentric geometry. The model based upon subdividing the flow area into two parallel channels indicates that mixing extends well over half of the flow zone. (auth)

• Research Organization: General Electric Co., San Jose, Calif.
• NSA Number: NSA-16-030563
• OSTI ID: 4769124
• Journal Information: Intern. J. Heat and Mass Transfer, Journal Name: Intern. J. Heat and Mass Transfer Vol. Vol: 5
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BOILING
BURNOUT
CONFIGURATION
COOLANT LOOPS
ENGINEERING AND EQUIPMENT
EVAPORATION
FAILURES
FLOW MODELS
FLUID FLOW
FRICTION
FUEL ELEMENTS
HEATING
MASS
MIXING
MOCKUP
PERFORMANCE
PRESSURE
REACTORS
STANDARDS
STEAM
STEAM QUALITY
TESTING
TUBES
VELOCITY
WATER