This paper presents the development, design and results of an electrically heated seven-pin instrumented bundle assembly for LMFBR thermal hydraulic testing. The test assenbly v/as capable of operating in liquid metals at typical temperatures (800°F) and nominal heat fluxes (500,000 Btu/hr-ft^) of LflFBR's and was typical of LflFBR geometry. Wire wraps v;ere used as spacers. Heat transfer data v/as taken over a tenfold range of Peclet number (50 to 500), and the results are presented as local coolant enthalpy rises, local coolant temperatures and local clad temperatures. Even thoug!i considerable forced diversion of the coolant by the wire wraps was evident, significant coolant and clad temperatures gradients did exist across pins of the outer row. A severe hot spot did not exist beneath a v/ire wrap.
The purpose of this report i s t o provide a brief written description of the f a c i l i t i e s existing a t Hanford for research and development i n the f i e l d s of heat transfer and hydraulics. IN!TRODUCTION Within the Hanford Laboratories Operation a large laboratory exists f o r research and development i n the f i e l d s of heat t r a n s f e r and hydraulics. is operated by t h e Thermal Hydraulics Operation t o supply experimental infozmat i o n i n support of the programs concerned with the development of reactor engineering technology a t Hanf'ord. The Laboratory The research and development programs i n progress a r e concerned principally with t h e heat' transfer from nuclear f u e l elements t o water as a coolant. Specific fields of study include heat transfer during boiling, boiling burnout, hydraulic s t a b i l i t y , heat transfer during transient conditions of flow and heat generation, coolant mixing, two-phase pressure drop, and discharge rates under c r i t i c a l flow conditions. Many of the experiments a r e performed a t typical reactor conditions of pressure, f l o w , and temperature, and with test sections fabricated t o actual fuel element dimensions. Where heat transfer is involved, heat generation x i t h i n the t e s t sections i s provided by resistance heating with high amperage, d i r e c t current * L 'rnCLASSIFIED-2-m-65122 < motor generator, direct-current power supply; an Organics Beat Transfer Apparatus, an e l e c t r i c a l analog, a data reducing and calibration f a c i l i t y , and assembly and storage areas The High Pressure Heat Transfer Apparatus is an electlclcally heated f a c i l i t y designed f o r 2500 psig a t 650°F.
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