PRELIMINARY DESIGN OF SRE-PEP CORE III VARIABLE ORIFICE | Zendy

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PRELIMINARY DESIGN OF SRE-PEP CORE III VARIABLE ORIFICE

Author(s) -

Robert Noyes

Publication year - 1963

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/4003731

Subject(s) - body orifice , spark plug , orifice plate , pressure drop , materials science , leakage (economics) , sensitivity (control systems) , mechanics , physics , mechanical engineering , engineering , thermodynamics , electronic engineering , macroeconomics , economics

A single, wide-range variable orifice design is developed, which provides a maximum orifice flow area of 2.0 in./sup 2/ and a minimum oriflce flow area of 0.2 in./sup 2/ The design is based on an overall operating core DELTA P of 4.0 psi and provides for a sodium flow range of 2.45 to 10.0 lb/sec. Bypass leakage around the orifice is analyzed and accounted for in the design. It is shown that the use of piston rings is not necesary to reduce this leakage. The orifice plug profile is calculated for constant temperature sensitivity; the maximum average sensitivity being 451 deg F/ in. for a 1.5 in. plug length. Fuel channel pressure drop is recalculated for both special and standard elements using the latest proposed designs. Maximum DELTA P including wide open variable orifice is 3.6 psi. (auth

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