A NEEDLE-VALVE TYPE OF VARIABLE LEAK FOR URANIUM HEXAFLUORIDE MASS SPECTROMETERS

Technical Report · Thu Sep 18 04:00:00 EDT 1952

OSTI ID:4166327

Babelay, E F; Smith, L A

A mass spectrometer sample inlet leak was developed from a standard needle valve. The valve is equipped with a wedge and lever system which permits control of the needle position within one ten-thousandth of an inch. The leak proved particularly suitable for use in the isotopic analysis of uranium hexafluoride. (auth) A survey was conducted of mass flowmeters such as volumetric meters with automatic temperatare-dependent density compensation. transverse momentum-type flowmeters, and other types of flowmeters which can be adapted to the measurement of mass flow. It was concluded that volumetric meters with density compensation are inadequate for non-uniform mass flow while transverse momentum-type flowmeters are well suited for such measurements. The more exotic devices require further development. The types of flowmeters considered sufficiently accurate to warrant further investigation are listed, and a detailed report of the calibration tecbniques used for these is included. (J.R.D.)

• Research Organization: Carbide and Carbon Chemicals Co. K-25 Plant, Oak Ridge, Tenn.
• DOE Contract Number: W-7405-ENG-26
• NSA Number: NSA-14-015763
• OSTI ID: 4166327
• Report Number(s): K-935
• Country of Publication: United States
• Language: English

Related Subjects

CONTROL
ENGINEERING AND EQUIPMENT
LEAKS
MASS SPECTROMETERS
SAMPLING
STANDARDS
URANIUM HEXAFLUORIDE
VALVES