A novel permanently magnetised high gradient magnetic filter using assisted capture for fine particles
This paper describes the structure and properties of a novel permanently magnetised magnetic filter for fine friable radioactive material. Previously a filter was described and tested. This filter was designed so that the holes in the filter are left open as capture proceeds which means the pressure drop builds up only slowly. This filter is not suitable for friable composite particles which can be broken by mechanical forces. The structure of magnetic part of the second filter has been changed so as to strongly capture particles composed of fine particles weakly bound together which tend to break when captured. This uses a principle of assisted-capture in which coarse particles aid the capture of the fine fragments. The technique has the unfortunate consequence that the pressure drop across the filter rises faster as capture capture proceeds than the filter described previously. These filters have the following characteristics: (1) No external magnet is required. (2) No external power is required. (3) Small is size and portable. (4) Easily interchangeable. (5) Can be cleaned without demagnetising.
- Publication Date:
- OSTI Identifier:
- Report Number(s):
- NUREG/CP--0141; CONF-940738--
ON: TI95007828; TRN: 95:018810
- Resource Type:
- Technical Report
- Resource Relation:
- Conference: 23. DOE/NRC nuclear air cleaning and treatment conference, Buffalo, NY (United States), 25-28 Jul 1994; Other Information: PBD: Feb 1995; Related Information: Is Part Of Proceedings of the 23rd DOE/NRC nuclear air cleaning conference; First, M.W. [ed.] [Harvard Univ., Boston, MA (United States). Harvard Air Cleaning Lab.]; PB: 820 p.
- Research Org:
- USDOE Assistant Secretary for Environment, Safety, and Health, Washington, DC (United States). Office of Environmental Guidance; Nuclear Regulatory Commission, Washington, DC (United States). Office of Nuclear Regulatory Research; International Society of Nuclear Air Treatment Technologies, Inc., Batavia, OH (United States); Harvard Univ., Boston, MA (United States). Harvard Air Cleaning Lab.
- Country of Publication:
- United States
- 22 NUCLEAR REACTOR TECHNOLOGY; PARTICLES; REMOVAL; MAGNETIC FILTERS; DESIGN; DIAGRAMS; EXPERIMENTAL DATA
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