Fenger, J.

Flyger, H.

Hansen, K. A.

Heidam, N. Z.

Jensen, P.

Jensen, Per Hedemann

The nuclear facilities at Risø National Laboratory are equipped with high-efficiency filters to protect the environment from routine or accidental releases of radioactive material. The filter efficiency must be tested regularly and a method for on-site control is described. It is based on injection of a radioactive sample in the filter duct, followed by sampling before and after the filter. HEPA-filters are tested with a 24NaCl-aerosol and charcoal filters with 131ICH3. Normally samples of 1 mCi areused. Penetrations (1 - efficiency) can be determined with a relative uncertainty of 10-15%

Online Research Database In Technology

On-Site Test of Filters in Nuclear Facilities using Radioactive Sodium Chloride (24Na)-Aerosol and Methyl Iodine (131I)

http://orbit.dtu.dk/ws/files/5692272/0453Fd01.pdf

On-Site Test of Filters in Nuclear Facilities using Radioactive Sodium Chloride (24Na)-Aerosol and Methyl Iodine (131I)

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Online Research Database In Technology