@book{e200479dbb2e4eda9c53114ef11edd05,
title = "On-Site Test of Filters in Nuclear Facilities using Radioactive Sodium Chloride (24Na)-Aerosol and Methyl Iodine (131I)",
abstract = "The nuclear facilities at Ris{\o} 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%.",
keywords = "Ris{\o}-R-532, Ris{\o}-R-532(EN)",
author = "Heidam, {N. Z.} and Hansen, {K. A.} and J. Fenger and H. Flyger and Jensen, {Per Hedemann} and P. Jensen",
year = "1986",
language = "English",
isbn = "87-550-1184-5",
series = "Denmark. Forskningscenter Risoe. Risoe-R",
number = "532",
publisher = "Ris{\o} National Laboratory",
}