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A Low Level Radioactivity Monitor for Aqueous Waste

Abstract

A system is described for continuous monitoring of very low levels of radioactivity in waste water containing typically 3.5 g/l dissolved solids. Spray evaporation of the water enables the dissolved solids to be recovered in the form of an aerosol and collected on a filter tape where the radioactivity is measured by a radiation detector. The advantage of this method compared with a direct measurement is that the attenuating effect of the water is removed and thus greater sensitivity is obtained. Compensation for background and any contamination is achieved by feeding distilled water to the aerosol generator every alternate sampling period and recording the count difference between two successive sampling periods . A printed record of the totalised count difference is obtained once per hour during the integration time of one month. For {beta} radioactivity the minimum values of specific activity measurable extend from 1 x 10{sup -6} Ci/m{sup 3} to 6 x 10{sup -8} Ci/m depending on the B end-point energy in the range 167 KeV to 2.26 MeV. The estimated minimum measurable specific activity is 6 x 10{sup -8} Ci/m{sup 3}.
Authors:
Publication Date:
Apr 15, 1968
Product Type:
Technical Report
Report Number:
AE-317
Resource Relation:
Other Information: 4 refs., 11 figs., 3 tabs.
Subject:
61 RADIATION PROTECTION AND DOSIMETRY; RADIATION MONITORING; LIQUID WASTES; LOW-LEVEL RADIOACTIVE WASTES; WASTE WATER; EVAPORATION; SENSITIVITY; SAMPLING
OSTI ID:
20956279
Research Organizations:
AB Atomenergi, Nykoeping (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
TRN: SE0708713
Availability:
Commercial reproduction prohibited; OSTI as DE20956279
Submitting Site:
SWDN
Size:
40 pages
Announcement Date:
Dec 29, 2007

Citation Formats

Quirk, E J.M. A Low Level Radioactivity Monitor for Aqueous Waste. Sweden: N. p., 1968. Web.
Quirk, E J.M. A Low Level Radioactivity Monitor for Aqueous Waste. Sweden.
Quirk, E J.M. 1968. "A Low Level Radioactivity Monitor for Aqueous Waste." Sweden.
@misc{etde_20956279,
title = {A Low Level Radioactivity Monitor for Aqueous Waste}
author = {Quirk, E J.M.}
abstractNote = {A system is described for continuous monitoring of very low levels of radioactivity in waste water containing typically 3.5 g/l dissolved solids. Spray evaporation of the water enables the dissolved solids to be recovered in the form of an aerosol and collected on a filter tape where the radioactivity is measured by a radiation detector. The advantage of this method compared with a direct measurement is that the attenuating effect of the water is removed and thus greater sensitivity is obtained. Compensation for background and any contamination is achieved by feeding distilled water to the aerosol generator every alternate sampling period and recording the count difference between two successive sampling periods . A printed record of the totalised count difference is obtained once per hour during the integration time of one month. For {beta} radioactivity the minimum values of specific activity measurable extend from 1 x 10{sup -6} Ci/m{sup 3} to 6 x 10{sup -8} Ci/m depending on the B end-point energy in the range 167 KeV to 2.26 MeV. The estimated minimum measurable specific activity is 6 x 10{sup -8} Ci/m{sup 3}.}
place = {Sweden}
year = {1968}
month = {Apr}
}