A fast method for monitoring I-129 in milk in the surveillance of radioactive waste repositories in the event of accidental releases

Citation
D. Tait et al., A fast method for monitoring I-129 in milk in the surveillance of radioactive waste repositories in the event of accidental releases, KERNTECHNIK, 65(4), 2000, pp. 168-171
Citations number
25
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Nuclear Emgineering
Journal title
KERNTECHNIK
ISSN journal
0932-3902 → ACNP
Volume
65
Issue
4
Year of publication
2000
Pages
168 - 171
Database
ISI
SICI code
0932-3902(200008)65:4<168:AFMFMI>2.0.ZU;2-R
Abstract
The German Guidelines for Monitoring the Emission and Imission from Nuclear Facilities [1] stipulate the monitoring of I-129 in milk produced in the v icinity of nuclear waste repositories when the release of this nuclide is p ossible e. g. lifter a fault or an accident. The monitoring detection limit is 2 Bq I-129 per litre milk. This paper describes a simple radiochemical method for separating I-129 from liquid milk in a form suitable for direct gamma-spectrometry of the characteristic 39.6 keV emission line of I-129 Th e iodine is extracted from the milk with an anion exchange resin, eluted fr om the resin with aqueous sodium hypochlorite, then bound directly from the eluate to a small amount of cuprous sulfide. This is collected on a small filter paper disc, dried and counted with a low level, low energy germanium gamma-spectrometer. After 60 minutes counting of iodine separated from 0.5 litre milk samples the detection limit was about 0.35 Bq/l ie. the require d limit was readily attained.