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Standard Test Method for Determination of Radioactive Iron in Water (Includes all amendments And changes 5/4/2022).
Automatische name übersetzung:
Standard Test Methode zur Bestimmung der radioaktiven Eisen in Wasser
NORM herausgegeben am 1.1.2016
Bezeichnung normen: ASTM D4922-09(2016)e1
Anmerkung: UNGÜLTIG
Ausgabedatum normen: 1.1.2016
SKU: NS-625234
Zahl der Seiten: 7
Gewicht ca.: 21 g (0.05 Pfund)
Land: Amerikanische technische Norm
Kategorie: Technische Normen ASTM
Examination of water for chemical substancesExamination of physical properties of water
Keywords:
anion exchange, 55Fe, liquid scintillation counting, radioactive iron, radioactivity,, ICS Number Code 13.060.50 (Examination of water for chemical substances),13.060.60 (Examination of water for physical properties)
Significance and Use | ||||||||||||||
5.1 Fe-55 is formed in reactor coolant systems of nuclear reactors by activation of stable iron. The 55Fe is not completely removed by waste processing systems and some is released to the environment by means of normal waste liquid discharges. Power plants are required to monitor these discharges for 55Fe as well as other radionuclides. 5.2 This technique effectively removes other activation and fission products such as isotopes of iodine, zinc, manganese, cobalt, and cesium by the addition of hold-back carriers and an anion exchange technique. The fission products (zirconium-95 and niobium-95) are selectively eluted with hydrochloric-hydrofluoric acid washes. The iron is finally separated from Zn+2 by precipitation of FePO1.1 This test method covers the determination of 55Fe in the presence of 59Fe by liquid scintillation counting. The a-priori minimum detectable concentration for this test method is 7.4 Bq/L.2 1.2 This test method was developed principally for the quantitative determination of 55Fe. However, after proper calibration of the liquid scintillation counter with reference standards of each nuclide, 59Fe may also be quantified. 1.3 This test method was used successfully with Type III reagent water conforming to Specification D1193. It is the responsibility of the user to ensure the validity of this test method for waters of untested matrices. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For a specific hazard statement, see Section 9. |
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2. Referenced Documents | ||||||||||||||
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