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Title

ASSESSMENT OF 137Cs TO 90Sr RATIO IN SELECTED SOILS AROUND IDAHO NATIONAL LABORATORY

Organization

Department: Nuclear Eng'g & Health Physics

University: Idaho State University College: Science & Engineering Department: Nuclear Eng'g & Health Physics 23

Document Attachments

Resource	Length	Width	Thickness
Paper	0	0	0

Specimen Elements

City

Pocatello

Coverage

Unknown to Unknown

Creator

Johnson Aina

Publisher

Idaho State University

Type

Thesis

Is Complete

No

Date Published

2/29/2024

Archive

digital

City: Pocatello

Degree

Master

Document Attachments

Abstracts

Fission products such as 90Sr and 137Cs present in the environment can be identified by environmental monitoring programs. To unequivocally quantify the activity of 90Sr, it is necessary to chemically separate the 90Sr to prevent interference from higher and lower energy peaks. This study aims to evaluate methods sufficiently sensitive for the detection of global fallout signs in soil samples. The activity of 137Cs was determined using gamma spectrometry system. Extraction chromatographic isolation of 90Sr on Sr resin was employed on the soil samples, and the activity of 90Sr was determined by triple-to-double coincidence ratio (TDCR) counting method by Hidex 300 SL and a 90Sr efficiency standard ASTM method. All the measured values for 137Cs concentration were less than the recommended federal screening limit for surface soil. The values observed for 90Sr concentration in the soil samples for the ASTM and TDCR methods showed good comparisons.