Estimation by smearing of the level of tritium surface contamination

Journal Article · Fri Jun 01 04:00:00 EDT 1973 · Hoken Butsuri, v. 8, no. 2, pp. 67-71

DOI:https://doi.org/10.5453/jhps.8.67· OSTI ID:4314706

Kitano, K; Ikezawa, Y; Harada, Y; Kokubu, M; Kajimoto, Y

For the estimation of tritium surface contamination by a smear technique, some experiments have been made on the optimum content of glycerol loaded in the smear paper, the fraction of tritium removed by the paper from the surface contamination (i.e., removal efficiency), the counting efficiency for a 2 pi gas flow counter, and the desorption of tritium from contaminated smear papers. Of the total contamination, 1% and 10% can be removed usirg a 25 w/o glycerol loaded smear paper from a permeable material such as synthetic polymer resin tile and a non-permeable one like stainless steel plate, respectively. The counting efficiency for a tritium smear sample is about 10% for the counter. It is therefore appropriate to assume that the overall counting efficiency in this method (removal efficiency multiplied by counting efficiency) is 0.1% and 1% for the above two materials, respectively. The desorption of tritium is much less from a glycerol loaded smear paper, being only 20% in 40 min, while it is as high as 70% from the non-glycerol loaded one. (auth)

• Research Organization: Japan Atomic Energy Research Inst., Tokai
• NSA Number: NSA-29-029176
• OSTI ID: 4314706
• Journal Information: Hoken Butsuri, v. 8, no. 2, pp. 67-71, Journal Name: Hoken Butsuri, v. 8, no. 2, pp. 67-71; ISSN HOKBA
• Country of Publication: Japan
• Language: Japanese

Related Subjects

*SURFACE CONTAMINATION MONITORS-- EFFICIENCY
*TRITIUM-- RADIATION MONITORING
COUNTING RATES
DESORPTION
FLOW COUNTERS
N40420* --Chemistry--Radiochemistry & Nuclear Chemistry-- Properties of Radioactive Materials
N44300 --Environmental & Earth Sciences--Radioactivity Monitoring & Transport
RADIATION DETECTION
SURFACE CONTAMINATION
SURFACES