Clearance measurement of metal scraps for nuclear facility at INER in Taiwan

Wei, Hung-Ju; Tsai, Tsung‐Lin; Wang, Jeng-Jong; Chen, Ing-Jane; Wuu, Jyi-Lan; Wang, Tzu-Wen

doi:10.1016/j.apradiso.2009.01.080

Cited by 6 publications

(1 citation statement)

References 3 publications

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“…We wish to note that the de tec tion limit de ter mina tion at 3 B level was con sid ered as ad e quate for the pur pose of our study, i. e. ra dio ac tive waste man agement, and that it has been pre vi ously ap plied in other stud ies as well [9][10][11].…”

Section: Detection Limitmentioning

confidence: 99%

Non-destructive technique to verify clearance of pipes

Savidou¹,

Stamatelatos²

2010

Nucl. Technol. Radiat. Prot.

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A semi-empirical, non-destructive technique to evaluate the activity of gamma ray emitters in contaminated pipes is discussed. The technique is based on in-situ measurements by a portable NaI gamma ray spectrometer. The efficiency of the detector for the pipe and detector configuration was evaluated by Monte Carlo calculations performed using the MCNP code. Gamma ray detector full-energy peak efficiency was predicted assuming a homogeneous activity distribution over the internal surface of the pipe for 344 keV, 614 keV, 662 keV, and 1332 keV photons, representing Eu-152, Ag-118m, Cs-137, and Co-60 contamination, respectively. The effect of inhomogeneity on the accuracy of the technique was also examined. The model was validated against experimental measurements performed using a Cs-137 volume calibration source representing a contaminated pipe and good agreement was found between the calculated and experimental results. The technique represents a sensitive and cost-effective technology for calibrating portable gamma ray spectrometry systems and can be applied in a range of radiation protection and waste management applications

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Section: Detection Limitmentioning

confidence: 99%