Evaluate the radioactivity along the central thimble hole of a decommissioned heavy water research reactor using TLD approach

The radioactivity along the central thimble hole of a decommissioned heavy water research reactor, TRR, was evaluated using TLD approach. The decay radionuclide was verified to be Co-60. The dose along the TRR central thimble hole was detected and revised by performing an unfolding analysis. The rev...

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Published in:Applied radiation and isotopes 2012-04, Vol.70 (4), p.720-725
Main Authors: Lee, Lun-Hui, Sher, Hai-Feng, Lu, I-Hsin, Pan, Lung-Kwang
Format: Article
Language:English
Subjects:
Decay nuclide
Deuterium Oxide
Dose
Nuclear Reactors
Radiation Monitoring - methods
Radioactivity
Reactor
TLD
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Sher, Hai-Feng
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description The radioactivity along the central thimble hole of a decommissioned heavy water research reactor, TRR, was evaluated using TLD approach. The decay radionuclide was verified to be Co-60. The dose along the TRR central thimble hole was detected and revised by performing an unfolding analysis. The revised data reduced to 70–90% of the original data (for example, the maximum dose rate was reduced from 6447 to 4831mSv/h,) and were more reliable. ► Well calibrated TLDs were applied to verify the dominant radionuclides remained in the decommissioned reactor. ► Point spread function was used to reveal the real dose distribution along the central vertical hole of reactor. ► Estimation of radioactive dose was built for the coming 10 years.
doi_str_mv 10.1016/j.apradiso.2011.12.022
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subjects Decay nuclide
Deuterium Oxide
Dose
Nuclear Reactors
Radiation Monitoring - methods
Radioactivity
Reactor
TLD
title Evaluate the radioactivity along the central thimble hole of a decommissioned heavy water research reactor using TLD approach
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