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Table 5

Suitability, ongoing developments and potential further improvements of the different dosimetry techniques for post-irradiation and/or online photon heating measurements in ZPR.

Measurement technique Dosimetry in ZPR Comments/ongoing developments and further improvements
Post-irradiation TLD – Need to experimentally determine the neutron contribution to the total measured dose, by using the discrimination method described in Section 2.2 [11,59].
– A newly developed measurement method in high and ultra-high dose environments (fission and fusion power facilities, MTR, high-energy research accelerators, emergency dosimetry, etc.) could be used to measure doses up to kGy or MGy [6062].
OSLD – Linearity range limited to a few Gy [22], hence leading to a rapid saturation of the dosimeter when it is merely partially emptied at each readout.
Online (optical fiber) RIA
TL
RL Requires dose rate calibration and correction for the RIA losses beyond 105 Gy [53].
OSL The probe geometry, as well as the light source power and the stimulation protocol, have to be adapted to reactor specifications and irradiation parameters (time, operating power, dose rate), so as to ensure the online acquisition of the OSL signal without saturating the detector [58,63].
Using RL emission together with OSL signal [55,58], it may be possible to assess the instantaneous dose rate during irradiation and after reactor shutdown (delayed photons).

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