The uncertainty budget for the secondary standard measurement system for the dose to water based on alanine/ESR was established. The relative standard measurement uncertainty is 0.15% for 25 Gy, 0.53% for 5 Gy and 1.5% for 2 Gy, respectively.
The given uncertainties are valid for irradiations in 60Co, excluding the uncertainty of the primary standard.
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