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Intercomparison exercise on difficult to measure radionuclides in activated concrete - statistical analysis and comparison with activation calculations

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TLDR
In this article, the results obtained in a Nordic Nuclear Safety Research project during the second intercomparison exercise for the determination of difficult to measure radionuclides in decommissioning waste are reported.
Abstract
This paper reports the results obtained in a Nordic Nuclear Safety Research project during the second intercomparison exercise for the determination of difficult to measure radionuclides in decommissioning waste. Eight laboratories participated by carrying out radiochemical analysis of 3H, 14C, 36Cl, 41Ca, 55Fe and 63Ni in an activated concrete. In addition, gamma emitters, namely 152Eu and 60Co, were analysed. The assigned values were derived from the submitted results according to ISO 13,528 standard and the performance assessments were determined using z scores. The measured results were compared with activation calculation result showing varying degree of comparability.

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Validation and Optimization of Activity Estimates of the FiR 1 TRIGA Research Reactor Biological Shield Concrete

TL;DR: In this article , the authors describe the calculations and gamma activity measurements performed for the activated concrete samples to determine the boundary between radioactive parts and concrete that can plausibly be free-released from regulatory control.
Journal ArticleDOI

Hungarian Fine-to-Coarse Aggregate, a Possible Constituent of Near-Vessel Structural Concrete of Nuclear Power Plants

TL;DR: Significant gravel mines, representative of four regions of Hungary (northeast, central, northwest, and southwest) were systematically sampled to characterize their sand and pebbles as potential constituents of nuclear-grade concrete as discussed by the authors .
Journal ArticleDOI

Intercomparison exercise on difficult to measure radionuclides in spent ion exchange resin

TL;DR: In this article , a three-year project within the Nordic Nuclear Safety Research (NKS) community was initiated in order to carry out intercomparison exercises on difficult to measure (DTM) radionuclides in real decommissioning waste.
Journal ArticleDOI

New approaches for interlaboratory comparisons analysis using dark uncertainty applied to radioactive materials.

TL;DR: In this article , the authors propose a methodology for the organization and analysis of coordinated interlaboratory comparisons (ILC) for the performance assessment and the uncertainty evaluation of available measurement techniques (methods and tools) of radioactive materials.
References
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MCNP-A General Monte Carlo N-Particle Transport Code

TL;DR: In this article, the authors present a practical guide for the use of general-purpose Monte Carlo code MCNP, including several examples and a discussion of the particular techniques and the Monte Carlo method itself.
Journal ArticleDOI

Tutorial review. Calculating standard deviations and confidence intervals with a universally applicable spreadsheet technique

J. Kragten
- 01 Jan 1994 - 
TL;DR: In this paper, a spreadsheet method for the calculation of standard deviations based on the general formula for error propagation is presented, without violating the condition of mutual independence, with substantial time gain and with no risk of calculating errors.
Journal ArticleDOI

Isotopic depletion and decay methods and analysis capabilities in scale

TL;DR: The calculation of fuel isotopic compositions is essential to support design, safety analysis, and licensing of many components of the nuclear fuel cycle, from reactor physics and severe accident an... as discussed by the authors.
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