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Table 5.
Estimated mean bias (C/E − 1) for the decay heat of a UO2 SNF, 3.95% enrichment and 53 MWd/kg, taking into account the main calculation biases for nuclide concentrations
| Cooling | Decay | Decay heat Bias due to | Bias | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| time | heat | 242Cm | 144Pr | 106Rh | 134Cs | 137Cs + | 90Y + | 244Cm | 238Pu | 239Pu | 240Pu | 241Am | Sum |
| 137mBa | 90Sr | ||||||||||||
| (years) | (W/t) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | (%) | |
| 1 | 14 460 | −1.3 | −1.5 | +9.6 | −1.4 | − | − | − | − | − | − | − | −5.4 |
| 10 | 2010 | − | − | +0.1 | −0.5 | −0.1 | −0.2 | +0.3 | −0.3 | − | − | − | −0.7 |
| 100 | 490 | − | − | − | − | −0.1 | −0.1 | +0.3 | −0.0 | +0.1 | +0.1 | −0.6 | −1.1 |
| 1000 | 80 | − | − | − | − | − | − | − | − | +0.4 | +0.4 | −0.8 | −0.0 |
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