Open Access
Table 2
Yankee Rowe general data and assumptions.
| Parameter | Value | Remark |
|---|---|---|
| Rod outside diameter (cm) | 0.864 | [1,12] |
| Cladding thickness (cm) | 0.053 | [1,12] |
| Gap size (diametral) (cm) | 0.011 | [1,12] |
| Fuel rod pitch (cm) | 1.153 | [1,12] |
| Fuel pellet diameter (cm) | 0.747 | [1,12] |
| Fuel pellet density (%) | 93 | [1] |
| Fill gas internal rod pressure (MPa) | 0.1 | The fuel rod is not pressurized [1] |
| Active fuel length (cm) | 229.9 | [12] |
| Concentration of the gas components at the beginning of the calculation | 0.8 N2
0.2 O2 |
The fuel rod is not pressurized, then it was considered the air composition [1] |
| U235 enrichment degree (%) | 3.4 | [1,12] |
| Free volume in the upper plenum available for filling gas and fission gas (cm3) | 4.359 | The plenum height assumption considered a conservative value taking into account the fuel stack height |
| Coolant flow rate (g h–1) | 7.86 × 105 | [12] |
| Coolant temperature (°C) | 252 | [1,12] |
| Coolant pressure (MPa) | 14 | [1,12] |
| Average LHGR (kW m–1) | 11.4 | Average rod power given in the literature for the Yankee Rowe fuel rods [1,12] |
| Design LHGR (kW m–1) | 35.3 | Design rod power given in the literature for the Yankee Rowe fuel rods [1,12] |
| Maximum cladding temperature surface (°C) | 343 | [1,12] |
| Average burnup (MWd tU–1) | 31000 | [1,12] |
| Neutron flux (cm–2 s–1) | 6.3 × 1013 | Average assumed value to achieve the final fluence level and burnup [1,12] |
| Final fluence level (n cm–2) | 6 × 1021 | [1,12] |
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