Open Access
Table 3
Actual measurement results.
| Hospital No. | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| Number of beds for thyroid cancer | 12 | 24 | 3 | 22 |
| Total volume of decay tanks (m3) | 350 | 135 | 99 | 198 |
| Volume per tank (m3) | 70 | 45 | 33 | 66 |
| Sampled decay tank | 1 | 1 | 1 | B |
| Actual collection volume (m3) | 70 | 43.2 | 33 | 66 |
| Collection period | 2023.8.21-2023.10.19 | 2023.12.4-2024.1.5 | 2023.8.7-2023.10.07 | 2023.10.14-2023.11.24 |
| Collection duration (days) | 59 | 32 | 61 | 41 |
| liquid effluent Input | Toilet + Shower | Toilet | Toilet | Toilet |
| Specific activity of 131I on the day of the tank is full (Bq/L) | 4.28E+05 | 1.67E+06 | 1.35E+06 | 1.62E+06 |
| Theoretical total activity (kNA, Bq) | 2.10E+11 | 4.21E+11 | 5.26E+10 | 3.86E+11 |
| Measured total activity (specific activity × volume, Bq) | 3.00E+10 | 7.21E+10 | 4.46E+10 | 1.07E+11 |
| Theoretical minimum storage time (days) | 116.43 | 124.46 | 100.39 | 123.45 |
| Monthly discharge after minimum storage time (Bq) | 1.28E+06 | 1.54E+06 | 7.62E+06 | 2.49E+06 |
| Below monthly discharge limit (9E+6Bq) or not | Yes | Yes | Yes | Yes |
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