Table 2.
Activity concentrations of 90Sr and 137Cs in water and food samples collected around NPPs in various regions of China.
| Samples | Tianwan NPP23 (sampling time: 2015–2016) | Haiyang NPP24 (sampling time: 2010–2011) | Sanmen NPP25,26 (sampling time: 2012–2019) | Qinshan NPP (this work) | Chinese regulatory limit21,27 | WHO regulatory limit22 | |
|---|---|---|---|---|---|---|---|
| 90Sr (mBq/L) | Source water | – | 2.43–6.47 | 1.6–9.8 | 4.3–11.1 | 100 | 1000 |
| Tap water | – | 1.21–9.00 | 1.2–8.3 | 5.0–8.2 | 100 | 1000 | |
| 137Cs (mBq/L) | Source water | – | – | 0.2–8.1 | 0.9–7.0 | 10 | 1000 |
| Tap water | – | – | 0.7–5.1 | 1.4–4.2 | 10 | 1000 | |
| 90Sr (Bq/kg)* | Rice | < 0.007 | – | 0.04–0.08 | 0.04–0.5 | 96 | – |
| Salsola | 0.02–0.4 | – | 0.07–0.4 | 0.3–1.1 | 77 | – | |
| Mullet | 0.03–0.05 | – | 0.2–0.7 | 0.4–1.1 | 290 | – | |
| Crucian carp | 0.002–0.05 | – | 0.3–1.2 | 0.6–1.3 | 290 | – | |
| 137Cs (Bq/kg)* | Rice | 0.004–0.008 | – | 0.02–0.081 | 0.03–0.09 | 260 | – |
| Salsola | 0.14–0.17 | – | 0.01–0.07 | 0.02–0.07 | 210 | – | |
| Mullet | 0.01–0.05 | – | 0.01–0.03 | 0.04–0.3 | 800 | – | |
| Crucian carp | 0.01–0.02 | – | 0.01–0.02 | 0.04–0.6 | 800 | – | |
– means there was no relevant data.
*Results for food samples were given as Bq/kg fresh weight.