Symbol of the Biosphere, the logo of the Biosphere Institute was designed to acknowledge that humans belong to this singular organism.
List of data         Methodology         Legal limit for radiation dose

Major accident in one of the four reactors of Tricastin NPP (4 × 2785 MWth)

Possible impact on the inhabitants of :

St‑Étienne (126 km) FRA

Maps of Individual committed effective doses received by inhabitants during the passage of the radioactive cloud (inhalation):
1° Each row of the table represents a different meteorological situation.
2° The hyperlink enables access to the related map.
Maps visible with free Google Earth software! Alternatively, after downloading a map file in KML format, go to google.com/earth/, launch Google Earth, click on "project" then on "open"!
Rank, NPP code, date mSv
1        TRI_2017-02-15 65.50
2        TRI_2020-12-08 63.17
3        TRI_2020-09-19 60.13
4        TRI_2020-06-13 59.02
5        TRI_2017-01-02 56.32
6        TRI_2018-12-19 48.78
7        TRI_2017-01-27 42.90
8        TRI_2018-11-09 40.33
9        TRI_2020-12-17 39.89
10        TRI_2017-03-23 36.99
11        TRI_2020-12-04 34.76
12        TRI_2018-04-04 34.55
13        TRI_2020-10-23 31.75
14        TRI_2018-03-11 31.29
15        TRI_2020-01-26 30.48
16        TRI_2020-12-18 29.19
17        TRI_2021-05-10 29.00
18        TRI_2021-01-20 27.55
19        TRI_2020-08-11 27.09
20        TRI_2021-01-21 27.03
21        TRI_2020-07-30 26.02
22        TRI_2020-08-10 25.87
23        TRI_2017-07-07 24.71
24        TRI_2017-08-27 24.47
25        TRI_2020-09-18 22.94
26        TRI_2021-04-25 22.91
27        TRI_2018-04-13 22.26
28        TRI_2020-12-07 21.11
29        TRI_2021-12-24 21.00
30        TRI_2020-01-25 20.73
31        TRI_2018-04-08 20.33
32        TRI_2017-12-11 20.10
33        TRI_2020-12-16 19.26
34        TRI_2020-03-20 19.18
35        TRI_2018-06-06 19.01
36        TRI_2020-01-16 18.12
37        TRI_2020-09-20 17.84
38        TRI_2018-06-03 17.51
39        TRI_2017-05-12 17.28
40        TRI_2018-10-05 16.68
41        TRI_2017-07-17 16.19
42        TRI_2018-05-25 16.11
43        TRI_2018-05-31 16.10
44        TRI_2018-04-14 16.08
45        TRI_2018-06-30 16.04
46        TRI_2020-11-26 15.92
47        TRI_2018-11-05 15.90
48        TRI_2018-03-10 15.15
49        TRI_2018-03-01 15.14
50        TRI_2020-09-04 15.03
51        TRI_2021-10-03 14.87
52        TRI_2020-01-24 14.49
53        TRI_2017-06-13 13.90
54        TRI_2018-10-15 13.71
55        TRI_2021-06-27 13.71
56        TRI_2018-05-07 13.44
57        TRI_2017-03-30 13.35
58        TRI_2020-04-15 13.21
59        TRI_2018-06-09 13.16
60        TRI_2020-10-19 13.10
61        TRI_2018-05-29 13.06
62        TRI_2017-07-31 12.98
63        TRI_2021-08-14 12.97
64        TRI_2020-11-12 12.90
65        TRI_2018-11-17 12.61
66        TRI_2018-11-13 12.51
67        TRI_2020-11-08 12.37
68        TRI_2018-06-29 12.30
69        TRI_2017-11-01 12.20
70        TRI_2020-03-15 12.01
71        TRI_2018-11-12 11.70
72        TRI_2018-03-24 11.61
73        TRI_2021-10-24 11.58
74        TRI_2018-02-06 11.31
75        TRI_2018-05-24 11.20
76        TRI_2018-04-19 10.98
77        TRI_2017-06-26 10.78
78        TRI_2018-06-05 10.76
79        TRI_2017-03-26 10.55
80        TRI_2020-07-31 10.54
81        TRI_2020-05-31 10.45
82        TRI_2021-02-22 10.21
83        TRI_2017-06-08 10.15
84        TRI_2021-09-14 10.09
85        TRI_2020-06-24 10.06
86        TRI_2017-02-10 9.82
87        TRI_2018-09-28 9.77
88        TRI_2017-07-09 9.73
89        TRI_2020-11-27 9.71
90        TRI_2020-02-15 9.51
91        TRI_2021-09-09 9.48
92        TRI_2020-11-06 9.46
93        TRI_2018-12-13 9.45
94        TRI_2017-09-27 9.27
95        TRI_2017-02-12 9.14
96        TRI_2020-04-10 9.13
97        TRI_2018-03-02 9.10
98        TRI_2018-06-02 8.65
99        TRI_2018-07-04 8.53
100        TRI_2020-09-15 8.48
101        TRI_2017-07-04 8.47
102        TRI_2020-09-14 8.32
103        TRI_2018-06-11 8.26
104        TRI_2018-09-16 8.22
105        TRI_2017-06-22 8.21
106        TRI_2018-01-06 8.16
107        TRI_2018-11-15 8.15
108        TRI_2021-02-23 8.09
109        TRI_2018-08-12 7.84
110        TRI_2017-08-29 7.70
111        TRI_2021-05-31 7.67
112        TRI_2021-12-22 7.41
113        TRI_2020-04-19 7.31
114        TRI_2021-10-18 6.94
115        TRI_2020-04-04 6.77
116        TRI_2021-02-05 6.60
117        TRI_2020-04-09 6.51
118        TRI_2021-01-19 6.34
119        TRI_2021-06-21 6.30
120        TRI_2021-10-30 6.30
121        TRI_2018-03-05 6.21
122        TRI_2021-10-01 6.13
123        TRI_2018-09-25 6.07
124        TRI_2021-03-29 5.91
125        TRI_2018-04-06 5.90
126        TRI_2018-11-21 5.88
127        TRI_2018-04-21 5.85
128        TRI_2020-01-12 5.80
129        TRI_2018-08-06 5.79
130        TRI_2018-09-26 5.77
131        TRI_2017-05-16 5.75
132        TRI_2017-03-27 5.64
133        TRI_2020-04-11 5.60
134        TRI_2021-03-26 5.50
135        TRI_2018-03-08 5.47
136        TRI_2017-04-24 5.37
137        TRI_2018-05-26 5.33
138        TRI_2018-11-20 5.29
139        TRI_2017-06-01 5.28
140        TRI_2020-05-04 5.23
141        TRI_2018-03-04 5.20
142        TRI_2020-08-07 5.14
143        TRI_2020-04-08 5.12
144        TRI_2020-06-01 5.09
145        TRI_2021-10-27 5.06
146        TRI_2018-04-10 5.05
147        TRI_2018-01-09 5.00
148        TRI_2020-02-06 4.99
149        TRI_2021-02-09 4.96
150        TRI_2017-10-13 4.94
151        TRI_2021-04-24 4.93
152        TRI_2017-09-28 4.86
153        TRI_2021-01-22 4.77
154        TRI_2021-08-21 4.77
155        TRI_2017-09-26 4.76
156        TRI_2017-08-14 4.71
157        TRI_2017-01-28 4.70
158        TRI_2018-09-10 4.70
159        TRI_2017-05-30 4.51
160        TRI_2018-06-04 4.51
161        TRI_2017-10-19 4.48
162        TRI_2021-07-23 4.44
163        TRI_2020-03-02 4.43
164        TRI_2021-06-26 4.41
165        TRI_2018-05-12 4.33
166        TRI_2021-10-31 4.25
167        TRI_2021-02-04 4.20
168        TRI_2021-09-24 4.20
169        TRI_2018-10-11 4.18
170        TRI_2017-02-13 4.03
171        TRI_2021-02-06 3.95
172        TRI_2018-11-01 3.94
173        TRI_2021-09-05 3.87
174        TRI_2020-04-13 3.85
175        TRI_2021-10-17 3.74
176        TRI_2017-08-22 3.72
177        TRI_2017-06-21 3.50
178        TRI_2021-09-07 3.36
179        TRI_2021-05-30 3.33
180        TRI_2018-07-27 3.31
181        TRI_2021-09-06 3.28
182        TRI_2020-08-15 3.13
183        TRI_2021-06-16 3.12
184        TRI_2021-06-28 3.09
185        TRI_2018-01-24 2.86
186        TRI_2021-12-17 2.83
187        TRI_2020-04-01 2.81
188        TRI_2018-08-28 2.78
189        TRI_2020-09-13 2.75
190        TRI_2017-01-29 2.71
191        TRI_2020-05-12 2.69
192        TRI_2021-07-22 2.68
193        TRI_2021-03-30 2.67
194        TRI_2017-04-23 2.62
195        TRI_2018-04-12 2.62
196        TRI_2020-07-29 2.62
197        TRI_2021-03-01 2.60
198        TRI_2020-01-13 2.59
199        TRI_2021-09-23 2.59
200        TRI_2017-05-31 2.58
201        TRI_2018-01-10 2.56
202        TRI_2017-06-20 2.55
203        TRI_2018-06-07 2.54
204        TRI_2017-02-03 2.53
205        TRI_2020-05-11 2.52
206        TRI_2017-05-05 2.51
207        TRI_2017-12-06 2.47
208        TRI_2018-05-11 2.42
209        TRI_2021-04-23 2.42
210        TRI_2021-03-06 2.36
211        TRI_2021-02-14 2.28
212        TRI_2018-01-26 2.23
213        TRI_2020-01-06 2.22
214        TRI_2018-09-09 2.19
215        TRI_2017-11-02 2.18
216        TRI_2018-11-08 2.15
217        TRI_2018-04-20 2.13
218        TRI_2017-07-22 2.11
219        TRI_2018-10-31 2.08
220        TRI_2020-08-13 2.07
221        TRI_2020-12-15 2.07
222        TRI_2018-01-14 2.02
223        TRI_2020-01-04 1.99
224        TRI_2017-04-08 1.97
225        TRI_2018-02-16 1.95
226        TRI_2017-08-28 1.90
227        TRI_2021-04-21 1.89
228        TRI_2020-05-07 1.85
229        TRI_2018-10-04 1.81
230        TRI_2021-08-12 1.80
231        TRI_2018-05-27 1.79
232        TRI_2018-06-20 1.78
233        TRI_2021-10-28 1.76
234        TRI_2017-08-02 1.75
235        TRI_2017-03-04 1.73
236        TRI_2018-05-30 1.69
237        TRI_2018-09-27 1.69
238        TRI_2017-07-21 1.67
239        TRI_2018-08-08 1.66
240        TRI_2020-08-09 1.65
241        TRI_2018-04-18 1.64
242        TRI_2021-03-04 1.64
243        TRI_2020-10-02 1.63
244        TRI_2018-04-27 1.62
245        TRI_2021-03-03 1.60
246        TRI_2020-04-24 1.58
247        TRI_2020-05-05 1.56
248        TRI_2021-06-22 1.56
249        TRI_2020-08-19 1.55
250        TRI_2018-05-20 1.53
251        TRI_2020-03-21 1.50
252        TRI_2017-06-18 1.49
253        TRI_2020-04-25 1.46
254        TRI_2021-04-22 1.43
255        TRI_2021-12-21 1.43
256        TRI_2020-07-27 1.39
257        TRI_2017-05-26 1.36
258        TRI_2021-04-01 1.35
259        TRI_2021-04-26 1.34
260        TRI_2020-03-19 1.33
261        TRI_2020-10-18 1.32
262        TRI_2020-04-18 1.29
263        TRI_2018-05-06 1.25
264        TRI_2017-06-06 1.23
265        TRI_2020-06-23 1.22
266        TRI_2017-05-09 1.21
267        TRI_2018-11-23 1.21
268        TRI_2020-01-23 1.21
269        TRI_2018-03-14 1.20
270        TRI_2018-10-13 1.19
271        TRI_2018-08-15 1.18
272        TRI_2018-06-01 1.16
273        TRI_2020-03-24 1.11
274        TRI_2020-04-05 1.06
275        TRI_2018-08-05 0.98
276        TRI_2020-09-16 0.97
277        TRI_2021-07-04 0.97
278        TRI_2017-02-14 0.96
279        TRI_2017-07-29 0.96
280        TRI_2020-03-18 0.96
281        TRI_2021-04-20 0.94
282        TRI_2018-10-27 0.93
283        TRI_2020-07-20 0.93
284        TRI_2020-06-25 0.91
285        TRI_2021-09-13 0.91
286        TRI_2021-04-08 0.90
287        TRI_2018-07-26 0.89
288        TRI_2017-07-03 0.85
289        TRI_2018-02-28 0.83
290        TRI_2021-05-08 0.82
291        TRI_2017-03-15 0.79
292        TRI_2017-10-31 0.77
293        TRI_2018-04-02 0.76
294        TRI_2018-09-11 0.72
295        TRI_2017-05-04 0.71
296        TRI_2018-11-25 0.69
297        TRI_2017-05-03 0.68
298        TRI_2018-02-27 0.68
299        TRI_2021-09-30 0.67
300        TRI_2021-06-19 0.65
301        TRI_2018-07-01 0.63
302        TRI_2018-01-13 0.61
303        TRI_2018-11-06 0.60
304        TRI_2018-11-19 0.59
305        TRI_2020-12-19 0.59
306        TRI_2020-09-17 0.57
307        TRI_2020-12-27 0.53
308        TRI_2020-06-12 0.46
309        TRI_2018-03-15 0.45
310        TRI_2018-04-05 0.45
311        TRI_2020-03-23 0.45
312        TRI_2021-03-31 0.45
313        TRI_2018-09-17 0.44
314        TRI_2021-05-29 0.44
315        TRI_2018-11-03 0.43
316        TRI_2020-02-14 0.41
317        TRI_2021-09-12 0.40
318        TRI_2017-05-10 0.39
319        TRI_2017-06-09 0.38
320        TRI_2017-04-29 0.37
321        TRI_2020-05-10 0.37
322        TRI_2017-05-27 0.36
323        TRI_2017-12-31 0.36
324        TRI_2018-07-14 0.35
325        TRI_2020-03-17 0.35
326        TRI_2020-11-23 0.34
327        TRI_2020-11-22 0.33
328        TRI_2021-03-02 0.33
329        TRI_2018-08-16 0.32
330        TRI_2021-12-20 0.32
331        TRI_2018-12-18 0.31
332        TRI_2017-03-22 0.30
333        TRI_2017-04-07 0.30
334        TRI_2017-12-23 0.30
335        TRI_2017-12-27 0.30
336        TRI_2017-05-21 0.29
337        TRI_2017-03-02 0.26
338        TRI_2018-03-30 0.26
339        TRI_2017-04-28 0.24
340        TRI_2021-03-05 0.24
341        TRI_2018-05-01 0.22
342        TRI_2020-04-06 0.22
343        TRI_2018-10-06 0.21
344        TRI_2017-11-03 0.20
345        TRI_2018-01-08 0.19
346        TRI_2018-05-21 0.19
347        TRI_2020-06-11 0.19
348        TRI_2018-04-09 0.18
349        TRI_2020-07-21 0.17
350        TRI_2018-09-04 0.16
351        TRI_2020-07-19 0.16
352        TRI_2017-07-20 0.15
353        TRI_2017-10-18 0.15
354        TRI_2018-04-29 0.15
355        TRI_2020-10-22 0.15
356        TRI_2021-06-14 0.14
357        TRI_2020-03-25 0.13
358        TRI_2020-04-02 0.13
359        TRI_2018-02-15 0.10
360        TRI_2021-06-15 0.10
361        TRI_2018-01-23 0.08
362        TRI_2017-01-25 0.06
363        TRI_2021-05-07 0.05
364        TRI_2017-01-01 0.00
365        TRI_2017-01-03 0.00
366        TRI_2017-01-04 0.00
367        TRI_2017-01-05 0.00


  See additional explanation after the below links
The first 8 localities are placed according to 8 cardinal points at about 30 km from Tricastin, the following localities are ranked according to the severity of the health impact in decreasing order: Meisse →N (FRA)         Dieulefit →NE (FRA)         Nyons →E (FRA)         Gigondas →SE (FRA)         St‑Geniès →S (FRA)         Fontarèches →SE (FRA)         Vagnas →W (FRA)         St‑Maurice d'Ardèche →NW (FRA)         Orange (FRA)         Montélimar (FRA)         Avignon (FRA)         Arles (FRA)         Privas (FRA)         Nîmes (FRA)         Valence (FRA)         Istres (FRA)         St‑Rambert‑d'Albon (FRA)         Vienne (FRA)         Aix‑en‑Provence (FRA)         Annonay (FRA)         Alès (FRA)         Marseille (FRA)         Villefranche‑sur‑Saône (FRA)         Lyon (FRA)         Cannes (FRA)         Mâcon (FRA)         Montpellier (FRA)         Bourgoin‑Jallieu (FRA)         Annecy (FRA)         Toulon (FRA)         Sanremo (ITA)         Nice (FRA)         Saint‑Tropez (FRA)         Feurs (FRA)         Cuneo (ITA)         Draguignan (FRA)         Genève (CHE)         Béziers (FRA)         St‑Étienne (FRA)         Monaco (MCO)         Lausanne (CHE)         Sisteron (FRA)         Roanne (FRA)         Torino (ITA)         Perpignan (FRA)         Pinerolo (ITA)         Bourg‑en‑Bresse (FRA)         Châtillon‑en‑Diois (FRA)         Issoire (FRA)         Grenoble (FRA)         Figueras (ESP)         Neuchâtel (CHE)         Alessandria (ITA)         Carcassonne (FRA)         Mende (FRA)         Bellegarde‑sur‑Valserine (FRA)         Digne (FRA)         Le Puy (FRA)         Chignin (FRA)         Vichy (FRA)         Pisa (ITA)         Gap (FRA)         Fribourg (CHE)         Savona (ITA)         Bologna (ITA)         Mulhouse (FRA)         Albi (FRA)         L'Alpe d'Huez (FRA)         Alba (ITA)         Dijon (FRA)         Bern (CHE)         Strasbourg (FRA)         Moulins (FRA)         Girona (ESP)         Genoa (ITA)         St‑Jean‑de‑Maurienne (FRA)         Nancy (FRA)         La Spezia (ITA)         Rodez (FRA)         Clermont‑Ferrand (FRA)        

See the potential impact on the following geographical areas:          Europe (51 countries)         Spain          France          Italy          Switzerland 


ADDITIONAL EXPLANATION ON THE TABLE
1° The radioactivity comes from the passage of the cloud in the hours following an accident;
2° The above individual doses do not include soil irradiation or ingestion of contaminated food after the passage of the cloud;
3° These figures are estimates;
4° SEE COMMENTARY ON LOW AND HIGH DOSES.

5° The calculations are not derived using the map in the illustration, but from another map – of the same format as the one for download on our website to study deposition – which explains some discrepancies between the figure and its illustration.
6° The analysis of the 11 situations producing the maximum fallout allows us to establish the highest risk for a given city, i.e., the consequences of weather situations occurring in 1% of the cases.
7° The above data allow for the identification of the meteorological conditions that would have the worst impact on the area in question, as well as those that would keep radioactivity away. In the event of a major accident at the nuclear power plant concerned, a quick comparison of this analysis with the then prevailing meteorological conditions could be very useful to act as decentralized as possible; local authorities could keep these analyses as ready references to better and more rapidly deploy population protection strategies.




Photo cropped from the work of Marianne Casamance, CC BY-SA 4.0, via Wikimedia Commons
Tricastin, France, pressurized water reactor (PWR), 4 × 2785 megawatts thermal (MWth)