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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‑Jean‑de‑Maurienne (165 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_2018-07-02 34.84
2        TRI_2018-05-08 27.01
3        TRI_2018-12-02 21.37
4        TRI_2017-11-08 15.65
5        TRI_2017-09-14 15.30
6        TRI_2018-08-13 15.17
7        TRI_2018-02-01 14.95
8        TRI_2020-09-21 11.60
9        TRI_2018-07-20 10.70
10        TRI_2018-07-27 10.56
11        TRI_2018-08-29 10.50
12        TRI_2018-01-16 10.43
13        TRI_2018-09-18 10.24
14        TRI_2018-12-13 10.14
15        TRI_2018-03-12 9.86
16        TRI_2017-08-08 9.62
17        TRI_2018-09-30 8.42
18        TRI_2021-03-04 8.26
19        TRI_2018-03-14 7.43
20        TRI_2017-12-08 7.38
21        TRI_2020-10-04 7.35
22        TRI_2021-05-08 7.28
23        TRI_2020-04-01 7.26
24        TRI_2017-09-27 7.18
25        TRI_2018-05-31 7.05
26        TRI_2018-09-21 6.92
27        TRI_2021-10-21 5.87
28        TRI_2017-08-23 5.82
29        TRI_2020-07-27 5.75
30        TRI_2017-09-29 5.69
31        TRI_2018-07-19 5.69
32        TRI_2018-07-03 5.67
33        TRI_2017-12-14 5.61
34        TRI_2020-09-05 5.32
35        TRI_2021-11-02 5.28
36        TRI_2018-05-23 5.09
37        TRI_2017-06-02 4.98
38        TRI_2020-08-19 4.97
39        TRI_2018-10-26 4.96
40        TRI_2017-09-30 4.94
41        TRI_2020-04-26 4.92
42        TRI_2017-08-18 4.90
43        TRI_2018-09-12 4.86
44        TRI_2018-09-05 4.00
45        TRI_2021-09-07 3.93
46        TRI_2017-12-12 3.90
47        TRI_2017-11-25 3.88
48        TRI_2018-01-18 3.77
49        TRI_2018-04-12 3.76
50        TRI_2020-07-21 3.65
51        TRI_2017-12-06 3.64
52        TRI_2020-05-11 3.55
53        TRI_2020-08-10 3.45
54        TRI_2020-10-05 3.43
55        TRI_2017-12-30 3.41
56        TRI_2017-05-26 3.40
57        TRI_2018-04-22 3.39
58        TRI_2018-03-03 3.34
59        TRI_2017-08-02 3.27
60        TRI_2021-05-31 3.18
61        TRI_2018-06-07 3.16
62        TRI_2021-06-23 3.10
63        TRI_2017-09-28 3.05
64        TRI_2018-07-28 3.05
65        TRI_2018-08-12 3.04
66        TRI_2018-07-14 3.00
67        TRI_2020-05-15 2.82
68        TRI_2018-05-21 2.77
69        TRI_2017-05-27 2.66
70        TRI_2018-09-17 2.59
71        TRI_2020-10-18 2.59
72        TRI_2018-05-07 2.57
73        TRI_2017-04-09 2.54
74        TRI_2017-07-07 2.52
75        TRI_2018-06-09 2.51
76        TRI_2017-08-27 2.50
77        TRI_2017-07-21 2.49
78        TRI_2020-10-06 2.45
79        TRI_2018-06-29 2.43
80        TRI_2021-09-06 2.41
81        TRI_2020-09-14 2.37
82        TRI_2017-06-20 2.34
83        TRI_2018-10-27 2.23
84        TRI_2021-09-23 2.20
85        TRI_2018-03-24 2.18
86        TRI_2021-06-22 2.15
87        TRI_2020-08-15 2.11
88        TRI_2018-03-05 2.10
89        TRI_2020-08-11 2.04
90        TRI_2017-09-09 2.02
91        TRI_2018-12-21 2.02
92        TRI_2020-06-25 2.01
93        TRI_2018-10-06 1.98
94        TRI_2017-04-28 1.94
95        TRI_2020-09-03 1.94
96        TRI_2020-12-31 1.92
97        TRI_2021-05-16 1.91
98        TRI_2018-06-11 1.84
99        TRI_2017-03-22 1.83
100        TRI_2021-12-28 1.81
101        TRI_2018-02-16 1.78
102        TRI_2020-05-04 1.78
103        TRI_2018-08-28 1.77
104        TRI_2021-03-07 1.77
105        TRI_2021-04-08 1.77
106        TRI_2020-04-30 1.73
107        TRI_2017-08-15 1.70
108        TRI_2017-06-30 1.67
109        TRI_2021-08-21 1.66
110        TRI_2017-07-08 1.65
111        TRI_2018-05-06 1.64
112        TRI_2018-10-29 1.60
113        TRI_2018-03-02 1.59
114        TRI_2017-12-31 1.58
115        TRI_2017-05-09 1.56
116        TRI_2017-01-03 1.54
117        TRI_2020-07-20 1.54
118        TRI_2017-07-20 1.52
119        TRI_2018-06-20 1.51
120        TRI_2018-10-28 1.49
121        TRI_2021-04-24 1.49
122        TRI_2020-07-01 1.48
123        TRI_2021-03-31 1.45
124        TRI_2017-05-04 1.44
125        TRI_2020-06-27 1.42
126        TRI_2021-06-03 1.42
127        TRI_2021-04-27 1.40
128        TRI_2017-03-02 1.36
129        TRI_2018-08-16 1.34
130        TRI_2020-05-05 1.33
131        TRI_2017-06-06 1.31
132        TRI_2017-08-13 1.29
133        TRI_2017-07-22 1.27
134        TRI_2021-08-30 1.27
135        TRI_2017-06-29 1.25
136        TRI_2020-05-22 1.25
137        TRI_2021-08-13 1.23
138        TRI_2020-11-01 1.17
139        TRI_2017-12-07 1.13
140        TRI_2018-02-27 1.12
141        TRI_2020-06-01 1.10
142        TRI_2018-11-19 1.09
143        TRI_2017-01-25 1.07
144        TRI_2020-07-31 1.06
145        TRI_2021-06-26 1.06
146        TRI_2021-10-24 1.03
147        TRI_2017-06-28 1.01
148        TRI_2020-07-10 1.01
149        TRI_2020-08-13 1.00
150        TRI_2021-08-14 1.00
151        TRI_2017-06-03 0.96
152        TRI_2018-04-27 0.95
153        TRI_2017-05-30 0.92
154        TRI_2021-09-12 0.91
155        TRI_2018-03-29 0.89
156        TRI_2017-04-07 0.86
157        TRI_2017-07-29 0.86
158        TRI_2017-08-22 0.85
159        TRI_2020-06-11 0.84
160        TRI_2020-02-10 0.83
161        TRI_2021-07-27 0.82
162        TRI_2018-01-04 0.81
163        TRI_2020-06-24 0.79
164        TRI_2021-05-06 0.77
165        TRI_2017-06-09 0.74
166        TRI_2020-02-13 0.74
167        TRI_2020-09-30 0.74
168        TRI_2021-03-11 0.74
169        TRI_2017-08-31 0.73
170        TRI_2020-08-28 0.73
171        TRI_2020-09-20 0.73
172        TRI_2018-06-03 0.69
173        TRI_2020-03-01 0.69
174        TRI_2020-04-12 0.69
175        TRI_2018-07-26 0.66
176        TRI_2021-08-07 0.62
177        TRI_2017-06-11 0.61
178        TRI_2018-04-20 0.60
179        TRI_2018-08-06 0.60
180        TRI_2017-12-15 0.58
181        TRI_2017-09-26 0.56
182        TRI_2020-08-09 0.56
183        TRI_2018-06-30 0.55
184        TRI_2020-02-06 0.54
185        TRI_2017-04-01 0.53
186        TRI_2020-04-25 0.52
187        TRI_2021-05-24 0.52
188        TRI_2018-07-04 0.50
189        TRI_2018-09-26 0.50
190        TRI_2021-07-12 0.47
191        TRI_2018-11-03 0.46
192        TRI_2021-11-27 0.43
193        TRI_2017-07-04 0.41
194        TRI_2020-06-23 0.38
195        TRI_2017-07-03 0.37
196        TRI_2018-09-20 0.37
197        TRI_2020-12-07 0.36
198        TRI_2021-05-07 0.35
199        TRI_2018-12-16 0.34
200        TRI_2020-09-16 0.32
201        TRI_2018-09-11 0.30
202        TRI_2017-06-22 0.29
203        TRI_2017-06-08 0.28
204        TRI_2020-09-23 0.28
205        TRI_2017-12-10 0.27
206        TRI_2020-02-15 0.27
207        TRI_2020-07-30 0.27
208        TRI_2018-09-10 0.25
209        TRI_2017-08-28 0.24
210        TRI_2018-04-21 0.24
211        TRI_2020-03-18 0.24
212        TRI_2021-02-25 0.24
213        TRI_2018-08-31 0.23
214        TRI_2018-01-31 0.22
215        TRI_2021-07-04 0.20
216        TRI_2017-05-21 0.16
217        TRI_2018-01-03 0.15
218        TRI_2020-04-11 0.15
219        TRI_2017-08-03 0.14
220        TRI_2020-06-13 0.13
221        TRI_2020-04-22 0.12
222        TRI_2021-08-12 0.12
223        TRI_2021-05-05 0.07
224        TRI_2017-01-01 0.00
225        TRI_2017-01-02 0.00
226        TRI_2017-01-04 0.00
227        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)