Simulation of a nuclear major accident at the Tricastin NPP

Rank, NPP code, date	mSv
1 TRI_2018-12-26	73.33
2 TRI_2018-10-17	30.48
3 TRI_2018-11-19	30.27
4 TRI_2018-02-04	23.06
5 TRI_2018-10-19	22.37
6 TRI_2017-12-06	21.09
7 TRI_2018-05-20	21.04
8 TRI_2018-09-11	19.25
9 TRI_2018-06-20	17.84
10 TRI_2018-09-04	16.05
11 TRI_2017-11-03	15.19
12 TRI_2021-07-22	14.50
13 TRI_2017-10-25	14.27
14 TRI_2021-12-24	14.17
15 TRI_2021-12-18	13.55
16 TRI_2021-09-23	13.51
17 TRI_2018-10-18	11.98
18 TRI_2017-10-31	11.17
19 TRI_2020-09-13	11.05
20 TRI_2021-11-23	10.41
21 TRI_2020-11-24	10.36
22 TRI_2021-12-22	9.86
23 TRI_2018-06-26	8.96
24 TRI_2021-10-24	8.73
25 TRI_2017-01-21	8.71
26 TRI_2020-02-15	8.64
27 TRI_2017-06-08	7.68
28 TRI_2020-05-29	7.51
29 TRI_2020-11-05	7.47
30 TRI_2020-05-07	7.07
31 TRI_2020-09-09	6.94
32 TRI_2018-12-13	6.76
33 TRI_2020-03-17	6.73
34 TRI_2018-08-28	6.51
35 TRI_2020-08-06	6.12
36 TRI_2020-08-15	6.12
37 TRI_2018-11-21	6.10
38 TRI_2021-08-10	5.99
39 TRI_2021-01-19	5.90
40 TRI_2017-08-22	5.80
41 TRI_2020-05-25	5.80
42 TRI_2020-05-14	5.65
43 TRI_2017-01-22	5.52
44 TRI_2020-07-19	5.37
45 TRI_2020-03-31	5.33
46 TRI_2021-04-22	5.26
47 TRI_2017-06-13	5.03
48 TRI_2018-09-10	5.02
49 TRI_2021-03-28	4.92
50 TRI_2018-11-22	4.80
51 TRI_2021-11-11	4.55
52 TRI_2018-10-16	4.51
53 TRI_2020-01-13	4.39
54 TRI_2021-11-25	4.25
55 TRI_2021-01-09	4.24
56 TRI_2020-05-27	4.15
57 TRI_2021-09-01	4.00
58 TRI_2018-11-18	3.82
59 TRI_2018-10-04	3.74
60 TRI_2021-10-27	3.60
61 TRI_2020-02-06	3.53
62 TRI_2018-05-28	3.47
63 TRI_2021-10-14	3.47
64 TRI_2017-01-20	3.28
65 TRI_2018-04-18	3.24
66 TRI_2021-02-04	3.22
67 TRI_2018-06-01	3.21
68 TRI_2020-09-17	3.18
69 TRI_2017-01-19	3.15
70 TRI_2017-06-18	3.07
71 TRI_2020-01-21	2.97
72 TRI_2018-02-05	2.91
73 TRI_2021-06-15	2.81
74 TRI_2020-06-23	2.80
75 TRI_2017-04-21	2.78
76 TRI_2017-05-05	2.67
77 TRI_2018-10-08	2.61
78 TRI_2017-05-16	2.56
79 TRI_2018-11-04	2.55
80 TRI_2021-12-17	2.49
81 TRI_2020-09-03	2.45
82 TRI_2017-05-25	2.43
83 TRI_2018-11-15	2.41
84 TRI_2021-09-22	2.39
85 TRI_2021-12-21	2.39
86 TRI_2017-01-03	2.37
87 TRI_2020-05-12	2.36
88 TRI_2018-10-09	2.35
89 TRI_2021-07-04	2.24
90 TRI_2020-04-13	2.20
91 TRI_2018-12-18	2.13
92 TRI_2018-01-13	2.08
93 TRI_2017-09-26	2.07
94 TRI_2018-02-28	2.06
95 TRI_2020-09-15	2.02
96 TRI_2018-08-05	1.86
97 TRI_2021-09-03	1.85
98 TRI_2021-03-06	1.84
99 TRI_2021-11-19	1.82
100 TRI_2021-10-16	1.80
101 TRI_2021-05-30	1.71
102 TRI_2020-04-14	1.69
103 TRI_2021-11-24	1.68
104 TRI_2020-04-21	1.65
105 TRI_2020-07-29	1.63
106 TRI_2017-03-16	1.62
107 TRI_2020-11-23	1.62
108 TRI_2020-03-23	1.57
109 TRI_2020-10-19	1.57
110 TRI_2021-08-31	1.50
111 TRI_2021-02-28	1.47
112 TRI_2018-01-24	1.41
113 TRI_2020-11-28	1.37
114 TRI_2020-05-26	1.33
115 TRI_2020-11-03	1.33
116 TRI_2020-01-05	1.31
117 TRI_2021-07-20	1.27
118 TRI_2017-05-24	1.26
119 TRI_2018-09-25	1.24
120 TRI_2020-11-12	1.23
121 TRI_2021-07-21	1.20
122 TRI_2021-11-09	1.19
123 TRI_2020-05-04	1.14
124 TRI_2018-05-19	1.12
125 TRI_2020-09-08	1.12
126 TRI_2018-06-19	1.11
127 TRI_2020-04-12	1.11
128 TRI_2020-05-11	1.09
129 TRI_2018-01-08	1.07
130 TRI_2020-03-24	1.07
131 TRI_2018-08-12	1.06
132 TRI_2021-08-12	1.05
133 TRI_2021-02-27	1.04
134 TRI_2020-11-22	1.02
135 TRI_2018-09-09	1.00
136 TRI_2020-09-07	1.00
137 TRI_2017-07-16	0.99
138 TRI_2018-06-28	0.99
139 TRI_2017-09-21	0.98
140 TRI_2017-08-13	0.95
141 TRI_2020-03-25	0.92
142 TRI_2020-08-08	0.91
143 TRI_2018-11-13	0.90
144 TRI_2018-04-12	0.86
145 TRI_2018-12-30	0.85
146 TRI_2018-11-20	0.84
147 TRI_2017-01-26	0.83
148 TRI_2018-04-05	0.83
149 TRI_2021-10-17	0.82
150 TRI_2020-05-13	0.80
151 TRI_2018-01-27	0.79
152 TRI_2017-02-15	0.78
153 TRI_2021-12-20	0.78
154 TRI_2017-06-26	0.76
155 TRI_2021-02-26	0.74
156 TRI_2017-04-07	0.71
157 TRI_2018-12-25	0.71
158 TRI_2020-11-27	0.70
159 TRI_2021-04-20	0.68
160 TRI_2021-11-16	0.68
161 TRI_2017-10-13	0.67
162 TRI_2018-02-27	0.66
163 TRI_2018-11-14	0.66
164 TRI_2021-07-18	0.66
165 TRI_2017-11-05	0.64
166 TRI_2018-11-03	0.64
167 TRI_2020-01-08	0.63
168 TRI_2018-11-08	0.57
169 TRI_2018-04-27	0.56
170 TRI_2017-07-03	0.55
171 TRI_2021-10-15	0.54
172 TRI_2018-11-17	0.53
173 TRI_2020-01-12	0.53
174 TRI_2020-11-17	0.53
175 TRI_2021-09-12	0.52
176 TRI_2021-10-25	0.51
177 TRI_2017-03-15	0.49
178 TRI_2017-08-21	0.49
179 TRI_2017-10-24	0.46
180 TRI_2020-02-14	0.43
181 TRI_2020-04-04	0.43
182 TRI_2021-03-26	0.43
183 TRI_2018-10-28	0.42
184 TRI_2017-07-29	0.39
185 TRI_2018-02-26	0.38
186 TRI_2020-01-22	0.38
187 TRI_2018-09-03	0.35
188 TRI_2017-05-09	0.34
189 TRI_2020-05-05	0.34
190 TRI_2021-05-28	0.32
191 TRI_2017-05-03	0.30
192 TRI_2017-06-09	0.30
193 TRI_2020-04-24	0.29
194 TRI_2021-07-19	0.29
195 TRI_2018-10-07	0.28
196 TRI_2017-06-11	0.25
197 TRI_2020-05-28	0.25
198 TRI_2021-04-21	0.23
199 TRI_2017-04-20	0.22
200 TRI_2018-11-16	0.22
201 TRI_2017-04-29	0.21
202 TRI_2021-04-01	0.21
203 TRI_2021-10-22	0.21
204 TRI_2017-06-17	0.20
205 TRI_2017-09-25	0.20
206 TRI_2020-08-05	0.20
207 TRI_2017-04-01	0.18
208 TRI_2017-07-04	0.17
209 TRI_2020-07-28	0.15
210 TRI_2021-12-16	0.15
211 TRI_2018-08-17	0.13
212 TRI_2020-03-30	0.13
213 TRI_2021-10-26	0.11
214 TRI_2020-03-29	0.10
215 TRI_2020-11-11	0.09
216 TRI_2020-03-14	0.08
217 TRI_2020-03-18	0.08
218 TRI_2018-05-13	0.07
219 TRI_2020-11-04	0.07
220 TRI_2017-11-02	0.05
221 TRI_2017-01-01	0.00
222 TRI_2017-01-02	0.00
223 TRI_2017-01-04	0.00
224 TRI_2017-01-05	0.00

Rank, NPP code, date

mSv

1 TRI_2018-12-26

73.33

30.48

30.27

23.06

22.37

21.09

21.04

19.25

17.84

16.05

15.19

14.50

14.27

14.17

13.55

13.51

11.98

11.17

11.05

10.41

10.36

9.86

8.96

8.73

8.71

8.64

7.68

7.51

7.47

7.07

6.94

6.76

6.73

6.51

6.12

6.12

6.10

5.99

5.90

5.80

5.80

5.65

5.52

5.37

5.33

5.26

5.03

5.02

4.92

4.80

4.55

4.51

4.39

4.25

4.24

4.15

4.00

3.82

3.74

3.60

3.53

3.47

3.47

3.28

3.24

3.22

3.21

3.18

3.15

3.07

2.97

2.91

2.81

2.80

2.78

2.67

2.61

2.56

2.55

2.49

2.45

2.43

2.41

2.39

2.39

2.37

2.36

2.35

2.24

2.20

2.13

2.08

2.07

2.06

2.02

1.86

1.85

1.84

1.82

1.80

1.71

1.69

1.68

1.65

1.63

1.62

1.62

1.57

1.57

1.50

1.47

1.41

1.37

1.33

1.33

1.31

1.27

1.26

1.24

1.23

1.20

1.19

1.14

1.12

1.12

1.11

1.11

1.09

1.07

1.07

1.06

1.05

1.04

1.02

1.00

1.00

0.99

0.99

0.98

0.95

0.92

0.91

0.90

0.86

0.85

0.84

0.83

0.83

0.82

0.80

0.79

0.78

0.78

0.76

0.74

0.71

0.71

0.70

0.68

0.68

0.67

0.66

0.66

0.66

0.64

0.64

0.63

0.57

0.56

0.55

0.54

0.53

0.53

0.53

0.52

0.51

0.49

0.49

0.46

0.43

0.43

0.43

0.42

0.39

0.38

0.38

0.35

0.34

0.34

0.32

0.30

0.30

0.29

0.29

0.28

0.25

0.25

0.23

0.22

0.22

0.21

0.21

0.21

0.20

0.20

0.20

0.18

0.17

0.15

0.15

0.13

0.13

0.11

0.10

0.09

0.08

0.08

0.07

0.07

0.05

0.00

0.00

0.00

0.00

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.

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

Possible impact on the inhabitants of :

Carcassonne (228 km) FRA

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

ADDITIONAL EXPLANATION ON THE TABLE

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)