Simulation of a nuclear major accident at the Tricastin NPP

Rank, NPP code, date	mSv
1 TRI_2020-08-11	22.47
2 TRI_2021-09-02	19.76
3 TRI_2020-01-24	19.00
4 TRI_2020-05-04	17.87
5 TRI_2021-03-01	17.04
6 TRI_2018-05-30	15.02
7 TRI_2020-11-12	14.53
8 TRI_2021-12-17	14.15
9 TRI_2021-09-03	12.24
10 TRI_2018-11-19	10.92
11 TRI_2018-01-14	10.89
12 TRI_2021-02-04	10.71
13 TRI_2017-03-26	10.31
14 TRI_2020-11-23	10.17
15 TRI_2020-11-26	9.34
16 TRI_2020-04-18	9.25
17 TRI_2020-03-20	8.98
18 TRI_2017-01-25	8.96
19 TRI_2020-11-27	7.93
20 TRI_2018-04-11	7.64
21 TRI_2020-10-19	6.93
22 TRI_2017-08-27	6.83
23 TRI_2018-05-27	6.63
24 TRI_2021-04-25	6.58
25 TRI_2020-05-31	6.21
26 TRI_2018-01-13	6.08
27 TRI_2021-04-26	6.06
28 TRI_2021-10-17	5.93
29 TRI_2018-09-25	5.89
30 TRI_2017-06-08	5.64
31 TRI_2018-11-22	5.63
32 TRI_2018-11-14	5.60
33 TRI_2021-12-22	5.53
34 TRI_2020-04-04	5.52
35 TRI_2020-03-21	5.51
36 TRI_2021-12-24	5.45
37 TRI_2020-02-06	5.42
38 TRI_2018-10-16	5.23
39 TRI_2018-03-24	5.02
40 TRI_2021-10-27	4.88
41 TRI_2021-09-06	4.87
42 TRI_2017-07-07	4.78
43 TRI_2018-12-13	4.77
44 TRI_2020-04-09	4.77
45 TRI_2020-03-18	4.58
46 TRI_2021-10-18	4.54
47 TRI_2018-04-12	4.50
48 TRI_2020-03-15	4.22
49 TRI_2020-09-13	4.15
50 TRI_2017-05-05	4.07
51 TRI_2018-11-23	4.07
52 TRI_2021-10-28	3.97
53 TRI_2018-11-08	3.79
54 TRI_2018-12-18	3.77
55 TRI_2018-11-17	3.69
56 TRI_2017-05-31	3.68
57 TRI_2021-04-23	3.61
58 TRI_2020-11-06	3.59
59 TRI_2020-12-16	3.53
60 TRI_2021-09-23	3.24
61 TRI_2017-04-29	3.22
62 TRI_2018-04-21	3.20
63 TRI_2018-11-15	3.11
64 TRI_2020-09-20	3.09
65 TRI_2021-10-24	3.09
66 TRI_2020-02-15	3.07
67 TRI_2020-08-15	3.01
68 TRI_2017-05-10	2.98
69 TRI_2018-06-09	2.96
70 TRI_2017-06-13	2.92
71 TRI_2018-04-09	2.92
72 TRI_2018-04-28	2.91
73 TRI_2017-08-28	2.88
74 TRI_2018-10-06	2.86
75 TRI_2018-06-02	2.84
76 TRI_2018-06-01	2.79
77 TRI_2020-03-22	2.78
78 TRI_2020-04-15	2.73
79 TRI_2021-07-23	2.73
80 TRI_2018-08-28	2.72
81 TRI_2018-04-19	2.69
82 TRI_2020-01-25	2.64
83 TRI_2021-05-30	2.60
84 TRI_2018-05-20	2.59
85 TRI_2017-11-02	2.58
86 TRI_2021-07-22	2.58
87 TRI_2018-11-21	2.57
88 TRI_2020-05-11	2.56
89 TRI_2020-07-30	2.56
90 TRI_2021-09-22	2.51
91 TRI_2017-03-30	2.48
92 TRI_2020-04-08	2.47
93 TRI_2020-06-01	2.46
94 TRI_2021-11-19	2.36
95 TRI_2021-01-19	2.35
96 TRI_2021-04-01	2.33
97 TRI_2021-10-22	2.33
98 TRI_2017-05-16	2.32
99 TRI_2018-06-07	2.31
100 TRI_2017-10-13	2.27
101 TRI_2018-06-29	2.25
102 TRI_2018-09-10	2.09
103 TRI_2020-09-17	2.08
104 TRI_2017-02-14	2.00
105 TRI_2020-01-13	1.95
106 TRI_2021-09-24	1.95
107 TRI_2017-05-09	1.94
108 TRI_2017-06-20	1.91
109 TRI_2018-10-10	1.82
110 TRI_2017-11-03	1.79
111 TRI_2018-01-24	1.79
112 TRI_2018-04-18	1.75
113 TRI_2020-04-13	1.67
114 TRI_2021-12-16	1.65
115 TRI_2020-04-10	1.60
116 TRI_2017-10-31	1.58
117 TRI_2018-01-10	1.58
118 TRI_2020-06-23	1.57
119 TRI_2021-12-21	1.55
120 TRI_2021-03-28	1.53
121 TRI_2018-09-11	1.51
122 TRI_2018-02-28	1.45
123 TRI_2020-09-04	1.42
124 TRI_2020-05-13	1.38
125 TRI_2017-01-02	1.31
126 TRI_2020-11-24	1.29
127 TRI_2017-05-30	1.26
128 TRI_2020-11-05	1.25
129 TRI_2018-04-06	1.24
130 TRI_2020-03-19	1.24
131 TRI_2017-07-04	1.23
132 TRI_2020-03-23	1.23
133 TRI_2018-09-16	1.12
134 TRI_2021-09-05	1.11
135 TRI_2017-02-15	1.05
136 TRI_2021-04-20	1.05
137 TRI_2018-06-04	1.03
138 TRI_2018-11-13	1.03
139 TRI_2018-06-30	1.02
140 TRI_2018-12-26	1.01
141 TRI_2021-06-27	0.98
142 TRI_2021-06-15	0.96
143 TRI_2020-01-05	0.94
144 TRI_2017-05-04	0.90
145 TRI_2017-06-18	0.90
146 TRI_2017-11-01	0.90
147 TRI_2017-03-22	0.83
148 TRI_2017-03-24	0.82
149 TRI_2020-07-29	0.82
150 TRI_2020-04-14	0.79
151 TRI_2018-02-05	0.78
152 TRI_2018-11-16	0.78
153 TRI_2021-04-22	0.75
154 TRI_2018-10-11	0.73
155 TRI_2018-01-08	0.68
156 TRI_2017-09-26	0.65
157 TRI_2018-06-03	0.63
158 TRI_2020-12-17	0.62
159 TRI_2020-01-16	0.60
160 TRI_2021-04-21	0.58
161 TRI_2018-11-25	0.57
162 TRI_2017-03-25	0.56
163 TRI_2020-09-16	0.56
164 TRI_2017-10-25	0.55
165 TRI_2020-01-12	0.55
166 TRI_2020-09-14	0.53
167 TRI_2018-10-28	0.50
168 TRI_2020-04-19	0.47
169 TRI_2017-08-22	0.36
170 TRI_2018-03-14	0.36
171 TRI_2018-04-20	0.36
172 TRI_2018-11-03	0.35
173 TRI_2017-05-03	0.33
174 TRI_2018-08-05	0.32
175 TRI_2018-04-05	0.31
176 TRI_2018-07-04	0.30
177 TRI_2020-01-23	0.29
178 TRI_2021-04-08	0.29
179 TRI_2017-03-15	0.27
180 TRI_2018-02-26	0.26
181 TRI_2020-04-07	0.26
182 TRI_2018-04-27	0.25
183 TRI_2017-12-06	0.21
184 TRI_2021-05-08	0.19
185 TRI_2021-08-31	0.17
186 TRI_2020-11-22	0.16
187 TRI_2018-10-04	0.14
188 TRI_2018-08-16	0.13
189 TRI_2020-03-25	0.12
190 TRI_2021-05-07	0.11
191 TRI_2018-02-04	0.06
192 TRI_2017-01-01	0.00
193 TRI_2017-01-03	0.00
194 TRI_2017-01-04	0.00
195 TRI_2017-01-05	0.00

Rank, NPP code, date

mSv

1 TRI_2020-08-11

22.47

19.76

19.00

17.87

17.04

15.02

14.53

14.15

12.24

10.92

10.89

10.71

10.31

10.17

9.34

9.25

8.98

8.96

7.93

7.64

6.93

6.83

6.63

6.58

6.21

6.08

6.06

5.93

5.89

5.64

5.63

5.60

5.53

5.52

5.51

5.45

5.42

5.23

5.02

4.88

4.87

4.78

4.77

4.77

4.58

4.54

4.50

4.22

4.15

4.07

4.07

3.97

3.79

3.77

3.69

3.68

3.61

3.59

3.53

3.24

3.22

3.20

3.11

3.09

3.09

3.07

3.01

2.98

2.96

2.92

2.92

2.91

2.88

2.86

2.84

2.79

2.78

2.73

2.73

2.72

2.69

2.64

2.60

2.59

2.58

2.58

2.57

2.56

2.56

2.51

2.48

2.47

2.46

2.36

2.35

2.33

2.33

2.32

2.31

2.27

2.25

2.09

2.08

2.00

1.95

1.95

1.94

1.91

1.82

1.79

1.79

1.75

1.67

1.65

1.60

1.58

1.58

1.57

1.55

1.53

1.51

1.45

1.42

1.38

1.31

1.29

1.26

1.25

1.24

1.24

1.23

1.23

1.12

1.11

1.05

1.05

1.03

1.03

1.02

1.01

0.98

0.96

0.94

0.90

0.90

0.90

0.83

0.82

0.82

0.79

0.78

0.78

0.75

0.73

0.68

0.65

0.63

0.62

0.60

0.58

0.57

0.56

0.56

0.55

0.55

0.53

0.50

0.47

0.36

0.36

0.36

0.35

0.33

0.32

0.31

0.30

0.29

0.29

0.27

0.26

0.26

0.25

0.21

0.19

0.17

0.16

0.14

0.13

0.12

0.11

0.06

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 :

Clermont‑Ferrand (203 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)