Logo IRSN

05 May 2020
Information note n°5

Fires in Ukraine in the exclusion zone around the Chernobyl power plant:
Latest measurement results and assessment of environmental and health consequences
Since the release of our previous information notes on April 7, 15, 17 and 24, 2020, fires would now be
extinguished.
This note presents the latest available information, in particular the results of radioactivity
measurements carried out by IRSN and by its Ukrainian and European scientific partners which attest acesium 137 (137Cs) labeling of air masses. The trajectory modeling of the fire-labeled air masses has
been updated taking into account this dataset.
Both field determinations, IRSN modeling investigations, and dosimetric estimations confirm thatthese fires did not have any environmental and health consequences in France.

1 / Current situation as of May 5, 2020
After a significant decrease in the number of fire outbreaks observed for ten days (see information noteof April 24, 2020)1, the rains that have fallen on the area since Saturday May 2, 2020 made it possible toextinguish all the fires, according to satellite images.
The satellite image of May 4, 2020, no longer shows any fire in the exclusion zone or near the Belarusianborder (see Figure 1).
According to the Ukrainian authorities2, the means deployed to fight the blazes remain mobilized inorder to keep under control any smoldering fires (from peat bogs, etc.).

Figure 1: Satellite fire detection image (no fire) as of May 4, 2020 at 6h30 (UTC) (source: NASA / FIRMS)3.
The Chernobyl nuclear power plant is marked with a star. Fire detection can be obscured by cloud cover)1

https://www.irsn.fr/EN/newsroom/News/Pages/20200424_Fires-in-Ukraine-in-the-Exclusion-Zone-around-chernobyl-cesium137-results-in-france.aspx
2
http://dazv.gov.ua/novini-ta-media/vsi-novyny.html

1In order to draw up the balance sheet of this event, IRSN has taken into account the cumulative fires
visible by satellite imagery since the beginning of April 2020. If, as indicated above, the situation has
improved over the past period of ten days (see Figure 2), the first three weeks of April saw thedevelopment of particularly large fires, both in area and number (see Figure 3). These different periods
have been taken into account in the radioactive release modeling.
The Ukrainian Hydrometeorological Institute (UHMI)4 reports that the area of fires on the territory of theChernobyl Exclusion Zone (CEZ) and adjacent areas from April 2 to April 20 would have reachedapproximately 800 km2. The burned area in the area close to the Chernobyl power plant was estimatedat about 65 km2.

Figure 2: Cumulative map of satellite fire detections between April 27 and May 4, 2020 (source: NASA /FIRMS). The Chernobyl nuclear power plant is marked with a star.

Figure 3: cumulative map of satellite fire detections between April 1 and May 1, 2020 (source: NASA /FIRMS). The Chernobyl nuclear power plant is marked with a star.

34

https://firms.modaps.eosdis.nasa.gov/
https://uhmi.org.ua/msg/fire2020/analytical.pdf

22 / IRSN’s measurements in France
The IRSN publishes below all of its up-to-date available results in the air from aerosol sampling stations
belonging to the IRSN’s OPERA network5.
Table 1: IRSN measurements of the airborne 137Cs volume activity
Sampling Location

Sampling period

Airborne 137Cs(µBq/m3)(Department)fromto28/03/2020
04/04/2020
0,294 ± 0,048* Bouc Bel Air (13)04/04/2020
10/04/2020
1,16 ± 0,22
* Bouc Bel Air (13)10/04/2020
17/04/2020
1,16 ± 0,13
* Bouc Bel Air (13)17/04/2020
24/04/2020
0,288 ± 0,054* Bouc Bel Air (13)30/03/2020
06/04/2020
0,184 ± 0,046* Dijon (21)06/04/2020
10/04/2020
0,59 ± 0,12
* Dijon (21)15/04/2020
22/04/2020
0,344 ± 0,064* Dijon (21)07/04/2020
14/04/2020
0,622 ± 0,11
* Mérignac (33)01/04/2020
08/04/2020
0,139 ± 0,031* Orsay (91)
08/04/2020
15/04/2020
0,267 ± 0,064* Orsay (91)15/04/2020
22/04/2020
0,290 ± 0,066* Orsay (91)01/04/2020
16/04/2020
0,183 ± 0,038* Revin (08)16/04/2020
28/04/2020
0,404 ± 0,070* Revin (08)03/04/2020
09/04/2020
0,269 ± 0,079* Romagnat (63)09/04/2020
16/04/2020
0,72 ± 0,11
* Romagnat (63)30/03/2020
06/04/2020< 2,70** Bugey (01)30/03/2020
06/04/2020
0,48 ± 0,18** Cadarache (13)06/04/2020
14/04/2020
1,31 ± 0,24** Cadarache (13)30/03/2020
06/04/2020< 0,70** Fessenheim (68)06/04/2020
13/04/2020
0,51 ± 0,20** Fessenheim (68)13/04/2020
20/04/2020< 0,44** Fessenheim (68)30/03/2020
06/04/2020< 0,44** Grenoble (38)06/04/2020
14/04/2020
0,92 ± 0,25** Grenoble (38)14/04/2020
20/04/2020< 0,60** Grenoble (38)31/03/2020
07/04/2020< 2,50** Nancy (54)07/04/2020
14/04/2020< 2,60** Nancy (54)14/04/2020
21/04/2020< 3,00** Nancy (54)06/04/2020
13/04/2020
0,74 ± 0,22** Saint-Alban (38)The results indicated after the symbol < correspond to values below the decision threshold.
The activities are returned to the date of mid-collection (by agreement).
Localities whose names are preceded by an * are equipped with a high sampling-rate station (400 to 700m3/h) for trace detections.
Localities whose names are preceded by ** are equipped with a lower sampling-rate station (80 m3/h).

5The operating diagram of the OPERA network (from sampling to measurement of aerosol filters) is presented in
the appendix of the 4th IRSN information note of April 24, 2020.

3

Results in bold are those that IRSN considers to be higher than the 137Cs background level6 usuallyobserved at each of these stations and for that season.
Given the good correlation between sampling dates and modeling expectations of the arrival of air
masses on French territory, IRSN attributes this slight increase to radioactive labeling of air masses fromthe fire areas in Ukraine.
The highest airborne 137Cs activity was measured at the Cadarache station (1.31 ± 0.24 µBq/m 3) from
April 6 to 14, 2020. This measurement and those at the Bouc Bel Air station confirm model results
which indicated that the masses would enter France through its South-Eastern corner.
IRSN publishes in an appendix the measurements carried out by Ukrainian partners7 and other
European partners6 for who 137Cs activity levels likely include 137Cs emitted by fires. These
measurements follow a decreasing east-to-west gradient over the first half of April 2020, reflecting adilution of the airborne 137Cs activity along the route of air masses.
A large number of measurements have been performed in Ukraine, which makes it possible toconsolidate the estimation of the radiological labeling of air masses. The measurements confirm that thecontamination of the air masses was of the order of a fraction of mBq/m 3 in the Kiev area and a fractionof Bq/m3 in the CEZ.

3 / Modeling
Using meteorological data provided by Météo-France, IRSN has completed its simulation of the air masstransport which now covers the period from April, 2 to 30, 2020 (midnight).
According to this modeling, the total amount of 137Cs re-emitted into the atmosphere during this period
is estimated at about 700 GBq between April, 2 and April, 30, 2020. Most (625 GBq) of this release(established from the measurement results), occurred during the most intense fire period (from April, 2
to 24, 2020). For the following days and in view of the evolution of the situation, IRSN estimated that thereleases were 20 GBq per day from April 25 to 27, then 5 GBq per day from April 28 to 30, reflecting thesignificant reduction in the number of fires after the rains of April 26, 2020.
The video8 of the air mass dispersion simulation between April, 2 and April, 30 is available on the IRSN
website.
The simulation shows the arrival of a first plume with low-labeled air mass from April, 7 by the southeast of France, and which have lasted until April 14, 2020, consistent with the results in Cadarache andBouc Bel Air.
The updated modeling also shows that a second plume of labeled air mass arrived in France from April
23, 2020 by the south-east with similar concentration levels or even lower than the previous ones, andundoubtedly close to detection limits of the best performing equipment. These air masses would haveremained on a part of the French territory until April 28, 2020 before being evacuated under the effectof west winds.

6
7

Resulting from global fallout from nuclear weapon tests and Chernobyl fallout
Members of the Ring of Five (Ro5) network

8

https://www.irsn.fr/EN/newsroom/News/Pages/20200505_Fires-in-Ukraine-in-the-Exclusion-Zone-around-chernobyl-latestnews-and-consequences.aspx

44 / Dosimetric impact
The passage over France of a contaminated air mass marked by 137Cs up to about 2 µBq/m3 on a
weekly average9, caused a tiny exposure of the French population. This exposure is mainly related to137
Cs deposition on the ground surface. This deposition that has built up over a week is estimated to
0.006 Bq/m2. As a reminder, in May 1 to 3, 1986, the average airborne activity in the East of France wasaround 1 Bq/m3; due to rains which occurred at that time. The contamination of the air had caused
deposition ranging from 2000 Bq/m2 (in the absence of rain) to more than 40,000 Bq/m2 in the mostaffected areas.
For a person who would permanently stay outside throughout the year 2020, the 137Cs deposition of
0.006 Bq/m2 related to the April 2020’s fires, would result in an effective external dose of 0.08 nSv 10.
This dose is in the order of 100,000 to 1 million times lower than that resulting from exposure to 137Cs
already present in French soil since nuclear tests and the Chernobyl accident. These range from less than
5,000 nSv/year to nearly 50,000 nSv/year.
In addition, the doses linked to inhalation and external exposure during the passage of the labeled air
masses (one week), were negligible (less than 0.002 nSv) compared to those linked to deposition.
Part of the 137Cs deposited in last April was intercepted by the plant leaves, grassland, and agricultural
products during cultivation. The maximum contamination that could result from it probably did notexceed 3 mBq/kg fresh weight in leafy vegetables (salads, spinach ...) and meat, and 0.6 mBq/L in milk.
This 137Cs added contamination is much lower than that usually measured in foodstuffs produced in
France, which is around 10 to 50 mBq/kg in vegetables, from 10 to 200 mBq/L in milk and 20 to 700
mBq/kg in beef meat. Assuming continuous consumption until the end of the year, the effective dosestarted in 2020, would be 0.5 nSv. For the sake of comparison, the current average effective dose in
France linked to 137Cs incorporation is estimated at about 200 nSv/year. In 1986, it had been estimated at
140,000 nSv (or 0.14 milliSievert, mSv) from May to December 1986 (i.e. over the same period).
The first strontium 90 (90Sr) analyses in the air carried out in Ukraine show that its airborne activity
would be approximately 4 times weaker than those of 137Cs. We can suppose that the 90Sr airborne
contamination in France was also 4 times lower than for 137Cs, i.e. a 90Sr activity of the order of 0.5µBq/m3 on average during the week concerned11. Although more radiotoxic than 137Cs, the total dose
due to 90Sr fallout in France following fires in Ukraine would be around 10 times lower than that due to137
Cs fallout. This low contribution is mainly explained by the fact that the external exposure to thedeposition is much lower for 90Sr (no gamma radiation)12 and that the transfer of 90Sr to meat is about
100 times lower than that of 137Cs.

9

Each measurement result represents an average value over a usual 7-day sampling period which does notnecessarily corresponds to the period during where the 137Cs-labeled air mass resulting from fires in Ukraine waspresent at the sampling station. Therefore it can lead to a lower value compared with what would have beenmeasured if the sampling had started exactly at the time of the air mass arrival. In order to take this into account,the IRSN, based on its weekly routine airborne 137Cs measurements at the closest OPERA station to Bouc Bel Air (i.e.
the one located at La Seyne sur Mer in the Var department) estimated the usual average background value
measured in the same period (March to May) over the past 5 years, in the region. This average 137Cs backgroundlevel is 0.15 µBq/m3. By subtracting this background level and most precise estimated dates of the 137Cs-labeled air
mass resulting from fires (data from modeling performed by IRSN), IRSN estimated that the average 137Cs level
added by fires in Ukraine during the presence of the air mass is about 2 µBq/m 3.
10

1 nanoSievert (nSv) = 10-9 Sievert

11

Filters from the IRSN’s OPERA stations with the most significant 137Cs added activities will be analyzed for 90Sr.
As a pure beta emitter 90Sr does not emit gamma radiation

125

Regarding the dose estimates that may have been received by the general public in the Kiev region ornear the exclusion zone, the measurements transmitted by the Ukrainian partners13 of the Instituteconfirm the order of magnitude of the dosimetric evaluations presented in the April 15, 2020
information note, i.e. a maximum of a few tens of µSv for the consumption of foodstuffs contaminatedby radioactive ash deposits near the exclusion zone.
Regarding the possible impact of plutonium in Ukraine, IRSN does not currently have measurements of
its airborne activity. Furthermore, in France, it is very likely that the isotopes of this radioelement are too
low to be measured, even with the most efficient techniques. Qualitatively, it can be emphasized that,
unlike 137Cs and 90Sr, the transfer of plutonium to plants is extremely low; this element is therefore very
little present in forest organic matter and remains fixed in the mineral fraction of soil contaminated in1986. Its resuspension during fire events therefore had to be very low. Furthermore, plutonium is notmuch transferred in the food chain. Despite its high radiotoxicity, it is therefore likely that its
contribution to the population exposure by inhalation or ingestion has been negligible. It also does notcause any external exposure.

5 / Risk for storage facilities
Regarding the safety of the facilities on the Chernobyl plant site and in the CEZ there are no newelements, compared to those appearing in the previous note (April 15 and April 17, 2020). Regarding thewaste storages in this area, the measurements transmitted by our Ukrainian scientific partners have notrevealed any release of activity from former deposition, which could have been caused by the fires.

IRSN will continue to measure aerosol filters from its OPERA stations, especially to check for activity
levels due to the passage of the second plume. These measurement results will be published on thewebsite of the National Network for Radioactivity in the Environment14.

13

Ukrainian Government Agency for the Exclusion Zone Management (DAZV), Ukrainian Hydrometeorological
Institute, Kiev (UHMI), Central Geophyscial Observatory, Kiev (CGO), SSE "Ecocentre", Kiev.
14

https://www.mesure-radioactivite.fr

6

Appendix

Measurements performed by IRSN foreign counterparts for which the detection of 137Cs is clearly
linked to the fire emissions (Ukrainian partners) or likely to be (other European partners)

Start ofsampling

End ofsampling

Radionuclide

Airborne
activity(µBq/m3)

Location

CountryBrno

06/04/2020

14/04/2020

Cs-1372,51

České Budějovice

Czech RepublicCzech Republic

30/03/2020

07/04/2020

Cs-1371,42

České Budějovice

Czech Republic

07/04/2020

14/04/2020

Cs-137

1,84

Holešov

Czech Republic

06/04/2020

13/04/2020

Cs-137

3,75

Hradec Králové

Czech Republic

06/04/2020

14/04/2020

Cs-137

3,22

Cheb

Czech Republic

31/03/2020

07/04/2020

Cs-137

1,53

KamennáCzech Republic

06/04/2020

14/04/2020

Cs-137

1,83

Ostrava

Czech Republic

06/04/2020

13/04/2020

Cs-137

2,85

Praha

Czech Republic

07/04/2020

14/04/2020

Cs-1371,61Ústí nad Labem

Czech Republic

01/04/2020

07/04/2020

Cs-137

1,81

Thessaloniki
Thessaloniki
Thessaloniki
Thessaloniki
Svanhovd
Viksjofjell
Ahronomiya
Arbuzinka
Arbuzinka
Arbuzinka
Baryshivka
Baryshivka
Baryshivka
BuhsʹkeBuhsʹkeBuryakivka
Buryakivka

GreeceGreeceGreeceGreeceNorwayNorwayUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraine11/04/2020
14/04/2020
20/04/2020
23/04/2020
14/04/2020
12/04/2020
08/04/2020
31/03/2020
07/04/2020
14/04/2020
11/04/2020
14/04/2020
17/04/2020
01/04/2020
08/04/2020
30/03/2020
30/03/2020

13/04/2020
16/04/2020
22/04/2020
24/04/2020
20/04/2020
19/04/2020
15/04/2020
07/04/2020
14/04/2020
21/04/2020
14/04/2020
17/04/2020
20/04/2020
08/04/2020
15/04/2020
04/04/2020
04/04/2020

Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Sr-90

20
8
6
8
0,4
0,5
75
8,22
53
18,4
45
190
170
10,3
49
210
63

7

Buryakivka
Buryakivka
Buryakivka
Buryakivka
Buryakivka
Buryakivka
Chornobyl
Chornobyl
Chornobyl
Chornobyl
Chornobyl
Chornobyl
Chornobyl
Chornobyl
Chornobyl
Chornobyl
Chornobyl
Chornobyl
ChNPP area
ASKRS Chernobyl
Denisovetske forestry
Dytyatky
Dytyatky
Dytyatky
Dytyatky
Dytyatky
Dytyatky
ASKRS Dytyatky
Energodar
Energodar
Energodar
Energodar
Korogodske forestry,sq.11
Korogodske forestry
sq. 41
Kyiv
Kyiv
Kyiv
Kyiv
Kyiv
Kyiv
Kyiv
Kyiv
Kyiv

UkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraine04/04/2020
09/04/2020
09/04/2020
15/04/2020
18/04/2020
21/04/2020
29/03/2020
29/03/2020
03/04/2020
08/04/2020
13/04/2020
10/04/2020
12/04/2020
04/04/2020
07/04/2020
10/04/2020
13/04/2020
17/04/2020
13/04/2020
13/04/2020
07/04/2020
29/03/2020
29/03/2020
03/04/2020
08/04/2020
08/04/2020
13/04/2020
13/04/2020
06/04/2020
13/04/2020
14/04/2020
15/04/2020

09/04/2020
15/04/2020
15/04/2020
21/04/2020
18/04/2020
21/04/2020
03/04/2020
03/04/2020
08/04/2020
13/04/2020
20/04/2020
10/04/2020
12/04/2020
07/04/2020
10/04/2020
13/04/2020
16/04/2020
17/04/2020
13/04/2020
13/04/2020
07/04/2020
03/04/2020
03/04/2020
08/04/2020
13/04/2020
13/04/2020
20/04/2020
13/04/2020
13/04/2020
21/04/2020
21/04/2020
22/04/2020

Cs-137
Cs-137
Sr-90
Cs-137
Cs-137
Cs-137
Cs-137
Sr-90
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Sr-90
Cs-137
Cs-137
Sr-90
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137

77
500
140
940
190
3300
14
8,6
36
370
400
2600
290
33
380
290
66
2400
180000
370
9400
7,3
1,6
54
89
63
200
89
8,5
33
21
29

Ukraine12/04/2020

12/04/2020

Cs-137

43000

Ukraine12/04/2020

12/04/2020

Cs-1371600

UkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraine27/03/2020
08/04/2020
10/04/2020
11/04/2020
12/04/2020
16/04/2020
06/04/2020
08/04/2020
09/04/2020

06/04/2020
09/04/2020
11/04/2020
12/04/2020
13/04/2020
17/04/2020
08/04/2020
09/04/2020
11/04/2020

Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137

25,2
290
567
185
57
236
48,4
126
477

8

Kyiv
Kyiv
Kyiv
Kyiv
Kyiv
Kyiv
Kyiv
Kyiv
Kyiv
Kyiv
Maryanivka
Naftobaza
Naftobaza
Naftobaza
Naftobaza
Netishyn
Netishyn
Netishyn
Netishyn
Netishyn
OdessaOdessaOvruch Control
Checkpoint
Ryabokoneve
Ryabokoneve
Ryabokoneve
Ragivka
Ritchtza
SnovskSnovskStara Krasnitza
Varash
Varash
Varash
Varash
Varash
Varash
Varash
Varash
Varash
Varash
Varash
VarashVolya

UkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraine11/04/2020
13/04/2020
14/04/2020
15/04/2020
16/04/2020
17/04/2020
18/04/2020
17/04/2020
21/04/2020
24/04/2020
05/04/2020
29/03/2020
03/04/2020
08/04/2020
13/04/2020
05/04/2020
06/04/2020
06/04/2020
11/04/2020
12/04/2020
09/04/2020
12/04/2020

13/04/2020
14/04/2020
16/04/2020
16/04/2020
17/04/2020
18/04/2020
19/04/2020
21/04/2020
24/04/2020
27/04/2020
05/04/2020
03/04/2020
08/04/2020
13/04/2020
21/04/2020
06/04/2020
07/04/2020
07/04/2020
12/04/2020
13/04/2020
12/04/2020
15/04/2020

Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Sr-90
Cs-137
Cs-137
Cs-137
Cs-137

94,3
39,2
32,5
76
114
124
78
135
40,4
18,8
310
190
410
8300
3800
14,5
42,5
8,66
13,5
14,7
48
77

Ukraine07/04/2020

07/04/2020

Cs-137960

UkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraine31/03/2020
07/04/2020
14/04/2020
04/04/2020
21/04/2020
09/04/2020
12/04/2020
21/04/2020
30/03/2020
05/04/2020
06/04/2020
06/04/2020
07/04/2020
08/04/2020
09/04/2020
10/04/2020
11/04/2020
12/04/2020
13/04/2020
14/04/2020
02/04/2020

07/04/2020
14/04/2020
21/04/2020
04/04/2020
21/04/2020
12/04/2020
15/04/2020
21/04/2020
05/04/2020
06/04/2020
07/04/2020
07/04/2020
08/04/2020
09/04/2020
10/04/2020
11/04/2020
12/04/2020
13/04/2020
14/04/2020
21/04/2020
09/04/2020

Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Sr-90
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137

5,11
53
17
910
1200
52
41
8200
4,45
13,5
61,1
11,1
15,8
12,7
4,73
8,86
14,5
19,4
2,88
6,73
1,53

9

VolyaVRP-750
VRP-750
VRP-750
VRP-750
VRP-750
VRP-750
Yasen
Yuzhnoukrainsk
Yuzhnoukrainsk
Yuzhnoukrainsk
Yuzhnoukrainsk
Yuzhnoukrainsk
Yuzhnoukrainsk
Yuzhnoukrainsk
Yuzhnoukrainsk
Yuzhnoukrainsk
Yuzhnoukrainsk
Yuzhnoukrainsk
Yuzhnoukrainsk
Yuzhnoukrainsk
Yuzhnoukrainsk
Zhovtneve

UkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraineUkraine09/04/2020
29/03/2020
29/03/2020
03/04/2020
08/04/2020
08/04/2020
13/04/2020
05/04/2020
31/03/2020
02/04/2020
06/04/2020
07/04/2020
08/04/2020
09/04/2020
10/04/2020
14/04/2020
15/04/2020
16/04/2020
17/04/2020
21/04/2020
21/04/2020
14/04/2020
04/04/2020

10

16/04/2020
03/04/2020
03/04/2020
08/04/2020
13/04/2020
13/04/2020
20/04/2020
05/04/2020
07/04/2020
09/04/2020
10/04/2020
13/04/2020
15/04/2020
16/04/2020
17/04/2020
21/04/2020
22/04/2020
23/04/2020
24/04/2020
27/04/2020
28/04/2020
21/04/2020
04/04/2020

Cs-137
Cs-137
Sr-90
Cs-137
Cs-137
Sr-90
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137
Cs-137

81,2
390
71
630
1400
240
10000
1300
8,27
17,5
14,5
49,5
75
92,4
89,6
18,4
24,7
27,6
30
11,5
15,9
24
3600