E Sv=y
ð
Þ¼h g
ð Þ Cs137 Â Λ
½ Cs137 Â Iy
ð15:1Þ
where:
h(g) Cs137 is dosimetric coefficient for a given radionuclide (Sv/Bq) at group g of age
(>17 years)
[Λ] Cs137 is radionuclide concentration in food (Bq/kg wm)
Iy is food ingested rate (kg/year) for:
Individ from Population (P) ¼ 10 kg/y;
Individ from Target Group (TG) ¼ 100 kg/y
and for collective dose:
EC man Sv=y
ð
޼Pman  E Sv=y
ð
Þ
ð15:2Þ
where Pman is the number of the inhabitants using aquatic food (fish).
15.3 Results
The measurable radioactivity in fish samples is for natural radionuclide K40 and for
artificial radionuclide Cs137, with results presented in Table 15.1.
Cs137 is distributed between 0.33 and 1.26 Bq/kg wm, and K40 between 36 and
236 Bq/kg wm, with a mean concentration 0,64þ/À0,14 Bq/kg wm, respectively
112.1þ/À48.9 Bq/kg wm. In fish samples, the two radionuclides are positively
correlated, with r ¼ 0.68.
15.4 Discussions
To estimate radiological impact by ingestion, are taken the following data:
– h(g) Cs137 ¼ 1.3E-8 Sv/Bq, h(g)K40 ¼ 6.2E-9 Sv/Bq, in condition of an age
g > 17 year (Basic Norms 2000);
– Inhabitants/Constanta County ¼684.082 (taken only 462.439, Age Group:
15–64 years ¼67,6%) (National Institute of Statistics 2011);
– Inhabitants main cites (70% of populations from county): 477.473 (taken only
322.771, Age Group: 15–64 years ¼67,6%) (National Institute of Statistics
2011);
– The maximum annual total catch of fish recorded in the period 2011–2014 is
369,514 kg (Nicolaev et al. 2015).
Dose results are presented in Table 15.2.
15 Radioactive Content in Fish from Black Sea Caches. Its Impact on. . .
243
ð
Þ¼h g
ð Þ Cs137 Â Λ
½ Cs137 Â Iy
ð15:1Þ
where:
h(g) Cs137 is dosimetric coefficient for a given radionuclide (Sv/Bq) at group g of age
(>17 years)
[Λ] Cs137 is radionuclide concentration in food (Bq/kg wm)
Iy is food ingested rate (kg/year) for:
Individ from Population (P) ¼ 10 kg/y;
Individ from Target Group (TG) ¼ 100 kg/y
and for collective dose:
EC man Sv=y
ð
޼Pman  E Sv=y
ð
Þ
ð15:2Þ
where Pman is the number of the inhabitants using aquatic food (fish).
15.3 Results
The measurable radioactivity in fish samples is for natural radionuclide K40 and for
artificial radionuclide Cs137, with results presented in Table 15.1.
Cs137 is distributed between 0.33 and 1.26 Bq/kg wm, and K40 between 36 and
236 Bq/kg wm, with a mean concentration 0,64þ/À0,14 Bq/kg wm, respectively
112.1þ/À48.9 Bq/kg wm. In fish samples, the two radionuclides are positively
correlated, with r ¼ 0.68.
15.4 Discussions
To estimate radiological impact by ingestion, are taken the following data:
– h(g) Cs137 ¼ 1.3E-8 Sv/Bq, h(g)K40 ¼ 6.2E-9 Sv/Bq, in condition of an age
g > 17 year (Basic Norms 2000);
– Inhabitants/Constanta County ¼684.082 (taken only 462.439, Age Group:
15–64 years ¼67,6%) (National Institute of Statistics 2011);
– Inhabitants main cites (70% of populations from county): 477.473 (taken only
322.771, Age Group: 15–64 years ¼67,6%) (National Institute of Statistics
2011);
– The maximum annual total catch of fish recorded in the period 2011–2014 is
369,514 kg (Nicolaev et al. 2015).
Dose results are presented in Table 15.2.
15 Radioactive Content in Fish from Black Sea Caches. Its Impact on. . .
243