Place of sampling

Service life of the deposit

Global beta activity

⁴⁰K

¹³⁷Cs

²²⁶Ra

²²⁸Th (²²⁸Ac)

filter 7

15 years

4492

2807

285

290

628

filter 9

15 years

5419

3540

359

274

803

filter 1

24 years

4992

3684

374

343

911

Reserve sand

0

192

109.3

7

61

32