Table 1.
Yearly average mine concentration of 222Rn for the Jáchymov region
222Rn concentration in pCi/l | WL | Measurementsa | Minesb | |||
---|---|---|---|---|---|---|
Year | Mean | S.D. | Range | Estimated | N | N |
1924 | 2982.1 | 2858.1 | 291–8954 | 26.3 | 12 | 2 |
1928 | 4138.7 | 3273.5 | 633–7116 | 36.6 | 3 | 1 |
1930 | 2816.7 | 2077.6 | 0–7728 | 24.9 | 70 | 3 |
1932 | 613.5 | 504.1 | 36–1965 | 3.3 | 36 | 3 |
1933 | 223.3 | 213.7 | 0–659 | 1.2 | 15 | 1 |
1934 | 839.4 | 496.3 | 36–2293 | 4.5 | 33 | 3 |
1948 | 2000 | 17.7 | >308 | 7 | ||
1949 | 1016.3 | 607 | 466–1913 | 9 | 1476 | 7 |
1950 | 1058.6 | 401.7 | 533–1547 | 9.4 | 4113 | 7 |
1951 | 889.6 | 499.9 | 248–1336 | 4.8 | 453 | 5 |
1952 | 401.5 | 168 | 111–629 | 2.2 | 308 | 14 |
1953 | 520.3 | 171.9 | 326–818 | 2.8 | 2750 | 12 |
1954 | 425.9 | 117.7 | 233–659 | 2.3 | 3639 | 15 |
1955 | 397.3 | 144.9 | 215–625 | 2.1 | 4331 | 12 |
1956 | 389.6 | 216.5 | 104–810 | 2.1 | 3539 | 11 |
1957 | 344.3 | 147.2 | 71–515 | 1.9 | 771 | 11 |
1958 | 188.9 | 152.9 | 20–437 | 1 | 996 | 10 |
1959 | 402.4 | 215.4 | 85–710 | 2.2 | 685 | 9 |
1960 | 342.5 | 248 | 85–760 | 1.9 | 573 | 8 |
1961 | 270 | - | - | 1.5 | - | 2 |
1962 | 300 | - | - | 1.6 | - | 1 |
Total number of measurements on which the mine means were based.
Number of mine averages on which the presented means are based.
For year 1948 the value from 1950 was assigned