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Perform five measurements of external background EDR and register the received readings
in the protocol.
Place the holder together with the dosimeter in the position, where DER from
is 0.8 µSv/h. Perform five measurements of DER.
Register the received readings in the protocol.
Calculate the DER value
where
external gamma background in µSv/h;
gamma background measurement in µSv/h.
H
*
in µSv/h according to the formula (1).
(
10
)
*
*
H
H
(
10
)
(
10
- is an average value of the dosimeter readings of source and
*
H
(
10
)
H
*
(
10
)
- is an average value of the dosimeter readings during external
Ф
,
*
H
)
(
10
)
Ф
47
137
Cs source
(1)
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