Doza DKG-05D Bedieningshandleiding - Pagina 12
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correspondence of the dosimeter set;
-
operational documentation presence;
-
absence of defects affecting on dosimeter operation;
-
presence of previous verification marks.
4.5.2 Testing
Dosimeter testing is done according to 2.2.1 operations.
4.5.3 Assessment of relative
4.5.3.1 For verification to be performed, the УДГП-1М type installation or similar device
which is certified for
to 100 mSv/h and 100 to 3000 mSv/h with
Notes
1
To protect the operator caring out verification against the overexposure, information is read using
remote video camera or other optical device (for example, binoculars) to exclude the operator exposure
to radiation field of the source.
2
Verification test is not performed in the whole range of
verification test in two points and rate of
4.5.3.2 Place the phantom on the verification installation so that the phantom plane is
perpendicular to radiation incidence.
When measuring, the dosimeter should be closely placed on the phantom side faced to the
radiation source. The dosimeter clip should be faced to the radiation source and the detector
center (its projection is marked in the casing – see Annex А) should be on the line which
connects the radiation source with the phantom surface center.
4.5.3.3 Perform rate of
4.5.3.4 Relative error assessment under rate of
done for rate of
10
p
4.5.3.5 Relative error assessment under
10
values of 0,4-0,5 mSv/h and 1-1,2 Sv/h. Exposure time should not be less than 200 s.
p
4.5.3.6 At least, five rate of
conditionally true value of rate of
true value of dose,
Н
should be calculated.
4.5.3.7 Minimal and maximal measured values of rate of
determined.
4.5.3.8 Calculate relative differences (%) by following formulae:
4.5.5.9 Verification test results are positive, if no one value of errors in absolute
magnitude does exceeded the value given in 1.2.4.
Н
10
p
10
gamma radiation within the error of 5 % in the ranges of 0,1
rate of
p
Н
10
and
p
values of 0.1, 50, 500, 3000 mSv/h.
10
p
Н
(
10
)
р
оi
(
10
)
, according to 4.5.3.5 and average values of measured parameters
р
оi
100
[
(
10
р
100
[
(
10
р
100
[
(
10
р
100
[
(
10
р
measurement error
10
(rate of
p
137
Cs sources should be used.
Н
10
p
10
in the whole measurement range.
p
10
measurements according 2.2 and 2.3.
p
10
p
Н
10
measurement mode should be done for
p
measurements should be done,
, according to 4.5.3.4 and
)
(
10
)
/ ]
(
10
oi
р
i
min
р
)
(
10
)
/ ]
(
10
oi
р
i
max
р
)
(
10
)
/ ]
(
oj
р
j
min
р
)
(
10
)
/ ]
(
oj
р
j
max
р
ФВКМ.412113.005РЭ
, it is warranted by positive results of
measurement mode should be
Н
(
10
)
р
Н
10
for conditionally
p
Н
10
and
10
p
p
)
oi
)
oi
10
)
oj
10
)
oj
for each
i
should be
(4.1)
(4.2)
(4.3)
(4.4)
12