MyRIAM
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Manual_Myriam_EN_10-04-08.doc
(c) SARAD GmbH
For example, choosing an integration interval of one hour results in strongly reduced
detection limits and gives still a good possibility for a chronological (and therefor also local)
assignment of dose contributions.
The immediate alert function (1-Minute basic interval) is not affected by any setting of the
integration interval. The resulting limits for a 60 Minutes integration interval are stated below:
Fig. 2 Detection Limit/Threshold (3
) for T
i
= 60 min
After finishing the observation period (e.g. one month), the inhalation dose for the whole
period can be determined by using the filter analysis mode. Because the pump is not
running, the influence of Radon daughters becomes negligible and the collected activity is
stable over the analysis period.
Channel
ALPHA
BETA
Analysis Period
Exposure
[Bqh/m³]
Dose (Pu-239)
[mSv]
Exposure
[Bqh/m³]
Dose (Sr-90)
[mSv]
8 hours
0,083
0,0036
0,083
0,000012
12 hours
0,056
0,0024
0,056
0,000008
24 hours
0,028
0,0012
0,028
0,000004
Tab. 1 Detection Limits (3
) for filter analysis mode