3 Specifications
Table 3.1
- gamma
CsI(Tl) scintillator
3
- for PM1710A, PM1710C
- for PM1710GNA, PM1710GNC
5 cps/(µR/h) (500 cps/(µSv/h)) – for 241Am;
5 cps/(µR/h) (500 cps/(µSv/h)) – for 137Cs;
2 cps/(µR/h) (200 cps/(µSv/h)) – for 60Co;
3 cps/(µR/h) (300 cps/(µSv/h)) – for 241Am;
3 cps/(µR/h) (300 cps/(µSv/h)) – for 137Cs;
2 cps/(µR/h) (200 cps/(µSv/h)) – for
60
3.3 Neutron Sensitivity(only for PM1710GNA, PM1710GNC)
0.1 (counts⋅cm2)/neutron – for Pu-α-Be;
7.0 (counts⋅cm2)/neutron – for thermal neutrons;
1.0 (counts⋅cm2)/neutron – for Pu-α-Be on
a
phantom or in the moderator chamber
3.4 Energy Range of gamma radiation:
- for PM1710A, PM1710C
- for PM1710GNA, PM1710GNC
from 0.045 to 3.0 МeV;
3.5 Energy Range of neutron radiation
(only for PM1710GNA, PM1710GNC)
from thermal to 14.0 МeV
3.6 Mean neutron count rate indication range
(only for PM1710GNA, PM1710GNC)
from 001 to 999 s-1
3.7 Photon radiation indication range
from 1 to 3000 µR/h (from 0.01 to 30 µSv/h)
3.8 Accuracy of DER indication (at 137Cs) in the range
of 0.1 – 20 µSv/h (10 – 2000 µR/h), no less than ±(20 + К/
) %; where
– is
the indicated DER,
К– a coefficient of 1 µSv/h
3.9 At preset coefficient n = 4.5 of gamma channel
(number of mean-square deviation of current
radiation background) and gamma-radiation
background level is no more than 0.25 µSv/h, the
monitor should detect gamma radiation sources and
samples from nuclear materials according to Table 3.2
below with the probability more than 0.5
According to the Russian standard P 51635
II HY20
3.10 At preset coefficient nof neutron channel (number
of mean-square deviation of current radiation
background) at which the false alarms rate is no more
than 1 per 10 min, the monitor in the chamber-
moderator should detect neutron radiation sources 252Cf
with flux density 1.5⋅104s-1 and moving speed 0.5 m/s
at the distance 1 m from the monitor effective center
with the probability more than 0.5
(only for PM1710GNA, PM1710GNC)
According to the Russian standard P 51635
IY Hn100
3.11 False alarms rate in the gamma radiation
detection mode at the level of radiation background
not more than 25 µR/h (0.25 µSv/h) with gamma
channel coefficient
n=5.3
n=4.5
no more than 1 per 10 hours of continuous
operation;
no more than 1 per 10 minutes of continuous
3.12 False alarms rate in the neutron radiation
detection mode with neutron channel coefficient
n=5.0
n=4.0
(only for PM1710GNA and PM1710GNC)
no more than 1 per 10 hours of continuous
operation;
no more than 1 per 10 minutes of continuous
