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APPENDIX IV 101
T A B L E X X L
D IR E C T M E A SU R E M E N T O F RA D IA TIO N
Monitoring system Measured quantity Evaluation
Number o f
measuring points
GM field stations
Detectors:
BZ 120
Continuous scaling
o f detector pulses;
interrogation of
binary coded scaler
(6 + y)"lev el;
Mean pulse rate
between interrogations
Monthly average
o f count rates of
daily interrogations
and m inim um /
maximum interrogation
values
8
contents by
telephone
GM monitor system
for site monitoring
Detectors:
y-dose rate
Reporting only
when warning or
alarm threshold is
exceeded
BZ 120 or
Valvo 18529 with
energy compensation
filter
Warning threshold 1 mR/h 20
Warning threshold 100 mR/h ■ 5
GM monitor system
for WAK site
monitoring
Detectors:
BZ 120
without energy
compensation filter
(0 + y)-radiation
level
Reporting only
when monitoring
threshold is
exceeded
6
Monitoring threshold at 10 times the background Ro
(R