Owner's manual

Featuring:
radiation monitoring
systems
A Mirion Technologies Division
SGLM 202K
Special Monitors
SGLM 202K
Steam Generator Leak Rate Monitor
The SGLM 202K from the RAMSYS product line has
been developed for steam generator leak rate
monitoring in WWER nuclear power plants.
The
16
N volume activity (in counts per second/Cps)
measured by a NaI scintillation detector inside a lead
shielding facing the live steam line is converted to
Bq/m
3
(or µci/cc) through a coef cient calculated
from Monte Carlo analysis on the basis of relevant
data provided by the user. An algorithm which is
based upon thermal hydraulic transport phenomena
modeling uses the measured
16
N activity, the reactor
power, the steam  ow rate and the transport time
(in the primary and in the secondary loop) to assess
the steam generator leak rate.
APPLICATIONS
• Barrier leak control
○ Secondary circuit monitoring
RELATED MONITORS
• SGLM 201K: version for PWR nuclear power plants
FEATURES
●
16
N monitoring when reactor power exceeds 25%
● Gross gamma energy monitoring when reactor
power < 25%
● Spectrum stabilization against temperature and aging
drifts
● 16 selectable windows over the range covered
● 1024 channels analysis
● Available with or without display and local signaling
● Seismically quali ed
● More than 500 SGLM channels in operation worldwide
● De ned for mild environment conditions