The NP-1000 and NPP-1000 are
advanced design analog neutron monitoring safety channels already
in use at many research reactor installations worldwide. With
the addition of local digital displays their versatility and
capabilities have been further enhanced. Existing NP-1000 and
NPP-1000 channels can be easily upgraded to incorporate the digital
displays.
All NP-1000 channels feature current mode analog circuitry for
percent power and pulse power monitoring (NPP-1000 only) using
signals generated by a self-powered, in-core detector or an ionization
chamber. They include a built-in pulse integrator circuit and
circuits for operational testing and calibration. NP-1000 channels
may also be used to monitor temperature and other parameters
using appropriate transducer signals. Built in safety trip circuits
connect to computer analysis systems and/or hard-wired scram
systems.
The integrity of NP-1000 output signals is assured by the use
of isolation devices. Input signals from as low as 10-9 A
to 10-3 A are accommodated. Gain adjustments are manual
and range selection either manual or computer controlled. The
unit can be configures in a compact NEMA-12 enclosure that can
be mounted horizontally or vertically.
SPECIFICATIONS
NP-1000 LOG ANALOG
SAFETY CHANNEL
INPUT
RANGE
10-9 A(min) to
10-3 A (max)
INPUT
SENSITIVITIES
10-3 A, 10-4 A,
10-5 A, & 10-7 A
OUTPUT
FUNCTIONS & TRIPS
NV (power or flux)
NVT (energy or total flux)
0 (temperature)
HV (high voltage power status)
OUTPUT
RESPONSE TIME
25 msec at 2 x 10-7 A
OUTPUT
SCALES
0 - 10 V, 0 - 20 mA, & 4 - 20 mA (all with 2500 V
isolation)
