Accident and post-accident monitoring system
The PAMS accident and post-accident monitoring system is intended for monitoring of safety parameters and state of reactor facility’s systems during design and beyond-design accidents.
PAMS implements functions of accident and post-accident monitoring at any design-relevant initial events, as well as beyond-design accidents (including those connected with severe damage of fuel).
Functions of PAMS:
- monitoring the following RF parameters with the use of emergency measuring instrumentation (EMI):
- level of coolant in a reactor;
- level in a cooling pond;
- temperature in a cooling pond;
- temperature in a containment;
- containment radiation dose rate;
- pressure above a core;
- pressure in an accident confinement area;
- level in containment sumps;
- providing operating personnel of NPP and emergency work headquarters with information on state of main safety functions and reactor facility’s systems with the help of hardware resistant to emergency conditions, as well as data received from standard systems if they keep their operability;
- providing information on state and efficiency of protective barriers based on direct readings of EMI when standard monitoring systems fail during beyond-design accidents.
System advantages:
High failure tolerance
Use of hardware qualified for conditions of design and beyond-design accidents,
Use of AKIP with an advanced measurement
Assurance of PAMS operability
Other solutions for nuclear power plants
Process information system (unit’s upper level)
Central control system for the NPP power unit which provides visualization, registration and documentation of technological process parameters in all operating modes of the power unit, control of critical functions and basic safety parameters.
Normal operation control systems for reactor and turbine divisions
The systems are designed to control normal operation control of NPP units’ technological systems.
In-core monitoring system
The in-core monitoring system assures monitoring of neutron-physical and thermohydraulic parameters of a reactor facility’s (RF) primary circuit and information support to an operator.
System to monitor boron-10 isotope (boric acid) concentration
The main function of the boron concentration monitoring system based on neutron solution analyzers NAR-I – automatic continuous measurement of boron-10 (boric acid) concentration in coolant at NPP power units with WWER-type reactors.
Safety control system technological
The system is designed to initiate actuation and control of the power units’ safety systems.
Neutron flux monitoring system
The system is a part of a control and protection system (SUZ) of NPP power units.