The system has been designed to maintain existing operator and Reactor Protection System interfaces and contains no high-voltage, coaxial cable, or triaxial cable in the control room.
- Qualified for 1E Safety-Related applications, with 40-year qualified life
- Fission-chamber–based neutron flux monitoring system
- Provides neutron flux measurement from reactor shutdown to reactor full power level or from 10-2nv to 1010nv in a harsh environment
- Designed to measure neutron flux with the detector in a high gamma radiation and electrical noise environment
- Provides reliable measurement before, during and after a design basis event (DBE)
- Signals from the wide-range amplifier are connected to the rack-mount signal processors
- Signal processors are designed to replace existing Source Range and Intermediate Range drawers; can be designed to look similar in appearance to existing equipment to minimize training of plant personnel and changes to plant operating procedures
- Monitors convert signals from the amplifiers into signals that represent the source range count rate, the intermediate range power level, and the rate-of-change of reactor power level; also provide adjustable alarms when the SR or IR levels exceed setpoints
- Source Range and Intermediate Range signal processors are provided in 19 in. rack-mounted enclosures with LCD digital and bar graph meters
Includes: Each Source Range/Intermediate Range channel consists of:
- Wide range detector assembly (with integral cable)
- Junction box
- In-containment cable assembly (from junction box to inside penetration)
- Amplifier cable assembly (from outside penetration to amplifier)
- Amplifier assembly
- Optical isolator assembly
- Signal processor cables
- Source Range signal processor
- Intermediate Range signal processor
- Shutdown margin monitor assembly
- Wall-mount signal processor assembly
Compliance: Meets U.S. NRC Regulatory Guide 1.97 Post-Accident Monitoring Requirements
