Protection & Safety When It Counts
Discrete Logic Solving System (DLSS™) protects nuclear power plants by monitoring, calculating and actuating protective elements to ensure safety measures are operational when needed.
DLSS is a non-digital system implemented in custom hardware-based logic that has a familiar PLC-like form, fit, and function. DLSS operates without FPGA, microcontroller or microprocessor running software.
A Unique Non-Digital Design Approach
DLSS offers a hardware-based architecture, solid-state electronics, analog and discrete logic circuits; and a simple configuration of common input/output modules and application-specific logic solving modules. Platform configuration (input/output distribution) is strategically defined to maximize availability (minimize downtime) of the critical functions.
- Non-digital, hardware-based architecture
- Triple Modular Redundancy (TMR) for fault tolerance
- Built-In Test (BIT) to detect faults
- Hot Standby and Hot Swap Capabilities
- Decentralized BIT isolates faults to Lowest Replaceable Unit (LRU)
- Superior reliability through stringent derating criteria
- Visual indicators at the LRU-level to report faults
- Common platform approach reusable/ deployable to multiple applications
- Long service life with decades of product support
No software-like features avoid complexity & licensing risks associated with digital I&C make DLSS significantly less complex than general purpose platforms (e.g. PLCs).
Safe, Reliable System
Modern analog electronics enhance safety, reliability and efficiency while eliminating the risk of software common-cause failure. DLSS is designed, qualified and produced under a 10 CFR 50 Appendix B Quality Assurance Program.
The DLSS modular design can be integrated with new and retrofit applications and supports system diversity.