Toshiba is now planning the application of this modular design method for every digital control system. These qualified software modules will be applied to next system and will realize highest reliability and least cost. In addition, software, has been produced and tested according to the functional module. This remarkable reduction of design work has enhanced reliability with less cost. In this application the design work has been reduced to 30 percent by reusing of functional module which was first developed in former applications. Toshiba firstly applied modular design method to fuel handling machine control system. To keep reliability and reduce cost by software reuse, Toshiba adopts modular design of control software, where standard part is designed as a set of standard functional modules and variable function is designed as a complex of standard functional modules and plant unique modules. However, this design approach is not always effective because standard function may be changed by customer and nothing is considered for variable part even if it is large. Even in current design, standard design is preserved to be reused in next application. Standard function may be common to every plant while variable function should be designed for each plant. The function of control systems can be divided in standard part and variable part. In introduction of digital technology, it is most important to restrict unnecessary flexibility of software. However, its high performance and flexibility may result in too complicated software structure, which will cause long design time and long testing time and increase cost. Digital technology has many advantages compared with analog technology. Especially in Japanese BWRs, control systems are being digitized both in constructing plant and in retrofit of operating plants. The modular design method for digital control systems in Japanese BWRsĭigital technology is being applied to control systems in nuclear power plants. The book covers not only the syntax and limitations of HDL coding, but deals extensively with design problems such as partitioning and synchronization, helping you to produce designs that are not only logically correct, but will actually In addition to covering the syntax of Verilog and SystemVerilog, the author provides an appreciation of design challenges and solutions for producing working circuits. (Orig./CB) [deĭigital integrated circuit design using Verilog and SystemVerilogįor those with a basic understanding of digital design, this book teaches the essential skills to design digital integrated circuits using Verilog and the relevant extensions of SystemVerilog. Digital instrumentation and control systems simply work very differently from conventional control systems, so that this testing modality is inevitable. Another insight is that design qualification of digital instrumentation and control systems must include plant-independent systems tests. The hardware design type qualification proved that the hardware as a substrate of functionality and reliability is an issue that demands full attention, as compared to conventional systems. Design type qualification of the software, a premiere, could be performed unexpectedly smoothly. It has likewise become clear that the systematics of design type qualification of the hardware components is also applicable to the software components. Experience shows that the concepts discussed, derived from codes, guidelines and standards, achieve useful results. The design type qualification of digital safety instrumentation and control is outlined. International Nuclear Information System (INIS) Design type testing for digital instrumentation and control systems
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