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Liu R.,CNNC China Nuclear Control System Engineering Co. | Li C.-L.,CNNC China Nuclear Control System Engineering Co. | Li Y.-L.,China Nuclear Power Engineering Co.
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2014

Taking the advantages of determining behavior, simple, fast responding time and easy to license, Field-programmable gate arrays (FPGAs) are becoming a more critical component of safety instrument and control (I&C) systems in nuclear plant power (NPP), especially for the next generation. A FPGA based safety I&C production provide a capability to protect against obsolescence and for NPP I&C system and tendentious solution to retrofit. A FPGA-based technology can meet safety and reliability requirement of 3rd generation NPP. With China's rapid development of NPP I&C of third generation AP1000 technology, the autonomy of NPP "nervous system" digital control system (DCS) pay more and more people's attention. However, both purchaser and national safety regulators require rigorous verification and validation (V&V) for the FPGA based safety I&C system to ensure that the FPGA based safety I&C production has high safety and reliability. This paper Investigates the lift cycle model, V&V standard system, V&V activity and mmethodology for NPP safety I&C. simulation and testing technology of V&V activity also be presented in the paper.


Liu R.,CNNC China Nuclear Control System Engineering Co. | Li Y.-L.,China Nuclear Power Engineering Co.
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2014

Taking the advantages of good stability and high reliability, digital communication are becoming a more critical component of instrument and control (I&C) systems in nuclear plant power (NPP), especially for the next generation. With China's rapid development of NPP I&C of third generation AP1000 technology, most of Nuclear Detecting Instrument System (NDIS) are supplied by foreign manufacturer and digital NDIS is unavailable in China. In the digital control system design customized for field nuclear instrument, all parts need to be taken into account for signal acquisition, processing, threshold comparison and control. Fast and intelligent communication data processing is often of concern and needs research. Transmission algorithm of digital communicating data for NDIS is designed to solve the real-time-control problems in the amount of time and equipment limitation which caused by physical characteristics of RS485 high-speed data bus. The algorithms include data link establishment and link management, data subcontracting computing, and data test. In the case of limited system scan cycle time and multi-exchanged data of digital NDIS, it can guarantee the normal transmission of sufficient data for information of all devices.


Guo Q.,University of Science and Technology Beijing | Hu X.,University of Science and Technology Beijing | Zheng Z.,CNNC China Nuclear Control System Engineering Co.
Advanced Materials Research | Year: 2012

Torque control of hot strip coiler affects the telescopicity of steel coil. The hot yield point of steel is different in different temperature, it affects the bending torque of steel strip, the strip coiling temperature is about 500-700°C,and what obtained through the study of steel hot yield point is that large change of hot yield point happens in every 50 degrees of temperature change. In order to track the load torque accurately, compensation of torque for temperature change is necessary. It can make torque tracking accurately, and improve the telescopicity of steel coil. © (2012) Trans Tech Publications, Switzerland.


Yang D.-G.,CNNC China Nuclear Control System Engineering Co. | Lu S.-T.,CNNC China Nuclear Control System Engineering Co.
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2014

Development process for ZJ230 spherical helium-3 proportional counters is introduced, including operation principle, demand for helium-3 gas, the structural design, neutron sensitivity test, plateau characteristic test, angular response test. ZJ230 is the generic terms of helium-3 spherical counters, including Φ30 mm, Φ50 mm andΦ100 mm three sizes. The spherical helium-3 proportional counters meet the design requirements, they can be used to measure the environmental dose of neutron radiation and neutron energy spectrum.

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