skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Regulatory Review of the Digital Plant Protection System for Advanced Power Reactor 1400

Abstract

This paper presents the evaluation result and the regulatory approach of digital plant protection system (DPPS) for Advanced Power Reactor (APR-1400). Firstly, we discuss the issue associated with the integration of bistable processor (BP) and local coincidence logic processor (LCLP) as one of design changes over digital plant protection system. Secondly, regulatory approach is presented on the safety classification and the independence of the soft controller to be installed in digital engineered safety features actuation system (DESFAS). Finally, hardwired back up systems against common mode failure of a digital system and the safety classification of Remote Shutdown Panel (RSP) are described. (authors)

Authors:
; ; ; ; ;  [1]
  1. Dept. of Instrumentation and Control, Korea Institute of Nuclear Safety, Ku Sung Dong 19, Yusung Ku, Daejeon City, 305-600 (Korea, Republic of)
Publication Date:
Research Org.:
American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
OSTI Identifier:
21167958
Resource Type:
Conference
Resource Relation:
Conference: ICAPP'02: 2002 International congress on advances in nuclear power plants, Hollywood, FL (United States), 9-13 Jun 2002; Other Information: Country of input: France; 7 refs
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; CLASSIFICATION; DESIGN; DIGITAL SYSTEMS; EVALUATION; FAILURES; POWER REACTORS; REVIEWS; SAFETY; SHUTDOWN

Citation Formats

Kim, DAI. I., Ji, S.H., Park, H.S., Kim, B.R., Kang, Y.D., and Oh, S.H.. Regulatory Review of the Digital Plant Protection System for Advanced Power Reactor 1400. United States: N. p., 2002. Web.
Kim, DAI. I., Ji, S.H., Park, H.S., Kim, B.R., Kang, Y.D., & Oh, S.H.. Regulatory Review of the Digital Plant Protection System for Advanced Power Reactor 1400. United States.
Kim, DAI. I., Ji, S.H., Park, H.S., Kim, B.R., Kang, Y.D., and Oh, S.H.. 2002. "Regulatory Review of the Digital Plant Protection System for Advanced Power Reactor 1400". United States. doi:.
@article{osti_21167958,
title = {Regulatory Review of the Digital Plant Protection System for Advanced Power Reactor 1400},
author = {Kim, DAI. I. and Ji, S.H. and Park, H.S. and Kim, B.R. and Kang, Y.D. and Oh, S.H.},
abstractNote = {This paper presents the evaluation result and the regulatory approach of digital plant protection system (DPPS) for Advanced Power Reactor (APR-1400). Firstly, we discuss the issue associated with the integration of bistable processor (BP) and local coincidence logic processor (LCLP) as one of design changes over digital plant protection system. Secondly, regulatory approach is presented on the safety classification and the independence of the soft controller to be installed in digital engineered safety features actuation system (DESFAS). Finally, hardwired back up systems against common mode failure of a digital system and the safety classification of Remote Shutdown Panel (RSP) are described. (authors)},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2002,
month = 7
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • As the current fleet of nuclear power plants in the US reaches 25+ years of operation, obsolescence is driving many utilities to implement upgrades to both their safety and non-safety-related Instrumentation and Control (I and C) Systems. Digital technology is the predominant replacement technology for these upgrades. Within the last 15 years, digital control systems have been deployed in non-safety- related control applications at many utilities. In addition, a few utilities have replaced small safety-related systems utilizing digital technology. These systems have shown digital technology to be robust, reliable and simpler to maintain. Based upon this success, acceptance of digitalmore » technology has gained momentum with both utilities and regulatory agencies. Today, in an effort to extend the operating lives of their nuclear stations and resolve obsolescence of critical components, utilities are now pursuing digital technology for replacement of their primary safety systems. AREVA is leading this effort in the United States with the first significant digital upgrade of a major safety system. AREVA has previously completed upgrades to safety-related control systems emergency diesel engine controls and governor control systems for a hydro station which serves as the emergency power source for a nuclear station. Currently, AREVA is implementing the replacement of both the Reactor Protection System (RPS) and the Engineered Safety Features Actuation System (ESFAS) on all three units at a US PWR site. (authors)« less
  • Reactor Protection Systems (RPS) in nuclear power plants will need to be replaced with new digital systems when the existing analog systems have reached the end of their operational lifetime. These systems must be cost-effective, reliable and offer the opportunity for operational and maintenance improvements.
  • Since the completion of construction of Ulchin Nuclear Power Plant Units 3 and 4 (UCN 3 and 4), the first units of the OPR (Optimized Power Reactor) series, various advanced design features have been incorporated to the following OPRs. The Ulchin Nuclear Power Plant Units 5 and 6(UCN 5 and 6) which started commercial operation in Korea from 2004 and 2005 respectively, are designed to provide improvements in safety, reliability and costs by applying both advanced proven technology and experiences gained from the construction and operation of the previous OPRs. Among those improvements, the digital plant protection system (DPPS) andmore » the digital engineered safety feature actuation system (DESFAS) are the key elements to the UCN 5 and 6 designs. The DPPS and DESFAS utilizing the digital computer technology offer a solution to the obsolescence problem of analog system. These features also provide the potential for additional benefits such as ease of maintenance, increased performance, reduction of internal and external cross channel wiring, improvement of the surveillance testability and flexibility of control logic programming change. During the initial design stage, the Korean regulatory body had evaluated these design concepts intensively and concluded it to be acceptable for the safety point of view. Also, in-depth review on the detailed design and the special evaluation/audit for the software design process has been performed to secure the quality of the software. As a result, every issue raised during licensing review has been clarified and the operating licenses for the UCN 5 and 6 were issued in October, 2003 and October, 2004 respectively, by the government. In this paper, design characteristics of the UCN 5 and 6 are introduced, and advanced design features and implementation process are presented focused on the DPPS/DESFAS with some benefit analysis results. (authors)« less
  • In the last five years combined cycle power plants have gained an increasing market mainly due to their high efficiency, the short construction period and the relatively low capital investment. In order to operate the plant in safe condition, with a high reliability and low costs both in commissioning and in operation, according to the authors` experience the steam turbine needs a control and protection system with following characteristics: based on digital reliable technology, easily programmable, equipped with a functionally modular software, very precise PID both in transient and in steady state conditions, and simple to operate due to themore » high degree of automation. A typical example of one of authors` company control and protection system for combined cycle steam turbine is the application for S.Quirico cogeneration power plant in Italy ordered by Edison (italian IPP). The first start-up has been carried out successfully on February 1996, full load has been reached at the beginning of March.« less
  • This six-volume report contains 156 papers out of the 175 that were presented at the Fourteenth Water Reactor Safety Information Meeting held at the National Bureau of Standards, Gaithersburg, Maryland, during the week of October 27-31, 1986. The papers are printed in the order of their presentation in each session and describe progress and results of programs in nuclear safety research conducted in this country and abroad. Foreign participation in the meeting included thirty-four different papers presented by researchers from Canada, Czechoslovakia, Finland, Germany, Italy, Japan, Mexico, Spain, Sweden, Switzerland and the United Kingdom. The titles of the papers andmore » the names of the authors have been updated and may differ from those that appeared in the final program of the meeting.« less