Response Analysis on Electrical Pulses under Severe Nuclear Accident Temperature Conditions Using an Abnormal Signal Simulation Analysis Module

Science and Technology of Nuclear Installations. 2012;2012 DOI 10.1155/2012/656590

 

Journal Homepage

Journal Title: Science and Technology of Nuclear Installations

ISSN: 1687-6075 (Print); 1687-6083 (Online)

Publisher: Hindawi Publishing Corporation

LCC Subject Category: Technology: Electrical engineering. Electronics. Nuclear engineering

Country of publisher: Egypt

Language of fulltext: English

Full-text formats available: PDF, HTML, ePUB, XML

 

AUTHORS

Kil-Mo Koo (Severe Accident and PHWR Safety Research Division, Korea Atomic Energy Research Institute, 150 Dukjin-dong, Yusong-gu, Daejeon 305-353, Republic of Korea)
Jin-Ho Song (Severe Accident and PHWR Safety Research Division, Korea Atomic Energy Research Institute, 150 Dukjin-dong, Yusong-gu, Daejeon 305-353, Republic of Korea)
Sang-Baik Kim (Severe Accident and PHWR Safety Research Division, Korea Atomic Energy Research Institute, 150 Dukjin-dong, Yusong-gu, Daejeon 305-353, Republic of Korea)
Kwang-Il Ahn (Integrated Safety Assessment Division, KAERI, 150 Dukjin-dong, Yuseong-gu, Daejeon 305-353, Republic of Korea)
Won-Pil Baek (Nuclear Safety Research Headquarter, KAERI, 150 Dukjin-dong, Yuseong-gu, Daejeon 305-353, Republic of Korea)
Kil-Nam Oh (Department of Optical Communications Engineering, Gwangju University, 52 Hyuodeok-ro, Nam-gu, Gwangju 503-703, Republic of Korea)
Gyu-Tae Kim (Department of Electrical Engineering, Korea University, 5ka, Anam-dong, Sungbuk-ku, Seoul 136-701, Republic of Korea)

EDITORIAL INFORMATION

Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 22 weeks

 

Abstract | Full Text

Unlike design basis accidents, some inherent uncertainties of the reliability of instrumentations are expected while subjected to harsh environments (e.g., high temperature and pressure, high humidity, and high radioactivity) occurring in severe nuclear accident conditions. Even under such conditions, an electrical signal should be within its expected range so that some mitigating actions can be taken based on the signal in the control room. For example, an industrial process control standard requires that the normal signal level for pressure, flow, and resistance temperature detector sensors be in the range of 4~20 mA for most instruments. Whereas, in the case that an abnormal signal is expected from an instrument, such a signal should be refined through a signal validation process so that the refined signal could be available in the control room. For some abnormal signals expected under severe accident conditions, to date, diagnostics and response analysis have been evaluated with an equivalent circuit model of real instruments, which is regarded as the best method. The main objective of this paper is to introduce a program designed to implement a diagnostic and response analysis for equivalent circuit modeling. The program links signal analysis tool code to abnormal signal simulation engine code not only as a one body order system, but also as a part of functions of a PC-based ASSA (abnormal signal simulation analysis) module developed to obtain a varying range of the R-C circuit elements in high temperature conditions. As a result, a special function for abnormal pulse signal patterns can be obtained through the program, which in turn makes it possible to analyze the abnormal output pulse signals through a response characteristic of a 4~20 mA circuit model and a range of the elements changing with temperature under an accident condition.