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Paper Abstract and Keywords
Presentation 2005-12-16 13:00
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Kazuo Iwama (TUMST), Tsuneharu Simodaira (InterRisk Research Inst. & Consulting), Yoshinobu Sato, Koichi Suyama (TUMST)
Abstract (in Japanese) (See Japanese page) 
(in English) IEC 61508 regulates requirements for the purpose of achievement of functional safety. This is translated into Japanese as JIS C 0508. In this standard, it is required to examine the relationship between failure rates of SRS (Safety Related System) and reduction of risk. Failures are classified into safe and dangerous failures. If the total failure rate is constant, it is a significant factor to achieve a necessary Safety Integrated Level (SIL) by means of higher safe failure rates. On the other hand, if safety failures bring on EUC (Equipment Under Controlled), it will be possible to have a big economic risk.
From the above viewpoints, the authors study the relationships between safe and dangerous failures as well as the risk reduction achieved by SRS.
Keyword (in Japanese) (See Japanese page) 
(in English) IEC 61508 / Safe Failure / Dangerous Filure / Safe Failure,Safe Failure Fraction / SIL(Safety Integrated Level), / Shutdown / Risk /  
Reference Info. IEICE Tech. Rep., vol. 105, no. 480, R2005-47, pp. 1-4, Dec. 2005.
Paper # R2005-47 
Date of Issue 2005-12-09 (R, SSS) 
ISSN Print edition: ISSN 0913-5685
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Conference Information
Committee R SSS  
Conference Date 2005-12-16 - 2005-12-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) International standards on reliability, safety, reliability, etc. 
Paper Information
Registration To R 
Conference Code 2005-12-R-SSS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) * 
Sub Title (in English) * 
Keyword(1) IEC 61508  
Keyword(2) Safe Failure  
Keyword(3) Dangerous Filure  
Keyword(4) Safe Failure,Safe Failure Fraction  
Keyword(5) SIL(Safety Integrated Level),  
Keyword(6) Shutdown  
Keyword(7) Risk  
Keyword(8)  
1st Author's Name Kazuo Iwama  
1st Author's Affiliation Tokyo University of Marine Science & Technology (TUMST)
2nd Author's Name Tsuneharu Simodaira  
2nd Author's Affiliation InterRisk Research Institute & Consulting, Inc. (InterRisk Research Inst. & Consulting)
3rd Author's Name Yoshinobu Sato  
3rd Author's Affiliation Tokyo University of Marine Science & Technology (TUMST)
4th Author's Name Koichi Suyama  
4th Author's Affiliation Tokyo University of Marine Science & Technology (TUMST)
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Speaker Author-1 
Date Time 2005-12-16 13:00:00 
Presentation Time 25 minutes 
Registration for R 
Paper # R2005-47, SSS2005-26 
Volume (vol) vol.105 
Number (no) no.480(R), no.481(SSS) 
Page pp.1-4 
#Pages 4 
Date of Issue 2005-12-09 (R, SSS) 

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