The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Review on tolerance factors for 1E UVR setting at NPPs

원전 안전등급 저전압계전기 설정시 오차함수 검토

  • 문수철 (충남대 공과대학 전기공학과) ;
  • 김건중 (충남대 공과대학 전기공학과)
  • Received : 2011.12.09
  • Accepted : 2012.02.22
  • Published : 2012.03.01
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Abstract

In nuclear plants, UVR (under voltage relay, 27r) of 1E bus, which protected and supplied power to essential loads, to safety trip of reactor and supplied to starting signal of EDG (emergency diesel generators) automatically. therefore UVR tolerances setting and calculation method has been important to nuclear facility. If calculation and tolerances values differ or ignore, may induced power loss and economical loss by protective failure. This paper show results for calculation methods, and whether dependant or independent methods for factors. included whether PT (potential transformer/voltage transformer) tolerance or not adapted, and based on UVR setting method within a difference minimum and maximum of rated voltage to safety operation in nuclear plants.

Keywords

References

  1. NUREG-0800, Standard Review Plan, chapter 8 and BTP 8-6(Adequacy of Station Electric Distribution System Voltages), NRC, 2007
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  4. ANSI/ISA-67.04.01, Setpoints for Nuclear Safety Related Instrumentation, 2000
  5. ABB company, single-phase voltage relays Instructions, pp. 5-9, 1984
  6. Final Report of Technical Specification revised to 1E bus UVR setting of nuclear plants, KOPEC, pp3-15, 2010
  7. Calculation E4C-015, Rev.0 TLU Calculation for Loss of Voltage Relays at Class 1E 4.16kV Switchgear, Song Unit 2&3, 2007
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Cited by

  1. Review Criteria for Reliability from Analysis of LOOP frequency in NPPs vol.62, pp.3, 2013, https://doi.org/10.5370/KIEE.2013.62.3.300