Journal of Energy Engineering (에너지공학)

The Korean Society for Energy (한국에너지학회)
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TOP-MOUNTED IN-CORE INSTRUMENTATION : CURRENT STATUS AND TECHNICAL ISSUES

  • KIM, SUNG JUN (Mechanical System Engineering Department, NSSS Division, KEPCO Engineering & Construction Company Inc.) ;
  • KANG, TAE KYO (Mechanical System Engineering Department, NSSS Division, KEPCO Engineering & Construction Company Inc.) ;
  • CHO, YEON HO (Mechanical System Engineering Department, NSSS Division, KEPCO Engineering & Construction Company Inc.) ;
  • CHANG, SANG GYOON (Mechanical System Engineering Department, NSSS Division, KEPCO Engineering & Construction Company Inc.) ;
  • LEE, DAE HEE (Mechanical System Engineering Department, NSSS Division, KEPCO Engineering & Construction Company Inc.) ;
  • MAENG, CHEOL SOO (Mechanical System Engineering Department, NSSS Division, KEPCO Engineering & Construction Company Inc.)
  • Received : 2015.03.17
  • Accepted : 2015.06.04
  • Published : 2015.06.30
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Abstract

The in-core instrumentation measures core power distribution and coolant temperature in local regions of the core in pressurized water reactors. The installation types are distinguished by the designs of routing paths that exit either through reactor bottom mounted instrument nozzles or through reactor top mounted instrument nozzles. Although each type has unique advantages, it is generally known that top mounted design is more competitive with respect to emphasizing nuclear safety issues and ability to cope with severe accidents. The international nuclear vendors have provided various types of reactors with top mounted design. Nuclear power reactors in Korea, however, only have been designed to be applicable to the use of bottom mounted design, and it has been pointed out that the capabilities of Korean reactors against severe accidents should be further enhanced. The paper deals with technical issues on reactor internal and external design, in-core instrumentation, support assembly, sealing mechanism with nozzles, handling, and analytical issues in order to establish the ways of development.

Keywords

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