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I&C and Inherent CharacteristicsI&C and Inherent CharacteristicsI&C and Inherent CharacteristicsI&C and Inherent Characteristics
IAEA INPRO DF-7
Vienna, November 19-22, 2013
Jong Tae Seo
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1. INPRO Criteria 1.2.1
2. APR1400 I&C Design
Characteristics
3. INPRO Evaluation
• EP 1.2.1.1 Continuous Monitoring of
Plant Health
• EP 1.2.1.2 Dynamic Plant Analysis
4. Summary
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User Requirements and Criteria
INPRO Criteria 1.2.1 I&C and Inherent
Characteristics
Basic PrincipleBasic PrincipleBasic PrincipleBasic Principle BPBPBPBP1 1 1 1 (Defense in Depth) : (Defense in Depth) : (Defense in Depth) : (Defense in Depth) : Installations of an Innovative Nuclear Installations of an Innovative Nuclear Installations of an Innovative Nuclear Installations of an Innovative Nuclear Energy System shall incorporate enhanced Energy System shall incorporate enhanced Energy System shall incorporate enhanced Energy System shall incorporate enhanced defencedefencedefencedefence----inininin----depth as a part of their depth as a part of their depth as a part of their depth as a part of their fundamental safety approach and ensure that the levels of protection in fundamental safety approach and ensure that the levels of protection in fundamental safety approach and ensure that the levels of protection in fundamental safety approach and ensure that the levels of protection in defencedefencedefencedefence----inininin----depth shall be more independent from each other than in existing installations.depth shall be more independent from each other than in existing installations.depth shall be more independent from each other than in existing installations.depth shall be more independent from each other than in existing installations.
URURURUR1.2 1.2 1.2 1.2 (Detection and (Detection and (Detection and (Detection and interception):interception):interception):interception):Installations of an INS Installations of an INS Installations of an INS Installations of an INS should detect and should detect and should detect and should detect and intercept deviations from intercept deviations from intercept deviations from intercept deviations from normal operational states normal operational states normal operational states normal operational states in order to prevent in order to prevent in order to prevent in order to prevent anticipated operational anticipated operational anticipated operational anticipated operational occurrences fromoccurrences fromoccurrences fromoccurrences fromescalating to accidentescalating to accidentescalating to accidentescalating to accidentconditions.conditions.conditions.conditions.
CRCRCRCR1.2.1 1.2.1 1.2.1 1.2.1 I&C and inherent characteristicsI&C and inherent characteristicsI&C and inherent characteristicsI&C and inherent characteristics
ININININ1.2.11.2.11.2.11.2.1: Capability of: Capability of: Capability of: Capability ofcontrol and control and control and control and instrumentation systeminstrumentation systeminstrumentation systeminstrumentation systemand/or inherent and/or inherent and/or inherent and/or inherent characteristics to detect characteristics to detect characteristics to detect characteristics to detect and intercept and/or and intercept and/or and intercept and/or and intercept and/or compensate deviations compensate deviations compensate deviations compensate deviations from normal operational from normal operational from normal operational from normal operational states.states.states.states.
ALALALAL1.2.11.2.11.2.11.2.1: Key system: Key system: Key system: Key systemvariables relevant to variables relevant to variables relevant to variables relevant to safety (e.g., flow, safety (e.g., flow, safety (e.g., flow, safety (e.g., flow, pressure, temperature, pressure, temperature, pressure, temperature, pressure, temperature, radiation levels) do not radiation levels) do not radiation levels) do not radiation levels) do not exceed limits acceptable exceed limits acceptable exceed limits acceptable exceed limits acceptable for continued operation for continued operation for continued operation for continued operation (no event reporting (no event reporting (no event reporting (no event reporting necessary).necessary).necessary).necessary).
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Defense-in-Depth
INPRO Criteria 1.2.1 I&C and Inherent
Characteristics
DID
LevelINSAG ObjectivesINSAG ObjectivesINSAG ObjectivesINSAG Objectives Innovation Direction (INPRO)Innovation Direction (INPRO)Innovation Direction (INPRO)Innovation Direction (INPRO)
1111
Prevention of Prevention of Prevention of Prevention of abnormalabnormalabnormalabnormaloccurrences andoccurrences andoccurrences andoccurrences andaccidentsaccidentsaccidentsaccidents
Enhance prevention by increased emphasis onEnhance prevention by increased emphasis onEnhance prevention by increased emphasis onEnhance prevention by increased emphasis oninherently safe design characteristics and passiveinherently safe design characteristics and passiveinherently safe design characteristics and passiveinherently safe design characteristics and passivesafety features, and by further reducing humansafety features, and by further reducing humansafety features, and by further reducing humansafety features, and by further reducing humanactions in the routine operation of the plant.actions in the routine operation of the plant.actions in the routine operation of the plant.actions in the routine operation of the plant.
2222
Control of abnormalControl of abnormalControl of abnormalControl of abnormaloperation and operation and operation and operation and detection of failuresdetection of failuresdetection of failuresdetection of failures
Give priority to advanced control and monitoringGive priority to advanced control and monitoringGive priority to advanced control and monitoringGive priority to advanced control and monitoringsystems with enhanced reliability, intelligence andsystems with enhanced reliability, intelligence andsystems with enhanced reliability, intelligence andsystems with enhanced reliability, intelligence andthe ability to anticipate and compensate abnormalthe ability to anticipate and compensate abnormalthe ability to anticipate and compensate abnormalthe ability to anticipate and compensate abnormaltransients.transients.transients.transients.
3333Control of Control of Control of Control of accidents within the accidents within the accidents within the accidents within the design basisdesign basisdesign basisdesign basis
Achieve fundamental safety functions byAchieve fundamental safety functions byAchieve fundamental safety functions byAchieve fundamental safety functions byoptimized combination of active & passive designoptimized combination of active & passive designoptimized combination of active & passive designoptimized combination of active & passive designFeatures.Features.Features.Features.
4444
Control of severe Control of severe Control of severe Control of severe plant conditionsplant conditionsplant conditionsplant conditions
Increase reliability and capability of systems toIncrease reliability and capability of systems toIncrease reliability and capability of systems toIncrease reliability and capability of systems tocontrol and monitor complex accident sequences;control and monitor complex accident sequences;control and monitor complex accident sequences;control and monitor complex accident sequences;decrease expected frequency of severe plantdecrease expected frequency of severe plantdecrease expected frequency of severe plantdecrease expected frequency of severe plantConditions.Conditions.Conditions.Conditions.
Avoid the necessity for evacuation or relocationAvoid the necessity for evacuation or relocationAvoid the necessity for evacuation or relocationAvoid the necessity for evacuation or relocationmeasures outside the plant site.measures outside the plant site.measures outside the plant site.measures outside the plant site.
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Evaluation Parameters and Acceptability
INPRO Criteria 1.2.1 I&C and Inherent
Characteristics
� Evaluation parameter EP1.2.1.1: Continuous monitoring of
the plant health
� Acceptability of EP1.2.1.1: Evidence is available to the
INPRO assessor that the INS design includes systems