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Development of an Evaluation Methodology for Loss of Large Area induced from Extreme Events with malicious origin

Sok-Chul Kim ; Korea Institute of Nuclear Safety 62 Gwahak-ro, Yuseong-gu, Daejeon, Korea, 34142
Jong-Seuk Park ; Korea Institute of Nuclear Safety 62 Gwahak-ro, Yuseong-gu, Daejeon, Korea, 34142
Dong-Ju Chang ; Korea Institute of Nuclear Safety 62 Gwahak-ro, Yuseong-gu, Daejeon, Korea, 34142
Do-Hyoung Kim ; Korea Institute of Nuclear Safety 62 Gwahak-ro, Yuseong-gu, Daejeon, Korea, 34142
Seung-Woo Lee ; Korea Institute of Nuclear Safety 62 Gwahak-ro, Yuseong-gu, Daejeon, Korea, 34142
Yong-Jin Lee ; Korea Institute of Nuclear Safety 62 Gwahak-ro, Yuseong-gu, Daejeon, Korea, 34142

Sažetak

Event of loss of large area (LOLA) induced from extreme external event at multi-units
nuclear installation has been emerged a new challenges in the realm of nuclear safety and regulation
after Fukushima Dai-Ichi accident. The relevant information and experience on evaluation
methodology and regulatory requirements are rarely available and negative to share due to the
security sensitivity. Most of countries has been prepared their own regulatory requirements and
methodologies to evaluate impact of LOLA at nuclear power plant. In Korea, newly amended the
Nuclear Safety Acts requires to assess LOLA in terms of EDMG (Extended Damage Mitigation
Guideline). Korea Institute of Nuclear Safety (KINS) has performed a pilot research project to
develop the methodology and regulatory review guidance on LOLA at multi-units nuclear power
plant since 2014. Through this research, we proposed a methodology to identify the strategies for
preventive and mitigation of the consequences of LOLA utilizing PSA techniques or its results. The
proposed methodology is comprised of 8 steps including policy consideration, threat evaluation,
identification of damage path sets, SSCs capacity evaluation and identification of mitigation
measures and strategies. The consequence of LOLA due to malevolent aircraft crash may
significantly susceptible with analysis assumptions including type of aircraft, amount of residual
fuel, and hittable angle and so on, which cannot be shared overtly. This paper introduces a
evaluation methodology for LOLA using PSA technique and its results. Also we provide a case
study to evaluate hittable access angle using flight simulator for two types of aircrafts and to
identify potential path sets leading to core damage by affected SSCs within damaged area.

Ključne riječi

BDBEEE; LOLA; EDMG

Hrčak ID:

199638

URI

https://hrcak.srce.hr/199638

Datum izdavanja:

1.9.2017.

Posjeta: 448 *