STUDY ON LOSS-OF-COOLING AND LOSS-OF-COOLANT ACCIDENTS IN SPENT FUEL POOL, (1) OVERVIEW

Yoshiyuki Kaji; Yoshiyuki Nemoto; Taku Nagatake; Hiroyuki Yoshida; Masayuki Tojo; Daisuke Goto; Satoshi Nishimura; Hiroaki Suzuki; Masaaki Yamato; Satoshi Watanabe

doi:10.1299/jsmeicone.2019.27.1343

2019.27

Session ID : 1343

DOI https://doi.org/10.1299/jsmeicone.2019.27.1343

Conference information

Host: The Japan Society of Mechanical Engineers

Name : The 27th International Conference on Nuclear Engineering (ICONE27)

Date : May 19, 2019 - May 24, 2019

STUDY ON LOSS-OF-COOLING AND LOSS-OF-COOLANT ACCIDENTS IN SPENT FUEL POOL, (1) OVERVIEW

*Yoshiyuki Kaji, Yoshiyuki Nemoto, Taku Nagatake, Hiroyuki Yoshida, Masayuki Tojo, Daisuke Goto, Satoshi Nishimura, Hiroaki Suzuki, Masaaki Yamato, Satoshi Watanabe

Author information

*Yoshiyuki Kaji
Japan Atomic Energy Agency
Yoshiyuki Nemoto
Japan Atomic Energy Agency
Taku Nagatake
Japan Atomic Energy Agency
Hiroyuki Yoshida
Japan Atomic Energy Agency
Masayuki Tojo
Global Nuclear Fuel Japan, Co, Ltd City
Daisuke Goto
Global Nuclear Fuel Japan, Co, Ltd City
Satoshi Nishimura
Central Research Institute of Electric Power Industry City
Hiroaki Suzuki
the Institute of Applied Energy City
Masaaki Yamato
Mitsubishi Heavy Industries, Ltd.
Satoshi Watanabe
Hitachi-GE Nuclear Energy, Ltd.

Keywords: Spent Fuel Pool, Severe Accident Code, Loss-of-Cooling, Loss-of-Coolant Accident, Safety Measure

CONFERENCE PROCEEDINGS RESTRICTED ACCESS

Details

Abstract

Risk of severe accident in spent fuel pool (SFP) in nuclear power plant (NPP) which would be caused by cooling power loss or coolant water depletion was spot-lighted after the accidents in Fukushima Daiichi NPP. Effectiveness of considerable safety measures against SFP accident has to be investigated. For this purpose, it is required to improve the conventional severe accident (SA) codes so that these can be applied for SFP accident condition. In this research program, cladding oxidation model in SFP accident condition, and numerical simulation method to evaluate capability of spray cooling system which was deployed for spent fuel cooling during SFP accident, have been developed. These were introduced into the severe accident codes such as MAAP and SAMPSON, and SFP accident analyses were conducted. Analyses using Computational Fluid Dynamics (CFD) code were conducted as well for the comparison with SA code analyses and investigation of detail in the SFP accident. In addition, threedimensional criticality analysis method was developed as well, and safer loading pattern of spent fuelsin SFP was investigated.

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