Development of a mitigation system against hydrogen-air deflagrations in nuclear power plants

Hiroyasu Saito, Teruhito Otsuka, Norihiko Yoshikawa, Nozomu Kanno, Seiji Takanashi, Yousuke Oozawa, Masahiro Hirata, Masayuki Takeshita, Kenji Sakuragi, Sayuri Kurihara, Yuichiro Tsunashima, Naohito Aoki, Kento Tanaka

Research output: Contribution to journalArticle

Abstract

A novel mitigation system against hydrogen-air deflagrations in nuclear power plant buildings is proposed and developed through a series of field experiments using explosion vessels of different volume sizes. The mitigation system is installed on the outer surface of the vessels, and it comprises flame arrester and explosion air bag. The flame arrester is made by stacking 10–20 sheets of fine-mesh wire screens, and the air bag is connected for holding explosion gas. The successful mitigation mechanism is the sequence of pressure-rise reduction by the air bag expansion, flame quenching by the flame arrester, and the slow burning of the gas mixture sucked from the air bag back into the vessel due to the negative pressure caused by the rapid condensation of water vapor inside the vessel. Necessary conditions for the successful mitigation system are discussed, and the practical unit size of flame arrester sheet is recommended.

Original languageEnglish
Pages (from-to)9-16
Number of pages8
JournalJournal of Loss Prevention in the Process Industries
Volume60
DOIs
Publication statusPublished - 2019 Jul 1

Fingerprint

nuclear power
power plants
Nuclear power plants
hydrogen
Explosions
Hydrogen
bags
explosions
air
Air
Steam
Gas mixtures
Water vapor
gases
Condensation
Quenching
Gases
Wire
wire
water vapor

Keywords

  • Deflagration
  • Flame arrester
  • Hydrogen explosion
  • Mitigation
  • Nuclear power plant
  • Severe accident

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Food Science
  • Chemical Engineering(all)
  • Safety, Risk, Reliability and Quality
  • Energy Engineering and Power Technology
  • Management Science and Operations Research
  • Industrial and Manufacturing Engineering

Cite this

Development of a mitigation system against hydrogen-air deflagrations in nuclear power plants. / Saito, Hiroyasu; Otsuka, Teruhito; Yoshikawa, Norihiko; Kanno, Nozomu; Takanashi, Seiji; Oozawa, Yousuke; Hirata, Masahiro; Takeshita, Masayuki; Sakuragi, Kenji; Kurihara, Sayuri; Tsunashima, Yuichiro; Aoki, Naohito; Tanaka, Kento.

In: Journal of Loss Prevention in the Process Industries, Vol. 60, 01.07.2019, p. 9-16.

Research output: Contribution to journalArticle

Saito, H, Otsuka, T, Yoshikawa, N, Kanno, N, Takanashi, S, Oozawa, Y, Hirata, M, Takeshita, M, Sakuragi, K, Kurihara, S, Tsunashima, Y, Aoki, N & Tanaka, K 2019, 'Development of a mitigation system against hydrogen-air deflagrations in nuclear power plants', Journal of Loss Prevention in the Process Industries, vol. 60, pp. 9-16. https://doi.org/10.1016/j.jlp.2019.03.011
Saito, Hiroyasu ; Otsuka, Teruhito ; Yoshikawa, Norihiko ; Kanno, Nozomu ; Takanashi, Seiji ; Oozawa, Yousuke ; Hirata, Masahiro ; Takeshita, Masayuki ; Sakuragi, Kenji ; Kurihara, Sayuri ; Tsunashima, Yuichiro ; Aoki, Naohito ; Tanaka, Kento. / Development of a mitigation system against hydrogen-air deflagrations in nuclear power plants. In: Journal of Loss Prevention in the Process Industries. 2019 ; Vol. 60. pp. 9-16.
@article{8c91ec3f789448aeab70bccf1801f224,
title = "Development of a mitigation system against hydrogen-air deflagrations in nuclear power plants",
abstract = "A novel mitigation system against hydrogen-air deflagrations in nuclear power plant buildings is proposed and developed through a series of field experiments using explosion vessels of different volume sizes. The mitigation system is installed on the outer surface of the vessels, and it comprises flame arrester and explosion air bag. The flame arrester is made by stacking 10–20 sheets of fine-mesh wire screens, and the air bag is connected for holding explosion gas. The successful mitigation mechanism is the sequence of pressure-rise reduction by the air bag expansion, flame quenching by the flame arrester, and the slow burning of the gas mixture sucked from the air bag back into the vessel due to the negative pressure caused by the rapid condensation of water vapor inside the vessel. Necessary conditions for the successful mitigation system are discussed, and the practical unit size of flame arrester sheet is recommended.",
keywords = "Deflagration, Flame arrester, Hydrogen explosion, Mitigation, Nuclear power plant, Severe accident",
author = "Hiroyasu Saito and Teruhito Otsuka and Norihiko Yoshikawa and Nozomu Kanno and Seiji Takanashi and Yousuke Oozawa and Masahiro Hirata and Masayuki Takeshita and Kenji Sakuragi and Sayuri Kurihara and Yuichiro Tsunashima and Naohito Aoki and Kento Tanaka",
year = "2019",
month = "7",
day = "1",
doi = "10.1016/j.jlp.2019.03.011",
language = "English",
volume = "60",
pages = "9--16",
journal = "Journal of Loss Prevention in the Process Industries",
issn = "0950-4230",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Development of a mitigation system against hydrogen-air deflagrations in nuclear power plants

AU - Saito, Hiroyasu

AU - Otsuka, Teruhito

AU - Yoshikawa, Norihiko

AU - Kanno, Nozomu

AU - Takanashi, Seiji

AU - Oozawa, Yousuke

AU - Hirata, Masahiro

AU - Takeshita, Masayuki

AU - Sakuragi, Kenji

AU - Kurihara, Sayuri

AU - Tsunashima, Yuichiro

AU - Aoki, Naohito

AU - Tanaka, Kento

PY - 2019/7/1

Y1 - 2019/7/1

N2 - A novel mitigation system against hydrogen-air deflagrations in nuclear power plant buildings is proposed and developed through a series of field experiments using explosion vessels of different volume sizes. The mitigation system is installed on the outer surface of the vessels, and it comprises flame arrester and explosion air bag. The flame arrester is made by stacking 10–20 sheets of fine-mesh wire screens, and the air bag is connected for holding explosion gas. The successful mitigation mechanism is the sequence of pressure-rise reduction by the air bag expansion, flame quenching by the flame arrester, and the slow burning of the gas mixture sucked from the air bag back into the vessel due to the negative pressure caused by the rapid condensation of water vapor inside the vessel. Necessary conditions for the successful mitigation system are discussed, and the practical unit size of flame arrester sheet is recommended.

AB - A novel mitigation system against hydrogen-air deflagrations in nuclear power plant buildings is proposed and developed through a series of field experiments using explosion vessels of different volume sizes. The mitigation system is installed on the outer surface of the vessels, and it comprises flame arrester and explosion air bag. The flame arrester is made by stacking 10–20 sheets of fine-mesh wire screens, and the air bag is connected for holding explosion gas. The successful mitigation mechanism is the sequence of pressure-rise reduction by the air bag expansion, flame quenching by the flame arrester, and the slow burning of the gas mixture sucked from the air bag back into the vessel due to the negative pressure caused by the rapid condensation of water vapor inside the vessel. Necessary conditions for the successful mitigation system are discussed, and the practical unit size of flame arrester sheet is recommended.

KW - Deflagration

KW - Flame arrester

KW - Hydrogen explosion

KW - Mitigation

KW - Nuclear power plant

KW - Severe accident

UR - http://www.scopus.com/inward/record.url?scp=85063880466&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85063880466&partnerID=8YFLogxK

U2 - 10.1016/j.jlp.2019.03.011

DO - 10.1016/j.jlp.2019.03.011

M3 - Article

AN - SCOPUS:85063880466

VL - 60

SP - 9

EP - 16

JO - Journal of Loss Prevention in the Process Industries

JF - Journal of Loss Prevention in the Process Industries

SN - 0950-4230

ER -