Investor Presentaiton
NRA, Japan
Nuclear Regulation Authority
Appendix
Fire Safety Research on
HEAF: High Energy Arcing Fault
■ At Onagawa-1, fire took place due to
short circuit inside MC during the 2011
Tohoku Earthquake.
■ High energy gas generated by
arcing fire was propagated to the
other cabinets through the control
cable duct.
■ In 2012, JNES started HEAF tests
at U.S. KEMA and S/NRA/R
continues them.
HEAF simulation Test
at KEMA in U.S.
28
No. 8 cabinet
Source: Tohoku Electric Power, May 2011,
http://www.nsr.go.jp/archive/nisa/earthquake/files/hou
koku230530-2.pdf
■Currently, S/NRA/R is actively participating
in the OECD/NEA international joint projects,
PRISME-2 and HEAF.
■The acquired data have been used for
developing the Review Guides for Fire
Protection and Fire Hazard Analysis for
the new regulatory requirements.View entire presentation