Investor Presentaiton
NRA, Japan
Nuclear Regulation Authority
New Regulatory Requirements:
Enhanced Measures against Tsunami
More Stringent Standards
on Tsunami
Enlarged Application of
Higher Seismic Resistance
It is required to define "design basis tsunami"
that exceeds the largest in the historical
records and to take protective measures
such as breakwater wall based on it.
9
SSCs for tsunami protective measures are
classified as Class S equivalent to RPV etc.
of seismic design importance classification.
Example of protective measures against tsunami (multiple measures)
■ Breakwater wall for prevention
of inundation to the site
■ Tsunami gate for prevention of
water penetration into the building
http://www.nsr.go.jp/english/data/20130313presen.pdfView entire presentation