[Marxism] Peer reviewed article by Japanese scientist suggests that Unit 2 broken by quake before tsunami hit

Louis Proyect lnp3 at panix.com
Thu Mar 29 07:35:46 MDT 2012


Journal of Nuclear Science and Technology, 49 (2012), 360--365.

http://www.tandfonline.com/doi/abs/10.1080/00223131.2012.669237#preview

A scenario of large amount of radioactive materials discharge to
the air from the Unit 2 reactor in the Fukushima Daiichi NPP accident

Fumiya Tanabe
	
Abstract:

Based on an analysis of the measured data with review of
calculated results on the core melt accident, a scenario is
investigated for large amount of radioactive materials discharge
to the air from the Unit 2 reactor. The containment pressure
suppression chamber (S/C) should have failed until the noon on 12
March 2011 only by seismic load due to the huge earthquake on 11
March or by combination of seismic deterioration and dynamic load
due to steam flowing-in through safety relief valve. Opening of
the two safety relief valves (SRVs) at 14 March 21:18 should have
resulted in discharge of large amount of radioactive materials
through the S/C breach with the measured air dose rate peak value
of 3.130E-3Sv/h at 21:37 near the main gate of the site. The
containment drywell (D/W) should have failed at 15 March 06:25, at 
the cable penetration seal due to high temperature caused by the 
fuel materials heating up on the floor of the D/W, which had
flowed out from the reactor pressure vessel. Then large amount of
radioactive materials should have been discharged through the D/W
breach with the measured air dose rate peak value of 1.193E-2Sv/h
at 15 March 9:00.




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