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@RBeaner, the NRC's assessment says : "Fuel pool is heating up but is adequately cooled, and fuel may have been ejected from the pool (based on information from TEPCO of neutron sources found up to 1 mile from the units, and very high dose rate material that had to be bulldozed over between Units 3 and 4." www.wdr.de

@elainekirk as shown on that graph, they alternate cooling of the 6 SFP with 6 RPV, temp continuously cycles.

@elainekirk , elaine, that is what I found in NISA p IV-101 dated June:
(6) Unit 6 at the Fukushima Daiichi NPS
1) From the outbreak of the earthquakes until the strike of the tsunami
Unit 6 had been suspended due to a periodic inspection since Aug. 14, 2010. The reactor
was in a cold shutdown condition with the fuel being loaded. Further, two 66-kV lines
from Yorunomori Line 1 and 2 had been secured as an external power supply.
On March 11, the 66-kV transmission line towers at Yorunomori Line 27 collapsed when
the earthquake hit them and the external power supply was lost. Thus, three emergency
DGs were automatically started.
2) Impact of the tsunami
At 15:40, two emergency DGs (6A, 6H) halted due to the flooding of the seawater pumps
and damage to the metal-clad switchgears resulting from the tsunami. However, one
emergency DG (6B) continued to function. Because the emergency DB (6B) was installed
in the DG building at a relatively high location rather than the turbine building, it
remained in operation. Thus, Unit 6 did not lose AC power completely. Because of the
tsunami, the seawater pumps lost their functions.
The pressure in the reactor moderately increased due to the decay heat; however, the rate
of increase was more modest than that of Unit 5 because a longer period of time had
elapsed after the halt.
3) Control of pressure and water level in the reactor
On March 13, water was successfully injected into the reactor using the condensate
transfer pump, which received power from the emergency DG. Accordingly, after March
14, the reactor pressure and the water level were controlled by reducing pressure with the
SRV and repeatedly refilling the reactor with water from the condensate storage tank
through the condensate transfer pump in parallel.
On March 19, a temporary seawater pump was installed to activate the RHR system. The
spent fuel pool and the reactor were alternately cooled by switching the RHR system
interchangeably, and the reactor achieved cold shutdown at 19:27 on March 20.

Erk. "As our knowledge and understanding of the events at Fukushima continues to grow, we must double our efforts to translate technical concepts into understandable terms and to counter those who would sow the seeds of Fear, Uncertainty, and Doubt (FUD) among concerned audiences. Providing clear, correct, and positive information about nuclear science and technology is the responsibility of each ANS member. " ansnuclearcafe.org

NEWS ADVISORY: Kan apologizes for confusion over Genkai reactors in talks with ministers (10:46) english.kyodonews.jp

NEWS ADVISORY: N. Korea raps Japan for not giving info about radioactivity leakage (10:38)
english.kyodonews.jp