Are All 6 Fukushima Reactors In Trouble?Everyone knows that Fukushima reactors 1-3 have melted down, and the fuel pool at reactor 4 is ruined.
But reactors 5 and 6 have been almost entirely ignored since the earthquake because – we were assured – the reactors were in controlled shutdown prior to the earthquake, and so all was safe.
However, there are rumors of problems.
For example, Fukushima Diary notes:
On Tepco’s press release data of 4/25/2011, Iodine-133 was measured at intake of reactor 5 and 6.(See original for additional graphics; and see this).
0.15 Bq/cm3 8:50 4/24/2011
0.23 Bq/cm3 14:30 4/24/2011
Also, according to press release data of 6/13/2011, the temperature of reactor 5 and 6 were hotter than 200 ºC, and data of 3/11~3/15 are concealed.
Even on 3/19/2011, they were still 183C and 167C.
5/16/2011, Tepco released data of how much contaminated water is sticked [I assume he means "stuck"] under the container vessels.
The table shows,
300 cubic meters under reactor 5,
13,500 cubic meters under reactor 6.
In the data on 6/13,the temperature of the water in container vessels are carefully concealed from 3/11~15
Remember that reactors 5 and 6 have spent fuel pools as well as reactors. As I pointed out on March 16th:
Kyodo News notes:I noted on May 31st:
Edano said water temperatures in the pools at the No. 5 and No. 6 reactors at the Fukushima plant have been rising as well.
The agency said among the three, the situation is the severest at the No. 4 reactor because all the fuel rods are stored in the pool due to the change of the reactor’s shroud. At the No. 5 and No. 6 reactors, up to one-third of the rods are being kept in the pools. The more fuel rods that are kept in a pool, the more radioactive substances could be emitted.
While most of the problems have been at reactors 1, 2 and 3 (which were all operating when the earthquake hit) and reactor 4 (where spent fuel rods have been leaking), there have also been problems at reactor number 5 as well. Specifically, asAnd as the Institute of Nuclear Power Operations’ Special Report on the Nuclear Accident at the Fukushima Daiichi Nuclear Power Station, demonstrates, the whole story of a cold shutdown of reactors 5 and 6 may be questionable.
The operator of the damaged Fukushima Daiichi nuclear power plant says temperatures in the Number 5 reactor and its spent fuel storage pool have risen due to pump failure. The reactor has been in a state of cold shutdown.
Tokyo Electric Power Company says it found at 9 PM on Saturday that a pump bringing seawater to cooling equipment for the reactor and pool had stopped working.
TEPCO says temperatures have been rising since then.
As summarized yesterday by EneNews:
This post is not affirmatively making claims, but rather asking questions, to which we deserve answers … especially since Tepco has been covering up the scope and severity of the accident since day one.
- “Four of the five emergency diesel generators on units 5 and 6 were inoperable after the tsunami”
- “One air-cooled emergency diesel generator on Unit 6 continued to function and supplied electrical power to Unit 6, and later to Unit 5, to maintain cooling to the reactor and spent fuel pool.”
- “Unit 5 had been shut down and in an outage since January 3, 2011. Fuel had been loaded into the reactor and the reactor pressure vessel (RPV) reassembled.”
- “Unit 6 had been shut down and in an outage since August 14, 2010. Fuel had been loaded into the reactor and the RPV reassembled.”
- “The Unit 6 air-cooled EDG and portions of the electrical distribution system survived the tsunami and were used to reestablish cold shutdown on units 5 and 6.”
- “After the tsunami impacted the site, operators were able to use the 6B emergency diesel generator (EDG) to provide power to cooling systems for the Unit 6 spent fuel pool. After installing temporary cables, the 6B EDG [generator] provided power to Unit 5 spent fuel pool cooling.”