Tokyo Bay cesium even higher than levels reported off Fukushima — Nearly entire sea floor contaminated by 2014 (VIDEO)

@ Tiny Buggy Chan,
mostly by the Venting of the Security Valves
to release the Stress of the Containment!

[link to www.tepco.co.jp]

Last Edited by the mighty Atom on 11/09/2012 12:36 PM

Fukushima Daiichi Unit 1 Event Sequence Leading to Venting (After Tsunami)
March 11 March 12
15:42 Nuclear Emergency Act Article 10 event occurs (station black out)

16:36 Nuclear Emergency Act Article 15 event occurs (the loss of ECCS injection sources due to unknown
reactor water level ）

[Venting review & operation]
Preliminary preparations commenced for venting
AM operation procedures and valve checklist confirmed
Review of venting operation procedures in cases of no
power condition
21:51 Radiation dose rose in
the reactor building
23:00 Radiation dose rose in
front of the double
doors of the reactor
building
Around 23:50 D/W pressure
was confirmed to be
600 kPa

[Plant behavior]
0:06 D/W pressure may have exceeded 600kPa, and site
superintendent ordered preparations for venting to proceed
Started confirming the methods and procedures for operating
valves and other detailed procedures

Around 1:30 The information was provided to the central government
for implementation of venting and it was accepted

2:24 Working time was confirmed for site operation of venting
(The working time of 17 minutes due to dose limit for
emergency situation)

3:06 Press conference regarding the implementation of venting

3:44 Assessment conducted of exposure dose during emergency
response

2:30 D/W pressure was
confirmed to have
reached 840kPa
[Subsequently, pressure
stabilized around 750 kPa]

When the air lock of the reactor building was opened,
there was a white “haze.” Radiation dose could not be
measured.

In the MCR, order of valve operation and other details
repeatedly confirmed
Collected necessary equipment for operation as
extently possible

4:39 80mSv set APD delivered to the MCR

6:33 Confirmed community evacuation status (evacuation from Okuma Town was
under the review)

8:03 The site superintendent ordered that the venting operation be performed with
a target of 9:00

8:27 Information that part of the district in the southern vicinity of the power station
has not been able to evacuated

9:02 Confirmed that the district in the southern vicinity of the power
station has been evacuated

9:04 Operators headed to the field for venting operation
（9:15 First team opened PCV vent valve (MO valve), and second
team headed to the field site. However, S/C vent bypass valve
(AO valve) could not be opened do to a high radiation dose.)
10:17～Remote operation of S/C vent bypass valve (AO valve) performed
(3 times. Unknown whether it opened).

Concurrently, connection
for a temporary air compressor was reviewed
Around 12:30 Temporary air compressor was procured and a Unic crane
vehicle was used to transport it. Search made for connection
adaptors

Around 14:00 Temporary compressor set up outside the truck bay of the
reactor building, and started up

14:30 “Release of radioactive material” by venting is decided

10:40 Radiation dose rose at
the main gate and MP

11:15 Radiation dose
decreased

14:30 D/W pressure decreased
Necessity for venting
was realized
immediately after the
disaster occurred,
and preliminary
preparations were
prepared

Last Edited by the mighty Atom on 11/09/2012 12:42 PM

Of course... you mean the venting that prevented the hydrogen explosions....?

Buggy-Chan,

normally i thought that you know what you are talking about
but your last Statements are really shitty!



@ The People who want to know what really happened,
please visit the Pages from the People who know
what they are talking about but please do not
forget to visit also the Pages you normally don't like,
to get the full Picture you must be able to see all the different Colours!

On March 11, at around 23:00, the radiation level was rising, and, at around
23:50, it was established that the dry well pressure was 600 kPa [abs].

At 0:06 on
March 12, the Site Superintendent gave orders to prepare the PCV for venting.

A venting operation procedures manual was prepared by the ERC at the power
station. In the MCR, with only the emergency lighting available, workers prepared
to carry out the actual operation procedures.

In the first venting operation of this sort carried out in Japan, the government and
local authorities coordinated their efforts, the status of evacuation of local
residents was checked, and efforts were made to minimize the radiation
exposure to the extent possible.

Last Edited by the mighty Atom on 11/09/2012 12:52 PM

Oh, com'on.. man up a little.

We've been over all of this before.
It's getting wearisome.
My opinions... your opinions...

I'm not dependent on your approval.
Make a case and move on.

[link to www.tepco.co.jp]

Something that is Open ("Loss of Containment") do not show this Effect!

Last Edited by the mighty Atom on 11/09/2012 01:09 PM

Correct..
It shows over-pressure.. which causes cracks in seams and welds...

Just before you wrote that this Cracks was there already since a long Time!
Thread: Tokyo Bay cesium even higher than levels reported off Fukushima — Nearly entire sea floor contaminated by 2014 (VIDEO) (Page 2)


Last Edited by the mighty Atom on 11/09/2012 01:18 PM