ScribbleLive

agree on the zero reading, unless there was some mechanism to fail the instrument, I've seen the instrument go through a failure mode and then read down scale... if the instrument is used for interlocks many times they want it to fail in the safe or conservative 'tripped" condition

alot of times the instrument voltage is very sensitive to the chamber function so if the power fluctuated that could have caused some changes... the data tho still clearly shows rad level changes and magnitued

yees, there maybe a "failure mode" that explains zero readings.

but it could be a different instrument. tho i would expect they equip all the plants with the newest instruments, if there are better ones available.

@Edano remember this is TEPCO. Parts of the control room are original. We have seen photos of gauges and equipment that is original equipment and very antiquated. They might have upgraded sensors, maybe not. I would assume those things wear out over time?

the reactor control room etc looks so familiar to the types of control knobs switches, indicators etc that were in place when I started,, I was amazed that they still had the original control room with out upgrades

@lillymunster yes, this is tepco, so the radmeters could still be vintage, and they might be different in all reactors. stupid, but possible.

@dean now that you ask, this is #1 data during typhoon:
9/21 23:00,,,,-,,,,,,,"台風のためデータ採取せず ; "Without collecting data for typhoon".
i wanted to mark it in the plots, but didn't do it yet.

@Edano unit 1 could be different than 2-3 due to the age of construction. It seems like the knowledge and technology when 1 was built is quite different in many ways than when they built 2-4. So I could see some differences with 1 if they didn't upgrade.

the other readings around the typhoon are low, quite normal.

there's nothing wrong with old equipment. it is a good idea to keep things simple. an old car is easier to repair than a modern one. but if there are better tires available for the car, you should upgrade.

@ Edano, I suspect that they did an upgrade in safety instrumenation going from a 1/1 system to a 2:3 logic system which allows they to say as long as 2 of the 3 instruments are in service they can operate. that single modification safes alot of unplanned shutdowns from 1 faulty instrument.

@ lilly I am going to post a few links for videos on radiation and affects on DNA for viewing pleasure

radiation @ lilly.. I'll put a couple of the DNA ones up then I have to leave for awhile

TEPCO finds own nuclear accident manual useless

TOKYO, Oct. 2, Kyodo

A draft of a Tokyo Electric Power Co. in-house report showed Sunday that the utility has found its own emergency manual was useless for handling the crisis at the Fukushima Daiichi nuclear plant, while also repudiating the widely held belief that a hydrogen explosion might have occurred at the plant's No. 2 reactor.

The report, to be finalized in mid-October for submission to the government, maintains the utility's account that an unexpectedly large tsunami was the fundamental cause of the crisis and calls for steps to prevent flooding of reactor buildings as a top priority.

Although the report is being compiled by a committee of company employees from other sections to verify the claims of colleagues in the utility's nuclear sections, the report simply accepts the latter's account regarding the cause of the disaster. english.kyodonews.jp

the bad bad godzilla tsunami .....

Incumbent beats antinuclear rival in Hokkaido mayoral election

SAPPORO, Oct. 2, Kyodo english.kyodonews.jp