Japan Earthquake | Page 2229
synchronizing the diesel generator is something they do with a synch scope which shows the operator that the diesel generator is in phase with the diesel power busby dean 8/24/2011 8:03:44 PM
As per today's NRC Report, "All four emergency diesel generators (EDG) automatically started and loaded and provided power to the emergency buses. While operating, the 2H EDG developed a coolant leak and was shutdown. As a result, the licensee added EAL SA1.1 to their declaration."by es 8/24/2011 8:04:30 PM- it's conceivable that if you don't synch a diesel in and have a reverse phase the power on the electrical bus will drive the generator on the diesel and it will act like a motor turning the dieselby dean 8/24/2011 8:04:57 PM
- I wonder if the EQ caused problems that resulted in the diesel leak..by dean 8/24/2011 8:05:33 PM
- @ lilly.. that typical plant TSR you were looking at has the seismic values in it.. and they always have safety margins which must be met that is usually set to guarantee fuel damage margins are metby dean 8/24/2011 8:06:41 PM
- @ lilly.. remember after FUKUSHIMA where we were all concerned because the NRC had said that it was going to "relax" the seismic requirements based on the USGS recent seismic report.. DUH..by dean 8/24/2011 8:07:52 PM
I'm told that there are two units at Anna and each one had two generators, so one unit had only 50% backup capacity. I've not confirmed this, but the source is reliable. This is contra the commonly reported claim that backup capacity was reduced to 75%.by Ian 8/24/2011 8:09:13 PM- The NRC requires that nuclear power plants be designed to take into account the most severe natural phenomena historically reported in a nuclear plant's area. The Geological Survey said a well-built structure should be able to shrug off a quake like Tuesday's
The North Anna units were designed to withstand a magnitude 6.2 earthquake, Norvelle said. Tuesday's earthquake, which was centered about 11 miles from the plant, had a magnitude of 5.8, according to the U.S. Geological Survey.by dean 8/24/2011 8:10:07 PM - I hope NRC isn't just listening to the GEO SURVEY people who said.. good buliding "should"by dean 8/24/2011 8:10:41 PM
- Company and NRC officials were assessing North Anna for damage. "Our workers are doing a walkdown of the site as we speak," Norvelle said. can you imagine what the "walkdowns" are like... I bet they are not generic ones in sufficient detail to warrant a statement like... every thing is ok here... a descent walkdown would take days..by dean 8/24/2011 8:11:54 PM
@dean In regards to the trip of a scram basied on a "seismic" event.... (hope you can follow me not sure how to frase) question...1) understand the difference between the neutronics standpoint... different than the shutdown and operations of the systems requred to perform the neutronics.... the different procedures you refered to would be the concept of my question.... without any alarms indicating a "problem" in a system, I could see many reasons to bring the reator down in a non-auto scram... there seems to be information that would be pertaint to make the decision... (I will note that I am not up to speed on the trip points vs. the alarm points) do you know the lag time or paramiters used to go from "a trip/reading" to a auto-comand to shut down? if a EQ only last less than a minute and the computor has to 1) recieve it then does it "search" the alarm panel for other alarms and make the descision or is it an automatic.... EQ alarm hits a setpoint then does not look for secondary alarms in the systems, just starts an auto scram??? Hope you can follow what I am trying to say!by FITTER 8/24/2011 8:14:05 PM- @Majj To clairify the removal of the monitors, it would not indicate that Domion Power has no seismic monitors... the article is misleading... if you drill into it the monitors removed were part of Virginia Tech University. www.geol.vt.eduby FITTER 8/24/2011 8:14:07 PM
@FITTER Tanks for the explanation. Wen you reed it , it sounds very greed...by Majj 8/24/2011 8:15:42 PM- @ fitter, the typical times for scrams are in the milliseconds from the time the detected level reaches the trip point until the control system begins to insert the safety rods. Commercial plants are bigger and have perhaps alittle longer but that scram needs to be sensed, tripped, and rod motion started within those low millisecond limits... the safety rods go in fastest.. but control rods take somewhere at 4 minutes to drive in ... but it's the safety rods that take the reactor subcriticalby dean 8/24/2011 8:17:18 PM
- @ fitter.. the thing that threw me off was a piece that said the operators at anna were reaching to manually shut down the reactor when the power loss scram came in... the seismic scram should have happened and shut down the reactor well before the loss of power one..by dean 8/24/2011 8:18:42 PM
@Ian , the video you posted is a news report by German TV ZDF portraying and summarizing the work of the investigative journalist who managed to spend several hours on the premises of Daiichi, recording pretty high doses and experiencing rough working conditions.by Peter Melzer 8/24/2011 8:19:50 PM- @Majj I was wondering about the concept of removal myself and it seemed strange that DP would just remove thiers.. the college sent us a parent/student alarm yesterday before anyone eles around here was quoting the scale... that's what made me wonder who's they were...by FITTER 8/24/2011 8:29:23 PM
- @dean I think there is still some "translation" issues even thought the plant is not in Japan.. was reading a DP page today and I thought they were using the same tranlater that they use for FUKU... terrible technical info! I do not put much in the media info from the TV, internet... this is my field of expetiece, minus the "rad" and finding the info on the systems.... All those doc's from the early days have now become usefull... glad i did't throw them out, just need to reread them!by FITTER 8/24/2011 8:29:32 PM
- @dean thanks for the info on the timing, will look at in detail.. need to get clairification on some of the "verbeage"... take care all ...time for payrollby FITTER 8/24/2011 8:29:42 PM
- be safe fitterby dean 8/24/2011 8:30:04 PM
Lawsuit in 1976 regarding the building of the North Anna plants, related to fault line law.justia.comby Panserbjorne9 8/24/2011 8:35:14 PM- @ lilly The Department of Energy has authorized its environmental cleanup contractors at the Hanford nuclear reservation to lay off as many as 1,100 more workers in the fiscal year that begins Oct. 1, 2011. That’s in addition to up to 1,985 layoffs already announced this year, the majority of which will occur Sept. 29, 2011. The layoffs announced today are to prepare for a federal budget for the fiscal year that begins Oct. 1, which is expected to reduce Hanford’s annual budget. The 1,100 layoffs will start with up to 475 workers at the Hanford tank farms, a project of Washington River Protection Solutions.by dean 8/24/2011 8:38:36 PM
- be backby dean 8/24/2011 8:38:41 PM
- "Vepco withheld documents and lied to federal regulators during license application
proceedings for Units 1 and 2 in 1973. Ultimately, Vepco was found guilty of lying and a coverup in its efforts to obtain a construction license for the North Anna nuclear station near Louisa,
Virginia. Despite the deceptions, the US Nuclear Regulatory Commission granted Vepco a
license but fined the company $32,000 for seven materially false statements about the geologic fault under North Anna." Would love to get my hands on that Washington Post article on the cover of this. www.bredl.orgby Panserbjorne9 8/24/2011 8:40:09 PM 
Wow... $32,000... Now, there's a fine that says "We have to do this... sorry."by RadioGuy 8/24/2011 8:42:30 PM- @RadioGuy exactly. also sort of grease my palm and carry on. Interesting that they seem to have done the same covering up in 2003 when they wanted to add two more reactors. CRAZINESS.by Panserbjorne9 8/24/2011 8:44:47 PM
- Or as we've seen it all along: Nuke Regulatory Agency "Bad utility... bad, bad.... do better." Utility "We will."by RadioGuy 8/24/2011 8:45:04 PM
@Panserbjorne9 Searching... This looks interesting: www.ebooksread.comby RadioGuy 8/24/2011 8:47:39 PM- “Such blatant disregard of the need of the commission, its staff and its hearing board
to have the information necessary to carry out its duty to protect the health and safety of the public is almost entirely beyond belief and is indicative of, at best, extremely poor and unsound judgment on the part of Vepco management.” replace V with T.by Panserbjorne9 8/24/2011 8:47:52 PM - @Peter, thanks. Was there anything new in that video? Sounds like maybe not. Perhaps there's an English version out there.by Ian 8/24/2011 8:48:07 PM
@Panserbjorne9 pqasb.pqarchiver.com thats the article it can be bought for $3.95 but not sharedby elainekirk 8/24/2011 8:49:00 PM- by RadioGuy 8/24/2011 8:50:04 PM
- "The strongest penalties ever imposed on the nuclear power industry were levied
yesterday against the Virginia Electric and I'ower Co. for violations in connection
with construction of its four-reactor plant over a geologic fault in Louisa
County."by RadioGuy 8/24/2011 8:51:06 PM - That's the lede.by RadioGuy 8/24/2011 8:51:30 PM
- @RadioGuy NICE!!!by Panserbjorne9 8/24/2011 8:52:57 PM
- @Ian , nothing we did not know already caught my ear.by Peter Melzer 8/24/2011 8:54:14 PM
- Here's June Allen's testimony, about halfway down. If you search for the word 'reactor' you'll jump to it. "Every effort by the coalition on behalf of safety has met with hostility from Federal and State decision-making bodies." "The North Anna fault is wet. clay filled, and surrounded by rock so fractured that stress measurements are impossible." www.archive.orgby Panserbjorne9 8/24/2011 8:54:21 PM
- Complete with OCR failures ;)by RadioGuy 8/24/2011 8:55:03 PM
- @RadioGuy LOLby Panserbjorne9 8/24/2011 8:57:28 PM
- @Panserbjorne9 That ebooks link just below it is a chronology.by RadioGuy 8/24/2011 8:59:41 PM
- From Congressional sub-committee hearings.by RadioGuy 8/24/2011 9:01:03 PM
- enformable.com Finaly I fing a good news ;-)) Wind sector shows strength in Brazil auction. Wind power won 44 projects in the auction, offering 1067 MW, compared to two natural gas projects offering 1029 MW. One hydropower project and a number of biomass projects using bagasse leftover from sugar and ethanol production also won in the auction. www.powerengineeringint.comby Majj 8/24/2011 9:03:00 PM
- @Majj YAY!!by Panserbjorne9 8/24/2011 9:08:12 PM
- by Majj 8/24/2011 9:10:11 PM
Another reactor to be shut down for inspection
A nuclear reactor in Hokkaido, northern Japan, will shut down shortly for regular inspections, leaving over 75 percent of the country's reactors out of service.
Hokkaido Electric Power Company says it will begin reducing the influx of steam into the turbine of the number 2 reactor at the Tomari nuclear power plant on Thursday. The reactor will shut down in the early hours of Friday for 3 months of checkups.
That will bring the number of inactive reactors around the country to 41, or 76 percent of the total number of 54.
Eleven of the inactive reactors were initially scheduled to resume operations after regular checkups have been completed later this month.
But the utilities are now obliged to conduct stress tests as a new government-ordered safety measure. They must also get approvals to restart from local communities.
Three active reactors will also be shut down for regular checkups by September, another 8 by later this year, and the remaining 2 by early next year.
This means that all the reactors in the country could be out of service next spring.
Thursday, August 25, 2011 03:25 +0900 (JST)
www3.nhk.or.jpby Edano 8/24/2011 9:13:35 PM
Japan Earthquake | Page 2229
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