Posted in the Brattleboro Forum
#1 Feb 28, 2013
Why is this plant at 94% for two days?
#2 Feb 28, 2013
Vent system: would probably save the reactor
These guys are shills for the industry...
#3 Feb 28, 2013
So Pilgrim was down to around 80% because of relief valve issues just before the blzzard, a weeek outage, then back up in power, now two days at 94% power....
#4 Feb 28, 2013
I called the Pilgrim antis... to get them to find out what is going on.
#5 Mar 1, 2013
Third day of 94%...
#6 Mar 1, 2013
-one who has come from afar on a journey to a holy place
kinda blasphemous and just plain wrong for nuketards to name their dirtybomb that
same with 'Yankee'
It’s Official, the Fourth Amendment is Dead
This Is How We Resist *Video*
How to handle warrantless Gestapo checkpoints http://www.infowars.com/this-is-how-we-resist...
another great cartoon about the sheeple
meanwhile over in Israel teachers are armed to protect the students http://www.newsmax.com/Newsmax/files/e6/e65da...
^yet libscum here insist that we should not do the same
#7 Mar 1, 2013
#8 Mar 4, 2013
24 HOUR NOTIFICATION OF INOPERABLE SCRAM DISCHARGE VOLUME VALVE BASED ON NRC BULLETIN 80-14
"Scram Discharge Volume (SDV) Valve Declared Inoperable.
"On March 1, 2013 at 1045 hours, with the reactor at 94% core thermal power (CTP), a scram discharge volume valve, CV-302-22B was declared inoperable as required by station procedural direction due to an observed degradation in opening stroke timing during performance of a compensatory surveillance test of the Scram Discharge Instrument Volume Vent and Drain Valve. This report is provided consistent with NRC IE Bulletin 80-14.
"Currently, station engineering is evaluating the valve stroke time trend data of CV-302-22B and plans to address this issue will be developed as part of the Corrective Action Program (CAP). Pilgrim Technical Specification (TS) 3.3.G applies due to the inoperability of CV-302-22B.
"This notification is being made in accordance with the NRC IE Bulletin 80-14,'Degradation of BWR Scram Discharge Volume Capability,' Part A.3., which states,'By procedures, require that the SDV vent and drain valve be normally operable, open and periodically tested. If these valves are not operable or are closed for more than 1 hour in any 24 hour period during operation, the reason shall be logged and the NRC notified within 24 hours (Prompt Notification).'
"A similar event report was generated for the same valve on February 18, 2013. Compensatory measures applicable to the original event report included a revised lubrication application and additional surveillance testing. Although surveillance tests subsequent to the original February 18, 2013 tested demonstrated valve operability, the initial March 1, 2013 test did not meet opening stroke time operability requirements for the valve. Subsequent stroke time testing has met the opening stroke time operability requirements for the valve.
"This event has no impact on the health and safety of the public.
"The USNRC Senior Resident Inspector has been informed."
See similar event EN #48766.
#9 Mar 4, 2013
The SDV is one issue...why they are forced to be at 94% power is another.
So why can't they just remove the bad valve and replace it with a new valve in one day?
#10 Mar 4, 2013
Still at 94% power..
#11 Mar 4, 2013
Ever think maybe Pilgrim is coasting down for a spring refuel?
Good old boring Mikey.
#12 Mar 4, 2013
Refueling coast-down happens generally at approximate a rate of .5% a day or less. On Feb 26 it was 100%, then Feb 27 it became 94%. Since Feb 27 it has been stuck at 94% power. It would be down a 1% or two by now.
Nope, they are restricted to 94% on some issue. And its not reportable. Probably something in the secondary system...the money making end of the plant.
I am positive it is not coast-down
#13 Mar 4, 2013
Well, they are scheduled for April 17, 2013 (4/17/2013)...still 100% sure if it is not for coast-down...
I mean, coast-down is right around the corner...
#14 Mar 5, 2013
#15 Mar 6, 2013
still @ 94% power...
#16 Mar 6, 2013
So i think Pilgrim has replaced the bad safety relief valve, maybe replace the other three...but replace with an identical design as the leaking ones. So as a precaution to have no more leaks, they limited power to 94% till the refueling outage.
They might have just replaced the leaking one...not the other three...but as a precaution...
#18 Mar 6, 2013
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Its annual conferences display the worst of its agenda.
#19 Mar 6, 2013
Pilgrim scram valve fails again
Is this a sign of an aging plant past its prime?
The second “event” at Pilgrim in as many weeks – the failure of a “scram discharge valve”– is also the second time this particular valve has failed in the last two months.
The scram discharge volume valve – referred to in the event releases as CV-302-22B – failed Feb. 18, a week after the blizzard knocked out power to the plant.(In another case of twos, Pilgrim also lost power twice during the strom.). The valve failed again last Friday, March 1.
According to the Union of Concerned Scientists (UCS), the CV-302-22B is one of the valves on the drain line from the scram discharge volume, a metal tank that is supposed to contain all of the water vented during a scram (a sudden, rapid, shut down of the reactor).
“When a scram signal occurs,” the UCS reported,“this valve automatically closes, or is designed to do so. Whether it does so is another matter.”
For critics of the plant, including EcoLaw.org Founder Meg Sheehan, this is a sure sign that the plant is past its prime.
“Pilgrim is old and worn out,” Sheehan wrote on her blog this week.“It presents an unacceptable risk to our region, and this is just one more example of that.”
A 1975 report on reactor safety, widely known as the Rassmussen Report, argues against that conclusion.
That report specifically stated that the valves in question have only a “one in a million” chance of interfering with a reactor shut down.
But the UCS said the Brown’s Ferry Nuclear Power Plant in Alabama must have hit the lottery, because in 1980 a plugged scram discharge valve prevented plant operators from successfully removing all of its control rods, three times, before the reactor staff was able to complete a planned shut down of their reactor.
That event at Brown’s Ferry did not occur during an emergency, however, and the 15 minutes it took to withdraw all of the reactor’s control rods did not, therefore, result in a disaster.
This week’s failure of Pilgrim’s scram valve, the official event notice released by Pilgrim concluded,“has no impact on the health and safety of the public.”
Plant staff had actually been monitoring the valve since it first failed in mid-February.
“A similar event report was generated for the same valve on Feb. 18, 2013,” the event-notification report states.“Compensatory measures applicable to the original event report included a revised lubrication application and additional surveillance testing.”
In other words, Pilgrim has been testing this valve since it first failed.
According to the NRC, the valve was lubricated, retested and restored to operability soon after the issue was discovered.
But tests conducted March 1, Pilgrim stated,“did not meet opening stroke time operability requirements for the valve.”
According to the NRC, during the power outages that shut down the plant twice during the February blizzard, the valve worked properly to support the scram.
#20 Mar 6, 2013
“That is, it closed within the timeframe necessary to support the scram,” NRC spokesman Neil Sheehan told the Old Colony.
“The problem resulting in the report on Feb. 18 was discovered,” Neil added,“during routine surveillance testing conducted on these valves in the ‘open’ direction and was unrelated to any of the shutdowns.”
The NRC spokesman acknowledged that this valve plays an important role in supporting the scram function.
“That said, nuclear power plants have numerous systems and components that are important to safety,” Neil said.“The ‘defense-in-depth’ approach for nuclear power plants is based on multiple layers of safety through redundant systems and equipment.”
Neil wouldn’t comment directly on the assertion that the problems with this valve were related to the plants overall age.
“The company (Entergy) is continuing to evaluate the exact cause of the slowness of the valve to operate in the open direction,” Neil concluded.“Our inspectors will review the results of that review.”
#21 Mar 7, 2013
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