breezy

PROBLEM NUCLEAR PLANTS

163 posts in this topic

In the last couple days Gulfie and I have become aware of nuclear plants in the US that have had problems recently.  It was then decided that it might be a good thing to make others aware of potentially dangerous situations arising from nuclear plants, I"m sure some of you live in close proximity to these plants.  I can't help but think about Japan's Fulushima plants and how we never realized it could become a concern for us, but it did. I would like anyone who hears about a problematic nuclear power plant to note it here in this thread.  It doesn't hurt for us all to be aware of these situations, be it in the US, or in the world.

NRC investigates reactor coolant system leak at Brunswick plant

11/16/11

BRUNSWICK COUNTY, N.C. — Energy officials and environmentalists are reacting to reports of a reactor coolant system leak at Progress Energy's Nuclear Plant in Brunswick County.

According to Progress Energy, early Wednesday morning the plant reported an unusual plant event to the Nuclear Regulatory Commission. Environmentalist Tom Clements with Friends of the Earth, tracks nuclear issues primarily in South Carolina and Georgia."

snip

Mosier said they believe radioactive water is leaking from the top of the vessel.

"The leak is contained within the containment structure and through the different vessel drain pumps and drain systems inside the reactor," said Mosier.

"Mosier said at this point they are investigating the cause of the leak but said there are no threats to the environment or people. At this point, Clements said he just wants to make sure that they keep the public informed."

"The NRC said their own onsite inspectors are looking into the problem and will decide what needs to be "

http://triangle.news14.com/content/local_news/649671/nrc-investigates-reactor-coolant-system-leak-at-brunswick-plant

Davis-Besse and Brunswick Nuclear Plants Experience Problems Wednesday Morning

11/17/11

"The Davis-Besse nuclear plant in Ohio declared an alert for just over two hours Wednesday morning following a small fire on site.

An event notification report from the Nuclear Regulatory Commission said that a leaking water pipe caused a breaker to arc in an auxiliary building. Because the incident affected an emergency ventilation fan in the control room, at 2:22 a.m. plant operator FirstEnergy declared an alert – the second lowest of the NRC's emergency statuses.

Plant personnel quickly extinguished the fire. The NRC noted it did not affect core cooling or power supplies to the Babcock & Wilcox pressurized water reactor, which has been shut down for a reactor pressure vessel head replacement since Oct. 1."

3531.brunswick.jpg

http://nuclearstreet.com/nuclear_power_industry_news/b/nuclear_power_news/archive/2011/11/17/davis_2d00_besse-and-brunswick-nuclear-plants-experience-problems-wednesday-morning-111701.aspx

New crack at Crystal River nuclear plant casts doubt on repair plan

11/20/11

"On July 26, monitors detected something amiss in the already crippled building that shields the reactor at Progress Energy's nuclear plant. The pile of shattered concrete outside meant the utility faced a new problem.

The building was still falling apart — a development Progress was in no hurry to reveal to state regulators.

The incident marked the third time since 2009 that the containment building at the Crystal River plant had suffered major structural damage."

snip

"That the building continues to develop structural flaws raises the stakes on Progress' next move ."

snip

"They examined Progress' efforts to deal with the first two cracks — one from October 2009 and one from March of this year.

On July 26, according to the NRC report, "monitors indicated a high level of acoustic activity'' in the containment building. Progress workers found an area of broken concrete 3 to 4 feet wide and 12 feet long.

On Aug. 8, Progress gave an update on the situation at Crystal River to Florida's Public Service Commission, which is reviewing how much, if any, of the charges related to the repair can be passed on to customers.

Progress made They examined Progress' efforts to deal with the first two cracks — one from October 2009 and one from March of this year.

On July 26, according to the NRC report, "monitors indicated a high level of acoustic activity'' in the containment building. Progress workers found an area of broken concrete 3 to 4 feet wide and 12 feet long.

On Aug. 8, Progress gave an update on the situation at Crystal River to Florida's Public Service Commission, which is reviewing how much, if any, of the charges related to the repair can be passed on to customers.

Progress made no mention of a possible third crack.

Yet, on the same day, Progress filed its annual report to the U.S. Securities and Exchange Commission. In that report, the utility said "additional cracking or delaminations may have occurred or could occur during the repair process."

snip

"Engineers spent months conducting extensive testing ... to determine the extent of the condition," Grant said in an email to the Times. "That investigation and analysis concluded a few days ago. Now, with all the facts available, we presented a formal update to the PSC."

"Progress did not describe the third crack as bad news. Its report to the PSC last week said it "validates decisions announced in June 2011 regarding the company's containment repair plan'' to replace all of the walls in the broken building.

The plan, Progress said, would adequately fix the third crack."

snip

Six 42-inch-thick concrete panels form the walls of the containment building — the final barrier against deadly radiation escaping into the atmosphere during an accident. Three of those panels have suffered serious cracking, or "delaminations'' in engineer-speak.

Panel 3 broke in October 2009, as workers cut a 25-by-27-foot hole in the concrete wall to replace steam generators inside the building.

Panel 5 broke in March after Progress repaired panel 3.

Panel 1 broke in July, while Progress tried to figure out how to repair panel 5.

The sequence of events leads a nuclear engineer with the Union of Concerned Scientists to question Progress' competence.

"It was broken initially,'' said Dave Lochbaum, a frequent critic of the nuclear industry. "After very careful review, it was broken, again."

snip

"Progress' latest plan, to replace all six panels with stronger ones, has never before been attempted. That would continue a pattern of costly firsts that has marked the project from the outset.

• Progress was the first U.S. utility to self-manage this kind of steam generator replacement, believing that doing so would save money. Two engineering firms, Bechtel Corp. and SGT, successfully completed all 34 previous jobs. Progress' project was the first to fail.

• Progress used a different procedure to cut into the containment building. Despite warnings from on-site contract workers, it went ahead with its plans. Delaminations did not occur during any of the previous steam generator replacements.

• Progress attempted a first-of-its-kind repair. It failed; in fact, it led to the second crack.

• Progress' repair plan — replacing all six containment building panels, one of which is already in place — has also never before been attempted.

"Critics say Progress' plan is a bad idea. They argue the entire 35-year-old containment building needs to go."

snip

"It's an economic problem," Kindinger said. "What can they do at an affordable price?"

To that point, Gundersen said the cost to build a new structure would not be much different than the cost of Progress' plan to fix the existing one, which could become a never-ending process.

"They're going to chase cracks for years," Gundersen said. "They're going to be chasing cracks until they completely destroy the containment and build a new one."

"The construction cost of a brand new building might be about the same as repairing the old one. But replacing the building entirely could further delay restarting the plant. Each year the plant is offline currently costs at least $300 million to replace the cheap electricity the nuclear plant used to generate."

http://www.tampabay.com/news/business/energy/article1202505.ece

So there you have it folks, since Nov. 16, 2011 there have been problems at Nuclear facilities in Ohio, North Carolina, and Florida.

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High quality global journalism requires investment. Please share this article with others using the link below, do not cut & paste the article. See our Ts&Cs and Copyright Policy for more detail. Email ftsales.support@ft.com to buy additional rights. http://blogs.ft.com/energy-source/2011/03/16/the-nuclear-world-interactive-map/#ixzz1eEnF5T2F

The nuclear world: interactive map

March 16, 2011 5:59 pm by Rob Minto

The FT’s Analysis page is all about nuclear power, so to accompany it we have created an interactive map (running on Google fusion tables), with the location of every reactor in the world. Zoom in, and click on the dots to see details.

http://blogs.ft.com/energy-source/2011/03/16/the-nuclear-world-interactive-map/#axzz1eEmzjZQ6

And here is a listing from the WNA Nuclear Database for the USA

http://world-nuclear.org/NuclearDatabase/rdResults.aspx?id=27569

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Well, lets hope that one of our members 'hint' that many or most sites will be closed down over the next decade comes true.

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Nuclear Event in USA on Wednesday, 28 December, 2011 at 15:38 (03:38 PM) UTC.

RIVER BEND NUCLEAR PLANT in LOUISIANA

The reactor at the River Bend nuclear plant in Louisiana shut down automatically after an issue in the turbine caused safety systems to trip. River Bend nuclear plant. Source: NRCAccording to an event notification report filed with the Nuclear Regulatory Commission, the shutdown caused the reactor protection system to activate, and the reactor's water level briefly dropped. Per the system's design, containment isolation valves in the boiling water reactor's suppression pool cooling system closed. Reactor core isolation cooling operated manually for about 1 minute. The shutdown from 100 percent power was uncomplicated, according to the NRC. Plant operators are conducting an investigation into the reactor trip, which the report indicated was caused by a loss speed sensor in the turbine. Entergy operates River Bend, near Baton Rouge, La. The plant uses a single General Electric boiling water reactor with Mark III containment at the plant generating 989 megawatts, according to the NRC.

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=NC-20111228-33567-USA

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Nuclear power plant mishap: heating off

A breakdown on the grounds of the Czech Temelin nuclear power plant has cut off thousands of people from heat and hot water.

After more than 12 hours technicians could restore the supply with district heat from the nuclear power plants again. In the nuclear power plant, a pipe had burst, which had to be replaced.

The downbreak (?) of the heater affected a retirement home and a polyclinic, at temperatures just above 0 degrees Celsius. Around 4,500 people were sitting in the cold.

http://www.radio-trausnitz.de/default.aspx?ID=6369&showNews=1092183

I translated it from German to English

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Nuclear power plant mishap: heating off

A breakdown on the grounds of the Czech Temelin nuclear power plant has cut off thousands of people from heat and hot water.

After more than 12 hours technicians could restore the supply with district heat from the nuclear power plants again. In the nuclear power plant, a pipe had burst, which had to be replaced.

The downbreak (?) of the heater affected a retirement home and a polyclinic, at temperatures just above 0 degrees Celsius. Around 4,500 people were sitting in the cold.

http://www.radio-trausnitz.de/default.aspx?ID=6369&showNews=1092183

I translated it from German to English

Thanks for your contribution Nandina and welcome to the CHANI club.

Hoping to see more from you  ;D

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Yes Nandina welcome and any info on what is currently happening in the Nuclear area is most welcome because often it is swept under the carpet...

Great to have you here...  8)

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2 Problematic US N. Power Plants in December-

1. Plymouth N. Power plant evacuated whole plant due to leak

2. Nine Mile N. Power plant evacuated whole plant due to leak in drywell

(post links later)

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Ill. Nuclear Reactor Loses Power, Venting Steam

Byron, Ill  January 30, 2012

"A reactor at a nuclear plant in northern Illinois has shut down after losing power.

Exelon Nuclear says steam is being vented at its Byron Generating Station to reduce pressure. Plant operators say the unit is safe.

They declared an unusual event at 10:18 a.m. Monday, when Unit 2 shut down after losing power from an off-site source. They say the facility's generators are providing power to equipment.

Officials say Byron Station is designed to vent steam in the event of a power loss. They say the steam contains low levels of tritium, a radioactive isotope, but not at unsafe levels.

Officials say engineers are investigating why the unit lost offsite power. Unit 1 continues to operate normally.

Byron Generating Station is about 95 miles northwest of Chicago."

http://abcnews.go.com/US/wireStory/ill-nuclear-reactor-loses-power-venting-steam-15474360

tx gulfie

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California Nuclear plant shuts down reactor as precaution

By Steve Gorman Posted Tue Jan 31, 2012 10:15pm PST

"LOS ANGELES (Reuters) - One of two reactors at the San Onofre nuclear power station in Southern California was shut down on Tuesday after a small leak was detected in a steam generator tube, but the incident posed no risk to the public or plant workers, the facility operator said.

The reactor unit, which normally provides 1,100 megawatts of electricity, was shut down at about 5:30 p.m. local time as a precaution and will remain off line for a least a couple of days, said Gil Alexander, a spokesman for Southern California Edison.

The plant's only other reactor already had been deactivated for a scheduled refueling and technology upgrade, he said. But the utility has ample reserve electricity, which it buys from independent power producers, to continue meeting customer demands while the two reactors are off line, the company said.

"We don't expect any impact on our customers tomorrow," Alexander told Reuters."

Read more at.....

http://green.yahoo.com/news/nm/20120201/us_nm/us_california_nuclear_shutdown.html?utm_medium=twitter&utm_source=twitterfeed

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"Southern California Edison, operator of the San Onofre Nuclear Generating Station near Camp Pendleton, announced tonight it has begun a precautionary shutdown of Unit 3 because sensors detected a possible leak in one of the unit's steam generator tubes. "The potential leak poses no imminent danger to the public or plant workers," according to an SCE statement. There has been no release to the atmosphere." San Onofre personnel will evaluate the cause of the leak and the steps required to repair it and resume operations, according to a spokesman for the Rosemead-based utility. Unit 2 is currently offline for a planned maintenance, refueling and technology upgrade outage. SCE has ample reserve power to meet customer needs while Unit 3 is offline, according to the spokesman. The Nuclear Regulatory Commission was immediately informed of the shutdown, SCE reported.

New 640-ton steam generators were installed in 2010 in the north dome and the ones in the south dome were replaced in 2009 as part of a $674-million program to upgrade the plant's four steam generators, which make steam to turn the electric turbines. It is not clear from initial reports what part of the steam generator could be leaking, but there are two courses of water sealed off from one another within the generator. The water that actually touches the radioactive fuel rods is sealed in a series of tubes that, in turn, transfer heat to boil water in the second course. That non-radioactive water becomes the steam that turns the massive turbine blades. A third course of seawater condenses the steam in another part of the plant. The plant is set to shut itself down at the first sign of problems, as it did in response to the massive blackout that plunged Southern California into darkness in September."

http://hisz.rsoe.hu/alertmap/site/?pageid=event_desc&edis_id=NC-20120201-34007-USA

http://hisz.rsoe.hu/alertmap/site/?pageid=event_summary&edis_id=NC-20120201-34007-USA

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Home / News / Local News / Oceanside / SAN ONOFRE: Worker at nuclear plant fell into reactor pool last week

SAN ONOFRE: Worker at nuclear plant fell into reactor pool last week

A worker at San Onofre Nuclear Generating Station fell inside the plant's Unit 2 reactor pool last week, but officials determined he did not suffer significant radiation exposure.

<snip>

he pool is more than 20 feet deep and holds water that continually circulates through the reactor core.

Workers already had removed the highly radioactive uranium fuel that normally sits at the bottom of the pool, officials said.

Without the fuel present, the most likely source of deadly radiation would be stray fuel particles that could have been floating in the water, said Nuclear Regulatory Commission spokesman Victor Dricks.

<snip>

Edison officials called the NRC to tell them about the fall, Dricks said, but the incident did not appear on a regular list of incident notifications that all nuclear operators must make to the NRC.

Dricks said it was not technically a reportable incident under federal rules. The incident would have been reportable if the worker had received a radiation dose greater than 5,000 millirem, he said. 

<snip>

http://www.nctimes.com/news/local/oceanside/san-onofre-worker-at-nuclear-plant-fell-into-reactor-pool/article_519d459c-19f4-55ed-87c6-8131872e6760.html

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Los Angeles-area Meltdown: Cesium-137 still up to 1,000 times higher than standard — Plutonium also detected — Located between Chatsworth and Simi Valley

"Some levels of radioactive chemicals found on a portion of the Santa Susana Field Laboratory site were as much as 1,000 times higher than standards, according to federal data released on Monday.

Acting as an independent monitor, officials with the U.S. Environmental Protection Agency conducted radiological surveys on a portion of the land known as Area IV, where a partial meltdown of a nuclear reactor occurred in 1959.

That portion is currently overseen by the Department of Energy.

The results of the radiological survey show that of the 437 samples collected, 75 exceeded standards agreed upon by the DOE and the California Department of Toxic Substances Control in a cleanup agreement signed in December 2010.

Seven radioactive isotopes, including one known as cesium-137, measured at levels between 100 to 1,000 times higher than the standards. Other radionuclides that suggest nuclear presence include strontium-90, tritium, plutonium, and carbon-14.

The recent data is significant to residents, activists and public officials who have fought for years for the removal of radiation and chemical contaminants at the former Rocketdyne site, which is nestled in the hills between Chatsworth and Simi Valley and was purchased by the Boeing Co. in 1996.

The numbers provides hard evidence that not only do the radioactive materials exist, but that the levels are higher than expected.

"This confirms what we were worried about,"

said Assemblywoman Julia Brownley, D-Santa Monica, who has sought a complete cleanup of the former Rocketdyne rocket engine testing laboratory. Brownley released the data to the public on Monday.

"This begins to answer critical questions about what's still up there, where, how much, and how bad," she said in a statement.

Brownley called the findings "extremely disappointing, especially because the site has already undergone two cleanup efforts by its owner, The Boeing Co., and the Department of Energy. Each declared the land fully cleaned."

A spokesman for the Department of Energy didn't say if the agency was surprised or disappointed by the levels, but that clean-up would continue.

"We really are still looking at the data," said John Jones, federal project manager with the DOE. "The bottom line is we will clean up as we agreed to in our committment to the 2010 Administrative Order on Consent for Remedial Action."

Boeing officials emphasized that they have completed significant cleanup activities alongside the DOE and NASA, which also owns a portion of the land.

"The preliminary data does not pertain to the portions of the site that Boeing is responsible for cleaning up," Boeing officials said in a statement.

"We continue to be open to working with the EPA, the Department of Energy, NASA and the state to find the most effective ways to clean up Santa Susana and preserve the land for future generations."

Officials with the state Department of Toxic Substances Control would not say if the levels found at the site posed an immediate danger.

"When we deal with things, we deal with long term risk exposure," said Mark Malinowski, with the DTSC.

A final report on the radiological survey is expected at the end of the year, Malinowski said.

But activists reacted similarly to Brownley, saying the data prove that prior clean up efforts were ineffective. They wonder what else can be brewing within the rocks, the earth, and the groundwater within the 2,849-acre property.

"People have been waiting for this information for years," said Dan Hirsch, president of the activist group Committee to Bridge the Gap.

"All those years, we were told it was clean. This data prove we're not just a bunch of unknowledgeable people, but that everyday people are proven right."

There was some victory in 2010 when both the DOE and NASA agreed to adhere to a high level of clean-up standards mandated under state bill 990.

However, Boeing officials said that decontaminating its property to those standards would destroy the natural resources on the site. A federal judge agreed with Boeing last year.

But the EPA's recent findings prove that all past remediation efforts have failed, said Denise Duffield, executive director for Physicians for Social Responsibility-Los Angeles.

"These are remarkable findings," Duffield said. "The new EPA data show extensive radioactive contamination remaining at the site and underscores the need for the site to be cleaned up to background without delay."

Source:

http://www.contracostatimes.com/california/ci_20108641/rocketdyne-radiation-is-still-abundant

MORE HERE AT "ENEWS":

http://enenews.com/los-angeles-area-meltdown-cesium-137-up-to-1000-times-higher-than-standard-plutonium-also-detected-between-chatsworth-and-simi-valley

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Aftershock triggers “unusual event” declaration at North Anna

Rusty Denne

n

March 26, 2012

"Once again, an aftershock from last summer’s earthquake prompted operators at North Anna Power Station in Louisa County to report an “unusual event” to the Nuclear Regulatory Commission. Richard Zuercher, a spokesman for Dominion power, says a report is filed with the NRC  if the tremor is felt in the control room."

http://blogs.fredericksburg.com/waterearthsky/2012/03/26/aftershock-triggers-unusual-event-declaration-at-north-anna/

7 months later still having aftershocks..

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Nuclear Event in France on Thursday, 05 April, 2012 at 15:52 (03:52 PM) UTC.

"Fire crews have been rushed to a nuclear reactor in northern France after an escape of smoke but the energy company EDF says the site is secure. It said 10 fire engines were working at the Penly site near Dieppe, where the reactor was shut down after the alarm was raised at 12:20 (11:20 GMT). Nobody has been hurt in the incident, the company added. France obtains 75% of its electricity from nuclear power and the industry's future has become a political issue."

It's classified as level 1 nuclear incident by INES.

Source: RSOE EDIS

http://hisz.rsoe.hu/alertmap/site/?pageid=event_summary&edis_id=NC-20120405-34779-FRA

*No copyright infringement intended.

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Fire at Catawba Nuclear Power Plant in vital battery room area

April 3, 2012

Catawba-600x480.jpgenformable.com

Event Number: 47795

“At 0624 EDT on 04/02/2012 the control room was notified by a plant operator that there was a fire in the plant vital battery room area on Unit 2. The fire was located in the lower compartment of inverter 2KUI.

This equipment supplies power to 120V AC non-safety related components. The fire brigade captain was dispatched along with the site fire brigade. When the fire brigade captain arrived the operator was staged near the inverter with a CO2 [carbon dioxide] fire extinguisher. The fire brigade captain instructed the NLO [non-licensed operator] to extinguish the fire with the extinguisher. The fire was immediately extinguished once the CO2 was applied from the extinguisher. At 0633 EDT the fire brigade captain reported to the control room that the fire was extinguished. Upon further investigation it appears that transformer in the lower compartment of the inverter had caught fire.

The fire was confined to the lower compartment of the inverter and did not affect any other components in the area. Due to the loss of the inverter the loads automatically swapped to the alternate AC source as designed and no indications or equipment were lost due to the loss of the inverter"

“At the time of this event Unit 1 was at 100% power and Unit 2 was shutdown in Mode 6 with reactor coolant system drained to 8% level with 2B Residual Heat Removal pump supplying core cooling.

There was no impact to either unit as a result of this event. All equipment required to maintain core cooling, AC and DC power, and reactor coolant inventory on Unit 2 was maintained during this event. [emphasis added]“

The licensee notified the NRC Resident Inspector."

http://enformable.com/2012/04/fire-at-catawba-nuclear-power-plant-in-vital-battery-room-area/

This plant was a problem last December...now again...

Catawba Nuclear Station – Loss of control room chillers    from December 16, 2011

http://enformable.com/2011/12/catawba-nuclear-station-loss-of-control-room-chillers/

then this one too

Byron Nuclear Station Reactor 2 still offline Tuesday morning    from Jan 31, 2012

width=500 height=388http://enformable.com/wp-content/uploads/2012/01/Byron-Nuclear-600x465.png[/img]enformable.com

"The Byron Nuclear Station Reactor 2 was still offline Tuesday morning as repairs begin on a switch that failed, an Exelon official said.  Officials are investigating the events surrounding a power failure at a nuclear reactor in northern Illinois, where steam was vented to reduce pressure after it shut down."

http://enformable.com/2012/01/byron-nuclear-station-reactor-2-still-offline-tuesday-morning/

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Southern Ukraine Nuke plant shut down

I'm having trouble finding the source page.

I have read about this in Japanese page http://mainichi.jp/select/news/20120418k0000m030159000c.html and it states the original article in Tass.

The transformer failed and high voltage lines reacted and shut down has occurred.

Their Dept of Emergency (!!...I guess they had set this up since Chernobyl...) stated there's no radioactive substance leakage happened. 

The article should be somewhere in here, I believe...

http://www.itar-tass.com/en/c32.html

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FIRE AT SAN ONOFRE NUKE PLANT EXTINGUISED

April 20, 2012

Fire At Troubled California Nuclear Plant Extinguished

By Cassandra Sweet

Of DOW JONES NEWSWIRES

"Edison International'S (EIX) southern California utility said Friday that a fire at the San Onofre nuclear power plant, which has been shut for months over equipment problems, was extinguished.

The fire ignited in an electrical panel in the "non-radiological side" of one of the plant's two units, said Edison, which operates the plant and co-owns it with Sempra Energy's (SRE) San Diego utility. The plant's fire department put out the blaze a few minutes before 1 p.m. local time, less than an hour before it started, the company said. <<proofreading 101

The plant, located on the coast between Los Angeles and San Diego, has been shut since Jan. 31 when a steam tube ruptured and released radioactive steam. The Nuclear Regulatory Commission said the radiation levels weren't dangerous."

http://ex-skf.blogspot.com/2012/04/fire-at-san-onofre-nuke-plant.html

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Workers still at risk decades after Chernobyl blast

Date: Apr 27, 2012

"With the memorial ceremonies over for another year, the hard work of building a new permanent shelter to secure the stricken Chernobyl nuclear plant has begun.

snip

“Because of the construction work they’ve dug down to the level where the nuclear fuel and graphite lay. As a result the level of radioactivity in the air has risen. While the work is going on the level of the radioactivity in the air exceeds the sanitary norm by hundreds, perhaps thousands of times,” warned construction expert Yuri Andreyev.

snip

Euronews reporter Angelina Kariakina said: “The experts believe the encasement doesn’t solve the main Chernobyl problem, that of the nuclear waste inside the demolished reactor. But there is currently no chance of moving it to a safer storage facility.”

http://www.euronews.com/2012/04/27/workers-still-at-risk-decades-after-chernobyl-blast/

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Emergency declared at New Jersey nuclear plant

May 1, 2012

Multiple fire alarms sound after reactor shuts down — Tests were occurring on emergency cooling system — Cause remains under investigation

Title: ‘Unusual event’ declared at Salem 1 nuclear reactor after plant automatically shuts down

Source: NJ.com

Author: Bill Gallo, Jr.

Date: Apr. 30, 2012 2:12p ET

"An “unusual event” was declared at the Salem 1nuclear reactor here this morning after the plant shut down and fire alarms sounded, a spokesman for the plant’s operator said.

An unusual event is the least serious of four emergency classifications at a nuclear power plant.

Salem 1 automatically shut down at 10:15 a.m., according to Joe Delmar, spokesman for the reactor’s operator, PSEG Nuclear.

According to Delmar what caused the reactor to trip remains under investigation, but testing was occurring on the reactor’s emergency cooling system at the time.

After the reactor shutdown, multiple fire alarms sounded, according to Delmar. [...]

The reactor is stable, Delmar said, and there was no release of radiation during the event."

http://enenews.com/emergency-declared-at-new-jersey-nuclear-plant-multiple-fire-alarms-sound-after-reactor-goes-into-shut-down-tests-were-occurring-on-emergency-cooling-system-cause-remains-under-investigation

10925515-large.jpg

'Unusual event' declared at Salem 1 nuclear reactor after plant automatically shuts down

"LOWER ALLOWAYS CREEK TWP. — An “unusual event” was declared at the Salem 1 nuclear reactor here this morning after the plant shut down and fire alarms sounded, a spokesman for the plant’s operator said.

An unusual event is the least serious of  four emergency classifications at a nuclear power plant.

Salem 1 automatically shut down at 10:15 a.m., according to Joe Delmar, spokesman for the reactor’s operator, PSEG Nuclear.

According to Delmar what caused the reactor to trip remains under investigation, but testing was occurring on the reactor’s emergency cooling system at the time.

After the reactor shutdown, multiple fire alarms sounded, according to Delmar."

read the whole story here....

http://www.nj.com/salem/index.ssf/2012/04/unusual_event_declared_at_sale_1.html

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Details sketchy on radioactive leak at Ohio nuclear plant: Officials unsure how much leaked or for how long — “I can tell you that it had not been an overly long time” (AUDIO

June 8, 2012

Davis-Besse fixing leak

WKSU

June 8, 2012

"Nuclear regulators and plant operators say the leak was in a line to a pump that pushes water through the reactor. The plant had been shut down for re-fueling when it was discovered Wednesday.

FirstEnergy spokeswoman Jennifer Young says the water never got outside the building and posed no threat to the public.

“We were in the process of beginning to restart the plant when the issue was uncovered. I can tell you that it had not been an overly long time that it had been leaking, because we had just started pressurizing the plant within the previous 24 hours. It was definitely not leaking before the plant was pressurized, and it wasn’t leaking in the early stages of pressurization.”

Young estimates the water leaked at a rate of about six gallons per hour, but is unsure of the total."

http://enenews.com/details-sketchy-on-radioactive-leak-at-ohio-nuclear-plant-officials-unsure-how-much-leaked-or-for-how-long-i-can-tell-you-that-it-had-not-been-an-overly-long-time-audio

Indian Point reactor shut down

June 8, 2012

due to copywrite....can't put it here...

http://www.myfoxny.com/story/18719931/indian-point-reactor-shut-down

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5 U.S. Nuclear Reactors Shutdown in Past 3 Days - Various Issues; NRC Claims "Coincidental"

5 U.S. Nuclear Reactors Shutdown in Past 3 Days - Various Issues; NRC Claims "Coincidental"

"Published on Aug 15, 2012 by Sheilaaliens

http://sheilaaliens.net/?p=1048

1. Minnesota - Prairie Island - Shutdown Aug. 14

2. Minnesota - Monticello - Shutdown Aug. 14

3. Maryland - Calvert Cliffs - Shutdown Aug. 12

4. Michigan - Palisades - Shutdown Aug. 12

5. (forgot to include in the video, ty for the reminder @Socksee)

Connecticut - Millstone Power Station - Shutdown Aug. 12

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1. & 2. Xcel Energy said Tuesday it has shut down two of Minnesota's three nuclear reactors for what it called minor repairs.

One of the two nuclear generators at the Prairie Island plant was shut down because its emergency diesel generators suffered exhaust leaks.

The Monticello nuclear plant's single generating unit, which had been operating at 10 percent capacity since last weekend, was shut down because of a leaking pipe inside the plant's concrete containment structure, the company said.

http://www.startribune.com/local/west/166203366.html?refer=y

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3. Operators of the Calvert Cliffs nuclear power plant in Southern Maryland have shut down one of the two reactors there because a control rod unexpectedly dropped into the reactor core, causing a reduction in power generation, a plant spokesman said Monday.

http://articles.baltimoresun.com/2012-08-13/features/bs-gr-calvert-nuclear-sh...

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4. The 793-MW unit was shut after a leak was identified Aug. 12. Since July, the NRC has been monitoring a gradual increase of unidentified leakage at the reactor and sought safety assurances from Entergy on those leaks.

http://in.reuters.com/article/2012/08/15/utilities-operations-entergy-palisad...

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5. HARTFORD, Conn. — Connecticut's nuclear power plant shut one of two units on Sunday because seawater used to cool down the plant is too warm.

http://www.washingtonpost.com/business/excessively-warm-water-after-hot-july-...

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23 nuclear power plants are in tsunami risk areas

Sept 21, 2012

"This shows Fukushima after a tsunami in March 2011. Credit: IAEA The tsunami in Japan in March 2011 unleashed a series of negligence related with the resulting nuclear disaster. A scientific study headed by Spanish researchers has for the first time identified those atomic power plants that are more prone to suffering the effects of a tsunami. In total, 23 plants are in dangerous areas, including Fukushima I, with 74 reactors located in the east and southeast of Asia."

snip

"In the study published in the 'Natural Hazards' journal, the researchers drew a map of the world's geographic zones that are more at risk of large tsunamis. Based on this data, 23 nuclear power plants with 74 reactors have been identified in high risk areas. One of them includes Fukushima I. Out of them, 13 plants with 29 reactors are active; another four, that now have 20 reactors, are being expanded to house nine more; and there are seven new plants under construction with 16 reactors."

http://phys.org/news/2012-09-nuclear-power-tsunami-areas.html

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