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Nuclear Reactors

The nuclear industry is more than 50 years old. Its history is replete with a colossal financial disaster and a multitude of near-misses and catastrophic accidents like Three Mile Island and Chornobyl. Beyond Nuclear works to expose the risks and dangers posed by an aging and deteriorating reactor industry and the unproven designs being proposed for new construction.

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Entries by admin (492)

Wednesday
Apr112018

Decommissioning nuclear power plants need an “autopsy” to measure the effects of aging and degradation on safety

Section of Davis-Besse reactor pressure vessel head that was harvested for study of extensive corrosion and " hole-in the head."Beyond Nuclear and two New Jersey groups (Clean Water Action NJ and GRAMMES) have called on the U.S. Nuclear Regulatory Commission (NRC) and Exelon Generation to conduct an “autopsy” on the Oyster Creek once the nation’s oldest operating nuclear power station  permanently closes in October 2018. During Oyster Creek's decommissioning process, the groups want the federal regulator to oversee a “strategic harvest” of materials from the reactor's safety systems, structures and components to gather observable and measureable scientific data on the effects of aging on the 47-year old reactor.

The operational environment of a nuclear power station is very harsh involving the prolonged exposure of materials to extremely high pressure and temperatures, the bombardment with radiation, vibration, fatigue and corrosion.  Oyster Creek is the first operational GE Mark 1 boiling water reactor in the U.S. fleet of 21 similarly designed reactors still in operation. Oyster Creek's GE design is identical to Japan’s now destroyed Fukushima Daiichi nuclear reactors. The groups assert that an autopsy needs be performed on permanently closed nuclear power plants to collect samples of irradiated steel and concrete from safety-related components and structures for laboratory analysis of the effects of aging on those reactors still operating.  

To date surprising few laboratory samples and archival material has been harvested from closed U.S. reactors.  The Zion nuclear power station in Illinois has harvested samples from the reactor pressure vessel and the Crystal River nuclear power in Florida has provided sections of electrical cable to scientifically exam and measure the effects of aging on safety-related materials to gain insight on residual safety margins and how that relates to similar materials in reactors still operating. For example, samples can be taken from Oyster Creek and then analyzed to better access the material condition of another  Exelon Generation still operating GE Mark I reactor, Peach Bottom, that  extend power operations out to 80 years.

The NRC gave a presentation in 2015 that attributes the present dearth of scientific data points the effects of aging on the lack of reactor sites undergoing decommissioning. Presently, 10 reactor units in the US have completed decommissioning and 20 additional units are in process and potentially for decades yet to come. That same presentation states that in anticipation of strategically harvesting safety-related samples from nuclear power stations, the NRC has already prepared a list of 3863 components (2203 from pressurized water reactors and 1603 from boiling water reactors) for the analysis of 16 different age-related degradation mechanisms. 

However, the industry has been reluctant to cooperate with NRC requests for voluntary harvesting. One criticial opportunity arose in the 1990's when the Yankee Rowe nuclear power station in Massachusetts permanently closed with the discovery of a severely embrittled reactor pressure vessel. During decommissioning, Yankee Atomic Power Corporation declined a request from NRC staff to harvest metal samples from the reactor pressure vessel wall for analysis on embrittlement. Instead, Yankee Atomic decommissioned the reactor, filled the vessel with nuclear waste and low-density concrete and shipped it whole to Barnwell, SC for burial without providing a single sample. 

Thursday
Feb222018

Earthquakes send “wake-up” calls for nuke hazards at Seabrook and Indian Point

Two separate earthquakes in New York and New Hampshire are significant wake-up calls to address the continued operation of nuclear power plants with existing vulnerabilities and significant radiological hazards at the Indian Point (NY) and Seabrook (NH) stations. On February 7, 2018, an early morning earthquake (2.2 magnitude) rumbled through portions of Westchester and Putnam Counties where the Indian Point 2 & 3 nuclear power station is co-located with a giant fracking gas pipeline, and maybe a pipe-bomb generated by a large earthquake that ruptures the gas line and creates an ignitiion source. Then on Friday February 16th, another tremor (2.7 magnitude) shook portions of southern New Hampshire and Massachusetts around the Seabrook nuclear power station and the concrete containment structure is already crumbling like a bridge overpass. The recent earthquakes under these two reactor sites underscores the money-for-risk we are collectively gambling versus the unacceptable consequences of a severe accident.

Indian Point sits on intersecting fault lines along the Ramapo Earthquake Fault Zone and right next to a 42-inch diameter fracking gas pipeline. The threat of a large earthquake affecting the operations of the nuclear power station and/or its adjacent gas pipeline continues to mobilize public opposition to the combined threat. Columbia University’s Lamont-Doherty Earth Observatory believes this fault zone can produce a 7-magnitude earthquake. A section of the gas pipeline that traverses the reactor site comes as close as 105-feet to one of the reactor’s critical safety-related structures. Independent analyses estimate an explosion on the high-pressure pipeline could produce a blast radius of 4000-feet. Even though Indian Point is scheduled to cease operations by 2021, the risk of a combined catastrophe exists from thousands of tons of highly radioactive nuclear waste still packed into high-density storage pools, with nowhere to go.  

Nine days later, a 2.7 magnitude earthquake shook the 10-mile emergency planning zone for New Hampshire and Massachusetts communities around the Seabrook nuclear power station.  Seabrook Station is under international scientific scrutiny as the first U.S. reactor to be identified with degradation of safety-related concrete structures including the reactor’s foundation, the pressure containment and its irradiated fuel storage pool, that are damaged and weakened by alkali silica reaction (ASR).  Water intrusion into the concrete structures is chemically reacting with cement compounds to create an expansive gel and microscopic cracking. After nearly 27-years of operation, the age-related cracking has already resulted in an estimated 30% loss of compression and tensile strength in portions of the concrete. Even small earthquakes can accelerate the cracking induced by the chemical reaction further weakening structures vital to containing the inherent danger of nuclear power. Seabrook Station is in the middle of a twenty-year license renewal battle before the U.S. Nuclear Regulatory Commission. A public safety group, otherwise focused on the independent radiological monitoring of the nuclear power station, the C-10 Education and Research Foundation, is challenging the reactor’s operating license extension. C-10 has won standing and contentions before the NRC licensing board for a hearing on safety concerns from unmanaged ASR degradation.Natalie Hildt-Treat, executive director of C-10, was quoted, “You would think a measurable earthquake would put further stress on that,” she said. “Little cracks can lead to bigger cracks ... it’s definitely a safety concern.”

Friday
Feb162018

Troubles at Perry nuclear power plant in northeast Ohio, on the Lake Erie shore

Documentation:

[Please note, this document does not save and post in an accessible way; to receive a copy of this document by email, contact Kevin Kamps at Beyond Nuclear: kevin@beyondnuclear.org; 240-462-3216. Apologies for the inconvenience, but NRC's document is not in a readily accessible format.].
Tuesday
May302017

TMI Alert Press Release - planned closure of Three Mile Island

for immediate release:                                                 Three Mile Island Alert                                  5/30/2017

Contact:  Scott D. Portzline 717-232-8863 and cell 717-421-7574
 
Three Mile Island Alert suspects that the announcement of Three Mile Island's planned closure is actually an attempted "shot across the bow" of PA's Nuclear Caucus.  It is designed to make the General Assembly pass legislation to rescue nuclear power.
Scott Portzline of TMI Alert said, "Exelon has used this same tactic in the last two years to pressure the states of Illinois and New York to artificially restructure the playing field. The result was tens-of-billions of dollars in bailouts for nuclear plants. This nation has already bailed out the nuclear power fleet on several occasions to the tune of a third of a trillion dollars. Nuclear power is not economically feasible and Wall Street knew that 20 years ago."
Portzline said, "Exelon took a very bad risk and should face the consequences. It was like betting that the mythical Washington Generals would beat the Harlem Globetrotters, it just wasn't going to happen. PA has a surplus of electricity and our taxpayers and ratepayers should not be forced to salvage a doomed decision."
Three Mile Island Alert believes that PA Legislators should pave the way for upstart wind and solar power equipment manufacturers. Pennsylvania could in effect create 20 times more jobs than are lost to nuclear plant closures. Nuclear power releases thousands of tons of chemicals into PA waterways and the mining and processing of nuclear fuel take a heavy toll on carbon releases to the atmosphere. Alternative power does not represent a terrorist target like nuclear reactors do.
Three Mile Island Unit #2 provided electricity for less than 90 days, yet a federal court ordered ratepayers to continue to pay for the destroyed power plant as if it were benefiting the area. TMI Alert believes that Pennsylvanians have already endured too many financial hardships from nuclear power.
 
-30-
Thursday
Apr132017

Millstone first US reactor to exam at-risk Creusot component but avoids conclusive testing

Dominion Energy’s Millstone Unit 2 in Waterford, CT became the first and still only of seventeen U.S. reactors with at-risk Creusot Forge components to voluntarily inspect its reactor pressurizer manufactured at France’s controversial Creusot Forge.  An Utrasonic Test (UT) enhanced visual examination found no signs of defects or cracking on the 11-year old replacement part.  The Creusot Forge, owned by AREVA, is under investigation for the manufacture and global marketing of reactor components weakened by excess carbon contamination and falsifying quality assurance documentation.  Beyond Nuclear has been pushing US operators and the U.S. Nuclear Regulatory Commission (NRC) through an emergency enforcement petition to do the enhanced visual inspections and more important material testing to determine the carbon content in the steel of the Creusot components.   Dominion is not planning to do any material testing that would provide a quantitative measure of the carbon content which can weaken the component and potentially fail during operation.

Media attention and public concern in part generated by the Beyond Nuclear petition prompted the State of Connecticut’s Department of Energy and Environmental Protection (DEEP) to request that Dominion hire an independent contractor to conduct an Ultrasonic Test (UT) to conduct an enhanced visual inspection for cracking and defects on the reactor component. The UT results, announced April 11, 2017, found no evidence of cracking or a defect in the stainless-steel component. However, Beyond Nuclear and it co-petitioners are arguing that the UT exam would not have provided any data on the controversial root cause, excess carbon contamination or “carbon macrosegregation,” that can only be detected by material testing samples of the components’ elemental chemistry.  The presence of excessive carbon in steel once under the harsh operational environment of a nuclear power plant leaves it vulnerable to rapid tearing and cracking of the large forged reactor vessels, reactor vessel replacement heads, steam generators and pressurizers resulting in a potentially catastrophic loss of coolant accident.

Newly surfaced documents authored in 2005 and 2006 by France’s nuclear safety agency (ASN) publicly released by a French news agency reveal that the French nuclear industry, EdF and AREVA, knew that the Creusot Forge had  serious manufacturing discrepancies coupled with loss of control of quality assurance and proceeded with the manufacturing and global marketing of suspected at-risk components anyways. The director of ASN was "blown away" by the negligence he witnessed during his personal inspection of the forge.  Millstone 2 received and installed its replacement reactor pressurizer from Creusot in 2006. 

A January 2017 ASN-led multinational inspection report as described by its head of nuclear equipment, Remy Catteau, found that the AREVA-Creusot Forge was “Ill-equipped” to manufacture nuclear-grade components for the industry. In a Reuter news service interview, Catteau explained that the Creusot Forge’s limited technology had resulted in manufacturing errors (carbon macrosegregation) and "One of the ways to resolve problems was to hide things, and that was the wrong way."