Davisbesse nuclear reactor buildings cracked concrete being. Davisbesse nuclear power plant inspects concrete shield building. Nrc acrs to discuss davisbesse shield building cracking, nov. The inspection activities conducted subsequent to your identification of laminar cracks in the shield building cylindrical wall included activities related to the shield building design and licensing bases and shield building operability capability to perform its specified safety functions.
How did the nrc decide the shield building at davisbesse is. Aug 23, 2012 the company has faced criticism after engineers last year found small cracks in the shield building that surrounds the reactor. Oct 17, 2011 new york, oct 17 reuters firstenergy said it discovered small cracks in the concrete shield building surrounding the containment structure at the davis besse nuclear power plant in ohio, which. When did fenoc discover cracks in the reactor shield building at the davis besse nuclear power plant. The 894mw davisbesse nuclear power station produces approximately 40% of the total power consumed by the northwestern region of ohio state. Davisbesse nuclear power plants nuclear street nuclear. It has a single pressurized water reactor, also referred to as a light water reactor. Davisbesse nuclear power station is a nuclear power plant in oak harbor, ohio, the united states. The nrc was informed by firstenergy on october 10 that it had identified what looked like a crack in the concrete shield building of the. In 2011, evidence showed that the concrete shield building around the reactor was cracking. Davisbesse shield building crack bryce lehman alice erickson i agenda oi initial condition c condition assessment o licensees position o nrcs position o impact on license renewal 1wy q1 1. Inspections have identified three previously undetected cracks in the concrete shield building of the davisbesse nuclear power plant in ohio, as well as some growth in cracks discovered in 2011. The cracks were immediately announced to the necessary regulators, but they were not made public at the time.
Citeseerx document details isaac councill, lee giles, pradeep teregowda. Can the shield building still protect the reactor vessel from being hit by heavy outside objects. A coalition of environmental groups has been challenging fenocs bid for a license renewal for davisbesse since 2010. Crack discovered in davisbesse containment building youtube. If there are any challenges identified with the design function of the shield building the nrc will expect the utility to resolve them before restarting.
Crack discovered in davisbesse containment building. Highdefinition cameras inserted into sample holes in the davisbesse nuclear plants shield building have revealed a handful of additional cracks, firstenergy reported friday, but confirmed that. Moisture from blizzard of 78 caused cracks in davisbesse. Sep 20, 20 subsequently, the shield building was painted with a protective coating, and a longterm inspection program was established to ensure continued safe function of the building. Davis besse s shield building has since been equipped with a weatherproof coating. The company has faced criticism after engineers last year found small cracks in the shield building that surrounds the reactor. As of 2011, it is operated by the firstenergy nuclear operating company subsidiary of firstenergy corp. Nuclear regulatory commission with questions regarding the cracking in the davisbesse shield building walls. Oct 14, 2011 workers used hydrodemolition to cut a 33 foot by 22 foot hole in the shield building to make way for the new reactor head. Akronbased firstenergy says the reactor at the davisbesse nuclear plant still has an adequate safety. In a report submitted to the nuclear regulatory commission tuesday, firstenergy nuclear operating co. Davis besse site vice president ray lieb said the inspection results thus far confirms the 2011 conclusion that the shield building s structural integrity is not impacted by the presence of these tight cracks. Nrcs report on the davisbesse shield building safety.
Oct 24, 2011 if there are any challenges identified with the design function of the shield building the nrc will expect the utility to resolve them before restarting. Davisbesse nuclear power station, ohio power technology. Davisbesse nuclear power plant inspects concrete shield. Davisbesse officials said they would continue to look for the cause behind the cracks in the shield building and developing a longterm building monitoring plan. Dec 12, 2011 do the cracks discovered in the shield building at the davis besse nuclear station compromise its ability to stand up to tornadoes and earthquakes. As of 2011, it is operated by the firstenergy nuclear operating company subsidiary of firstenergy corp on march 5, 2002, maintenance workers discovered that corrosion had eaten a footballsized hole into the. Professor darwin could not support an analytical determination of rebar splice strength in presence of a laminar crack. Davisbesse nuclear plant ok to restart power engineering. An october 2011 shutdown of the plant for maintenance revealed a 30 foot long hairline. Uncoated since 1970, the davisbesse nuclear power station shield building recently received a protective coating after cracks in the structure were found.
Prnewswire firstenergy nuclear operating company fenoc representatives last night at a public meeting informed the nuclear regulatory commission that it. Sep 07, 2014 the sandusky register reports that cracks first discovered in the shield building at davis besse in 2011 have grown since then. Cracks in shield building grow, but safety isnt at issue. Comparisons have been made between the cracks found at davis besse and cracks in the containment structure at the crystal river nuclear plant in florida. The nuclear regulatory commission announced this week it is suspending final decisions on nuclear plant. New york, oct 17 reuters firstenergy has discovered small cracks in a concrete shield building at the davisbesse nuclear power plant in ohio, which was shut for a reactor vessel head. Oct 17, 2011 new york, oct 17 reuters firstenergy has discovered small cracks in a concrete shield building at the davis besse nuclear power plant in ohio, which was shut for a reactor vessel head. Davisbesse site vice president ray lieb said the inspection results thus far confirms the 2011 conclusion that the shield buildings structural integrity is not impacted by the presence of these tight cracks.
The cracks were immediately announced to the necessary regulators, but they were not made public at. Davisbesse nuclear power station is a 894 megawatt, nuclear power plant, located northeast of oak harbor, ohio in ottawa county, ohio. Toledo, oh wtol after admitting to discovering cracks in the concrete shell of the davisbesse nuclear reactor last month, the plants operator says there more cracks near the top of the structure. Update 1firstenergy finds cracks at ohio nuclear reactor. The shield building of firstenergy nuclear operating co. License hearing on davisbesse planned may 18 the blade. Following the initial discovery of the cracks, fenoc concluded that they had been caused by a severe blizzard in january 1978. Citeseerx davisbesse nuclear power station reactor vessel head. Shield building crack investigation and root cause presentation 2 public meeting august 9, 2012 agenda introduction barry allen, site vice president davis besse shield building condition evaluation ken byrd, director site engineering shield building root cause investigation jon hook, design engineering manager shield building corrective actions. Sep 15, 2017 oak harbor, ohio ap workers will spend several weeks repairing cracks in an ohio nuclear plants concrete walls that protect its reactor. Nuclear regulatory commission nrc publicly announced its decision to allow the davis besse atomic reactor to restart, despite lingering questions about its cracked shield building.
Port clinton the federal atomic safety and licensing board will hear oral arguments in two weeks regarding whether shieldbuilding cracks at the davisbesse nuclear power plant warrant. Replacement reactor vessel closure head rvch inspection and additional inspections of your activities to demonstrate operability of the containment system following your identification of subsurface concrete laminar cracks in the shield building cylindrical wall. Davisbesse nuclear reactor buildings cracked concrete being replaced photos cleveland, ohio firstenergy corp. Davisbesse nuclear power station discusses recent reactor. Sep 03, 2014 coalition challenges davis besse amps re. Davisbesse nuclear power station examines shield building. On october 10, while conducting work to replace the davis besse reactor vessel head, plant workers identified cracks in the shield building. Nuclear regulatory commissions nrc advisory committee on reactor safeguards acrs will discuss firstenergy nuclear. Presentation slides on davisbesse shield building crack. More cracks discovered in davisbesse nuclear reactor shield. How did the nrc decide the shield building at davisbesse. The company submitted the root cause analysis of shield building cracks, which includes the companys proposed corrective actions and longterm monitoring program of the shield building, on feb.
May 04, 2012 port clinton the federal atomic safety and licensing board will hear oral arguments in two weeks regarding whether shield building cracks at the davis besse nuclear power plant warrant. The concrete building protects the plant and its 900 mw pwr reactor from weather and aircraft and is designed to contain any radioactive leaks. To replace aging, deteriorating, damaged parts, an unprecedented four large cuts have been made through the davisbesse concrete shield building which prevents release of radiation. Shield building cracking and voids davisbesse constructions site floods in 1972. In response to inquiries by my staff, the nrc provided a detailed description of the cracking at firstenergys davisbesse plant. Inspections have identified three previously undetected cracks in the concrete shield building of the davisbesse nuclear power plant in ohio. Ctlgroup was onsite when cracks were first identified and assisted the client by identifying nondestructive techniques that would be useful in identifying the presence of cracks within the structure. Plus, the plant exited a combined steam generator replacement and fuel outage in may the sandusky register reports that cracks first discovered in the shield building at davisbesse in 2011 have grown since then. Shield building crack investigation and root cause.
The shield building was the only abovegrade structure at davisbesse that was not sprayed with a white cement thoroseal finish to seal the exterior concrete surface before the facility went online in 1970. Besse atomic reactors concrete containment shield building cracking. Cracks were found in the concrete walls that protect the davisbesse nuclear plants reactor. On november 4th, david lochbaum, director of the nuclear safety project at the union of concerned scientists, wrote the u. Nuclear street nuclear power plant news, jobs, and careers. Cracks are confined to flute shoulder regions with exception of top 20 of shield building wall and two small regions near msl penetrations cracking exists at top 20 of shield building wall outside shoulder region investigation ongoing o cracks are very tight, oct 10, 2012 on october 1, 2011, the davis besse nuclear power plant shut down so a new reactor vessel head could be installed. Routine inspections of the concrete shield building at firstenergy nuclear operating co. Analysis of all inspection results to date confirms the 2011 conclusion that the shield buildings structural integrity is not impacted by the presence of these tight cracks, said davisbesse. It is located on the southeast shore of lake erie, about 16km north of oak harbor, ohio. Highdefinition cameras inserted into sample holes in the davis besse nuclear plants shield building have revealed a handful of additional cracks, firstenergy reported friday, but confirmed that. In 2011, evidence showed that the concrete shield building.
Cracks are confined to flute shoulder regions with exception of top 20 of shield building wall and two small regions near msl penetrations cracking exists at top 20 of shield building wall outside shoulder region investigation ongoing. Cracks discovered in a shield building protecting davisbesses nuclear reactor will be repaired this fall. The company today said inspections using a new, highdefinition camera inserted into holes drilled into the 2. Davisbesses cracked containment snow job2 legislative. The robust building continues to function safely and reliably. Throughout its operation, davisbesse has been the site of several safety incidents that affected the plants operation. Prnewswire routine inspections of the concrete shield building at firstenergy nuclear operating companys fenoc davisbesse nuclear power station. These are not considered to effect the plants safety. More cracks in concrete at ohio nuclear plant prompt repairs. Do the cracks discovered in the shield building at the davisbesse nuclear station compromise its ability to stand up to tornadoes and earthquakes. The case against the davisbesse nuclear power plant. On october 10, while conducting work to replace the davisbesse reactor vessel head, plant workers identified cracks in the shield building. Firstenergy finds cracks at ohio nuclear reactor reuters. The davisbesse nuclear power station is located in oak harbor, ohio, approximately 21 miles southeast of toledo.
The nrc recently issued a report that documents how we reached the conclusion the cracks discovered in the davisbesse shield building do. Davisbesse shield building laminar cracking licensee had extended discussions today with professor darwin. The davis besse nuclear power station is located in oak harbor, ohio, approximately 21 miles southeast of toledo. Davis besse officials said they would continue to look for the cause behind the cracks in the shield building and developing a longterm building monitoring plan. Analysis of all inspection results to date confirms the 2011 conclusion that the shield building s structural integrity is not impacted by the presence of these tight cracks, said davis besse. Davisbesse cracks to be repaired sandusky register carroll. Workers used hydrodemolition to cut a 33 foot by 22 foot hole in the shield building to make way for the new reactor head. The nrc allowed a restart without knowing the cause of the cracking. Dennis kucinich d has made an aggressive push to shut down firstenergys davisbesse nuclear plant following the discovery of cracks in the plants shield building. Firstenergy maintained that the cracks were architectural, not structural. Toledo, oh wtol after admitting to discovering cracks in the concrete shell of the davis besse nuclear reactor last month, the plants operator says there more cracks near the top of the structure.
Davisbesses cracked shield building is safe the nrc has. The concrete building protects the plant and its 900 mw pwr. Workers replacing the nuclear reactor head at the davis besse plant discovered a crack in a concrete containment building monday. On october 1, 2011, the davisbesse nuclear power plant shut down so a new reactor vessel head could be installed. Davisbesses cracked concrete shield building gets repairs. Akronbased firstenergy says the reactor at the davis besse nuclear plant still has an adequate safety. Oak harbor, ohio ap workers will spend several weeks repairing cracks in an ohio nuclear plants concrete walls that protect its reactor. Davisbesse cracks to be repaired sandusky register. The 894mw davis besse nuclear power station produces approximately 40% of the total power consumed by the northwestern region of ohio state.
The nrc concluded on december 3 that the shield building can fulfill these safety functions. Akron firstenergy has found more cracks in the reinforced concrete building housing the davisbesse reactor. Fenocs determination that davisbesse shield cracks. New york, oct 17 reuters firstenergy said it discovered small cracks in the concrete shield building surrounding the containment structure at the davisbesse nuclear power plant in. More cracks in concrete at ohio nuclear plant prompt. An nrc inspector examines severe cracking in the davisbesse shield building shortly after they were first revealed on oct. Engineers then discovered the crack along one edge of the hole. Ctlgroup has assisted firstenergy in evaluation and monitoring of laminar cracks present in the shield building at davis besse nuclear power station. Comparisons have been made between the cracks found at davisbesse and cracks in the containment structure. That description revealed that the cracks in the davisbesse shield building are more numerous and more widely distributed than firstenergy has. Among the contentions were that renewables and efficiency could replace davisbesses power and. Workers replacing the nuclear reactor head at the davisbesse plant discovered a crack in a concrete containment building monday. Subsequently, the shield building was painted with a protective coating, and a longterm inspection program was established to ensure continued safe function of. Further cracking found at davisbesse world nuclear news.
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