Watchdog Group Questions Safety Of Nuclear Plant
Rubatex Msds A panel of Nuclear Regulatory Commission officials admitted that they dont know whether a single broken steam tube in a Salem nuclear generator could lead to multiple breaks and ultimately a core meltdown.
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Rubatex Neoprene About 10 NRC officials gathered Thursday night at the Hampton Inn here from headquarters in Maryland, the region office in King of Prussia and the nuclear plants in Salem County to address concerns raised by Unplug Salem, a Linwood-based group.
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Rubatex Pipe The groups concerns center on corrosion and cracking of 1,300 alloy tubes contained in four generators inside the containment vessel of Salem Unit 2.
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Rubatex Pipe Insulation The generator tubes are nearly identical to one that burst 18 months ago at a plant in Indian Point, N.Y., leaking radioactive steam into the atmosphere.
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Rubatex 180 NRC officials said nuclear plants are designed to safely shut themselves down when such a leak occurs.
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Rubatex 180 Fs The plant is designed to accommodate the failure of a tube, said Glenn Meyer, NRC branch chief for the Salem plants.
Rubatex 1800 Thursdays meeting, however, focused on a new NRC committee report on steam generators that raises the question of whether a single rupture could cause a chain reaction of broken tubes.
Rubatex 320 In the event of gross failure of multiple generator tubes, more water could escape through steam vents than the plant is designed to replace, said Dave Lochbaum, a nuclear safety engineer with the Union of Concerned Scientists in Washington, D.C.
Rubatex 373 Without sufficient water, the nuclear reactor would melt down, Lochbaum said. Such a meltdown would pollute much of southern New Jersey with radiation.
Rubatex Rubber Meyer said such a scenario is only a hypothesis that NRC staff members are evaluating.
Rubatex Tape Thats not to say it absolutely cant happen, Meyer said. Multiple tube failures: Can they happen? We cant definitely say no. Thats what we are pursuing.
Rubatex Closing In the meantime, there is no safety risk with continued operation of the nuclear plant, said Rick Ennis, the NRC project manager in charge of responding to the steam-generator report.
Rubatex Closed Cell Gasketing NRC officials said a single tube failure is unlikely, because plant operator Public Service Electric and Gas plugs tubes when they are corroded 40 percent of the way through. The pencil-thin tubes are tested for cracks using radio waves.
Felpro Gaskets Although current testing methods dont typically discover a tube that is only 40 percent cracked, tubes in a high-pressure generator can withstand a crack 85 percent of the way through, said Joseph Muscara, an NRC senior metallurgical engineer.
Poly Products Supplies To date, 871 tubes have been plugged at Salem Unit 2.
Poly Hunting Feeders Meyer said PSE&G has a strong financial incentive to make sure they plug any tubes during refueling outages. If a tube breaks when the plant is operating, power production has to stop for weeks, he said.
Shoreline 13171 17 Neoprene Generators in Indian Point Unit 2 and Salem Unit 2 both use the same size and type of nickel-alloy tubing. But NRC officials have told Unplug Salem coordinator Norm Cohen that a direct comparison between the two generators is inappropriate, because the Salem tubes have been heat-treated.
Neoprene Pads On Thursday, Cohen asked the NRC panel to provide certification of the heat treatment. But the nuclear officials said only PSE&G has that information.
Neoprene Seat Covers Cohen and Lochbaum questioned whether it was worth the risk to keep the plant running while the NRC resolves the question of tube failures in older nuclear steam generators.
By Jack Kaskey
The Press of Atlantic City - 8/18/2001
Topic: Nuclear
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