原文：
BRACEVILLE ? Concern over an incident involving a valve malfunction last summer at Braidwood Generating Station has been downgraded by the Nuclear Regulatory Commission. The station does not face a federal fine stemming from the event. The valve has since been repaired. The incident involves the June 24 failure of a valve outside the containment area, which controls the sump pump to drain water from the reactor, should it become necessary. In November, the NRC issued a preliminary yellow finding to the station, indicating the incident with the valve was of substantial importance to safety. On Friday, basing the change on information turned over to the agency in January of this year, the NRC lowered its finding from yellow to white. “The white finding means the station gets additional inspections, but is also considered to be low to moderate safety significance,” Braidwood spokesman Neal Miller noted Monday. “The NRC gave us credit for being able to manually operate the valve in certain situations.” The NRC report at the time indicated corrosion on a switch caused the valve to not fully open. This was not an immediate safety concern, however, because complete loss of the safety function of the emergency core cooling system was not involved. In a follow-up inspection, the NRC found the incident was more than minor because of its impact on other equipment. The NRC said the station staff was aware for several years of water leakage from the overhead areas around the valves. The potential safety significance of the water leakage was not adequately evaluated, and the problem was not corrected. The roof hatch leaked water into the area during moderate to heavy rainfall, and was identified through a corrective actions program, the NRC noted. However, no one made the connection from the leak in the compartment to the water going into the conduit and valve mechanism, the agency said. Miller said Monday Exelon Nuclear checked all the others valves at Braidwood Station and its other nuclear plants in Illinois to make sure they do not have the same type of issue. “None did,” he said. Miller said it was found the faulty valve did not fully open due to corrosion on the switch. “It was from water entering the switchbox, where it should not have entered,” he said. “We repaired the switchbox and determined where the water was coming from. It was from a hatch in the roof, and we’ve repaired that.” NRC Region 3 spokesman Viktoria Mitlyng of Lisle noted in a press release Friday the agency determined the utility failed to design the valve to protect its ability to function, a violation of federal requirements. “The NRC’s final determination is different because the agency didn’t have complete information related to the valve issue at the time, and made a conservative assessment,” Mitlyng was quoted as saying in the release. “Exelon presented new information to the NRC to show this issue did not result in a significant reduction to plant safety. This ... demonstrated to the NRC the safety significance of the violation was not as high as originally assumed.”
原文来自：http://www.morrisdailyherald.com/articles/2010/03/01/73139330/index.xml

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译文：阀门大量重视安全核管理
去年11月，核管理委员会发布了初步黄色找到车站，说明事件的阀门大量重视安全的。上周五，基于对信息的变化上缴今年1月该机构的核管理委员会下调了由黄白色的发现。 “白色发现意味着获得更多的检查站，但也被认为是低到中等安全的重要性，”布雷德伍德发言人尼尔苗学礼说星期一。 “核管理委员会给了我们都能够以手动操作在某些情况下阀门的功劳。” 当时的NRC的报告指出，在一个开关阀腐蚀造成的不xx开放。这不是一个即时安全问题，但是，由于紧急冷却系统的核心安全功能xx丧失并没有参与。 在后续检查，核管理委员会发现，发生事故是多，因为它对其他设备的影响轻微。 核管理委员会表示，该站工作人员对漏水知道几年各地的阀门领域的开销。水的渗漏安全隐患的意义还没有充分评估，问题并没有得到纠正。 屋顶孵化泄入水，在该地区中到大雨，并通过纠正行动计划确定的是，NRC说。 但是，没有人提出的从到水进入的渠道和机制，将车厢阀门泄漏方面，该机构说。 米勒说，星期一艾斯核检查所有在布雷德伍德站和其他在伊利诺伊州核电厂其他阀门，以确保他们没有相同类型的问题。 “没有了，”他说。 米勒说，被发现有问题的阀没有xx打开开关，由于腐蚀。 “这水是进入开关盒，在那里不应该进入，”他说。 “我们修复了开关盒和判断时把水的来源。这是一个孵化的屋顶，而且我们已经修复了。“ 核管理委员会发言人3区的维多利亚Mitlyng莱尔在一份新闻稿中指出，周五该机构决定不实用的阀门设计，以保护其功能，是xx政府的规定的行为。 “核管理委员会的最终决定是不同的，因为该机构没有在当时完成有关的资料阀的问题，并提出了保守的估计，”Mitlyng在被释放话说。 “艾斯提出了新的资料，核管理委员会以显示这个问题并没有明显减少的结果工厂的安全。这...向NRC表明对违反安全的重要性并不像原先估计的高。“

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