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The Impact of the April 27, 2011 Severe Weather Outbreak on TVA’s Radiological Emergency Preparedness Program

机译:2011年4月27日的严重天气暴发对TVA的放射应急准备计划的影响

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On April 27, 2011, the Southeast United States endured an historic outbreak of severe weatherthat produced a record-breaking number of tornadoes, among numerous other high wind andhail reports. This outbreak surpassed the 1974 outbreak in many statistics and was thedeadliest tornado outbreak in our region since 1932. Over 100 tornados were reported in theTVA service territory, several of which were long-track, high intensity.As several rounds of severe weather traversed the TVA region that day, tornado warnings wereissued multiple times for each of TVA’s three operating nuclear plants and the corporateemergency centers. One such warning was for a violent, EF-5 tornado that passed within 5miles of the Browns Ferry Nuclear (BFN) Plant in North Alabama, causing a 3-unit SCRAM andsubsequent Notice of Unusual Event (NOUE) to the Nuclear Regulatory Commission (NRC).The Central Emergency Control Center (CECC) was activated in support of the BFN event, andmeteorological support was provided both from the main CECC in Chattanooga, TN and asatellite location in Muscle Shoals, AL.This paper and presentation will provide an overview of the event, the support that the CECCMeteorologists provided during and after the event, and lessons learned.
机译:2011年4月27日,美国东南部经历了历史性的恶劣天气暴发 产生了创纪录的龙卷风,以及其他许多强风和 冰雹报告。在许多统计数据中,该暴发均超过了1974年的暴发, 自1932年以来,该地区是最致命的龙卷风爆发。 TVA服务领域,其中一些是长期的,高强度的。 当天,TVA地区经历了几轮恶劣天气,龙卷风警告 分别为TVA的三个运行中的核电厂和公司发出了多次 急救中心。这样的警告之一是暴力EF-5龙卷风在5内通过 阿拉巴马州北部的布朗斯渡轮核工厂(BFN)数英里,造成了3个单元的SCRAM和 随后向核监管委员会(NRC)发出异常事件通知(NOUE)。 中央紧急控制中心(CECC)已启动,以支持BFN事件,并且 田纳西州查塔努加(Chattanooga)的主要CECC和 位于阿拉斯加州Muscle Shoals的卫星位置。 本文和演示文稿将提供事件概述,CECC的支持 活动期间和活动结束后提供了气象学家的经验教训。

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