南卡罗来纳州萨凡纳河国家实验室火灾触发场区紧急状态 当晚解除、放射性检测无可检出污染
位于美国南卡罗来纳州艾肯县 Aiken 附近的能源部萨凡纳河场址（Savannah River Site）10月28日傍晚发生火灾：场址内的萨凡纳河国家实验室（Savannah River National Laboratory）起火，场址官员于当天下午5时39分宣布场区紧急状态（Site Area Emergency），当晚9时45分紧急状态终止，各项防护措施解除，场址出入路障重新开放，员工10月29日照常到班。
据萨凡纳河场址应急组织当晚发布的第2、3号新闻稿，火灾已被扑灭；放射性检测显示无可检出水平的污染，第2号新闻稿称受影响设施之外未报告污染。紧急状态期间，场址各入口路障关闭、暂停外来交通，场址周边铁路、河流与空中交通一度受限，受影响区域内不参与应急处置的员工按要求就地避护。125号公路全程保持开放。场址官员表示已通知相应的州与地方政府机构，后续信息将通过场址官网公布。
美联社报道称，火灾发生后交通与空域限制一度实施，员工避护约30分钟。有关方面尚未公布起火原因与涉事物质的细节。
萨凡纳河场址占地约310平方英里，建于20世纪50年代初冷战时期，曾为核武器生产氚与钚-239等材料，现主要承担环境治理、核废料管理与核材料处置任务。萨凡纳河国家实验室是能源部17个国家实验室之一，也是唯一由能源部环境管理办公室主办的国家实验室，研究领域包括环境保护、清洁能源与核材料安全。
Fire at Savannah River National Laboratory in South Carolina Triggers Site Area Emergency, Lifted Same Night with No Detectable Contamination
A fire broke out on the evening of October 28 at the U.S. Department of Energy's Savannah River Site near Aiken, in Aiken County, South Carolina. The fire, at the Savannah River National Laboratory on the site, prompted officials to declare a Site Area Emergency at 5:39 p.m. that day. The emergency was terminated at 9:45 p.m. the same night, protective actions were lifted, site barricades reopened, and employees were told to report to work as scheduled on Thursday, October 29.
According to News Releases No. 2 and No. 3 issued that night by the Savannah River Site Emergency Response Organization, the fire has been extinguished, radiological surveys indicated no detectable levels of contamination, and no contamination was reported outside the affected facility. During the emergency, barricades at site entrances were closed to incoming traffic, and rail, river and air traffic in the vicinity was restricted, while employees in affected areas who were not involved in the response sheltered in place as a precaution. Highway 125 remained open. Site officials said the appropriate state and local government agencies had been notified and that further information would be provided through the site's website.
The Associated Press reported that traffic and airspace restrictions were put in place after the fire and that employees sheltered for about 30 minutes. Officials have not yet released the cause of the fire or details of any material involved.
The Savannah River Site covers about 310 square miles and was built in the early 1950s during the Cold War, when it produced materials for nuclear weapons, primarily tritium and plutonium-239. Its work today focuses on environmental stewardship and cleanup, nuclear waste management and the disposition of nuclear materials. The Savannah River National Laboratory is one of the Department of Energy's 17 national laboratories and the only one sponsored by the department's Office of Environmental Management.
来源：GSM·美国（原文链接）
图片来源：图：能源部萨凡纳河场址（Savannah River Site）设施航拍资料图。美国能源部，公共领域，经 Wikimedia Commons。 / Aerial file photo of the U.S. Department of Energy Savannah River Site. U.S. Department of Energy, public domain, via Wikimedia Commons.
