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Information Notice No. 92-11: Soil and Water Contamination at Fuel Cycle Facilities
UNITED STATES NUCLEAR REGULATORY COMMISSION OFFICE OF NUCLEAR MATERIAL SAFETY AND SAFEGUARDS WASHINGTON, D.C. 20555 February 5, 1992 NRC INFORMATION NOTICE 92-11: SOIL AND WATER CONTAMINATION AT FUEL CYCLE FACILITIES Addressees All uranium fuel fabrication and conversion facilities. Purpose The U.S. Nuclear Regulatory Commission (NRC) is issuing this information notice to inform uranium fuel fabrication and conversion facilities of recent problems with solutions of uranium and other chemicals contaminating the soil and ground water. It is expected that recipients will review the information for applicability to their facilities and consider actions, as appropriate, to avoid similar problems. However, suggestions contained in this information notice are not new NRC requirements; therefore, no specific action or written response is required. Description of Circumstances In August 1990, uranium-contaminated soil and water were noted during excavation work near the solvent-extraction building at a fuel-conversion facility. Further investigation determined that the floor and sump of the solvent-extraction building were damaged, and solutions containing uranium and chemical contaminants had leaked through the damaged floor and sump. As a result of these findings, NRC issued an Order Modifying License, in which the licensee was required to: (1) repair and ensure the integrity of the floor and sump; (2) characterize and quantify the contaminants under the building; (3) identify potential migration pathways; (4) examine present and past monitoring-well data for evidence of contaminants; (5) determine whether contaminants had been released beyond the restricted area; and (6) develop a plan to identify and characterize other locations where past or present operations could have resulted in contaminating the environment. In November 1991, uranium and chemical contaminants were reported below the main process building at a fuel-fabrication facility. After a spill of approximately 200 gallons of nitric acid, the licensee noted damage to the floor and determined that uranium and other chemical contaminants were in the soil and surficial water aquifer. Presently, the licensee has removed soil from an area of about 8 feet by 30 feet by 5 feet deep. In addition, the licensee has installed a dewatering system at the interface between the permeable and impermeable soil layers. Because of the geological formation, the contaminants are not expected to have penetrated the impermeable soil 9201310062 . IN 92-11 February 5, 1992 Page 2 of 2 layer. Because of this problem, the licensee has placed a portion of its operations on standby. In December 1991, at another fuel-fabrication facility, 5300 gallons of liquid waste containing uranium and an ammonia compound leaked from an underground plastic pipe when a coupling ruptured. This occurred during the transfer of the waste from an onsite storage lagoon to the municipal sewer system. The incident was detected when water was observed percolating up from the soil in the vicinity of the discharge line. The licensee is taking soil and ground-water samples to characterize and quantify the contaminants. Discussion The events described in this information notice emphasize the need for uranium fuel-fabrication and conversion facilities to examine their floors, sumps, and underground pipes, to prevent solutions containing uranium and other chemical contaminants from leaking into and contaminating the soil and water. In addition, operating practices should be reviewed to ensure that the potential for leaks and spills is minimized. This information notice requires no specific action or written response. If you have any questions about the information in this notice, please contact one of the technical contacts listed below, or the appropriate NRC regional office. Richard E. Cunningham, Director Division of Industrial and Medical Nuclear Safety Office of Nuclear Material Safety and Safeguards Technical contacts: Edwin D. Flack, NMSS (301) 504-2405 George Bidinger, NMSS (301) 504-2683 Attachments: 1. List of Recently Issued NMSS Information Notices 2. List of Recently Issued NRC Information Notices .
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