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| Entered date | Event description | |
|---|---|---|
| ENS 44444 | 28 August 2008 11:29:00 | An unplanned contamination event occurred on August 27, 2008. The event is reportable in accordance with 10CFR40.60 subparagraph (1) based on an unplanned event that resulted in additional radiological controls or by prohibiting entry into the area. The 24 hour period ended at 10:00 a.m. on August 28, 2008. The additional control imposed is to wear air purifying respirators on the second floor of the feed materials building. Air samples from the second floor analyzed and the airborne radioactivity average is approximately 6.7e-11 microCuries/ml. The airborne contamination is natural uranium ore concentrates and the physical form is a light dusty material. The area of contamination is in the Feed Material building while using the prepared feed mill. |
| ENS 44857 | 17 February 2009 13:52:00 | An unplanned contamination event occurred on February 16th, 2009. This is a reportable event in accordance with 10CFR40.60 paragraph (1) based on an unplanned event that results in additional radiological controls being required for more than 24 hours. The 24 hour period ended at 1030 on February 17th, 2009. The additional controls imposed was wearing a half-face respirator in the basement of the Feed Materials Building. The Feed Materials Building converts uranium ore concentrates into uranium hexafluoride. Air samples from the basement were analyzed and the airborne radioactivity average was approximately 8.27 e-11 �Ci/ml. The airborne radioactivity exceeded the MTW action level of 30% of a DAC (5.0 e-11 �Ci/ml). One DAC is 1.7e-10. Uranium Tetrafluoride (green salt) was the material that was airborne in the basement. An elevator that is used to transport green salt to different levels of the Feed Materials Building was leaking around an inspection cover which caused the airborne radioactive material. The licensee attributes the contamination to a failed gasket. The airborne contamination was discovered during routine air sampling which is performed daily. There is no plan to perform personnel testing for uptake or ingestion at this time. |
| ENS 44871 | 23 February 2009 18:13:00 | |
| ENS 44939 | 26 March 2009 21:16:00 | The licensee was troubleshooting a green salt filter leg when approximately 100 pounds of green salt was released from a secondary dust collector drop leg pipe. Four personnel were in the area wearing respiratory protection and anti-contamination clothing. The personnel left the area and access was restricted until 1030 on 3/26/2009. The green salt contaminated four floors of the building and the four personnel. Personnel contamination was removed with removal of the anti contamination clothing and subsequent showers. Most of the floor contamination was cleaned within four hours and the remainder was completed on 3/26/2009. No contamination was released outside the building. The licensee notified the NRC Resident Inspector. |
| ENS 46729 | 5 April 2011 18:34:00 | Employee was treated for HF exposure at 2100 (CDT on 4/4/11). The employee had contamination on his shoes and coveralls. Contamination levels were estimated to be approximately 10,000 dpm/100 cm squared. The employee was treated using calcium gluconate and returned to work. Isotope, quantities and chemical form: Weak hydrofluoric acid, uranium ore concentrates. The employee was treated onsite by site personnel. The employee was decontaminated before leaving the site. The licensee notified the Senior Fuel Facility Inspector. |
| ENS 46730 | 5 April 2011 18:34:00 | Employee was treated for KOH exposure at 1100 (CDT on 4/5/11). The employee had contamination on his plant issued shoes. Contamination levels were estimated to be approximately 16,800 dpm/100 cm squared. The employee was treated using ammonium sulfate and returned to work. Isotope, quantities and chemical form: Caustic (KOH), uranium ore concentrates. The employee was treated onsite by site personnel. The employee was decontaminated before leaving the site. The licensee notified the Senior Fuel Facility Inspector. |
| ENS 46764 | 17 April 2011 11:44:00 | The air monitoring vacuum pumps were disabled for approximately 30 minutes. The soft water supply to the air monitoring vacuum pump seals on the 2nd floor of the Feed Materials Building (FMB) was shut down for Annual Shut Down. These pumps provide vacuum for the stack monitoring and personnel area monitoring systems in the FMB. While the soft water system was shut down, a sanitary well water supply was being used for the vacuum pump seals. A back flow preventer in the sanitary water supply line malfunctioned and interrupted flow to the pump seals. This caused the vacuum pumps to be shut down until a temporary water supply could be established. A temporary water supply was reestablished to the pump seals. The pumps were restored to service at approximately 1500 (CDT). The back flow preventer has been replaced and the system is currently working properly. There were no indications that activities performed in the FMB caused a release during the time period that the stack and personnel monitoring system was out of service. The licensee notified R2 (Hartland). |
| ENS 46781 | 23 April 2011 22:08:00 | The air monitoring vacuum pumps were disabled for approximately 3 hours. A severe weather windstorm blew down an electrical power pole inside the plant property at 1700 CDT. Because of the electrical issue, it took approximately 3 hours to reestablish cooling water to the vacuum pumps. These pumps provide vacuum for the stack monitoring and personnel area monitoring systems in the Feed Materials Building. The pumps were restored to service at approximately 2000 CDT. There was no damage, no release, and no exposure from this event. The licensee notified the Fuel Facility Inspector (Hartland) in Region-2. |
| ENS 46799 | 28 April 2011 17:23:00 | (An) employee was treated for a chemical exposure at 0330 hours CDT on his ring finger. The employee had contamination on his shoes and coveralls. Contamination levels were 1500 dpm/100cm2 on his coveralls cuff and 200 dpm/100cm2 on the soles of his boots. There was no detectable contamination on the employee's skin. The employee was treated for the chemical exposure (weak hydrofluoric acid or caustic) and returned to work. Reporting IAW 10CFR40.60(b)(3). There was no release of contamination offsite involved in this incident. The licensee informed the NRC Senior Inspector RII (R. Gibson) of this incident. |
| ENS 47136 | 9 August 2011 15:41:00 | A person working at the sampling plant driving a forklift to move drums began having chest pains. The individual was taken to the site dispensary for evaluation. An ambulance was requested to take the employee to the hospital for further evaluation. The employee had contamination on his coveralls and boots. Before leaving for the hospital the employee's plant clothing was removed and surveyed. There was no detectable contamination on the employee when he was transferred to the hospital. The NRC Region II Senior Fuel Cycle Inspector (Gibson) has been informed. |
| ENS 47898 | 4 May 2012 10:02:00 | An employee complained of feeling dizzy. He was taken into the onsite medical dispensary for observation. The employee had been working at the Uranium Ore Concentrates Sampling area when he began to feel ill. There was approximately 18,000 dpm/100cm2 contamination on the bottom of the employee's plant issued shoes. After the employee recovered sufficiently, he was released (to) the care of his personal physician. The employee was free of contamination before being transported to the offsite medical facility. The licensee notified the Region II Senior Fuel Facility Inspector. |
| ENS 47906 | 8 May 2012 08:49:00 | An employee received a laceration on the bridge of his nose when removing a respirator. He went into the onsite medical dispensary where the nurse cleaned the wound and applied a bandage. The employee had been working in the Feed Materials Building. He was donning PPE (Protective Personal Equipment) in the cooling shack on the 6th floor. There was approximately 33,000 dpm/100cm? contamination on the bottom of the employee's plant issued shoes. The employee returned to work following the treatment. The licensee notified the Senior NRC Inspector. |
| ENS 47916 | 11 May 2012 09:21:00 | On 05/10/12, approximately at 1020 CDT, a person working in the Feed Materials Building injured his foot while drumming off green salt. The employee received first aid treatment in the on-site dispensary. The individual was found to have contamination on his plant coveralls and boots. The employee was decontaminated and transported to an off-site medical facility. The employee was appropriately exit monitored and there was no detectable contamination on the employee when he left the site. Contamination on the employees right boot was 26,664 dpm/100cm2. The chemical was Uranium Ore Concentrate. The licensee has notified NRC Region 2 (Richard Gibson). |
| ENS 47978 | 31 May 2012 09:58:00 | On 05/30/12, approximately at 1120 CDT, five employees working in the Feed Materials Building received first aid precautionary treatment for chemical inhalation in the on-site dispensary. The employees were found to have contamination on their boots and plant coveralls. The highest reading found on the employees was 53,300 dpm/100cm2 on the employee's boots. The employees were not transported to an off-site facility. The employees were released to go back to work and appropriately exit monitored at the end of their shift. There was no detectable contamination on the employees when they left the site. The licensee has notified NRC Region 2 (Calle). The chemical was Uranium Ore Concentrates. |