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| Start date | Reporting criterion | Title | Event description | System | LER | |
|---|---|---|---|---|---|---|
| ENS 47739 | 13 March 2012 19:00:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification of a Sewage Leak | A Sewage Lift Station overflow occurred due to equipment failure. The overflow was discovered at 1400 CDT and terminated shortly thereafter. CPNPP Environmental notified TCEQ (Texas Commission on Enviornmental Quality) Region 4 (DFW) at 1441 CDT. This is reportable as a bypass of untreated wastewater as defined in the TPDES (Texas Pollution Discharge Elimination System) Permit. CPNPP Environmental personnel have completed disinfection of the affected area. The licensee estimated the leak to be between 100 and 200 gallons with a small portion reaching the lake. The equipment failure is suspected as being a failed level indicating system. The licensee will notify the NRC Resident Inspector. | ||
| ENS 47278 | 19 September 2011 13:00:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notification Due to Acid Leak Onsite | A report has been made to the Texas Commission on Environmental Quality concerning leakage of BULA 7016 (phosphoric acid) from a tank and berm at the Service Water Intake Structure. The berm is cracked, therefore the material is leaking into the soil surface. No chemicals have reached the reservoir. The NRC Resident Inspector has been notified. | Service water | |
| ENS 42204 | 13 December 2005 19:45:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release 10 CFR 50.72(b)(3)(xiii), Loss of Emergency Preparedness | Offsite Notification | The following event description is based on information currently available. If through subsequent reviews of this event, additional information is identified that is pertinent to this event or alters the information being provided at this time, a follow-up notification will be made via the ENS. At 1345 CST as part of post maintenance testing of the Comanche Peak Alert and Notification (siren) System, a polling of the system was initiated from the onsite microwave building. In response to this polling, only 5 of the system's 72 sirens initially responded. Troubleshooting determined that the 450 MHz radio system repeater used by both the siren system and the site emergency response teams was malfunctioning. Malfunction of this radio repeater made functionality of the systems intermittent and full function of neither was assured. The siren system and emergency response radio system have been returned to service by switching to the backup radio repeater at 1522 CST. There are no events in progress that required siren operation or dispatch of the site's emergency response teams. The NRC Resident Inspector has been notified of the siren and emergency response radio system failures. | ||
| ENS 40994 | 27 August 2004 13:50:00 | 10 CFR 50.72(b)(2)(xi), Notification to Government Agency or News Release | Offsite Notifications Made to Spillage of Phosphonic Acid | 15 gallon spill of blulab 7016 acid anti-scalant (used for Circulating Water System) of which 5 gallons was caught in a bucket and approximately 10 gallons spilled of which 1 or 2 gallons ended up into the lake. Licensee notified the National Response Center and the Texas Commission of Environmental Quality. The NRC Resident Inspector was notified of this event by the licensee. | Circulating Water System |