Event Notification Report for June 28, 2005

OFFSITE NOTIFICATION DUE TO MINOR FISH KILL

"At 1300 CDST on 06/28/05, it was discovered that a minor fish kill took place in LaSalle County Nuclear Station's cooling lake, due to increased temperature. As summer air temperatures increased, the cooling lake temperature increased above 95°F, the threshold at which species susceptible to increased temperature begin to perish. It was communicated to the Illinois Department of Natural Resources, that approximately 300 fish, the majority of which were striped bass, had perished.

"This notification is made in accordance with Exelon Reportability manual SAF 1.9, ENV 3.26, LaSalle County Station Facility Operating License Appendix B Section 4.1 'Unusual or Important Environmental Events,' and 10CFR50.72(b)(2)(xi)."

The licensee notified the NRC Resident Inspector.

AGREEMENT STATE REPORT LOST / MISSING SOURCE

The State provided the following information via facsimile:

"The North Carolina Radioactive Materials branch was made aware of the loss [of] a Po-210 static elimination source from the Energizer facility in Asheboro, NC today.

"The agency interviewed the Staff Environmental Coordinator this afternoon via telephone. The information for the missing source is as follows:
Isotope: Po-210
Activity: 20 millicuries as of 3 March 2004 (decay corrected to 2.38 mCi at time of loss)
Make: NRD LLC
Model: P-2031-1000
Serial No.: A2DP844

"The licensee continues to search for the missing source. North Carolina Radioactive Materials Branch continues to monitor the situation and will dispatch health physicists to investigate as necessary."

OFFSITE NOTIFICATION TO ILLINOIS DEPARTMENT OF NATURAL RESOURCES

"A 1300 CDST on 06/28/05, it was discovered that a minor fish kill took place in Braidwood Nuclear Station's cooling lake, due to increased temperature. As Summer air temperatures increased, the cooling lake temperature increased above 95°F, the threshold at which species susceptible to increased temperature begin to perish. It was communicated to the Illinois Department of Natural Resources, that approximately 1000 fish, the majority of which were Gizzard Shad, had perished.

"This notification is made in accordance with Exelon Reportability manual SAF 1.9, ENV 3.26, Braidwood Station Facility Operating License Appendix B Section 4.1 'Unusual or Important Environmental Events,' and 10CFR50.72(b)(2)(xi)."


The licensee notified the NRC Resident Inspector.

TECHNICAL SUPPORT CENTER VENTILATION INOPERABLE

"This 8 Hour Non-Emergency report is pursuant to 10CFR50.72(b)(3)(xiii). Main Control Room personnel were notified that normal and emergency Technical Support Center (TSC) ventilation was inoperable. The loss of ventilation in the TSC constitutes a Major Loss of Emergency Preparedness Capability because it significantly impaired the fulfillment of the Peach Bottom emergency plan in the event of a potential radiological release. Peach Bottom maintenance personnel immediately began investigating the inability to place TSC ventilation in service and were able to restore both normal and emergency ventilation. The initial failure of both normal and emergency TSC ventilation is still being investigated. Normal plant operation is unaffected by the loss of TSC ventilation."

The licensee has notified the NRC Resident Inspector.

CALIFORNIA AGREEMENT STATE REPORT - LOST AND RECOVERED IR-192 IMPLANTATION SEEDS

The State provided the following information via email:

"On Tuesday, June 28, 2005, I received a call from Waste Management of Orange that the radiation alarm had sounded. They separated the radioactive waste from the other waste and placed the radioactive waste in their secure holding area until I could arrive. Around 11:30 a.m. I went out to the facility and took surveys and tried to identify the radionuclide - my batteries on the MCA were running low, but based on the peaks I thought it could be either Ga-67 or Ir-192. The load had been picked up from Chapman Hospital so I contacted them and brought the waste back to the hospital where the RSO was going to do a positive identification. This morning I stopped at the hospital and took some readings outside the waste storage area and did another identification scan using the Bicron Field spec. I contacted the Imaging Director [name deleted]. He said they did find an Ir-192 ribbon (which contained 6 seeds). They put this ribbon with the 19 other ribbons that were being returned to the manufacturer. A 48 year old female patient received 20 ribbons (each with 6 seeds) on 6-20-05. The total activity was 58.19 mCi (activity per ribbon with 6 seeds = 2.9 mCi). The Oncology Physician [name deleted], feels the ribbon could have been dislodged before she was discharged on 6-24-05. This ribbon could have been in the bedding under the patient for some period of time. He will do an evaluation to determine the effects of the ribbon being under the patient for a given time and the effects of a lower dose being administered. [The Imaging Director] states that the found ribbon was placed in with the other 19 ribbons that will be going back to the manufacturer. He has counted and accounted for the 20 ribbons that were originally sent and confirms all 20 are now accounted for. The facility will send me a report about this incident and will outline their corrective actions to avoid disposal of such ribbons in the future."

California Report No. 062805

STOLEN TROXLER DENSITY GAUGE

A Troxler Moisture Density Gauge Model 3440, S/N 18795 was stolen from a locked closet in the licensee's trailer field office located in East Chicago, IN, between 1800 [CDT] on 6/28/05 and 0600 on 6/29/05. The Model 3440 contains two (2) radioactive sources; 8 millicuries Cs-137 (S/N 508385) and 40 millicures Am-241/Be (S/N 4714253). The licensee contacted the local police and they are investigating the incident. The licensee is not planning to issue a press release.