| U.S. Nuclear Regulatory Commission
Operations Center Event Reports For
07/12/2013 - 07/15/2013 ** EVENT NUMBERS ** |
 | !!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!! | | Fuel Cycle Facility | Event Number: 49165 | Facility: PADUCAH GASEOUS DIFFUSION PLANT
RX Type: URANIUM ENRICHMENT FACILITY
Comments: 2 DEMOCRACY CENTER
6903 ROCKLEDGE DRIVE
BETHESDA, MD 20817 (301)564-3200
Region: 2
City: PADUCAH State: KY
County: McCRACKEN
License #: GDP-1
Agreement: Y
Docket: 0707001
NRC Notified By: KEVIN BEASLEY
HQ OPS Officer: HOWIE CROUCH | Notification Date: 07/01/2013
Notification Time: 17:53 [ET]
Event Date: 06/28/2013
Event Time: 14:09 [CDT]
Last Update Date: 07/14/2013 | Emergency Class: NON EMERGENCY
10 CFR Section:
76.120(c)(1) - UNPLANNED CONTAMINATION
| Person (Organization):
MARK FRANKE (R2DO)
BRIAN SMITH (NMSS)
| Event Text UNPLANNED CONTAMINATION EVENT THAT RESTRICTED ACCESS FOR GREATER THAN 24 HOURS
"At 1409 hours [CDT] on 6/28/2013, the Plant Shift Superintendent was notified of an unplanned contamination event that occurred in the C-710 Laboratory building. The controller program for the sample cylinder wash system in room #21 failed, causing supply water to flow out of the system. The water leaked through the floor into room B-23, which is located in the basement, and spread contamination onto the floor and a table. The area of the known water leak was immediately posted as a contamination area. Chemical Operations decontaminated the area that was initially contaminated by the water leak at 1730 hours on 6/28/2013. During follow-up investigative surveys conducted by Health Physics, additional contamination was discovered in other areas of the room causing the entire room to be posted as a contamination area (CA). It was initially thought that the additional contamination which was found was legacy contamination unrelated to the water leak; however, based on further investigation and HP survey results [on 7/1/13], it appears that contamination found elsewhere in the room also came from the water leak event. All contamination related to this event was not cleaned up within 24 hours and the room remains restricted at this time.
"This event is reportable as a 24 hour event in accordance with 10 CFR 76.120(c)(1)(i), 'An unplanned contamination event that: Requires access to the contaminated area, by workers or the public, to be restricted for more than 24 hours by imposing additional radiological controls or by prohibiting entry into the area'.
"The NRC Resident Inspector has been notified of this event."
Room B-23 remained locked over the weekend and was not accessed by plant personnel so the possibility of spreading contamination was minimized.
PGDP Problem Report No. ATRC-13-1468: PGDP Event Report No. PAD-2013-05.
* * * RETRACTION AT 1522 EDT ON 7/14/13 FROM DEREK WARFORD TO BILL HUFFMAN * * *
"Calculations were performed by the Health Physics group of the estimated quantity of material in the release. The estimate was based on: (1) An isotopic analysis of the contamination revealed three predominant isotopes, all Uranium daughters, Pa-234, Thorium-231, and Thorium-234; (2) the estimated water volume 'released' of 8.0 liters; and (3) that the isotopic concentration in the 8.0 liters of water was homogeneous. Based on the calculations, the summation of the mixture of isotopes was 4.52E2 microcuries and is approximately 30 percent of 5 ALI [annual limit on intake] for the most restrictive isotope, Th-234 (1.5E3 microcuries). Therefore part (ii) of 10 CFR 76.120(c)(1) was not met and reporting is not required.
"Based on the above information the subject notification should be retracted.
"This retraction has been discussed with the NRC Senior Resident Inspector."
R2DO (Nease) and NMSS EO (Benner) notified. |
| Power Reactor | Event Number: 49188 | Facility: DRESDEN
Region: 3 State: IL
Unit: [ ] [2] [3]
RX Type: [1] GE-1,[2] GE-3,[3] GE-3
NRC Notified By: JON PILLION
HQ OPS Officer: MARK ABRAMOVITZ | Notification Date: 07/14/2013
Notification Time: 16:29 [ET]
Event Date: 07/14/2013
Event Time: 16:00 [CDT]
Last Update Date: 07/14/2013 | Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
| Person (Organization):
JULIO LARA (R3DO)
|
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode | | 2 | N | Y | 100 | Power Operation | 100 | Power Operation | | 3 | N | Y | 100 | Power Operation | 100 | Power Operation | Event Text TECHNICAL SUPPORT CENTER OUT OF SERVICE FOR PLANNED PREVENTATIVE MAINTENANCE
"At 1600 CDT on Sunday, July 14, 2013, the Dresden Nuclear Power Station (DNPS) Technical Support Center (TSC) emergency ventilation system will be removed from service for planned preventative maintenance activities on the TSC air handling unit and air compressor units. During the maintenance, the TSC ventilation will be shut down. The TSC air filtration fan and dampers will be non-functional, rendering the TSC HVAC accident mode non-functional. This maintenance is scheduled to minimize out of service time. The planned TSC ventilation outage is scheduled to be completed within 48 hours. Contingency plans are in place so that if an emergency is declared requiring TSC activation during this period, the TSC will be staffed and activated using existing EP (Emergency Preparedness) procedures and checklists. If radiological or environmental conditions require TSC facility evacuation during ventilation system restoration, the Station Emergency Director will evacuate and relocate the TSC staff in accordance with station procedures.
"The NRC Resident Inspector has been notified." |
| Power Reactor | Event Number: 49189 | Facility: PILGRIM
Region: 1 State: MA
Unit: [1] [ ] [ ]
RX Type: [1] GE-3
NRC Notified By: KEVIN O'ROURKE
HQ OPS Officer: PETE SNYDER | Notification Date: 07/15/2013
Notification Time: 00:58 [ET]
Event Date: 07/15/2013
Event Time: 00:29 [EDT]
Last Update Date: 07/15/2013 | Emergency Class: UNUSUAL EVENT
10 CFR Section:
50.72(a) (1) (i) - EMERGENCY DECLARED
| Person (Organization):
WILLIAM COOK (R1DO)
MICHELE EVANS (NRR)
ERIC LEEDS (NRR)
DAVID LEW (R1)
SCOTT MORRIS (IRD)
|
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode | | 1 | N | Y | 100 | Power Operation | 100 | Power Operation | Event Text UNUSUAL EVENT DECLARED DUE TO LOSS OF CONTROL ROOM ANNUNCIATORS
The licensee declared a Notice of Unusual Event resulting from a loss of control room annunciators for greater than 15 minutes. The EAL Condition is SU 4.1. Compensatory measures have been established per Abnormal Operating Procedures. The plant continues to operate at 100 percent power.
The licensee has called for support staff to troubleshoot the issue. No other major components are out of service.
The licensee has notified the NRC Resident Inspector.
Notified DHS SWO, FEMA, DHS NICC and the Nuclear SSA via email.
* * * UPDATE FROM KEVIN O'ROURKE TO PETE SNYDER AT 0205 EDT ON 7/15/13 * * *
Annunciator indication has returned for some time and appears to be working. Engineering and electrical instrumentation and control staff are onsite to troubleshoot but have not established any cause. The licensee remains in the Unusual Event until additional confidence can be established in annunciator indication.
Notified R1DO (Cook). | |