United States Nuclear Regulatory Commission - Protecting People and the Environment
Home > NRC Library > Document Collections > Reports Associated with Events > Event Notification Reports > 2009 > November 2

Event Notification Report for November 2, 2009

U.S. Nuclear Regulatory Commission
Operations Center

Event Reports For
10/30/2009 - 11/02/2009

** EVENT NUMBERS **


45316 45470

To top of page
!!!!! THIS EVENT HAS BEEN RETRACTED. THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor Event Number: 45316
Facility: GRAND GULF
Region: 4 State: MS
Unit: [1] [ ] [ ]
RX Type: [1] GE-6
NRC Notified By: TERRY HOLCOMBE
HQ OPS Officer: BILL HUFFMAN
Notification Date: 08/31/2009
Notification Time: 18:16 [ET]
Event Date: 08/31/2009
Event Time: 10:14 [CDT]
Last Update Date: 10/30/2009
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL
Person (Organization):
THOMAS FARNHOLTZ (R4DO)

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

SECONDARY CONTAINMENT BOUNDARY DOOR INOPERABLE

"During normal entry / exit through secondary containment boundary door 1A401, it was discovered that the door would not latch closed due to interferences between the door and its frame. The door was unable to be latched closed for approximately 5 minutes which represented a possible path for uncontrolled release of radioactive material. No release of radioactive material occurred as a result of this event.

"The time during which the door would not latch was spent diligently troubleshooting to determine why the door would not secure. When discovered, the interference was immediately removed and the door was secured (latched). Door 1A401 is now operable as a secondary containment boundary but is currently deactivated and posted by security to prevent use as a conservative measure until further inspection and maintenance can be preformed on the door to prevent this issue from reoccurring.

"At this time secondary containment is operable with boundary door 1A401 closed and latched."

The licensee has notified the NRC Resident Inspector.


* * * UPDATE FROM MICHAEL J. LARSON TO DONALD NORWOOD AT 1042 EDT ON 10/30/09 * * *

"Retraction of Notification EN# 45316.

"The event was reported by Grand Gulf Nuclear Station on 08/31/2009 at 1014 CDT. This update is being provided for the purpose of retracting that notification.

"On August 31, 2009, during normal entry/exit through secondary containment boundary door 1A401, it was discovered that the door would not latch closed due to interferences between the door and its frame. The door was unable to be latched closed for approximately 5 minutes which represented a possible loss of safety function since it could have provided a path for uncontrolled release of radioactive material. No release of radioactive material occurred as a result of this event.

"As part of the event investigation, the malfunction (inability to close and latch) of door 1A401 was simulated under controlled conditions. Data was obtained under normal ventilation conditions and under the condition with one train of Standby Gas Treatment System (SGT) operating. Analysis of the data determined that the SGT system was able to drawdown the secondary containment enclosure building pressure to greater than 0.311 inch of vacuum water gauge (for no assumed failures) which is above the Technical Specification (TS) 3.6.4.1 surveillance minimum requirement of 0.266 inch of vacuum water gauge (following a postulated accident with assumed failures) using one SGT subsystem.

"Therefore, this event did not constitute a loss of the safety function of secondary containment and this event is not reportable."

The licensee notified the NRC Resident Inspector. Notified R4DO (Powers).

To top of page
General Information or Other Event Number: 45470
Rep Org: SOUTH CAROLINA DEPARTMENT OF HEALTH
Licensee: F&ME CONSULTANTS
Region: 1
City: COLUMBIA State: SC
County:
License #: 293
Agreement: Y
Docket:
NRC Notified By: MELINDA BRADSHAW
HQ OPS Officer: CHARLES TEAL
Notification Date: 10/28/2009
Notification Time: 11:20 [ET]
Event Date: 10/27/2009
Event Time: 14:00 [EDT]
Last Update Date: 10/28/2009
Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
Person (Organization):
JOHN CARUSO (R1DO)
GLENDA VILLAMAR (FSME)

Event Text

AGREEMENT STATE - MOISTURE DENSITY GAUGE DAMAGED AT CONSTRUCTION SITE

The following was received from the state via fax:

"The SC [South Carolina] Department of Health and Environmental Control (SCDHEC) was notified Tuesday, October 27, 2009 at 2:10 p.m. that a Humboldt Model 5001 portable moisture density gauge had been damaged on a job site in North Charleston, SC. The gauge contained 11 milliCurie maximum of Cesium 137 and 44 milliCuries maximum of Americium 241/Be. [The] F&ME employee notified the department (SCDHEC) that a gauge technician had been in the process of performing a standardization test with the gauge when it was hit by a motor grader. [The company representative] was present at the job site when the event occurred. [The company representative] informed SCDHEC that the area had been secured with both the gauge and motor grader within the perimeter. [The company representative] was advised to maintain surveillance of the gauge until SCDHEC personnel could respond.

"Once on site, SCDHEC personnel determined there was no release of radioactive material and that the Cesium 137 source was still in the locked position. The gauge was placed in its storage container and secured. The licensee informed SCDHEC that he would transport the damaged gauge back to the home office in Columbia, SC that same evening and secure it until the manufacturer could be contacted on Wednesday, October 28, 2009. The licensee would then follow the manufacturer's instructions for the disposition of the device. As more information is available, this notice will be updated. The licensee was advised that a written report detailing this event must be submitted to the department (SCDHEC) within 30 days. The event is open and pending further investigation by the licensee and the department (SCDHEC). Updates will be made through the NMED (Nuclear Materials Event Database) system."

Page Last Reviewed/Updated Thursday, March 29, 2012
Thursday, March 29, 2012