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> June 3
Event Notification Report for June 3, 2005
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U.S. Nuclear Regulatory Commission
Operations Center
Event Reports For
06/02/2005 - 06/03/2005
** EVENT NUMBERS **
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| Power Reactor |
Event Number: 41742 |
Facility: DUANE ARNOLD
Region: 3 State: IA
Unit: [1] [ ] [ ]
RX Type: [1] GE-4
NRC Notified By: HANS OLSON
HQ OPS Officer: MARK ABRAMOVITZ
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Notification Date: 06/02/2005
Notification Time: 21:51 [ET]
Event Date: 06/02/2005
Event Time: 17:49 [CST]
Last Update Date: 06/02/2005
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Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(ii)(B) - UNANALYZED CONDITION
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Person (Organization):
SONIA BURGESS (R3)
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| Unit |
SCRAM Code |
RX CRIT |
Initial PWR |
Initial RX Mode |
Current PWR |
Current RX Mode |
| 1 |
N |
Y |
94 |
Power Operation |
94 |
Power Operation |
Event Text
APPENDIX R ASSESSMENT ON REMOTE SHUTDOWN PANEL
The licensee provided the following information via facsimile:
"On 6/2/05, while performing an Appendix 'R' assessment, it was determined that the capability to achieve and maintain safe shutdown conditions, as required by Appendix 'R', has not been adequately demonstrated. Specifically, a postulated fire requiring the evacuation of the Control Room could also cause a spurious hot short in the protective relaying circuitry for the credited division of essential electrical power and subsequent loss of that division. It was recently determined that the hot short could occur at anytime during the transient, whereas previous evaluations had assumed any such hot short would be associated with the initiating event. Consequently, existing compensatory measures would only be implemented if the adverse consequences were apparent, and therefore might not be implemented within the timeframe required to assure satisfactory results. The result is that Appendix 'R' requirements are not met, and an unanalyzed condition that significantly degrades plant safety may exist.
"A 30 day LCO was entered at 1749 per Tech Spec LCO 3.3.3.2 Function 4.e for the Remote Shutdown Panel 'B' Essential 4160 Instrumentation transfer and control."
The licensee notified the NRC Resident Inspector. |
| Power Reactor |
Event Number: 41743 |
Facility: TURKEY POINT
Region: 2 State: FL
Unit: [ ] [4] [ ]
RX Type: [3] W-3-LP,[4] W-3-LP
NRC Notified By: GRANT MELIN
HQ OPS Officer: BILL GOTT
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Notification Date: 06/03/2005
Notification Time: 01:00 [ET]
Event Date: 06/03/2005
Event Time: 00:33 [EDT]
Last Update Date: 06/03/2005
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Emergency Class: UNUSUAL EVENT
10 CFR Section:
50.72(a) (1) (i) - EMERGENCY DECLARED
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Person (Organization):
ROBERT HAAG (R2)
PATRICK HILAND (NRR)
TIM MCGINTY (IRD)
JOEL MUNDAY (R2)
INSUNG LEE (DHS)
CHRIS LIGGET (FEMA)
MIKE SMITH (DOE)
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| Unit |
SCRAM Code |
RX CRIT |
Initial PWR |
Initial RX Mode |
Current PWR |
Current RX Mode |
| 4 |
N |
N |
0 |
Hot Standby |
0 |
Hot Standby |
Event Text
DECLARED UNUSUAL EVENT DUE TO RCS LEAKAGE IN EXCESS OF TECHNICAL SPECIFICATION LIMIT
"Declared Unusual Event due to RCS leakage greater than 10 gallons per minute. VCT level is lowering with constant plant temperature, pressure and pressurizer level. VCT level lowering at approximately 19 gallons per minute with associated rise in RWST level approximately 20 gallons per minute."
The licensee will notify the NRC Resident Inspector.
* * * UPDATE FROM MELIN TO W. GOTT AT 0120 ON 06/03/05 * * *
The licensee briefed NRC Management (McGinty, P. Hiland, R. Haag, J Munday) that the leakage was verified to be CVCS leakage and not RCS leakage. The leakage was stopped at 0055 and the licensee is evaluating termination/retraction criteria. NRC will not enter Monitoring Mode.
* * * UPDATE FROM G MELIN TO W. GOTT AT 0140 ON 06/03/05 * * *
"At 0055, leakage stopped. Leakage verified to be CVCS leakage, not RCS. The leakage is stopped. Validating no other anomalies exist then will evaluate termination and retraction of UE notification."
* * * UPDATE FROM G MELIN TO P. SNYDER AT 0221 ON 06/03/05 * * *
"Notification of termination of Unusual Event. Plant validation complete. RCS gross leakage is 0.07 gallon per minute and plant parameters are stable. Leakage confirmed to be from CVCS system which has been isolated."
The licensee will notify the NRC Resident Inspector.
Notified R2DO (R. Haag), NRR EO (P. Hiland), IRD (T. McGinty), R2 (J. Munday), DHS (I. Lee), FEMA (C. Ligget), and DOE (M. Smith) |
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