Event Notification Report for November 04, 2001
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
11/03/2001 - 11/04/2001
EVENT NUMBERS
38463
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 38463
Facility: VERMONT YANKEE
Region: 1 State: VT
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: DENNIS MAY
HQ OPS Officer: STEVE SANDIN
Region: 1 State: VT
Unit: [1] [] []
RX Type: [1] GE-4
NRC Notified By: DENNIS MAY
HQ OPS Officer: STEVE SANDIN
Notification Date: 11/04/2001
Notification Time: 13:44 [ET]
Event Date: 11/04/2001
Event Time: 11:42 [EST]
Last Update Date: 12/20/2001
Notification Time: 13:44 [ET]
Event Date: 11/04/2001
Event Time: 11:42 [EST]
Last Update Date: 12/20/2001
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(ii)(A) - DEGRADED CONDITION 50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL
10 CFR Section:
50.72(b)(3)(ii)(A) - DEGRADED CONDITION 50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL
Person (Organization):
R1 IRC TEAM MANAGER (R1)
R1 IRC TEAM MANAGER (R1)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 100 | Power Operation | 100 | Power Operation |
LOSS OF CONTAINMENT INTEGRITY
"At 0525[EST] the Control Room received a low flow alarm as a result of a leaking 1/4 inch fitting on the 'B' Hydrogen/Oxygen analyzer. At 1142[EST] it was determined, as a result of a leak rate test, that the maximum allowable test leak rate (La) was potentially exceeded. The system was isolated within 5 minutes of receiving the alarm. A 24 hour hour shutdown LCO (TS 3.7.A.8) was entered at 0525[EST] and exited at 0530[EST]."
The licensee will inform both the State of Vermont and the NRC Resident Inspector.
Hoo Note: A similar problem related to this particular monitor was reported on 10/30/01 - see event #38444.
* * * UPDATE 1317EST ON 12/20/01 FROM KELLY ROBINSON TO S. SANDIN * * *
The licensee is retracting this report based on the following:
"Systems Engineering completed a Technical Evaluation (2001-061) on November 20, 2001 which concluded, 'When the combined minimum pathway flow (89 scfh) is added to the resultant, the value is less than 0.6La (193 .674 scfh). The condition that existed (i.e., the crack before tightening, the discovered condition) did not compromise Primary Containment Integrity. The results are conservative.'
"This Technical Evaluation demonstrates that the Technical Specification for system leakage and combined minimum pathway were not exceeded. Primary Containment was capable of performing and fulfilling its specified safety function, without operator intervention.
"Therefore, ENS Event Number 38463, made on 11/04/01, is being retracted."
The licensee will inform the NRC Resident Inspector. Notified R1DO(Kinneman).
"At 0525[EST] the Control Room received a low flow alarm as a result of a leaking 1/4 inch fitting on the 'B' Hydrogen/Oxygen analyzer. At 1142[EST] it was determined, as a result of a leak rate test, that the maximum allowable test leak rate (La) was potentially exceeded. The system was isolated within 5 minutes of receiving the alarm. A 24 hour hour shutdown LCO (TS 3.7.A.8) was entered at 0525[EST] and exited at 0530[EST]."
The licensee will inform both the State of Vermont and the NRC Resident Inspector.
Hoo Note: A similar problem related to this particular monitor was reported on 10/30/01 - see event #38444.
* * * UPDATE 1317EST ON 12/20/01 FROM KELLY ROBINSON TO S. SANDIN * * *
The licensee is retracting this report based on the following:
"Systems Engineering completed a Technical Evaluation (2001-061) on November 20, 2001 which concluded, 'When the combined minimum pathway flow (89 scfh) is added to the resultant, the value is less than 0.6La (193 .674 scfh). The condition that existed (i.e., the crack before tightening, the discovered condition) did not compromise Primary Containment Integrity. The results are conservative.'
"This Technical Evaluation demonstrates that the Technical Specification for system leakage and combined minimum pathway were not exceeded. Primary Containment was capable of performing and fulfilling its specified safety function, without operator intervention.
"Therefore, ENS Event Number 38463, made on 11/04/01, is being retracted."
The licensee will inform the NRC Resident Inspector. Notified R1DO(Kinneman).