Event Notification Report for April 26, 2014
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
04/25/2014 - 04/26/2014
EVENT NUMBERS
50061
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
!!!!! THIS EVENT HAS BEEN RETRACTED !!!!!
Power Reactor
Event Number: 50061
Facility: SUSQUEHANNA
Region: 1 State: PA
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: DOUG LaMARCA
HQ OPS Officer: STEVE SANDIN
Region: 1 State: PA
Unit: [1] [] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: DOUG LaMARCA
HQ OPS Officer: STEVE SANDIN
Notification Date: 04/27/2014
Notification Time: 01:45 [ET]
Event Date: 04/26/2014
Event Time: 23:22 [EDT]
Last Update Date: 05/14/2014
Notification Time: 01:45 [ET]
Event Date: 04/26/2014
Event Time: 23:22 [EDT]
Last Update Date: 05/14/2014
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(ii)(A) - DEGRADED CONDITION
10 CFR Section:
50.72(b)(3)(ii)(A) - DEGRADED CONDITION
Person (Organization):
JAMES DWYER (R1DO)
JAMES DWYER (R1DO)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | N | 0 | Refueling | 0 | Refueling |
MINIMUM PATHWAY LIMIT OF MSIV COMBINED LEAKAGE EXCEEDED DURING SURVEILLANCE TESTING
"On 4/26/14 at 2322 EDT it was determined that the combined leakage for Main Steam Isolation Valves (including MSIV's, Main Steam Line Drains, HPCI Steam Supply and RCIC Steam Supply) per SR [Surveillance Requirement] 3.6.1.3.12 exceeded the minimum pathway limit of 300 scfh [standard cubic feet per hour]. The MSIV Combined leakrate of 309 scfh exceeded the limit of 300 scfh with the Local Leak Rate Test failure of the HPCI Steam Supply Outboard Isolation Valve.
"This event is being reported as a degraded condition pursuant to 10CFR50.72(b)(3)(ii), as it was discovered that the required leakage limits were exceeded."
The licensee informed the NRC Resident Inspector.
* * * UPDATE AT 1415 EDT ON 05/14/14 FROM JAY BARNES TO S. SANDIN * * *
The licensee is retracting this event based on the following:
"Subsequent engineering review identified an administrative error with procedures used to calculate MSIV leakage. Recalculation using revised procedures resulted in a MSIV Combined leakrate of 129 scfh, which is below the associated minimum pathway limit of 300 scfh specified in SR 3.6.1.3.12.
"Therefore, this condition is not reportable and EN 50061 is being retracted."
The licensee informed the NRC Resident Inspector. Notified R1DO (Jackson).
"On 4/26/14 at 2322 EDT it was determined that the combined leakage for Main Steam Isolation Valves (including MSIV's, Main Steam Line Drains, HPCI Steam Supply and RCIC Steam Supply) per SR [Surveillance Requirement] 3.6.1.3.12 exceeded the minimum pathway limit of 300 scfh [standard cubic feet per hour]. The MSIV Combined leakrate of 309 scfh exceeded the limit of 300 scfh with the Local Leak Rate Test failure of the HPCI Steam Supply Outboard Isolation Valve.
"This event is being reported as a degraded condition pursuant to 10CFR50.72(b)(3)(ii), as it was discovered that the required leakage limits were exceeded."
The licensee informed the NRC Resident Inspector.
* * * UPDATE AT 1415 EDT ON 05/14/14 FROM JAY BARNES TO S. SANDIN * * *
The licensee is retracting this event based on the following:
"Subsequent engineering review identified an administrative error with procedures used to calculate MSIV leakage. Recalculation using revised procedures resulted in a MSIV Combined leakrate of 129 scfh, which is below the associated minimum pathway limit of 300 scfh specified in SR 3.6.1.3.12.
"Therefore, this condition is not reportable and EN 50061 is being retracted."
The licensee informed the NRC Resident Inspector. Notified R1DO (Jackson).