Event Notification Report for December 17, 1999
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
12/16/1999 - 12/17/1999
Power Reactor
Event Number: 36522
Facility: SUSQUEHANNA
Region: 1 State: PA
Unit: [] [2] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: DON ROLAND
HQ OPS Officer: LEIGH TROCINE
Region: 1 State: PA
Unit: [] [2] []
RX Type: [1] GE-4,[2] GE-4
NRC Notified By: DON ROLAND
HQ OPS Officer: LEIGH TROCINE
Notification Date: 12/17/1999
Notification Time: 11:22 [ET]
Event Date: 12/17/1999
Event Time: 00:00 [EST]
Last Update Date: 12/17/1999
Notification Time: 11:22 [ET]
Event Date: 12/17/1999
Event Time: 00:00 [EST]
Last Update Date: 12/17/1999
Emergency Class: NON EMERGENCY
10 CFR Section:
10 CFR Section:
Person (Organization):
BILL RULAND (R1)
BILL RULAND (R1)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 2 | A/R | Y | 19 | Power Operation | 0 | Hot Shutdown |
COURTESY NOTIFICATION REGARDING ENTRY INTO A FORCED MAINTENANCE OUTAGE DUE TO RECIRCULATION PUMP SEAL PROBLEMS
The following text is a portion of a facsimile received from the licensee:
"Susquehanna Unit 2 was manually shut down on 12/17/99 [to] permit entry into containment for repairs to the 2A [reactor recirculation] pump #2 seal. At 2207 on 12/16/99, a controlled shutdown was commenced by reducing [recirculation] flow and then inserting control rods. At 0856 on 12/17/99, the main turbine was manually tripped with power at 18.5%. At 1018, with power at 19%, the reactor mode switch was taken to shutdown placing the unit in Mode 3. All control rods fully inserted. [Reactor] water level dropped to approximately 1 inch as recorded on wide range instrumentation and was restored using feedwater. There were no [emergency core cooling system] initiations or diesel generator starts. No safety/relief valves lifted. There were no challenges to containment or fuel as a result of the shutdown. The maximum total unidentified drywell leakage was 0.87 gpm, and maximum total leakage was 1.93 gpm. The leakage remained well below the [Technical Specification] 3.4.4 required limits at all times."
"The [engineered safety feature] actuation of the reactor protection system and the resulting level 3 isolations are not reportable since it is procedurally recognized as pre-planned."
"The shutdown is continuing according to the forced outage schedule."
The licensee notified the NRC resident inspector and issued a press release.
The following text is a portion of a facsimile received from the licensee:
"Susquehanna Unit 2 was manually shut down on 12/17/99 [to] permit entry into containment for repairs to the 2A [reactor recirculation] pump #2 seal. At 2207 on 12/16/99, a controlled shutdown was commenced by reducing [recirculation] flow and then inserting control rods. At 0856 on 12/17/99, the main turbine was manually tripped with power at 18.5%. At 1018, with power at 19%, the reactor mode switch was taken to shutdown placing the unit in Mode 3. All control rods fully inserted. [Reactor] water level dropped to approximately 1 inch as recorded on wide range instrumentation and was restored using feedwater. There were no [emergency core cooling system] initiations or diesel generator starts. No safety/relief valves lifted. There were no challenges to containment or fuel as a result of the shutdown. The maximum total unidentified drywell leakage was 0.87 gpm, and maximum total leakage was 1.93 gpm. The leakage remained well below the [Technical Specification] 3.4.4 required limits at all times."
"The [engineered safety feature] actuation of the reactor protection system and the resulting level 3 isolations are not reportable since it is procedurally recognized as pre-planned."
"The shutdown is continuing according to the forced outage schedule."
The licensee notified the NRC resident inspector and issued a press release.
General Information or Other
Event Number: 36708
Rep Org: NINE MILE POINT UNIT TWO
Licensee: STONE AND WEBSTER ENGINEERING CORPORATION
Region: 1
City: LYCOMING State: NY
County:
License #:
Agreement: Y
Docket:
NRC Notified By: STEVE LEONARD
HQ OPS Officer: DOUG WEAVER
Licensee: STONE AND WEBSTER ENGINEERING CORPORATION
Region: 1
City: LYCOMING State: NY
County:
License #:
Agreement: Y
Docket:
NRC Notified By: STEVE LEONARD
HQ OPS Officer: DOUG WEAVER
Notification Date: 02/18/2000
Notification Time: 14:24 [ET]
Event Date: 12/17/1999
Event Time: 12:00 [EST]
Last Update Date: 02/18/2000
Notification Time: 14:24 [ET]
Event Date: 12/17/1999
Event Time: 12:00 [EST]
Last Update Date: 02/18/2000
Emergency Class: NON EMERGENCY
10 CFR Section:
21.21 - UNSPECIFIED PARAGRAPH
10 CFR Section:
21.21 - UNSPECIFIED PARAGRAPH
Person (Organization):
FRANK COSTELLO (R1)
VERN HODGE (NRR)
FRANK COSTELLO (R1)
VERN HODGE (NRR)
PART 21 - NON-CONSERVATISM IN ENVIRONMENTAL QUALIFICATION (EQ) CALCULATIONS
1-. Affected unit: Nine Mile Point Unit 2
2- Components that contain defect/deviation: Miscellaneous components (limitorque operators electrical cables etc.) in environmental qualification (EQ) program
3- Firm supplying components/activity: Stone and Webster Engineering Corporation (SWEC)
4- Nature of defect/deviation: non-conservatism in EQ calculations (lowest expected ambient temperatures used instead of normal expected ambient temperatures for winter periods). About 30 components will have qualified lives reduced from greater than 40 years to less than 40 years, when non-conservatism is removed. Several hundred other components will have qualified lives reduced but not to less than 40 years.
5- Date on which information was obtained (discovery date): December 17. 1999
6- Number and location of components: potentially numerous components in multiple systems at multiple locations.
7- Corrective actions: EQ calculations and Environmental Qualification Engineering Design Criteria document, which was source of erroneous data for the EQ calculations, will be corrected prior to expiration of actual qualified lives of affected EQ components i.e., within a few years.
1-. Affected unit: Nine Mile Point Unit 2
2- Components that contain defect/deviation: Miscellaneous components (limitorque operators electrical cables etc.) in environmental qualification (EQ) program
3- Firm supplying components/activity: Stone and Webster Engineering Corporation (SWEC)
4- Nature of defect/deviation: non-conservatism in EQ calculations (lowest expected ambient temperatures used instead of normal expected ambient temperatures for winter periods). About 30 components will have qualified lives reduced from greater than 40 years to less than 40 years, when non-conservatism is removed. Several hundred other components will have qualified lives reduced but not to less than 40 years.
5- Date on which information was obtained (discovery date): December 17. 1999
6- Number and location of components: potentially numerous components in multiple systems at multiple locations.
7- Corrective actions: EQ calculations and Environmental Qualification Engineering Design Criteria document, which was source of erroneous data for the EQ calculations, will be corrected prior to expiration of actual qualified lives of affected EQ components i.e., within a few years.