Event Notification Report for June 11, 2006
U.S. Nuclear Regulatory Commission
Operations Center
EVENT REPORTS FOR
06/10/2006 - 06/11/2006
Power Reactor
Event Number: 42630
Facility: NINE MILE POINT
Region: 1 State: NY
Unit: [1] [] []
RX Type: [1] GE-2,[2] GE-5
NRC Notified By: ERIC KELSEY
HQ OPS Officer: BILL HUFFMAN
Region: 1 State: NY
Unit: [1] [] []
RX Type: [1] GE-2,[2] GE-5
NRC Notified By: ERIC KELSEY
HQ OPS Officer: BILL HUFFMAN
Notification Date: 06/11/2006
Notification Time: 03:51 [ET]
Event Date: 06/11/2006
Event Time: 01:26 [EDT]
Last Update Date: 06/11/2006
Notification Time: 03:51 [ET]
Event Date: 06/11/2006
Event Time: 01:26 [EDT]
Last Update Date: 06/11/2006
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(i) - PLANT S/D REQD BY TS
10 CFR Section:
50.72(b)(2)(i) - PLANT S/D REQD BY TS
Person (Organization):
LAWRENCE DOERFLEIN (R1)
LAWRENCE DOERFLEIN (R1)
| Unit | SCRAM Code | RX Crit | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode |
|---|---|---|---|---|---|---|
| 1 | N | Y | 45 | Power Operation | 25 | Power Operation |
TECHNICAL SPECIFICATION SHUTDOWN DUE TO HIGH RCS DRYWELL LEAKAGE
"At 01:26 on 6/11/2006 Nine Mile Point Unit 1 experienced a rise in drywell leakage of 2 gallons per minute increase of unidentified leakage in a 24 hour period [placing the Unit in an LCO] per Technical Specification 3.2.5.a.2. Present Drywell leakage is 2.33 gpm.
"A normal orderly shutdown commenced at 01:26, per Technical Specification 3.2.5.b, [to] place the reactor in cold shutdown within 24 hours.
"Drywell leakage has trended up very slowly over the past several weeks. On 6/10/2006 the plant reduced power, deinerted the primary containment, [and] attempted to repair packing leak on VLV-32-194. [This valve is a 1 inch drain valve on recirculation pump #12]. Following attempts to repair [the] valve, [the] plant inerted the primary containment [and] raised power to approximately 45% while main condenser tube cleaning continued. Unidentified drywell leakage began rising at a faster rate beginning on 6/10/2006 at 17:55."
Drywell leakage has stabilized at a little over 2 gpm. The TS shutdown is required because of the 2 gpm increase in leak rate over the last 24 hour period. There are no other equipment operability concerns or TS LCOs that present a challenge to a normal safe plant shutdown.
The licensee notified the NRC Resident Inspector.
"At 01:26 on 6/11/2006 Nine Mile Point Unit 1 experienced a rise in drywell leakage of 2 gallons per minute increase of unidentified leakage in a 24 hour period [placing the Unit in an LCO] per Technical Specification 3.2.5.a.2. Present Drywell leakage is 2.33 gpm.
"A normal orderly shutdown commenced at 01:26, per Technical Specification 3.2.5.b, [to] place the reactor in cold shutdown within 24 hours.
"Drywell leakage has trended up very slowly over the past several weeks. On 6/10/2006 the plant reduced power, deinerted the primary containment, [and] attempted to repair packing leak on VLV-32-194. [This valve is a 1 inch drain valve on recirculation pump #12]. Following attempts to repair [the] valve, [the] plant inerted the primary containment [and] raised power to approximately 45% while main condenser tube cleaning continued. Unidentified drywell leakage began rising at a faster rate beginning on 6/10/2006 at 17:55."
Drywell leakage has stabilized at a little over 2 gpm. The TS shutdown is required because of the 2 gpm increase in leak rate over the last 24 hour period. There are no other equipment operability concerns or TS LCOs that present a challenge to a normal safe plant shutdown.
The licensee notified the NRC Resident Inspector.
Power Reactor
Event Number: 42631
Facility: HARRIS
Region: 2 State: NC
Unit: [1] [] []
RX Type: [1] W-3-LP
NRC Notified By: DEWAYNE BAGLEY
HQ OPS Officer: JEFF ROTTON
Region: 2 State: NC
Unit: [1] [] []
RX Type: [1] W-3-LP
NRC Notified By: DEWAYNE BAGLEY
HQ OPS Officer: JEFF ROTTON
Notification Date: 06/12/2006
Notification Time: 02:35 [ET]
Event Date: 06/11/2006
Event Time: 22:56 [EDT]
Last Update Date: 06/12/2006
Notification Time: 02:35 [ET]
Event Date: 06/11/2006
Event Time: 22:56 [EDT]
Last Update Date: 06/12/2006
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
Person (Organization):
DAVID AYRES (R2)
DAVID AYRES (R2)
| 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 20% OF OFFSITE EMERGENCY SIRENS DUE TO SEVERE WEATHER
"As of 10:56 P.M. EDT, [on 06/11/06] more than 20% of the offsite emergency sirens were inoperable for greater than one hour due to loss of power caused by severe weather/thunderstorms passing through the area. At 10:56 P.M. 21 of 81 sirens were out of service. At this time, the Harris Plant cannot estimate the time of siren recovery. However, crews are currently in the field surveying the damage and restoring power. This requires an 8-hour non-Emergency notification per 10CFR 50.72(b)(3)(xiii) due to the loss of a significant portion of the offsite notification system. As of 01:40 A.M. 6/12/06, 16 of 81 sirens are out of service."
The state and local emergency response organizations will implement compensatory measure of route alerting in the areas of the siren malfunction if needed during an emergency.
The licensee notified the NRC Resident Inspector. The licensee also notified the North Carolina State EOC and the local counties of Chatham, Lee, Harnett, and Wake.
"As of 10:56 P.M. EDT, [on 06/11/06] more than 20% of the offsite emergency sirens were inoperable for greater than one hour due to loss of power caused by severe weather/thunderstorms passing through the area. At 10:56 P.M. 21 of 81 sirens were out of service. At this time, the Harris Plant cannot estimate the time of siren recovery. However, crews are currently in the field surveying the damage and restoring power. This requires an 8-hour non-Emergency notification per 10CFR 50.72(b)(3)(xiii) due to the loss of a significant portion of the offsite notification system. As of 01:40 A.M. 6/12/06, 16 of 81 sirens are out of service."
The state and local emergency response organizations will implement compensatory measure of route alerting in the areas of the siren malfunction if needed during an emergency.
The licensee notified the NRC Resident Inspector. The licensee also notified the North Carolina State EOC and the local counties of Chatham, Lee, Harnett, and Wake.