| U.S. Nuclear Regulatory Commission
Operations Center Event Reports For
12/09/2009 - 12/10/2009 ** EVENT NUMBERS ** |
 | General Information or Other | Event Number: 45540 | Rep Org: PA BUREAU OF RADIATION PROTECTION
Licensee: FOX CHASE CANCER CENTER
Region: 1
City: PHILADELPHIA State: PA
County:
License #: PA-0293
Agreement: Y
Docket:
NRC Notified By: DAVID ALLARD
HQ OPS Officer: VINCE KLCO | Notification Date: 12/03/2009
Notification Time: 17:19 [ET]
Event Date: 09/02/2009
Event Time: [EST]
Last Update Date: 12/03/2009 | Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
| Person (Organization):
DANIEL HOLODY (R1DO)
BILL VONTILL (FSME)
| Event Text AGREEMENT STATE REPORT - MEDICAL DOSE DIFFERENT THAN PRESCRIBED
The following information was received via facsimile:
"This incident was reported to the DEP [Pennsylvania Department of Environmental Protection Bureau of Radiation Protection] Eastern Regional Office by the licensee via a phone call on September 3, 2009, but wasn't considered a ME [Medical Event] by DEP at the time. On September 2, 2009 a patient was prescribed a dose of 150 millicuries (mCi) of radioactive iodine-131 (I-131) for a therapeutic treatment of thyroid cancer. The nuclear medicine technologist took the 150 mCi dose to the patient's room in a lead container and made the appropriate tube connections. The connections were checked with water prior to administration of the I-131 and no leaks were present. The dose was administered. During the flushing process, the technologist noted some leakage of liquid on the absorbent material that was placed under the tubing. The syringe, tubing, and absorbent material were immediately removed and assayed in the dose calibrator. It was determined that 57.6% of the prescribed dose had been administered to the patient. A second written directive for an additional dose prescribed by the authorized user was delivered to provide assurance that the patient received the appropriate complete amount of radioactive iodine for treatment of the thyroid cancer.
"During an inspection of Fox Chase on December 1, 2009, this incident was reviewed by the DEP. At this point the licensee informed DEP that they considered this a ME, had notified the patient, thus, the reason for this fax ME notification to the NRC HOO [Headquarter Operation Officer] at this point in time. Additional details will be provided in the NMED report."
Pennsylvania Event Report: PA090034.
A Medical Event may indicate potential problems in a medical facility's use of radioactive materials. It does not necessarily result in harm to the patient. |
| General Information or Other | Event Number: 45542 | Rep Org: MA RADIATION CONTROL PROGRAM
Licensee: UMASS MEMORIAL HEALTH CARE
Region: 1
City: WORCESTER State: MA
County:
License #: 60-0092
Agreement: Y
Docket:
NRC Notified By: MIKE WHALEN
HQ OPS Officer: VINCE KLCO | Notification Date: 12/07/2009
Notification Time: 11:47 [ET]
Event Date: 09/11/2009
Event Time: [EST]
Last Update Date: 12/07/2009 | Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
| Person (Organization):
WAYNE SCHMIDT (R1DO)
ANGELA MCINTOSH (FSME)
|
| This material event contains a "Less than Cat 3" level of radioactive material. | Event Text AGREEMENT STATE REPORT- POTENTIAL LOSS OF RADIOACTIVE MATERIAL
The following information was received from the Commonwealth of Massachusetts via facsimile:
"On 9/11/09 a package containing 1 mCi of P-32 was received by the licensee Radiation Safety Office, [who then] opened the package to confirm RAM [radioactive material] was in the box, surveyed the package, and then delivered [the package] to the research lab. The research lab signed for the package. One week later the research lab reported to the RSO that the package did not contain the ordered P-32. A search of lab, adjacent labs, and waste removed from the lab did not locate the missing radioactive material."
MA Docket Number: 10-8699
THIS MATERIAL EVENT CONTAINS A "LESS THAN CAT 3" LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf
This source is not amongst those sources or devices identified by the IAEA Code of Conduct for the Safety & Security of Radioactive Sources to be of concern from a radiological standpoint. Therefore is it being categorized as a less than Category 3 source |
| Other Nuclear Material | Event Number: 45543 | Rep Org: US ARMY CECOM
Licensee: US ARMY CECOM
Region: 1
City: FT MONMOUTH State: NJ
County:
License #: 29-01022-14
Agreement: Y
Docket:
NRC Notified By: BARRY SILBER
HQ OPS Officer: DONG HWA PARK | Notification Date: 12/07/2009
Notification Time: 15:33 [ET]
Event Date: 11/30/2009
Event Time: [EST]
Last Update Date: 12/09/2009 | Emergency Class: NON EMERGENCY
10 CFR Section:
20.2201(a)(1)(ii) - LOST/STOLEN LNM>10X
| Person (Organization):
WAYNE SCHMIDT (R1DO)
MONTE PHILLIPS (R3DO)
BILL VONTILL (FSME)
|
| This material event contains a "Less than Cat 3" level of radioactive material. | Event Text LOSS OF CONTROL OF A NUCLEAR GAUGE
On November 30, 2009, the US Army Communications and Electronics Command (CECOM) discovered that a licensed nuclear scanning device was missing. [The device location is REDACTED]. The device is an Ohmart VM00055 that is a part of a mobile vehicle and cargo system made by Science Applications International Corporation (SAIC). The source is a 1.6 Ci, CS-137 source with a source number: 3231CG.
* * * UPDATE FROM BARRY SILBER TO DONG PARK AT 1422 ON 12/8/09 * * *
A request made by Headquarters Department of Army Radiation Safety Officer was processed.
Notified R1DO (Schmidt), R3DO (Phillips), FSME (Burgess).
* * * UPDATE FROM BARRY SILBER TO VINCE KLCO AT 1625 ON 12/09/09 * * *
The licensee called to clarify that on November 30, 2009, Fort Drum discovered the device was missing and then an investigation ensued.
On December 7, 2009, Fort Drum successfully notified the US Army CECOM Life Cycle Management Command that a licensed nuclear scanning device was missing. The device is postulated to be located on a maritime security vessel.
Notified R1DO (Schmidt), R3DO (Phillips), FSME (Einberg)
THIS MATERIAL EVENT CONTAINS A "LESS THAN CAT 3" LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf |
| General Information or Other | Event Number: 45545 | Rep Org: MISSISSIPPI DIV OF RAD HEALTH
Licensee: TERRA MISSISSIPPI NITROGEN, INC.
Region: 4
City: YAZOO CITY State: MS
County:
License #: MS-571-01
Agreement: Y
Docket:
NRC Notified By: ALI SHAFQAT
HQ OPS Officer: VINCE KLCO | Notification Date: 12/07/2009
Notification Time: 16:26 [ET]
Event Date: 07/14/2009
Event Time: [CST]
Last Update Date: 12/07/2009 | Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
| Person (Organization):
BLAIR SPITZBERG (R4DO)
BILL VONTILL (FSME)
| Event Text AGREEMENT STATE REPORT - GAUGE SHUTTER FAILS TO FUNCTION
The following information was received by email:
"On 07-14-09 while conducting a biannual inventory of gauges, licensee discovered that shutter on the Ronan X92-SA-1, Serial No. 74584, was not functioning. The licensee contacted Ronan, who repaired the shutter on 08-05-09. Although the necessary repairs were made, it was found that future service of the shutter would require replacing the current shutter with a new shutter.
"DRH was notified of the incident on 11-04-09 while doing a routine inspection of the licensee. DRH closed out with the licensee and received documentation of the incident."
The gauge contains the isotope Cs-137 with an activity of 20mCi.
Mississippi Incident Number: MS 09007 |
| General Information or Other | Event Number: 45546 | Rep Org: CALIFORNIA RADIATION CONTROL PRGM
Licensee: CPN INSTROTEK
Region: 4
City: CONCORD State: CA
County:
License #: CA1100-07
Agreement: Y
Docket:
NRC Notified By: KENT PRENDERGAST
HQ OPS Officer: DONG HWA PARK | Notification Date: 12/07/2009
Notification Time: 19:48 [ET]
Event Date: 12/07/2009
Event Time: 11:18 [PST]
Last Update Date: 12/07/2009 | Emergency Class: NON EMERGENCY
10 CFR Section:
AGREEMENT STATE
| Person (Organization):
BLAIR SPITZBERG (R4DO)
BILL VONTILL (FSME)
MEXICO VIA FAX ()
|
| This material event contains a "Less than Cat 3" level of radioactive material. | Event Text AGREEMENT STATEMENT REPORT - STOLEN NUCLEAR GAUGE FROM A DELIVERY TRUCK
The following notification was received via email:
"On December 7, 2009, CPN Instrotek, California License CA1100-07, reported that a MC-3 gauge was stolen from a delivery truck while it was being transported to CPM Instrotek. The gauge is Serial Number M36046710. The gauge contains 10mCi of CS 137 and 50mCi of Am/Be.
"This theft was reported by CPN Instrotek on Monday, December 07, 2009 1118 AM by email. The report was made by [the] Radiation Safety Officer [RSO] for CPN Instrotek. [The RSO] reported that CPN Instrotek had received a call on the morning of December 7, 2009 from the transport company that was transporting the gauge from the airport to CPN Instrotek (both in Concord California). The transport company stated that the gauge was stolen from one of their trucks between the evening of December 4th and the morning of December 7, 2009. The truck was locked. The transport company had picked up the gauge at the airport and it was being delivered to CPN Instrotek in Concord. The gauge was being returned to CPN Instrotek for disposal. The loss was reported to local law enforcement. "
California Event Number: N/A
THIS MATERIAL EVENT CONTAINS A "LESS THAN CAT 3" LEVEL OF RADIOACTIVE MATERIAL
Sources that are "Less than IAEA Category 3 sources," are either sources that are very unlikely to cause permanent injury to individuals or contain a very small amount of radioactive material that would not cause any permanent injury. Some of these sources, such as moisture density gauges or thickness gauges that are Category 4, the amount of unshielded radioactive material, if not safely managed or securely protected, could possibly - although it is unlikely - temporarily injure someone who handled it or were otherwise in contact with it, or who were close to it for a period of many weeks. For additional information go to http://www-pub.iaea.org/MTCD/publications/PDF/Pub1227_web.pdf |
| Power Reactor | Event Number: 45551 | Facility: KEWAUNEE
Region: 3 State: WI
Unit: [1] [ ] [ ]
RX Type: [1] W-2-LP
NRC Notified By: CRAIG NEUSER
HQ OPS Officer: PETE SNYDER | Notification Date: 12/09/2009
Notification Time: 10:34 [ET]
Event Date: 12/09/2009
Event Time: 08:00 [CST]
Last Update Date: 12/09/2009 | Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
| Person (Organization):
MONTE PHILLIPS (R3)
|
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode | | 1 | N | Y | 100 | Power Operation | 100 | Power Operation | Event Text BLIZZARD RESULTS IN GREATER THAN 50% SIREN COVERAGE LOSS
"On December 9 at 0800 CST, seven emergency notification system sirens in Kewaunee Power Station Emergency Planning Zone were reported out of service. It is expected the cause of the sirens to be out of service is the severe winter weather. The loss of these emergency notification sirens results in a lost population coverage of 56%. As a result, this event is being reported under 10CFR50.72(b)(3)(xiii) and guidance in NUREG-1022 as a major loss of off-site communications capability.
"It is unknown, at this time, when the sirens will be returned to service."
The licensee notified the NRC Resident Inspector. |
| Power Reactor | Event Number: 45552 | Facility: INDIAN POINT
Region: 1 State: NY
Unit: [2] [3] [ ]
RX Type: [2] W-4-LP,[3] W-4-LP
NRC Notified By: BRIAN ROKES
HQ OPS Officer: CHARLES TEAL | Notification Date: 12/09/2009
Notification Time: 14:55 [ET]
Event Date: 12/09/2009
Event Time: 11:01 [EST]
Last Update Date: 12/09/2009 | Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
| Person (Organization):
WAYNE SCHMIDT (R1DO)
|
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode | | 2 | N | Y | 100 | Power Operation | 100 | Power Operation | | 3 | N | Y | 100 | Power Operation | 100 | Power Operation | Event Text EMERGENCY SIRENS FAILED TO ACTIVATE
"On December 9, 2009, at approximately 1101 EST, as a result of a scheduled full-volume test of the Indian Point Energy Center (IPEC) Alert Notification System (ANS), using microwave/radio activation pathway only, 37 of 172 sirens did not pass the test. The siren system was then configured to the normal configured (TCP/IP and microwave/radio activation pathways) and the siren system retested successfully following a silent test at approximately 1147 EST. The system is capable of being used to notify the public in an emergency. Prior to the full volume test today, a previous silent test using the radio/microwave pathway was successful. As a result of the 37 sirens that did not pass the test today, a press notice was provided. This courtesy notification is being provided under 10CFR50.72(b)(2)(xi).
"The condition was recorded in the IPEC corrective action program. The event remains under investigation."
The licensee notified the NRC Resident Inspector and FEMA. Additionally Westchester, Orange, Putnam, and Rockland counties were notified. |
| Power Reactor | Event Number: 45553 | Facility: POINT BEACH
Region: 3 State: WI
Unit: [1] [2] [ ]
RX Type: [1] W-2-LP,[2] W-2-LP
NRC Notified By: MARY SIPIORSKI
HQ OPS Officer: DAN LIVERMORE | Notification Date: 12/09/2009
Notification Time: 16:22 [ET]
Event Date: 12/09/2009
Event Time: 12:31 [CST]
Last Update Date: 12/09/2009 | Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
| Person (Organization):
MONTE PHILLIPS (R3DO)
|
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode | | 1 | N | Y | 100 | Power Operation | 100 | Power Operation | | 2 | N | Y | 100 | Power Operation | 100 | Power Operation | Event Text NOTIFICATION OF LOCAL LAW ENFORCEMENT DUE TO A SINGLE EMERGENCY SIREN ACTUATION
"At 1231 emergency siren P-007 located in the Mishicot, WI area inadvertently actuated. The siren covers 0.9% of total EPZ population. Severe weather, snow, ice and wind is occurring at this time.
"At 1340 siren actuation was verified and Manitowoc County Sheriff was notified of the sounding siren. At 1350, Point Beach performed a siren test, reset the siren and it is no longer alarming. Repair team has been dispatched to the siren location to troubleshoot and determine the cause of the actuation.
"The population coverage for siren P-007 is 0.9% and the siren malfunction is not reportable due to loss of population coverage. However, based on actuation and notification of the Manitowoc County Sheriffs Department, the event is reportable."
The NRC resident inspector has been notified. |
| Power Reactor | Event Number: 45554 | Facility: KEWAUNEE
Region: 3 State: WI
Unit: [1] [ ] [ ]
RX Type: [1] W-2-LP
NRC Notified By: CRAIG NEUSER
HQ OPS Officer: CHARLES TEAL | Notification Date: 12/09/2009
Notification Time: 16:48 [ET]
Event Date: 12/09/2009
Event Time: 12:31 [CST]
Last Update Date: 12/09/2009 | Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(xi) - OFFSITE NOTIFICATION
| Person (Organization):
MONTE PHILLIPS (R3DO)
|
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode | | 1 | N | Y | 100 | Power Operation | 100 | Power Operation | Event Text BLIZZARD RESULTS IN SPURIOUS ACTUATION OF EMERGENCY SIREN
"At 1231 CST on 12/09/2009 Emergency Siren P-007 located in Mishicot, WI area inadvertently actuated. This siren accounts for a population coverage of 2.3%. Therefore, the KPS (Kewaunee Power Station) emergency siren coverage remains acceptable with P-007 non-functional.
"Point Beach Nuclear Plant notified the Manitowoc County Sheriff department of the actuated siren [See EN# 45553]. At 1350 CST Point Beach performed a siren test and reset the siren. The siren is no longer alarming. A repair team has been sent to the siren location to determine the cause of the actuation."
The NRC resident inspector has been notified. |
| Power Reactor | Event Number: 45555 | Facility: QUAD CITIES
Region: 3 State: IL
Unit: [1] [2] [ ]
RX Type: [1] GE-3,[2] GE-3
NRC Notified By: CURT STEFFES
HQ OPS Officer: DAN LIVERMORE | Notification Date: 12/09/2009
Notification Time: 17:04 [ET]
Event Date: 12/09/2009
Event Time: 11:17 [CST]
Last Update Date: 12/09/2009 | Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(3)(xiii) - LOSS COMM/ASMT/RESPONSE
| Person (Organization):
MONTE PHILLIPS (R3DO)
|
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode | | 1 | N | Y | 100 | Power Operation | 100 | Power Operation | | 2 | N | Y | 100 | Power Operation | 100 | Power Operation | Event Text WINTER STORM POWER OUTAGES CAUSE ALERT SIREN INOPERABILITY
"On December 9, 2009, at 1117 hours, 27% of the alert sirens in the Quad Cities Station Emergency Planning Zone were determined to be inoperable for greater than 60 minutes. This is considered a major loss of the Quad Cities off site notification capability. The alert sirens were disabled due to power outages caused by a winter storm. Efforts are underway at the time of this notification to restore the sirens.
"This report is being made due to the reduction in public notification capabilities in accordance with 10CFR50.72(b)(3)(xiii).
"A follow-up notification will be provided when the sirens have been restored."
The licensee notified the NRC Resident Inspector. |
| Power Reactor | Event Number: 45556 | Facility: NORTH ANNA
Region: 2 State: VA
Unit: [1] [2] [ ]
RX Type: [1] W-3-LP,[2] W-3-LP
NRC Notified By: PAGE KEMP
HQ OPS Officer: HOWIE CROUCH | Notification Date: 12/09/2009
Notification Time: 17:15 [ET]
Event Date: 12/09/2009
Event Time: 14:23 [EST]
Last Update Date: 12/09/2009 | Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
| Person (Organization):
REBECCA NEASE (R2DO)
|
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode | | 1 | N | Y | 100 | Power Operation | 100 | Power Operation | | 2 | A/R | Y | 97 | Power Operation | 0 | Hot Standby | Event Text AUTOMATIC REACTOR TRIP ON UNIT 2 AND EDG START ON BOTH UNITS DUE TO INADVERTENT LOSS OF "C" RESERVE STATION SERVICE TRANSFORMER
"At 1423 hours on 12/9/2009, electrical supply breaker L102 was inadvertently opened which caused electrical Bus 3 and the 'C' Reserve Station Service Transformer to de-energize. This caused the loss of 'F' Transfer Bus which resulted in a loss of power to the 1H and 2J Emergency Busses and an automatic start of the 1H and the 2J Emergency Diesel Generators. Both emergency diesel generators started and re-energized their associated emergency bus as designed.
"The Unit 2 'G' Bus, which supplies power to the Unit 2 Circulating Water Pumps, did not automatically transfer to the 'B' Reserve Station Service Transformer in a sufficiently short time to prevent the loss of the Unit 2 Circulating Water pumps. The loss of the Unit 2 Circulating Water pumps resulted in an automatic low vacuum turbine trip and a subsequent [Unit 2] reactor trip due to the turbine trip.
"The 2 'G' Bus did automatically transfer to the 'B' Reserve Station Service Transformer and is currently energized. The Unit 2 Auxiliary Feedwater pumps automatically started and provided flow to the steam generators. There were no issues with the Auxiliary Feedwater System operation.
"The Unit 2 'A' Charging Pump and the Unit 2 'A' Component Cooling Water pump automatically started as designed due to the loss of power. The Unit 1 'B' Charging Pump and the Unit 1 'B' Component Cooling Water pump automatically started as designed due to the loss of power. The Unit 2 'C' Station Service Bus was lost following the trip when the electrical system automatically transferred to the Reserve Station Service transformers. With the 'C' Reserve Station Service Transformer de-energized the 'C' Station Service Bus was unable to transfer to an energized transformer. This resulted in the loss of the Unit 2 'C' Reactor Coolant Pump. The 'A' and 'B' Reactor Coolant Pumps remain in service at this time.
"The reactor trip is reportable per 10CFR50.72(b)(2)(iv)(B).
"The Auxiliary Feedwater system, Emergency Diesel Generator system, Charging system actuations are reportable per 10CFR50.72(b)(3)(iv)(A).
"The electrical system is being returned to a normal lineup. The condensate and feedwater system remained in service to provide flow to the steam generators. Steam Dump operation to the condenser is not available due to low condenser vacuum, therefore steam is being released to the atmosphere from the Steam Generator Power Operated Relief Valves."
The licensee suspects that switchyard maintenance activities caused the L102 trip which initiated the chain of events. All rods inserted into the core during the trip. During the transient, some secondary relief valves lifted and properly reseated. There is no known primary to secondary leakage. During the event call, the licensee reported that the 'C' Reserve Station Service Transformer was returned to service.
The licensee notified the NRC Resident Inspector and will be notifying the Louisa County Administrator. |
| Power Reactor | Event Number: 45557 | Facility: VOGTLE
Region: 2 State: GA
Unit: [1] [ ] [ ]
RX Type: [1] W-4-LP,[2] W-4-LP
NRC Notified By: KEITH POPE
HQ OPS Officer: DONALD NORWOOD | Notification Date: 12/10/2009
Notification Time: 01:38 [ET]
Event Date: 12/09/2009
Event Time: 23:10 [EST]
Last Update Date: 12/10/2009 | Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
| Person (Organization):
REBECCA NEASE (R2DO)
|
| Unit | SCRAM Code | RX CRIT | Initial PWR | Initial RX Mode | Current PWR | Current RX Mode | | 1 | M/R | Y | 24 | Power Operation | 0 | Hot Standby | Event Text MANUAL SCRAM FOLLOWING HIGH TURBINE VIBRATION
"At 2310 EST, Vogtle Unit 1 was manually tripped from 24% reactor power while the main turbine was rolling at 1800 rpm, preparing for synchronization to the grid.
"As Vogtle 1 was preparing to bring the Unit 1 generator on line following a forced outage, high vibration levels were experienced on the HP turbine bearings while the Turbine was at rated speed and synchronization preparations were in progress. The Turbine was manually tripped in accordance with plant procedures. Vibrations continued to increase as the Turbine began to coast down, warranting that vacuum be broken in accordance with procedures.
"The reactor was manually tripped in anticipation of trip of the main feedwater pump (due to loss of condenser vacuum) and condenser vacuum was broken to slow the turbine. When condenser vacuum was broken, the in-service Main Feedwater Pump auto tripped as expected, causing an automatic actuation of the Motor Driven Auxiliary Feedwater system.
"The cause of high vibrations on the Turbine is being investigated.
"All systems responded as expected on the trip."
All control rods fully inserted into the core following the reactor trip. Atmospheric relief valves are being used to remove decay heat. There is no known primary to secondary leakage. The plant is in a normal post-trip electrical line-up.
The licensee notified the NRC Resident Inspector. | |