PNO-III-06-013, Palisades Shutdown to Investigate Control Rod Withdrawal Problem: Difference between revisions

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{{#Wiki_filter:PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-III-06-013This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or publicinterest significance. The information is as initially received without verification or evaluation, andis basically all that is known by the Region III staff on this date.FacilityPalisades Nuclear PlantNuclear Management Co.
{{#Wiki_filter:PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-III-06-013 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region III staff on this date.
Covert, MI Docket: 50-255License: DPR-20Licensee Emergency Classification Notification of Unusual Event Alert      Site Area Emergency General Emergency x   Not Applicable
Facility                                            Licensee Emergency Classification Palisades Nuclear Plant                                  Notification of Unusual Event Nuclear Management Co.                                   Alert Covert, MI                                               Site Area Emergency Docket: 50-255                                          General Emergency License: DPR-20                                      x Not Applicable


==SUBJECT:==
==SUBJECT:==
SHUTDOWN TO INVESTIGATE CONTROL ROD WITHDRAWAL PROBLEMDESCRIPTION:On May 11, 2006, the plant staff determined that one control rod remained fully inserted in thereactor core during startup following a refueling outage. The condition was identified throughmonitoring incore power levels (neutron flux) while the reactor was at 24 percent power. Control rod position indication had showed the control rod to be in its normal, withdrawn position, but the licensee believes that the control rod may be decoupled from the control roddrive mechanism which moves the rod.The reactor was shut down to investigate and correct the apparent failure of the control rod tobe withdrawn during startup. The resident inspectors will monitor the licensee's activities.Operators manually tripped the reactor from 8 percent power at 3:14 p.m. EDT onMay 11, 2006. All systems functioned normally during the shutdown.The State of Michigan will be informed of the shutdown. The information in this preliminarynotification has been reviewed with licensee management.The licensee notified the NRC Operations Center of the shutdown at 5:35 p.m. EDT onMay 11, 2006. This information is current as of 10 a.m. EDT on May 12, 2006.CONTACTS:Frances RamirezChristine Lipa630/829-9607630/829-9619}}
SHUTDOWN TO INVESTIGATE CONTROL ROD WITHDRAWAL PROBLEM DESCRIPTION:
On May 11, 2006, the plant staff determined that one control rod remained fully inserted in the reactor core during startup following a refueling outage. The condition was identified through monitoring incore power levels (neutron flux) while the reactor was at 24 percent power.
Control rod position indication had showed the control rod to be in its normal, withdrawn position, but the licensee believes that the control rod may be decoupled from the control rod drive mechanism which moves the rod.
The reactor was shut down to investigate and correct the apparent failure of the control rod to be withdrawn during startup. The resident inspectors will monitor the licensees activities.
Operators manually tripped the reactor from 8 percent power at 3:14 p.m. EDT on May 11, 2006. All systems functioned normally during the shutdown.
The State of Michigan will be informed of the shutdown. The information in this preliminary notification has been reviewed with licensee management.
The licensee notified the NRC Operations Center of the shutdown at 5:35 p.m. EDT on May 11, 2006. This information is current as of 10 a.m. EDT on May 12, 2006.
CONTACTS:
Frances Ramirez                Christine Lipa 630/829-9607                    630/829-9619}}


{{PNO-Nav|region=III}}
{{PNO-Nav|region=III}}

Latest revision as of 19:39, 23 November 2019

PNO-III-06-013: Palisades Shutdown to Investigate Control Rod Withdrawal Problem
ML061320329
Person / Time
Site: Palisades Entergy icon.png
Issue date: 05/11/2006
From: Christine Lipa, Ramirez F
NRC/RGN-III
To:
Nuclear Management Co
References
PNO-III-06-013
Download: ML061320329 (1)
v • d • e


PRELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE -- PNO-III-06-013 This preliminary notification constitutes EARLY notice of events of POSSIBLE safety or public interest significance. The information is as initially received without verification or evaluation, and is basically all that is known by the Region III staff on this date.

Facility Licensee Emergency Classification Palisades Nuclear Plant Notification of Unusual Event Nuclear Management Co. Alert Covert, MI Site Area Emergency Docket: 50-255 General Emergency License: DPR-20 x Not Applicable

SUBJECT:

SHUTDOWN TO INVESTIGATE CONTROL ROD WITHDRAWAL PROBLEM DESCRIPTION:

On May 11, 2006, the plant staff determined that one control rod remained fully inserted in the reactor core during startup following a refueling outage. The condition was identified through monitoring incore power levels (neutron flux) while the reactor was at 24 percent power.

Control rod position indication had showed the control rod to be in its normal, withdrawn position, but the licensee believes that the control rod may be decoupled from the control rod drive mechanism which moves the rod.

The reactor was shut down to investigate and correct the apparent failure of the control rod to be withdrawn during startup. The resident inspectors will monitor the licensees activities.

Operators manually tripped the reactor from 8 percent power at 3:14 p.m. EDT on May 11, 2006. All systems functioned normally during the shutdown.

The State of Michigan will be informed of the shutdown. The information in this preliminary notification has been reviewed with licensee management.

The licensee notified the NRC Operations Center of the shutdown at 5:35 p.m. EDT on May 11, 2006. This information is current as of 10 a.m. EDT on May 12, 2006.

CONTACTS:

Frances Ramirez Christine Lipa 630/829-9607 630/829-9619

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