Headquarters Daily Report
FEBRUARY 25, 2000
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REPORT NEGATIVE NO INPUT
ATTACHED INPUT RECEIVED RECEIVED
HEADQUARTERS X
REGION I X
REGION II X
REGION III X
REGION IV X
PRIORITY ATTENTION REQUIRED MORNING REPORT - REGION III FEB. 25, 2000
Licensee/Facility: Notification:
Consumers Power Co. MR Number: 3-00-0010
Palisades 1 Date: 02/15/00
Covert,Michigan
Dockets: 50-255
PWR/CE
Subject: PALISADES SHUTDOWN FOR PLANNED MAINTENANCE OUTAGE-UPDATE ON PNO-
III-00-003
Discussion:
This morning report is being issued to update the subject PNO. The steam
generators and appropriate portions of the secondary plant were flushed
to reduce elevated sodium concentrations to acceptable levels.
Inspections of the A steam generator identified that an internal manway
cover had come loose and was the cause of the water carryover problem.
The manway cover and its associated clamp were modified and the cover was
reinstalled. Also, Primary Coolant Pump P-50B shaft seal was successfully
replaced. In addition, the alternate steam supply to the turbine driven
auxiliary feedwater pump leak was appropriately addressed and the
alternate steam supply line was subsequently isolated. An NOED was
requested from and granted by NRR for operation with the alternate steam
line out-of-service.
During subsequent plant startup activities, the licensee identified
leakage from a control rod drive (CRD) mechanism seal assembly. The
leakage was above what is normally seen in operations but well below
Technical Specifications. The licensee placed the plant in cold shutdown
to further investigate the leakage and to repair the CRD seal assembly.
Licensee personnel identified that this CRD seal assembly and one other
seal assembly, repaired earlier in the outage for leakage, were both part
of a group of seven assemblies with similar histories. Subsequently, a
root cause investigation team was formed which included industry
consultants. Currently, the licensee has disassembled all seven
assemblies plus one additional assembly in an effort to identify a common
cause. As of February 24 no common cause has been identified.
Regional Action:
Licensee activites are being monitored by the resident inspectors with
assistance from regional specialists.
Contact: MICHAEL JORDAN (630)829-9637
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