ML20217A477

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PNO-78-197:on 781128,plant Was Shutdown to Correct Excessive CRDM Seal Leakage.Most Seals Installed During Refueling Outage Have Been Replaced & Remaining 24 Will Be Replaced During Current Outage.State of Mi Notified
ML20217A477
Person / Time
Site: Palisades Entergy icon.png
Issue date: 11/30/1978
From: Klingler G, Nolan F
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:
References
PNO-78-197, NUDOCS 9804220269
Download: ML20217A477 (1)


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,r PRELIMINARY NOTIFICATION q November 30, 1978 s

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, P'ELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PNO This preliminary notification constitutes EARLY notice of event of POSSIBLE safety or public interest significance. The information presented is as initially received without verification or evaluation and is basically all that is known by IE staff on this date.

Facility: Consumers Power Company, Palisades Covert,111 (DN 50-255) )

Subject:

CONTROL R0D DRIVE SEAL LEAKAGE .

The Palisades Nuclear Plant was shutdown on November 28, 1978 to correct excessive control rod drive mechanism (CRDM) seal leakage. This is the ninth forced outage to correct excessive CRDM seal leakage since the last refueling. During that refueling outage (January 6,1978 - April 20, 1978) preventive maintenance was performed on all 45 CRDM's including replacement of the seals. The licensee is investigating the cause  :

of the leakage and believes it to be a metallurgy problem associated  !

with the seal material. Most of the seals installed during the refueling '

outage have been replaced and the remaining 24 will be replaced during iss the current outage. The unit is expected to be down for twelve days. ~~

fiegion III (Chicago) is following the problem.' Two RIII inspectors are

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at the site. The licensee has informed news media of the plant outage. l The state of Michigan has been informed.  :,

Region III received notification of the plant shutdown by telephone '

from our inspector at the site at 5:30 p.m. EST on November 29, 1978.

Contact:

GKlingler, IE x28019 FNolan, IE x28019  !

l Distribution: Transmitted H St # /2d l Chairman Hendrie Commissioner Bradford S. J. Chilk, SECY I Commissioner Kennedy Commissioner Ahearne C. C. Kammerer, CA Commissioner Gilinsky (For Distribution)

! Transmitted: MNBB ///27 P. Bldg (l2 7 J. G. Davis IE L. V. Gossick, ED0 ' H. R. Denton, NRR Region M 4/ M 2-S. H. Hanauer, EDO R. C. DeYoung, NRR J. J. Fouchard, PA R. J. Mattson, NRR N. M. Haller, MPA V. Stello, NRR (MAIL) ,

R. G. Ryan, OSP R. S. Boyd, NRR J. J. Cummings, DIA H. K. Shapar, ELD ' SS Bldg /,l.' 2 9 R. Minogue, SD C. V. Smith, NMSS PRELIMINARY NOTIFICATION /

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DFat 9804220269 781130 PDR I&E

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