ML19256G043

LER 79-093/03L-0:on 791120,during Startup,Rod 42-33 Gave Overtravel Alarm at Notch 48.Apparently Caused by Loose Inner Filter on Drive.Rods Will Only Be Pulled to Notch 46 Until Drive Unit Overhaul During 1980 Refueling Outage

ML19256G043
Person / Time
Site:	Brunswick
Issue date:	12/07/1979
From:	Tollison A CAROLINA POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19256G034	List: ML19256G033 ML19256G043
References
LER-79-093-03L-01, LER-79-93-3L-1, NUDOCS 7912270301
Download: ML19256G043 (1)

Text

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i EVENT DESCFiPTION AND PAOBA8LE CONSEQUENCES h g lDuring a normal reactor startup, rod 42-33 gave a " Rod Overtravel" alarm when with-I 9

drawn to notch 48. ,

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, rote o II I o 7 I l Technical Specifications 3.1.3.6, 6.9.1.9b '

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35 I z l@ ,101010101 INi@ lyl@ INi@ Icl0l810lr 36 31 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 1 o l Both rods were successfully recounlea. The inner filter on the drive is believed to I L' L'.J l be loose and eneaeine the uncouoline rod. uncouoline the blade from the drive unit.

g l This oniv occurs when the rod is withdrawn to the " Full Out" position. These two  ;

i 3 l rods, along with the reOuired syr: metrical rods, will only be pulled to positien 46  ;

E I until the 1980 refueline outace, when the drive units will be overhauled. l 7 8 9 80 F ACILITY METHOO OF STATUS  % POWER OTHER STATUS DISCOVERY OlSCOVERY DESCRIPTION l.'

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N/A l IAl@l Operator Surveillance l AETivity CCOTENT '8 "

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. . . >t s.cor t ion '"' i EED Ld-ei81 N/A l llllllll1l ll l I 8 9 10 68 69 30 p A. E Toll hon. 3r- 919 - 457-9521 PHONE:

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