05000255/LER-1978-043-01, /01T-0 on 781231:during Control Rod Drive Mechanism Exercising,Rod 29 Was Driven Too Far,Resulting in Misalignment Greater than 8 Inches from Remaining Rods in Group.Caused by Diversion of Operators Attention

/01T-0 on 781231:during Control Rod Drive Mechanism Exercising,Rod 29 Was Driven Too Far,Resulting in Misalignment Greater than 8 Inches from Remaining Rods in Group.Caused by Diversion of Operators Attention

ML18043A421
Person / Time
Site:	Palisades
Issue date:	01/16/1979
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML18043A420	List: 05000255/LER-1978-043, Forwards LER 78-043/01T-0 05000255/LER-1978-043-01, /01T-0 on 781231:during Control Rod Drive Mechanism Exercising,Rod 29 Was Driven Too Far,Resulting in Misalignment Greater than 8 Inches from Remaining Rods in Group.Caused by Diversion of Operators Attention
References
LER-78-043-01T, LER-78-43-1T, NUDOCS 7901190110
Download: ML18043A421 (1)

LER-1978-043, /01T-0 on 781231:during Control Rod Drive Mechanism Exercising,Rod 29 Was Driven Too Far,Resulting in Misalignment Greater than 8 Inches from Remaining Rods in Group.Caused by Diversion of Operators Attention

Event date:
Report date:
2551978043R01 - NRC Website

text

Palisades NRC FORM366 11-n1 U. S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK: I I. I I r,"'I.

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L.ICENSEE CODE 14

,5 L.ICENSE NUMBER 25 26 L.ICENSE TYPE JO 57 CAT 58 CON'T IIITJ 7

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[)))) I During CRDM exercising, control rod No. 29 was driven too far, resulting

[)))) 1 in a misalignment of greater than 8 inches from the remaining rods in its

!Im group.

This misalignment exceeds the limit of T.S. 3.10.4, and is report-I

[]JI] I able per Special TS S-5.1.

Misalignment existed only briefly (e.g., severf1 seconds).

No threat to public heatlh or safety existed.

Occurrence

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((1Ij I discovered during record review on 1-2-79.

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SYSTEM

CAUSE

CAUSE COMP.

VAL.VE CODE CODE SUBCOOE COMPONENT CODE SUSCOOE.

SUBCOOE 1R1B1@ w@ w@ 1c101N1R101n1e ~ ~@

9 10 11 12 13 18 19 20 SEQUENTIAL.

OCCURRENCE REPORT L.ERIRO LVENTY..fAR REPOP,TNO.

CODE TYPE REPORT 17 I~ I I

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1.....-1 10 11 I L!.J I I NUMBER

. 21 22 23 24 26 27 28 29 30 31 ACTION FUTURE.

EFFECT SHUTDOWN

~ ATTACHMENT NPR~

PRIME COMP.

TAKEN ACTION ON PLANT METHOD HOURS 22 SUBMITTED FORM SUB.

SUPPLIER U!.l@W@ W ~ 10 Io I 01 I 1!.J@

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REVISION NO.

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32

.COMPONENT 80 MANUFACTURER

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44 47 [J))J I This occurrence resulted from the operator's attention having been diverte1

!Im from the control rod position by other alarms received coincident with, IIIIl but not related to the CRDM exercising.

This occurrence has been reviewed!

lIIIl I with the individual _concerned and the significance* of the Tech Spec*

III!} I limit was emphasized.

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9 FACIL.ITY

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STATUS

% POWER OTHER STATUS \\.::;:I [ill] ~ 111 or 9@1.__N_/_A _____,

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9 10 12 13 44 ACTIVITY CONTENT

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REL.EASED OF RELEASE I

AMOUNT OF ACTIVITY ~

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9 10 11 PERSONNEL. EXPOSURES

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11 12 13 PERSONNEL. INJURIES

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NUMBER OESCRIPTIONl.!!J ITTIJ I g 01 Ol(§)~N~/_A _________________________

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. L.OSS O~ OR DAMAGE TO FACI L.ITY @3 TY'Z OE~Cl)~TION ITJII L::J@)!-=--~-'------------.....,.----------------J 7

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10 PUBL.ICITY

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ISSUEOt,;::;\\ DESCRIPTION~

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