ML18024A920

LER 79-008/03L-0 on 790627:no Speed Indication Noted on Reactor Core Isolation Coolant.Caused by Broken Wires to Magnetic Pickup EG-M Box.Wires Repaired

ML18024A920
Person / Time
Site:	Browns Ferry
Issue date:	07/26/1979
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18024A919	List: ML18024A918 ML18024A920
References
LER-79-008-03L-01, LER-79-8-3L-1, NUDOCS 7908010393
Download: ML18024A920 (4)

Text

NBC FORM 366 U. S. NUCLEAR REGULATORY COfs'IMISSION I7 77)

CENSEE EVENT REPORT CONTROL BLOCKI L QI tPLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) e I 6 7

~ot 8 9 A L B R LICENSEE CODE F 3Q20 14 15 0 0 0 0 LICENSE NUMBER 0 0 0 0 25 Q34 2G 1 1 LICENSE TYPE 1 1 30 Q4~Os 57 CAT 58 CON'T

~Ot RE " ~LQB 0 5 0 0 0 2 9 6 Q7 0 6 2 7 7 9 QB 0 2 6 9 QB 7 8 60 61 DOCKET NUMBER 68 69 EVENT DATC 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10 During the running of RCIC monthl SI 4s5.F.l.d and the o erator noticed there was

~O3 no speed indication,'he SX was stopped until repairs were made and then the SI was satisfactorily completed, Technical Specification involved was T. S. 3.5.F.2. HPCI

~OG was available. The health and safety of the public were not affected. There have been

~OG no similar previous occurrences.

~O7

~OB 80 7 8 SYSTEM 'AUSE CAUSE COMP VALVE CODE CODE SUBCODE 'OMPONENTCODE SUBCODE SUBCODE

~EE Qll ~EQlg ~AQig E 1, E C 0 N Qls ~ZQ>> ~Z Qs 7 8 9 10 11 12 13 \8 19 20 SEQUENTIAL OCCURRENCE REPORT ~ REVISION Ol7 LER(AO essoer ACTION FUTURE EVENT YEAR

~79 21

'FFECT 22

~

23 SHUTDOWN

~00 24 REPORT No.

8 26

~~

27

~03 28 ATTACHhIENT CODE 29 NPRDA TYPE

~j, 30 PRIME COMP.

~

31 No.

~0 32 COMPONENT SUBMITTED MANUFACTURER

'4 TAKEN ACTION ON PLANT METHOD HOURS O22 FORM SUB. SUPPLIER LHOii 0 0 0 0 Y ~~Q24 ~~Qgs Z 9 9 9 Q18 ~iQ19 ~iQ20 Q23 Qgs .

33 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 o The wires which connected the ma netic icku to the EG-.M box had broken. This caused the tachometer to read zero. The wires were re aired and the SI corn leted.

3 e ~

4 7 8 9 80 FACILITY METHOD OF STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION Q32

[11~] C Qs ~04 3 Qgg NA 44

~BQs> Operator observation 80 7 8 9 10 12 13 45 46 ACTIVITY CONTENT RELEASED OF RELEASE AhIOUNT OF ACTIVITY LOCATION OF RELEASE s ~ZQgg Z NA NA g4 80 7 8 9 10 11 44 45 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION 8

~00 OlOgg 12 1 Qgs 13 NA 80 7 9 11 PERSONNEL INJUB IF S NUMBER DESCRIPTION 41

~00 0 Oso NA 80 7 8 9 11 12 LOSS OF OA DAMAGE To FACILITY TYPE DESCAIPTION Z Osg NA 7.9.0 8.010 8 9 10 80 NRC USE ONLY

~~'<<NAQ PUBLICITY DESCRIPTION O

68 G9 80 ss g

j 7 8 10 0

NAME OF PREPARER PI)ONE: 0

4o Tennessee Valley Authorit ~ Foun BF-17 Brp~vgs Ferry Nuclear Pla BF 15.2 1/10/79 LER SUPPLEMENTAL INFORMATION BFRO 50 296

/ 7908 Technical Specification Involved 3.5.F.2 Reported Under Technical Specification 6,7,2,b,2 Date of Occurrence I ~" 9 Time of Occurrence Unit .

Identification and Descri tion'of Occurrence:

During the running of the RCIC monthly SI 4,5,F,l.d and e, the operator noticed that there was no speed indication, Conditions Prior to Occurrence:

The unit vas starting up from an outage and was at 43%,

Action specified in the Technical Specification Surveillance Requirements met due to ino erable e ui ment. Describe.

The SX was stopped and an urgent TR was written to Electrical Maintenance. 'he SX vas then completed after repairs were made, parent Cause of Occurrence:

The vires which connected the magnetic pickup to the EG~M box had broken, This caused the tachometer to read zero, Anal sis of Occurrence:

There vas no speed indication due to the wires being broken at the magnetic pickup, Corrective Action:

The broken vires were repaired, Failure Data:

NA

+Retention: eriod - Lifetime; Responsibility - Administrative Supervisor

<:Revision:

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