ML19260D975

LER 80-002/03L-0:on 800107,refueling Water Tank Narrow Range Level Indicator Was in Alarm W/Low Level,But Instrument Did Not Indicate Alarm Conditions.Caused by Faulty Indicator Alarm light-emitting Diode.Diode Replaced

ML19260D975
Person / Time
Site:	Calvert Cliffs
Issue date:	02/07/1980
From:	Davis S, Rizzo P BALTIMORE GAS & ELECTRIC CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19260D972	List: ML19260D971 ML19260D975
References
LER-80-002-03L, NUDOCS 8002120689
Download: ML19260D975 (2)

Text

F k CONTROL BtOCx: 1 I I I I I p (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI 7

Cii 8 9 IM ID l c Ic lN l a l@l010 l- 10101010101.1010 LICENSEE CODE 14 15 . LICENSE NUMBER l@lh 25 2611 LICENSE 11 1111 TYPE JOl@l53 CATI 58 l@

CON'T O 1  % $ l.L_j@l0 ls lo lo in la l,19 68l@l0 69 l1lo 171810 l@l012101718 E% ENT CATE 74 75 REPORT CATE lo80l@

7 8 60 61 DOCKET NUM8ER EVENT DESCRIPTION AND PROB ABLE CONSECUENCES h O 2 lAt 1100 the operator noticed the refueling vater tank (RWT) narrev rance 1 0 3 level indicator was 'in alarm with a low level, but the instrunent did I g lnot indicate an alam condition. 't'he instru=ent was removed for re- 1 O s l calibration when it was reinstalled at 1500 it was indicating 1/2 I O 6 l inch below the midN1m level allowed by T.S. 3.5.h. The RWT vas filled I 9

0 7 lto greater than k00,000 gal. by 1515. The vide rance level indicator re-o a  !=ained operable is indicated greater than h00,000 gal during the event. l

• NOE #$0$E suCiEE CouPONENT CODE sue $"O:iE sSCEE LO ts.j i I I E l@ lxj@ lx l@ l 11 nlS IT IR lu l@ Ll_J@ LZ_l@ 20 7 8 9 10 11 12 13 18 19

_ SEQUENTIAL OCCURRENCE REPORT REVISION LER EVENT YEAR REPORT NO. CCOE TYPE N O.

@ ,ag/RO 18 10 I l-j i 01 01 al [d 10131 IL I l-1 LOJ 21 22 23 24 28 27 28 29 30 31 37 K A N ON NT ME HOURS S8 i FOR 8. SUPPL R

• MA UF RER lE 33 l@lZ 34

[@ 35 Z l@ lZ 36 l@ l0 1 01 0l 01 37 40 y@

41 lN 42 l@ I43A l@ ISl11815l@

• 44 47 CAUSE OESCRIPTION AND CORRECTIVE ACTIONS h i O lThe indicator alam circuit licht emitting diode (LED) vas faulty. I I

m IThis caused a lov level alarm to exist with noma) rance indication.

g lThe LED vas replaced. The indicator was checked for calibration and l g l dial response. No evidence of malfunction was found. Because-the l L' 1.4 I I apparent cause of this event was a failure of the indicator dial to I A  % POWER OTHER STATUS 01 O RY OlSCOV ERY DE?c'llPTION

@ Wh 111010 l@l irN/A 44 I l4s Al@l46 OPERATOR OBSERVATION 80 I

84 ig 12 RELEASED OF RELEASE AMOUNT'OF ACTIVITY LOCATION OF RELEASE l N/A I I N/A ,

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NuM8ER ITTil I n i n i n l@l2j@l nn rYPE DEsCRirTiON @ 1 . 0q5 i

,EPsON~EL iN;uks NUM8ER DESCRl9T10N 7

i a 8 9 inininl@l 41 12 N/A ,

80 I

LOS3 OF OR DAuACE TO FACILITY TYPE DESCRIPTION i 9 [ Z_j@l N/A 7 8. 9 10 80

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7 2 O 8 9 N@l N/A 10 l

68 69 llllllllIllIl} SG g NAME OF PREPARER

- PHON E: (301) 260 hoh2 {

_;- 8002120

LER 30. 80-2/3L DOCla:T NO. 50-318 EVENT DATE 1/7/80 REPORT DATE 2/7/80 ATTAC9 MENT EVENT DESCRIPTION AND PROBABLE CONSEQUENCES (CONTINUED)

This is not a repetitive occurrence.

CAUSE DES.:RIPTION AhD CORRECTIVE ACIIONS (CONTINUED) track properly, the instru=ent has been observed for recurrence of the problem since *2e event date. No problem has been noted. Therefore, no preventive action is deemed necessary.

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