ML17252B527

LER 81-023/03L-0 for Dresden, Unit 2 Re While Running HPCI Pump Test, the Operator Observed Torus Wide Range Level Instrument Reading 0 Inches and Narrow Range Level Instrument Reading, About - 2 Inches and Oscillating

ML17252B527
Person / Time
Site:	Dresden
Issue date:	06/03/1981
From:	Scott D Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
DJS LTR 81-454 LER 81-023/03L-0
Download: ML17252B527 (4)

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• • Dresden Nuclear Power Station R.R. #1 Morris, Illinois 60450

. Telephone 815/942-2920 June 3, 1981 DJS LTR 1181-454 James G. Keppler, Regional Director

-Directorate of Regulatory Operations Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL. 60137 Reportable Occurrence Report #81-23/031-0, D_ocket 11050-237 is being submitted to your office *in accordance with Dresden Nuclear Power Station Technical Specification 6.6.B.2.(b), conditions leading to operation in a degraded mode permitted by a limiting condition for operation or plant shutdown required by a limiting condition for operation.

fJ)Jc,otJ D. J. Scott Station Superintendent Dresden Nuclear Power Station DJS:lg Enclosure cc: Director of Inspection & Enforcement Director of Management Information & Program Control U.S. NRC, Document Mgt. Branch File/NRC

• * * - - - - - - - - - - - - * - - - -*-*- -------U:..5..NUCLEAR REGULATORY COMMISSION ........ ---**

-CENSEE EVENT REPORT -

I CONT'ROL BLOCK: I 1~~

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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• 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION ANO PROBABLE CONSEQUENCES @ . * .

[))jJ I While running Hi?CI pump test, the operator observed torus wide range level instrument CEJ:IJ I reading 0 inches and narrow* range level instrument reading, about - 2 inches and osci-

. ITITI 1 Hating *. Torus maximum water volume (T.S.3.7.A.l) is 115,665 cu. ft. (-1.5 in) and was

[§JI] I exceeded by .about 1400 cu. ft (1. 5 in.).. Since the limit was exceeded by about one per

((ID I cent, this event has minimal safety significance. Similar Event was reported by LER I ...

50-237/78-5)

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CAUSE DESCRIPTION ANO CORRECTIVE ACTIONS METHOO Lzl J701010 I HOURS SUBMITTED j l~I@ ~2NI@) W FORM ::iUB. SUPPLIER 43 MANUFACTURER I z I 91 9 I 47""

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o::::I[J I The cause of the problem was the operator allowed torus water level to get too high

!ITIJ I during HPCI test. The HPCI turbine was secured and the torus pumped to the hotwell to a1 D:m 1 1evel of - 4 in. by.wide level instrument range indication. Operator retraining

[IIIJ I sessions are reviewing procedural requirements. No further action deemed necessary.

o:m 7 8 9 80 FACILITY STATUS  % POWER OTHER STATUS f:iO\

\:;:J METHOOOF DISCOVERY DISCOVERY DESCRIPTION ~

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NUMBER A TYPE DESCRIPTION~

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8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIPTION t4J'

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815~942-2920 Eit. 422 _2 I

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DEVIATION REPORT

,* .. ~

i DVR NO.

Commonwealth Edison STA UNIT YEAR NO.

D 2 40

~TITLE OF DEVIATION OCCURRED Water High Level Greater Than - l~ In. 5Li1/81 0000

.DATE TIME SYSTEM AFFECTED 1600 PLANT CONDITIONS TESTING Primary Containment Run -:::: 250 0 CXJ CJ MODE PWR (MWT) . LOAD(MWE). YES .NO DESCRIPTION OF EVENT While running HPCI sump test, operator observed torus wide range level instrument reading 0 inches.

Narrow range level instrument was re.ading approximately 2 inches and oscillating.

DESCRIPTION OF CAUSE Due to problems with HPCI System, HPCI turbine was run for.an extended period of time, causing water level in torus to increase.

• otHER APPLICABLE INFORMATION HPCI turbine secured and torus was pumped to hotwell. Final wide range torus level was-4 inches.

Final local sight glass level was - 3~ inches.* Final narrow range level was - 6 inches. A (OVER)

EQUIPMENT DYES DR NO. WR NO. Robert A. Mitzel 5/11/81 FAILURE [iJ NO N/A RESPONSIBLE SUPERVISOR _DATE PART 2 I OPERATING ENGINEERS COMMENTS Torus water level within Tech. Spec. limits at start of HPCI pump test (DOS 2300-3).

SAFETY-

.TYPE OF DEVIATION* EVENT OF POTENTIAL TECH SPEC NON-REPORTABLE ANNUAL RELATED REPORTABLE OCCURRENCE PUBLIC INTEREST VIOLATION OCCURRENCE REPORTING WR ISSUED D 14 DAY D 10CFR21 YES [i] YES D 0 JO DAY NOTIFICATION 6.6.B.2.b D ' D D NO D NO []

REPORTABLE CCCURRENCE ACTION ITEM NO. PROMPT ON-SITE NOTIFICATION NUMBER R. M. Ragan 5/18/81 TITLE DATE TIME

~ 81-2J/03J:;-0 TITLE DATE TIME 24-HOUR NRC NOTIFICATION PROMPT OFF-SITE NOTIFICATION DTPH N/A F. A. Palmer 5/18/81 3:36 REGION I I I DATE TIME TITLE DATE TIME N/A DTGM REGION 111 & DOL CATE TIME TITLE DATE TIME RESPONSIBLE COMPANY OFFICER INFORMED OF 10CFR21 CONQITIONS AND THEIR REPORT TO NBC TITLE DATE TIME REVIEW AND COMPLETED -John W. Wujci\a .. .5/18/81

. OPERATING ~GINEER DATE ACCEPTANCE BY STATION REVIEW AS REOU I RED DATE RESOLUTION APPROVED AND AUTHORIZED FOR DISTRIBUTION 86-517' 10-77 (FORM 15-52-~)

~c.

OTHER APPLICABLE INFORMATION A Work Request was written to calibrate narrow range instrument.

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