ML17173A521

Forwards LER 79-002/01T-0

ML17173A521
Person / Time
Site:	Dresden
Issue date:	01/17/1979
From:	Stephenson B COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17173A523	List: ML17173A521 ML19256B185
References
79-49, NUDOCS 7901240211
Download: ML17173A521 (3)

Text

-Commonw9:h Edison **

Dresden Nuclear PoW(H Station.

R.R. #1 Morris, Illinois 60450 Telephone 815/942-2920 January 17. 1979, BBS Ltr. #79-49 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 #79-02/0lT-O, Docket #050~237 is hereby submitt_ed to your office in accordance with Dresden Nuclear Power Station Technical Specificaiion 6:6. B. 1. (e), failure or malfunction of one *or more components which prevents or could prevent, by itself, the fulfi,llment of the functional 'requirements of system('s) used to cope with a*ccidents analy2ed in the SAR.

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Station Superintendent Dresden Nuclear Power Station BBS/deb Enclosure cc: Director of Inspection & Enforcement.

Director o_f Management Information & Program Control File/NRC REGULATORY DOCKET FILE COPY 790124 a~t /

~ ,' ~~,~roR~ 3GG U.S. NUCLEAR REGULATORY COMMISSION

~ P* LICENSEE EVENT REPORT CONTROL BLOCK: .____.__ _..__.____._I_ _._l_l Q (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 6

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' f§JIJ I During normal. operation, HPCI turbine failed to start during quarterly flow test. .HPCII

' -_,. :ITJTI declared inoperable* and required ECCS surveHlances (T. S.

• 3. 5. C. 2) commenced, During CQID. later testing, HPCI operated successfully six consecutive times. HPCI .then declared *I DDIJ operable. Required surveillances except auto blowdown were completed satisfactorily. I

. *[)))) This is the first occurrence of this t e.

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SYSTEM CAUSE CAUSE COMP. VALVE .

. CODE CODE . SUBCODE . COMPONENT CODE SUBCODE SUBCODE

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! c~VENTYEAR ~EPIO~T,N~ TYPE

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• ATTACHMENT. . NPRD-4 PRIME COMP. COMPONENT

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44 . 47 CAUSE DESCRIPTION AND CORRECTIVE .C..CTIONS@

I During operation of th~ HPCI turbine on 1/4/79 the General Electri~ Technical rep-ITIQ I

I, Lresentative noted a misajustment of the interlock dump valve operating le~e-~;* The

• [I]}] I lever was adjusted and the HPCI pump started to verify proper operation. No

.. [JJJJ I additional action is planned.

'.'.' IJI1J 7 8 9 80 FACILITY ~ METHOD OF (.;':)\

STATUS  % POWER OTHER STATUS ~ : DISCOVERY DISCOVERY DESCRIPTION ~

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ATTACHMENT TO LICENSEE EVENT REPORT 79-02/0lT-0.

COMHONWEALTH EDISON COMPANY (CWE)

DRESDEN UNIT-2 (ILDRS-2) .

DOCKET llos0-237 . ~~** .

• ~* .

With the unit operating.at.steady load,* the HPCI turbine failed to start during performance of quarterly flow test surveillance DOS 2300-3. When the motor speed changer was run from t.he low speed stop to the high speed stop, *the turbine control valves did not open. As a result the HPCI system was declared inoperaqle and the required ECCS surveillances (T.S. 3.5.C.2) com-menced. At 1430 the HPCI surveillance was *performed again and the HPCLturbine started on the second* attempt. . Six. consecutive turbine startups were per-formed and the surveillance successfully completed. The HPCI system was dec.lared operable.* This event has minimal safety significance since the

.:, . *' required ECCS surveillances with the exception of auto blowdown were completed.

The auto blowdown surveillance was terminated when HPCI was declared operable.

On 1/4/79 *at 1100 the HPCI. turbine was operated with the General Electric Technical representative present. Henoted that the pin on the.motor

. I

• speed changer linkage which actuates the interlock dump valve when the

..*.. motor speed changer is on the low speed stop was not fully depressing tl:ie intei;-lock dump vp.lve operating "lever. The purpose of the interlock dump valve is to prevent the control. valves from. ope~ing !:Juring system*. startup with the-: turbine reset and the m.otor speed chang~r not on the low speed stop.

I

. I +he interlock. dump valve actuating lever was adjusted to provide full  ;

engagement arid HPCI pump and valve oper:ability surveillance DOS 23007""1 *

• .. " successfully performed at 1400. No further action is planned.

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