05000237/LER-1979-008, Forwards LER 79-008/03L-0

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Forwards LER 79-008/03L-0
ML17173A613
Person / Time
Site: Dresden 
Issue date: 02/09/1979
From: Stephenson B
COMMONWEALTH EDISON CO.
To: Keppler Jr
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17173A614 List:
References
79-135, NUDOCS 7902220011
Download: ML17173A613 (3)
v • d • e


LER-1979-008, Forwards LER 79-008/03L-0
Event date:
Report date:
2371979008R00 - NRC Website
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text

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Commonwealth Edison

> oresden Nuclear Power Station

. ii R.R. #1 i.. :... '.... '/ Morris, Illinois 60450

~*"*'-"""'--Ielephone_815/.9!12,2920. _______________________________ _

February 9, 1979 BBS LTR # ~9-135 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 //79-8/031-0, Docket #050-237 is hereby 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 re-quired by a limiting condition for operation.

BBS:lcg Enclosure B.B. Stephenson Station Superintendent Dresden Nuclear Power Station cc:

Director of Inspection & Enforcement

. 7 9 0 2 2 2 0 0/ (

Director of Management Information & Program Control File/NRC

1.J nC1-""01'+ ::t2~

l7*nl""

LlCE.NSEE EVENT REPOP.T

.NUCLEAH REGULATOHY CUM.v11:;s10*~

SON TROL G LOC1':: r,_j _..____*..._l _..___! *__,_...._\\ __,! Q

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1 6

(PLEASE PRINT OR.TYPE ALL REQUIRED INFORMATION)

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9 LICE.\\JSSE CODE 14

5 LIC!ONSE NU~IUER 25 26 LICENSE TYPE JO 57 CAT 58 CON'T

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7 8

~~~~~ ~©I o I s I o 1 o 1 o I 2 I 3 I 1 101. o I 1 1 2 ! 6 I 7 I 9 !G) I o I 2 I o I 9 I 1 I 9 I G)

GO 61 DOCKET NU\\IBER GS 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

I During steady state operation, the LPCI system minimum flow valve M0-2-1501-ll'.3.Ai failed to close completely while performing the *LPCI pump operability surveillance (DOS 1500-6).

The valve was closing when the breaker tripped.

The valve automati-I cally closes.when sufficient flow is sensed in the LPCI pump discharge header.

Safety significance was minimal since remaining 3 LPCI pumps were available to meet I

~

I the required system flow.

No previous similar occurrences.

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7 8

9 SYSTE~.1 C,>.oJSE C,>.USE CODE CODE SUSCODE I S! Fl@ LU@ ~J@ 1z I 9

10 11 12 13 SEQL*ENTIAL

@ LER'RO LVENT YEP.A REPORT NO.

REPORT I 71 91 L::::J 10 I 01 81

  • NUMBER 21 22 23 24 2G COMPONENT CODE ZI ZI ZI ZI z1@

18 OCCURRENCE CODE 1...---1 I 01 31 27 28 29 CO\\:?.

SUB CODE

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19 REPORT TYPE L.!'.J 30 VAL\\'E SU BC ODE w@

20 REVISION NO.

L=l lQJ 31 32 ACTION FUTURE EFFECT SHUTDOWN Q

  • ATTACHMENT NPRD*4 PRIME CCMP.

SUPPLIER COMPONENT MANUFACTURER 80 TAKEN ACTION ON ?L,>.NT METHOD HOURS ~ SUBMITTED FQR.\\1 :;us.

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LzJ@

Lll.1 01 01 01 01 Ll!J@

LBJ@)

33 34 35 36 37 40 41 42 Ul@

I zl 91 91 91@)

CAUSE CE:SCRIPTION AND CORRECTIVE ACTICNS @

43

  • 44 47 The cause of the failure is unknown.

The valve operator motor and the thermal ove:.:..J OJJJ I load contacts were checked with no anomalies found.

The breaker was reset and the valve was successfully cycled three times from the control room.

While cycling, electrical maintenance checked the amperage of the motor and found it satisfactcrry.

ITm No further corrective action is planned.

8 9

FACILITY STATUS

% POWER OTHER STATUS @

METHOD OF

~

80

~Li@

10 18 17 l@)l.__ __ N_A ______ ~

DISCOVERY DISCOVERY DESCRIPTION '231

~~~l~~~S_u_r_v_e_1_*_1_1_an~c_e_*~T_e_s_t_i_n_g ___

  • -~~----'

8 0

ACTIVITY 10 12 11 CON TENT

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44 P.ELSASED o;: REL::,>.SE AMOU~.JT OF ACTIVITY

~

~@

~@.__I ____

NA ___

7 ij 9

10 11 44 45 46 80 LOCATION OF RELEASE NA 45 80 80 80 NRC USE ONLY

DEVIATION REPORT *

  • /

DVR NO.

~commonwealth Edison.

STA UNIT YEAR NO; o* 2 12 PART 1/ Tl TLE OF DEVIATION OCCURRED

~1-T6=r9--o-152--c=

Flow Vlv Brkr Trip LPCI Min DATE TIME*

SYSTEM AFFECTED 1500

PLANT CONDITIONS

TES*Ti i-..!G LPCI Run 2208 725

!XJ CJ MODE PWR (MWT)

LOAD(MWE)

YES NO DESCRIPTION OF. EVENT While conducting LPCI pump'operability surveillance DOS 1500-6, the LPCI min flow vlv. breaker tripped when the vlv.. was attempting to close.

DESCRIPTION OF C.~USE Un kl). own OTHER APPLICABLE INFORMATION (2-1501-13A)

Breaker reset; vlv was exercised three times successfully DR NO.

T. A. Ciesla EQUl.PMENT [iJ YES FAILURE ONO NA WR NO.

719

.*. RESPQ_NSIBLE SUP!'RVISOR PART 2 I OPERATING ENGINEERS COMMENTS

_:Redundant< LP CL.pumps_ available to meet reduced system flow.

TYPE OF DEVIATION REPORTABLE OCCURRENCE.

EVENT OF POTENTIAL PUBLIC INTEREST TECH SPEC VIOLATION NON-REPORTABLE OCCURRENCE ANNUAL REPORT I NG

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1-26-79 DATE

.SAFETY-

. RELATED WR ISSUED

. YES iXl

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9:55 AM

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'9: 55 AM

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