ML19254F515

LER 79-114/03L-0:on 791015,pump Suction from Suppression Chamber Valve 2E41-F041 Failed to Open When Initiated from Control Switch.Caused by Failure of Motor Winding.Direct Cause Not Known

ML19254F515
Person / Time
Site:	Hatch
Issue date:	11/02/1979
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19254F514	List: ML19254F513 ML19254F515
References
LER-79-114-03L, LER-79-114-3L, NUDOCS 7911090565
Download: ML19254F515 (2)

Text

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'7 77) U.S. NUCLEAR REGULATORY COMMISSION

,- LICENSEE EVENT REPORT . ,

CONTROL 3LOCIC: l i

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lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

o 1 8 9 l Gl Al El IlCODE LICENSEE Hl 2 14l@l150 l 0 l 0 l 0 LICENSE l0l0 l 0 l 0 l0 l0 40 NUMBER 25 l@l4 26 l1 [1 l1 l1 l@l57 CAT LICENSE TYPE- JO l

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@l75 1l REPORT 1l 0lDATE2l 7l 9S0l@

EVENT DESCRIPTION AND PRO 8ADCE CONSEQUENCES h ,

io 2 l With the reactor =in the run mode, while performing procedure HNP-2-3302.(HPCI Valve - ]

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,a 3 l Operability, the 2E41-F041 (Pump suction from the Suppression Chamber Valve) failed l o 4 l to open when initiated from the Control Switch. The falve operability test was being l

,o s [ performed in preparation for making HPCI operable following Maintenance of the l o s I system. This is a repetitive occurrence as reported on LER 79-086. Public health andl l0 7 I safety were not affected by this incident.

I eoa l I 7 8 9 80 E CODE $ BC E COM*0N ENT COO" SUBCOO'E S E

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9 10 11 12 I3 18 19 20 SEOUENTIAL OCCURRENCE REPORT REVISION

,_ EVENT YEAR REPORT No. CODE TYPE No.

h "LER/R0 E n uU E l 7l 9l [ -j 1 1 4 l0l3l l30Ll [--_j ] f

_ 21 22 23 24 26 27 28 ?J 31 32 K AC ON ON PLAN T h* O HOURS S8 11 FORA S. SU PLIE MAN FACT RER lAl@

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44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h

_l i j o j l The cause of the 2E41-F041 valve failure was a failure of the motor winding. The l  !

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,i i direct cause of failure is not known at this time. The problem is ur der investiention.1 *

, 7 [ It is theorized that motor failure could be attributed to moisture or high humidity. I i 3 l The Architect Engineer provided a design change package which would provide for a con- (

i 4 l tinuous current saturation of winding so as to keep motor internals free from (cont) 1 7 g 9 80 STA S  % POWER oTHER STATUS I , RY DISCOVERY DESCRIPTION l1 5 W @ l0l9l3l@l NA l [B_j@! Surveillance testing I ACTIVITY TENT RELE ASED of RELE ASE AMOUNT OP ACTIVITY 7

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@l NA l l NA LOCATION OF RE LE ASE l

Ii 44 45 80 PERSONNEL EXPOSURES NUMBE R TYPE DESCRIP TION 39

.I l3 7 l0 l0 l0 l@[_Zj@l NA

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PERSONNE L INJURIES e.

1 n NUMBER l0 l0 l0 l@l DESCRIPTION NA

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l r as is i2 so LOSS oF OR DAMAGE To FACILITY TYPE DESCRIP TION li 7

os 9d @lto NA 7911090 l PUBLICITY 80 ISSUE D DESCHi8 TION NRC USE ONLY

• 12 l o l [N_j@l NA l llIIllllllll!*a, 7 8 9 to 68 69 . 80 S NAME OF PREPAnED FHONE: 912-367- m l {

s k A Georgia Power Company Plant E. I. llatch '

Baxley, Georgia 31513 Reportable Occurrence Report No. 50-366/1979-114 Cause Description and Corrective Action (cont) moisture. Procedures have been reviewed to determine the number of operations during surveillance and time limit of motor operation. Test equipment has been installed in the circuit to monitor future valve cycles in an attempt to identify the problem. A follow-up report will be submitted with the findings of the investigation.

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