ML18113A901

LER 79-006/03L-0 on 790204:at Cold Shutdown,Valve MOV-SW-203D Failed to Operate Electrically During Functional Test.Caused by Mechanical Binding of Valve.Valve Bearing Was Replaced

ML18113A901
Person / Time
Site:	Surry
Issue date:	03/02/1979
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18113A899	List: ML18113A898 ML18113A900 ML18113A901 ML18113A902
References
LER-79-006-03L-01, LER-79-6-3L-1, NUDOCS 7903080237
Download: ML18113A901 (2)

Text

-

U.S. NUCLEAR REGULATORY COMMISSION.

e LICENSEE EVENT REPORT CONTROL BLOCK: L_L_j_..____.___._l___.I 0) (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6 1:I:EJ 7 8 l vI A l s I P I s I 9 LICEl'JSEE CODE 2

14 10...._Io_..__o__._l_-_..l_o_..l_0 __._I_o_.__I_o. .1. . . _o~I--~I~cj~ol G)I 15 LICENSE NUMBER 25 26 11 11 LICENSE TYPE 11 1!~l 30 I I~

57 CAT 58 CON'T

• IT::GJ ~~~~~~ ~©I oI s I o I oI oI 2 1 8 1 1 101 01 21 01 41 11 91@1 01 31 01 21 11 7 8 60 61 DOCKET NUMBER 68 L..69_ _.___E_.V_E-NT~D-AT-E~~-c:-'.74 75 REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

I With the unit at cold shutdown, MOV-SW-203D failed to operate electrically during

[III] PT-8-SA. This is contrary to Technical Specification 3 .14.A.6 and is reportable per

~ i__:rechnical Specification 6. 6. 2. b. (3). The redundant flow path was operated satisfac-1))}] torily and therefore the health and safety of the general public was not affected.

c.mJ 7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

[ETIJ I w1 Ai@ ~@ l!J@ I v1 Al LI Vj E[ xi@ ~@ LEJ@

7 8 9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION Q LER/RO CVENT YEAR REPORT NO. CODE TYPE NO.

~ flEPORT NUMBER 17 I 91 I O

I 0

1 6

1 L q 3 ~ ~

21 22 23 24 26 2*1 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN (??'i ATTACHMENT NPRD-4 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS ~ SUBMITTED FORM SUB. SUPPLIER MANUFACTURER l~@~@)

33 34

~@

35 L:J 36 1_o 1o 1o I 40I L2J@

3/ 41 L:J 42

~@ I p I 3 14 1°1@

43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

IMOV-SW-203D failed to operate during PT-8.SA due to a mechanical binding of the valve.

OJI] IA bearing in the limitorque operator was replaced.

((ill

[ITIJ

[Cw 7 8 9 80 FACILITY STATUS  % POWER OTHER STATUS @) METHOD OF DISCOVERY DISCOVERY DESCRIPTION @

[QI] L::J@ Loi o1 ol@.__I_N_A_ _ _ __ ~@ NA 8 9 10 12 11 44 45 46 80 ACTIVITY CONTENT ~

RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATIO.N OF RELEASE @

~ ~@) l~@.__I____N_A_ _ __ NA 7 8 9 10 11 44 45 ,... 80 PERSONNEL EXPOSURES r:;;;,..

NUMBER r:::;., TYPE DESCRIPTION~

CiTIJ I j O j O O l~@......_N_A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _~ - - - - - - -

7 8 9 11 12 13 80 PERSONNEL INJURIES (;";\

NUi1.:1.BER DESCRIPTION6

[QZj O j u j O l@L--__ NA_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _____,

8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY 0 TYPE DESCRIPTION '<:.:;J (Cill ~@ NA 7 8 9 10 0 ~ "2.-, 80 ISS!.!=~~~;;CRIPTION~ 790308 .J NRC USE ONLY "'

1 rI12]

7 8

~~~l~~-ii.K_~~~--~~~--~~~~~~--~~-

9 10 GB LI I I I I I I I I I I 69 I~

80 '"

W. L. Stewart (804) 357-3184 0 0.

NAME OF PREPARER - - PHONE:------------- \!)

e

/

Attachment*l, page 1 of 1 Surry Power Station, Unit 2 Docket .No: 50-281 Report No: 79-006/03L-0

1. Description of Event:

With the unit at cold shutdown, valve MOV-SW-203D failed to operate electrically during PT-8.SA (Consequence Limiting Safeguards functional test).

This is contrary to Technical Specification 3.14.A.6 and is reportable per Technical Specification 6.6.2.b(3).

2. Probable Consequences and Status of Redundant Systems:

Valve MOV-SW-203D provides one flow path of service water to the Recirculation Spray Heat Exchangers. However, 100% flow capability existed through M0,V-SW-203A and B which were demonstrated to operate properly during PT-8.SA, therefore, the health and safety of the public were not affected.

3. Cause:

MOV-SW-203D failed to operate during PT-8.SA testing because of a mechanical binding of the valve.

4. Immediate Corrective Action:

The immediate corrective action was to attempt to manually operate the valve. The valve would still not cycle, therefore PT-8.SA testing was continued.

5. Subsequent Corrective Action:

MOV-SW-203D has been completely dismantled, inspected, cleaned, and lubricated. A bearing in the limitorque operator was replaced.

6. Future Corrective Action:

There is not any future corrective action deemed necessary at this time.

7. Generic Imulications:

None