ML19095A758

Forwarding Abnormal Occurrence Report No. AO-S1-75-10

ML19095A758
Person / Time
Site:	Surry
Issue date:	04/22/1975
From:	Stallings C Virginia Electric & Power Co (VEPCO)
To:	Moseley N NRC/RGN-II
References
Serial No. 517 LER 1975-010
Download: ML19095A758 (3)

Text

i VIRGINIA. ELECTRIC A.ND POWER COMPANY RICHMOND, VIRGINIA.23}~!31 April/22{,,1975 1 ... ' /.;~:

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Mr. Norman c. Moseley, Director Office of Inspection and Enforcement

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United States Nuclear Regulatory Comm1.ss;L.~-:; T ,;,:_,

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• Region II - Suite 818 --------.:_ .:-- -

230 Peachtree Street, Northwest Atlanta, Georgia 30303

Dear Mr. Moseley:

Pursuant to Surry Power Station Technical Specification 6.6.B.1, the Virginia Electric and Power Company hereby submits forty (40) copies of Abnqrmal Occurrence Report No. AO~Sl-75-10.

The substance of this report has been reviewed by the Station Nuclear Safety and Operating Committee and will be placed on the agenda for the next meeting of the System Nuclear Safety and Operating Committee.

Very truly yours, tf;. J?;. y:/}at?,:-V~

C. M. Stallings Vice President-Power Supply and Production Operations Enclosures 40 copi.es of AO~Sl-75-10 cc: Mr. K. R. Goller

LICE~~SEE EVENT FiEPORT AO-Sl--75-10 CONTROL BLOCK:,. , , _ _,___.____._! _J_j 1 6 LICENSEE LIC_ENSE EVENT NAME LICENSE NUMBER TYPE TYPE

@DJ L.YJ Als Ir Is I 1 I I *o I o1-- Jo Io Io o I o 1-10 j_~ 14 11 '111 lo I I o I 1 I J

7 8 9 14 15 25 26 30 31 32 REPORT REPORT CATEGORY TYPE. SOURCE DOCKET NUMBER EVENT DATE REPORT DATE

• @IT]coN'T IP j o j ~-~ lo Isl 01.-:..10 !2 ls jo I 10141112111s1 !Oltil1[8[7j5j 7 8 57 58 59 60 61 68 69 74 75 80 EVENT DESCRIPTIDr\l

@JgJ jDuring normal operation the Process Vent System Particulate Radiation Monitor Alarm _J 7 8 9 80

@@] jwas manually initiated to demonstrate the actuation of automatic shutoff valves in -I 7 8 9 BO

@El !the system to a trainee. Valve FCV-GW-260 failed to shut as required by Technical _J 7 8 9 80

@El jSpecification 3.7-2E. AO~Sl-75-10 I

7 8 9 80

@NJ 7 8 9 PRIME 80 SYSTEM CAUSE CDMPONEl~T COMPONENT CODE CODE COMPONENT CODE SUPPLIER MANUFACTURER VIOLATION

@0 ls ls 1 ~ !RIEILJA!YIXJ ~ ~ ~

7 8 9 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION

~ jA Westinghouse Electric Corporation Model MG-6 relay (Latch-Reset) in the control 7 8 9 80

~ jcircuit for valve FCV-GW-260 was found to be stuck in the "operate" position causing I 7 8 9 80 QJ§]  ! FCV-GW-260 not to shut. I 7 89 8- 0 FACILITY METHOD OF STATUS  % POWER OTHER STATUS LJISCOVERY DISCOVERY DESCRIPTION Eill ~ l!_l ol oJ N/A ~ N/A 7 8 9 10 12 13 44 45 46 80 FORM OF ACTIVITY CONTENT rn RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE 7 8 Li 9

w l 10 11 N/A 44 45 N/A 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION 7

~

8 9 Io I oI 0111 w12 13 I N/A 80 PERS"ONNEL INJURIES NUMBER DESCRIPTION EEi l_Qjo Io I ';::--_ _N_;_,/_A_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _~_J 7 8 9 11 12 80

. OFFSITE CONSEQUENCES l3Til L ________N_/A._ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __J 7 8 9 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION 7

!ill8 9L?:J 10I N/A 80 PUBLICITY 7

om 8 8 N/A BO ADDITIONAL FACTORS N/A 7[ili]89:;----------------------------------------------~

80 7

IBfil8 9 80 NAME: E. M. Sweeney, Jr. - - - PHONE: (80/f) 357-31811 GPO O O1

• 6 G7 J

.., ' e e SUPPLEMENTARY INFORMATION FAILURE OF VALVE FCV-VW-260 TO OPERATE PROPERLY AO-Sl-75-10 On April 12, 1975 at about 0515 an alarm was manually initiated on the Process Vent System particulate radiation monitor to demonstrate the operation of various trip valves in the system to a trainee. The automatic isolation valve for the Unit No. 2 containment vacuum pump discharge (FCV-GW-260) would not shut as required by Technical Specification 3.7-2E.

Investigation into the problem revealed that the valve was mechanically operable, but was not receiving a "shut" signal from the control circuit.

Further troubleshooting revealed that a relay in the control circuit was stuck in the "operate" position preventing FCV-GW-260 from shutting. The affected relay was found to be excessively dirty thus preventing proper operation.

The relay was thoroughly cleaned, adjusted, tested and placed back in operation.

• I