ML19095A503

Submit Licensee Event Report No. LER-78-015/03L-0 Re Valve Cleanliness Inspection Found Foreign Material on Valve Seating Surfaces

ML19095A503
Person / Time
Site:	Surry
Issue date:	06/27/1978
From:	Stallings C Virginia Electric & Power Co (VEPCO)
To:	O'Reilly J NRC/RGN-II
References
Serial No. 365 LER 1978-015-03L-0
Download: ML19095A503 (4)

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LICENSEE EVENT REPORT Ci'.>NTROL BLOCK: _ ___.__ __.____.__~_

• _._____.6j \..V '1' (PLEASE PRINT OR TYPE -REQUIRED INFORMATION)

[IE] I v*I 7 8 9 A I s I P I s I 1 101 o I o I - I o I o I o I o I o I - I o I o 101 4 I 1 l 1 I 1 I 1 101 I 10 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58 CON'T

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~ I While conducting a valve cleanliness inspection prior to unit startup, it was

[QJI) I discovered there was a foreign material on the valve seating surfaces. Despite its

~ presence, .it is not believed this foreign material would have significantly affected

[ill] the valve operation to the extent that the health and safety of the general public

@JD would have been jeopardized.

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7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUB CODE COMPONENT CODE SUBCODE SUBCODE I:£TIJ 7 8 I zl zJ@ w@ w@ Iv IA 11, Iv IE Ix I@ w@ w@

9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION

.~ REPORT NO. CODE TYPE NO.

w LE R/RO LVENT YEAR 0 REPORT NUMBER 17 1 s I l.:=J Io I 1 1s I I28 oI 329I L_Qj 21 22 23 24 26 27 30 31 32 ACTION F;JTURE EFFECT SHUTDOWN r:;::;., ATTACHMENT NPRD-4 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS ~ SUBMITTED FORM SUB . . SUPPL! ER MANUFACTURER LfJ@LBJ@)

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36 Io Io Io Io I Lu@

37 40 41 uJ(§)

42 ul@ I Al zj o! ol@:

43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

~ I The lack of any definitive administrative guidance as to what lubricants (if any) may I

[III] l be used during valve maintenance contributed to this problem. It is also believed the!

o:::I]J substance was used during dry valve testing to preclude the possibility of seating surt

[I))] I face damage. The valves were cleaned and procedures modified to include more precise I

~ I inspection by Quality Control personnel following maintenance and prior to operations.I 7 8 9 80 FACILITY STATUS  % POWER OTHER STATUS

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\::J METHOD OF l:)ISCOVERY DISCOVERY DESCRIPTION r:;::;,.

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RELEASED OF RELEASE 9 10 11 AMOUNT OF ACTIVITY

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44 45 N/A LOCATIO.N OF RELEASE 80 PERSONNEL EXPOSURES r::;:;,.

NUMBER ,:;::;,. TYPE DESCRIPTION ED] o I o I oJuj@..__ _ _- = N ' " " " A " - - - - - - - - - - - - - - - - - - - - - - "

7 8 9 11 12 13 80 PERSONNEL INJURIES Q NUMBER DESCRIPTION6

~ ol ol o!@ NA 8 9 11 12 80 LOSS OF OR-DAMAGE TO FACILITY '43' TYPE DESCRIPTION i.;::;)

[TI]~@ N/A B 9 10 80 PUBLICITY C\

ISSUEDQDESCRIPTION~ NRC USE ONLY "'

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Surry Power Station, Unit 1 Docket No: 50-280 ~

Report No: 78-015/03L-0

~vent Date: 5-28-78 FOREIGN MATERIAL IN CERTAIN VALVES

1.

Description:

With the unit at refueling shutdown station personnel were conducting an inspection of sixteen suspect valves to insure cleanliness prior to unit startup. On 5-28-78, Containment Spray Isolation Valves (MOV-CS-lOlC, lD) were found to contain about 10 to 50 milliliters each of a material that appeared to be grease, adhering to the seating surfaces of the disc and body.

On 6-3-78, a Recirculation Spray Isolation Valve (MOV-RS-l56A) was found to contain a similar foreign substance, also appearing to be grease. The quantity was about five to ten milliliters. Again, on 6-19-78, Residual Heat Removal valve (MOV-RH-100) was found to contain a thin coating of a material that was later evaluated as grease on its disc and body seating surfaces, Discussions with maintenance personnel also revealed that MOV-RS-156B was found to contain a foreign substance when initially opened in late April 1978 for maintenance. All other valves inspected were free of foreign materials.

The inspection had been initiated. upon receipt of information that lu-bricating substances may have been used to enhance the "blue" t~chnique and to lubricate the dry sliding seating surface contact areas in the valves.

The event is reportable in accordance with Technical Specification 6.6.2.b.(3).

2. Probable Consequences/Status Of Redundant-Systems Although the valves found to contain foreign material were valves that would be called upon to provide isolation of the reactor containment building under abnormal conditions, the effect of the foreign material would be negligible under all operating conditions. The redundant features of the systems in which these valves are installed provide further assurance of leak-age prevention reducing even further the effect of the foreign materials.

These features are:

(1) In RHR system, the counterpart of HOV-PJI-100 inside containment is a manual valve, normally shut during all operating and acci-dent conditions.

(2) In the Containment Spray system, there are check valves inside containment that serves as a back-up to the normally closed MOV-CS-lOlC, D.

(.3) The Recirculation Spray system is a closed system outside of containment and in addition there is a check valve inside con-tainment that backs-up pump discharge valves MOV-RS-156A & B.

On these bases, the health and safety of the public would not have been affected.

Surry Power Station, Unit 1

'Docket No: 50-280

~Report No: 78-015/031-0 ~

Event Date: 5-28-78 e FOREIGN MATERIAL IN CERTAIN VALVES

3. Cause:

According to the best recent infonnation available, the material had been introduced into the valves by personnel to lubricate and enhance bluing (fitting) the valve discs during dry testing.

4. Immediate Corrective Action The affected valves were thoraugh~y cleaned and reassembled under QC surveillance.

5. Subsequent Corrective Action With the valves cleaned, reiapped and tested, no further corrective.

action of a repair nature was required.

6. Actions Taken To Prevent Recurrence On May 30, 1978, an adrr.i.nistrative policy was issued to all station em-ployees delineating the materials to be used in type C testing (10CFRSO, App. J).

The procedures governing valve repair were changed on June 1, 1978 to include a specific step for QC witness of valve close out.

7. Generic Implications; The generic nature of this problem has been precluded through the pro-cedures outlined above.