ML19105A079

LER 78-026/03L-0. Follow-up Inspection for Valve Cleanliness, Discovered That Containment Spray Isolation Valves (MOV-CS-201C and D) Contained No More That Five Milliliters. Technical Specification TS 6.6.2.b.(3)

ML19105A079
Person / Time
Site:	Surry
Issue date:	08/11/1978
From:	Stallings C Virginia Electric & Power Co (VEPCO)
To:	O'Reilly J NRC/RGN-II
References
LER 1978-03L-00
Download: ML19105A079 (4)

Text

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LICENSEE EVENT REPORT

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[IIu I VI 7 8 9 A I s I p I s I 2 1010 LICENSE~ CODE 14 15 10 1- 10 P p lo I o I -I oI o1014 LICENSE NUMBER-* . 25 26 .

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!While conducting a follow-up inspection for valve cleanliness, it was discovered that

--- rr::r:I) I Containment Spray Isolation Valves (MOV-CS-201C and D) contained no more than five

[III] jmilliliters of a lubrication material on the valve seating surfaces. Despite its

.. [))}] !presence, it appears that the effect of the lubricating material is negligible and I

[Ill !that the health and safety of the public were not affected. The event is currently

[I]1J 1considered reportable per T.S. 6.6.2.b.(3).

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7 8 9* 80 SYSTEM

• CAUSE CAUSE COMP. VALVE CODE CODE SUB CODE COMPONENT CODE* SUBCODE SUBCODE

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

v..v REPORT NUMBER 17 ~ I 1°1 2 1 6 1 l~ l0 131 ~ [_Q_J 21 22 23 24 26 27 28 29 30 31 32 ACTION FUTURE EFFECT SHUTDOWN ~ ATTACHMENT NPR0-4 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD HOURS SUBMITTED FORM SUB. SUPPLIER MANUFACTURER e.J@t::_J@

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~@) I44A I 2 IO 1' 0 I 43 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

!The lack of definitive administrative guidance on lubricants permitted for maintenance OJI] !contributed to this problem. It is believed that a small amount of lubricant was used

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[I]}] Ito prevent damage during assembly and dry testing. The valves were cleaned. Proce-

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9 80 FACILITY

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7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIPTION

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7 8 9 10 68 69 80 en T. L. Baucom (804) 357-318!~ 0 (l.

NAME OF P R E P A R E R - - - - - - - - - ' - - - - - - - - - - - PHONE:------------- CJ

e Surry Power Station, Unit 2 Docket No: 50-281 Report No: 78-026/031-0 Event Date: 7-12-78 Foreign Material in Valves

1.

Description:

With the unit at cold shutdown, a follow-up inspection was being con-ducted on valves susceptible to foreign material inclusion but not previous-*

ly inspected. The eight-inch solid disc gate valves in the containment spray lines (MOV-CS-201C and C) were found to have their disc and body seating surfaces very lightly coated with a grease like material. The material upon removal wa.s estimated at a total quantity of not more than five milliliters and was identified as 11 0 11 ring grease. The event is currently considered reportable in accordance with Technical Specification 6.6.2.b.(3).

2. Probable Consequences/Status of Redundant Systems:

In conjunction with the inspection, a limited program of valve testing (10CFR50 App. J, Type C Test) was conducted to evaluate the effect of lub-ricants on the leak tightness of the valves. Tests were conducted: prior to opening; after opening and cleaning; with light lubricant; and finally completely clean and dry.

The results of the tests to date have been inconclusive with respect to the effect of lubricants as aids to sealing of the valves.

The valves examined are closed in normal operation and any leakage through the valves would be leakage into containment. Under conditions in.which 'containment out leakage was probable, the valves would contain a water seal and would be backed up by check valves inside the contain-ment, On this basis, the health and safety of the public have not been affected,

3. Cause:

According to the best recent information available, the material had been introduced into the valves at some earlier time to lubricate the in-ternal metal-to.-metal contact during dry testing.

4. Immediate Corrective Action:

The valves were solvent cleaned, and were assured to be free of all foreign material prior to final close out .

. 5. Subsequent Corrective Action:

With the valves cleaned and tested, no further action of a repair nature was required. The investigation.will continue on the use of light lubricants to prevent damage to disc and body seating surfaces during as-sembly and dry testing of valves.

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e Surry Power Station, Unit 2 Docket No: 50-281 Report No: 78-026/03L-0 Event Date: 7~12-78 Foreign lvJaterials in Valves

6. Actions Taken to Prevent Recurrence:

I On Hay 30, 1978, an administrative policy was issued to all station I employees regarding the materials to be used in Type C testing as defined in 10CFR 50 App. J.

The procedures governing valve repair were changed on June 1, 1978 to incude QC witness of valve close-outs.

7. Generic Implications:

Completion of the follow-up inspection and implementation of the actions in 6 above preclude any generic implications.