05000280/LER-1979-007-03, /03L-0 on 790320:w/unit Shutdown,Visual Insp Resulted in Declaring One Snubber Inoperable Because of Low Fluid Level.Caused by Leakage from Reservoir Fill Fitting. Snubber Removed & Rebuilt

/03L-0 on 790320:w/unit Shutdown,Visual Insp Resulted in Declaring One Snubber Inoperable Because of Low Fluid Level.Caused by Leakage from Reservoir Fill Fitting. Snubber Removed & Rebuilt

ML18114A462
Person / Time
Site:	Surry
Issue date:	04/17/1979
From:	Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18114A461	List: 05000280/LER-1979-007, Forwards LER 79-007/03L-0 05000280/LER-1979-007-03, /03L-0 on 790320:w/unit Shutdown,Visual Insp Resulted in Declaring One Snubber Inoperable Because of Low Fluid Level.Caused by Leakage from Reservoir Fill Fitting. Snubber Removed & Rebuilt
References
LER-79-007-03L-02, LER-79-7-3L-2, NUDOCS 7904230259
Download: ML18114A462 (2)

LER-1979-007, /03L-0 on 790320:w/unit Shutdown,Visual Insp Resulted in Declaring One Snubber Inoperable Because of Low Fluid Level.Caused by Leakage from Reservoir Fill Fitting. Snubber Removed & Rebuilt

Event date:
Report date:
2801979007R03 - NRC Website

text

NRC FORM 366 (7-77)

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LICENSEE EVENT REPORT I '

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!J LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT 58' CON'T

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~:~~~ ~©I O I 5 I O I O Io 12 Is Io 101 01 60 61 DOCKET NUMBER 68 69 3 I 21 o I 71 9 JG) I o I 4 I 1 I z I z I q I 0 74 75 REPORT DATE 80 EVENT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

l With the unit shut down, Snubber Visual Inspection (PT-39B-2) resulted in one snnhher

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Jbeing declared inoperable because of low fluid level.

This condition is reportable [QID Jin accordance with T.S. 6.6.2.b.(2).

The health and safety of the public were not [TI[] !affected by this event.

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SYSTEM CODE IC lB I@

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REPORT 17 I 9 I NUMBER 21 22

CAUSE

CAUSE CODE SUBCODE COMPONENT CODE

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11 12 13 18 SEQUENTIAL OCCURRENCE REPORT NO.

CODE I O j O j 7 J I/!

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23 24 26 27 28 29 COMP.

SUBCODE

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19 REPORT TYPE

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VALVE SUBCODE LL!@

20 30 31 PRIME C.OMP.

TAKEN ACTION ON PLANT METHOD HOURS SUBMITTED NPRD-4 FORM SUB.

SUPPLIER REVISION NO.

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32 COMPONENT MANUFACTURER 80 ACTION FUTURE EFFECT SHUTDOWN

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ATTACHMENT

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33 34 35 36 31 40 41 L!J I B 12 I O 19 I@

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS@

42 43 44 47 jDisassembly and inspect ion revealed that the major portion of the lea~age was from the o::IIJ 1reservoir fill fitting.

The snubber was removed and rebuilt and is awaiting testing [Iill !prior to reinstallation.

All snubbers will be visually inspected for operability prior!

o::::JJJ Ito unit startup.

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9 FACILITY STATUS

% POWER OTHER STATUS

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9 10 12 11 44 ACTIVITY CONTENT Q\\

RELEASED OF RELEASE AMOUNT OF ACTIVITY [iliJ ~@ ~@...... I ____

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9 10 11 44 PERSONNEL EXPOSURES Q

80 METHOD OF

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DISCOVERY DISCOVERY DESCRIPTION ~

L!J@jL-M_e_c_h_a_n_i_c_' _s_o_b_s_e_r_v_a_t_i_o_n _________ _.

45 46 80 NA LOCATIO.N OF RELEASE @

45 BO NUMBER TYPE

DESCRIPTION

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9 11 12 13

. PERSONNEL INJURIES Q

NUMBER DESCRIPTION6 QTIJ jO jO jO j@L--_N_A ________________________ __.

80 7

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11 12 80 LOSS OF OR DAMAGE TO FACILITY '43' TYPE

DESCRIPTION

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10 80 PUBLICITY f'.:;;\\

7904230-'"""'c-Gj NRCUSEONLY ISSUEDQ DESCRIPTION~

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9 10 68 69 80 oi NAME OF PREP AR E~v_._L_._S_te_,_v_a_r_t ___________

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• (At ta2hment, page 1 of 1)

Surry Power Station, Unit 1 Docket No. 50-280 Report No. 79-007/03L-O Event Date. 3/20/79 Snubber l-RC-HSS-135 Inoperable

1.

Description of Event

With the unit shut down, SnubbeT Visual Inspection (PT-39B-2) resulted in one snubber being declared inoperable because of low ilutd level~

This condition is reportable in accordance with Technical Specification 6.6.2.b.(2).

2.

Probable Consequences of Event/Status of Redundant Systems:

One snubber represents a very small percentage of the total seismic restraint installation.

Since these are restraints provided for~ low probability event, and since unit operation was normal from startup to shutdown, the health and safety of the public were not affected.

3.

Cause of Event

Disassembly and inspection revealed that the major portion of the leakage was from the reservoir fill fitting.

4.

Irrnnediate Corrective Action:

The snubber was removed, rebuilt, andd 1s awaiting test prior to reinstallation.

S.

F~ture Corrective Action:

None required.

6.

Actions Taken to Prevent Recurrence:

All subbers will be visually inspected for operability prior to unit startup.

7.

Generic Implications:

Since this was the only low level discbvered of all snubbers inspect-ed, this is considered a random event, and as such, theie are no generic implications.