05000366/LER-1981-071-03, /03L-0:on 810718,while Performing HNP-2-3111,MSIV D Failed to Close within Required Time Frame.Caused by Low Fluid Level in Hydraulic Operator.Operator Recharged & Filled W/Hydraulic Fluid

/03L-0:on 810718,while Performing HNP-2-3111,MSIV D Failed to Close within Required Time Frame.Caused by Low Fluid Level in Hydraulic Operator.Operator Recharged & Filled W/Hydraulic Fluid

ML20010A981
Person / Time
Site:	Hatch
Issue date:	08/06/1981
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20010A980	List: 05000366/LER-1981-071, Forwards LER 81-071/03L-0 05000366/LER-1981-071-03, /03L-0:on 810718,while Performing HNP-2-3111,MSIV D Failed to Close within Required Time Frame.Caused by Low Fluid Level in Hydraulic Operator.Operator Recharged & Filled W/Hydraulic Fluid
References
LER-81-071-03L-01, LER-81-71-3L-1, NUDOCS 8108130182
Download: ML20010A981 (2)

LER-1981-071, /03L-0:on 810718,while Performing HNP-2-3111,MSIV D Failed to Close within Required Time Frame.Caused by Low Fluid Level in Hydraulic Operator.Operator Recharged & Filled W/Hydraulic Fluid

Event date:
Report date:
3661981071R03 - NRC Website

text

NRC FOR$ 366 U. S. NUCLE AR REGULATORY COMMISSION an LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l

lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATioN) i l G l A l E l I l H I 2 l@l010 l-10101010 l0 l 1010 l@l 4l 11 Il Il ll@l l

l@

O i 8 9 UCENSEE CODE 14 15 LICENSE NUMBEH 25 26 LICENSE TYPE JO 57 CAI b8 CON'T

\\

"$RC l L l@l 0 l 5 l 010 l013 l 6 16 l@l 0 l7 11 18 18 11 l@l 01 81 01 61 81 11@

O t f

8 60 61 DOCK ET NUMBER 68 69 EVENT DATE 14 15 REPORT DATE 80 EVENT DESCRIPTION AND PROB ABLE CONSEQUENCES h o 2 i

On July 18,1981, at 0045, with the reactor a' 63% power and performing l

l O 13 ; l HNP-2-3111, the "D" MSIV failed to close wi'l the required time frame l

o 4 l

of 3 to 5 seconds as per Tech Specs 3.6.1.

The closing time was 1.7 l

F6 TTl i seconds.

There was no effects on the health and safety of the public l

l0 ls i l nor was there any effect to plant safety due to this event.

This is a l

0 7 l

repetitive event as last reported on Reportable Occurrence Report No.

l gl 50-366/1981-045.

l l

'ES'E

'^'S!

S0BCEE

^

COD COMPONENT CODE SUB O E S

E l

l C l D l@ [E_J@ [.A_.j @ l V I A l L l V I E l X l@ [F_j@ [_D_j @

0 9 l

7 8

9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LE R EVENT YEAR REPORT NO.

CODE TYPE N O.

l

@ aj g.RO l 8l ll

[.-j l 017l 1l y

l0l3l [L_j

[-- ]

W l

,,,_ 21 22 23 24 26 27 28 29 30 31 32 AKEN AC O ON L NT MET HOURS SB IT FOR B.

SUPPLIER MANUFACTURER LaJ@LZ_J@

l_ ZJ@

LlJ@

l o f ol 0101 ll]@

L!Ll@

l N_]@

lRl314l4l@

l JJ 34 35 3/

40 41 42 43 44 47 l

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i O I

The cause was low fluid level in the hydraulic nnpratnr.

A emall nipro I

Nn damano tn the l

i i l

of shim stock was removed from ht;draulic spal arpa -

, 2 l

seal was found.

The operator was recharged, filled with hydraulic fluid I

i 3 l

and retested satisfactorily.

The unit is now in full compliance.

I i 4 l

l 7

8 9 80 A S

% POWER OTHER STATUS is O RY DISCOVERY DESCRIPTION

(.E_j @ l 01 61 31 @ l NA l

(_H.j@l Surveillance l

i s A TiVITY CONTENT RCLEASED OF RELE ASE AMOUNT OF ACTIVITY LOCATION OF RELEASE [Zj @ l.Zj@l NA l

l NA l

1 6 PERSONNEL EXPOS ES NUV8ER TYPE

DESCRIPTION

y l0 l0 l0 l@ [Z_j @ l NA l

PERSONNE t,N2u'JiES DESCRiPnON@

NuMBE R Lua.J I o l o l o l@l NA l

7 8 9 11 12 80 W$$

St^P%'N

'^

E i

W @l NA l

1 9 7

8 9 10 80 ISSUhE @ DESCRIPTION

((

l_

NA l

lllll1llliII15 2 o B108130182 810806 58 69 80 s PDR ADOCK 05000h.En R. T. Nix, Supt. of Maint.

912-367-7781

{

pgong:

t

a4,

.\\,' "

LER.No.: 50-366/1981-071 Licensee: Georgia Power Company Facility: Edwin I. Hatch Docket No ': 50-366

Narrative

Report for LER 50-366/1981-071 On July 18,1981, at 0045, with the reactor at 63% power and while performing HNP-2-3111, Main Steam Isolation Valve Trip Test, the "D" MSIV, 2B21-F028D, failed to close.within the required time frame of 3 to 5 ' seconds as, per Tech Specs 3.6.1.

The closing time was 1.7 seconds.

There~was no effects-to the safety of the plant or public health due to this event.

The investigation of the failure revealed the hydraulic. fluid level of the valve operator. was low. A small piece of shim stock was found in the hy-draulic seal area which could have. attributed to the failure.

The shim stock was removed and.the hydraulic seal inspected and'.no damaged to the seal was found.

The operator was charged with nitrogen and the hydraulic fluid level brought back to normal.

The valve was retested satisfactorily and returned to service.

The generic review revealed no inherent problems.

The failure due to low hydraulic fluid level is repetitive as last reported on Reportable Occurrence Report No. 50-366/1981-045.. The unit is now.in full compliance and no further reporting is required..

4 t

w

'9d