05000366/LER-1980-004-03, /03L-0:on 800118,during Steady State Power Operation Hydrogen Recombiner Inlet Valve 2T49-F003A Did Not Open.Caused by a Failed Torque Switch.Sys Returned to Operation After Switch Was Replaced

/03L-0:on 800118,during Steady State Power Operation Hydrogen Recombiner Inlet Valve 2T49-F003A Did Not Open.Caused by a Failed Torque Switch.Sys Returned to Operation After Switch Was Replaced

ML19296A748
Person / Time
Site:	Hatch
Issue date:	02/07/1980
From:	GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19296A747	List: 05000366/LER-1980-004, Forwards LER 80-004/03L-0 05000366/LER-1980-004-03, /03L-0:on 800118,during Steady State Power Operation Hydrogen Recombiner Inlet Valve 2T49-F003A Did Not Open.Caused by a Failed Torque Switch.Sys Returned to Operation After Switch Was Replaced
References
LER-80-004-03L-01, LER-80-4-3L-1, NUDOCS 8002150381
Download: ML19296A748 (2)

LER-1980-004, /03L-0:on 800118,during Steady State Power Operation Hydrogen Recombiner Inlet Valve 2T49-F003A Did Not Open.Caused by a Failed Torque Switch.Sys Returned to Operation After Switch Was Replaced

Event date:
Report date:
3661980004R03 - NRC Website

text

/

I U.S. NUCLE An nCCUL ATORY COMMf SSION MC F Git?.13Co*

1 !!\\

LICENSEE EVENT REPORT CONTnOL BLOCK: [

]

\\

\\

l l

lh (PLE ASE PRINT On TYPt ALL REQUIRED INFORMATION)

I 6

Ic la le li IH 12 l@l 01 nl al ni ol ni nl nl 0101 nI@[4111 it if il@l

( [g 01 h

N LICLP.5L TYPE JO

$1 f.A T to 8

9 LaCENSEE CUOL I4 15 LICEP.sE t.uvdLH

$ lL ]@l 0] 5] 0] 010] 316l 61@l 0] il il Si 8l0 l@lOf2l0l7l8l0l@

CON'T u3 6J EVENT DATE 14 75 REPORT O AT E

1. 0 O

1 60 61 DOCAET NuVoER 7

8 EVENT DESCniPTION Ar4D PROGACLE CONStCUENCES h Containcent Hydrogen Recombiner System Functional Test, l

lo 121 ] Valle perforcing Pri=ary IC;P-2-3606, durin;; steady state power operation, the Recombiner Sheath Temperature l

10]3] I I n 1. ) l did not increase to 26000?. within 60 minutes, reference Tech. Specs. 3.4.6.6.2A.

This is a non-repet-l The redundant "B" Hydro;;en Recc=biner Systen remained operable.

lo I5I l There were no effects to public health or safety duc to this event.

g

[ o I r, } [ itive event.

I O

7 l 1

60 0

3 COMP.

VALVE SYSTTM

CAUSE

CAUSE CODE CODE SUSCCOE COMPONENT CODE SUBCODE SUBCODE IS IE lh dh l Alh l VI Al Ll Vl 0) Plh l A l@ W h lO191 7

8 9

10 11 12 13 18 19 20 REVISION SEQUENTI A L OCCURRENCE REPORT

_EVENTYEAR REPORT NO..

CODE TYPE N O.

h gg l218l 0l l-j

] 0l 0] 4l l/l [0l3l [L]

b l0l LEP no 22 23

• 24 26 27 28 29 JJ 31 J2 ATTACWVE NT NPAD-4 PRIME COYP, COMPONENT 1AKEN ACT IO N OvPLANT VETwCD HOUR $

$US?/ITT E D 50RM bus.

SUPPLIE n MANUFACTURER ACTION FUTUAE EFFECT 5 'UTOOWN I is ]gj Zj@

] Zl@

l 7J@

l 010l 0)

[ [ Q lMl@

l Al@

l L l 2 l 0 l 0 [@

31 40 41 42 43 44 47 33 34 h

.u CAUSE DESCRIPTIO'J AND CORRECTIVE ACTIONS h the Hvdrogen RecO=biner Inlet Valve, 2T49-F003A, did not l g g ] Investigatica revealed that at 800 as required to establish a j

J open when placing the flow controller satpoint 1

3 The switch was replaced g,j_,,) flou of 150 scfc. The problem was a failed torque suitch.

[ uith a new one af ter which the system was functionally tested and proven operable

~

[

3, UNP-2-3606.

l per Primary Containrent Hydrogen Reco 51ner System Functional Test,

]3 je j ]

30 7

8 3 5O HY DISCOVERV DESCRIPTio4 51 U

• s PC'/.E R CTHE R STATUS l

NA I

IB lhiOncratorObservation l115j Irlh I014l4lhl ACliviiv CONTENT LOCATION OF PELE ASE RF LE ASIO OF nELE ASE AMOUNT OF ACTIVITY l

NA I

I N^

I2 la I LzJ @ Ld@l 80 44 45 7

s 9 to 11 PEnSO%Et EKPOSUAES NutaE R TYPE DE SCRIPTION -

NA T1[nIaia!@lZl@l 80 i

PLf4 SOW.t L l'.JU 115

'.v.m E n SESCA!PTtO*4 t

N^

L

.i i o i o l o ei CO 1

0 11 12 LO% Of Or1 Dr. ? AGE TO FACILITY NA l

14PL ULZhi+'110ks l1 l a l [h ao 7

u v to NRC USt ONLY

'U"1 'C' i '

inuty tatsCmPliuN o-NA g 00215 0 ll 1 [ t I I i i i i i i lj :l -

',if!

E8 6 'J b0 1 7

- o o

8 x 0 tu

o t

I I

1 i

NARRATIVE

REPORT O

I Georgia Power Company l

Plant E. 1. Hatch Baxley, Ga. 31513 1

Reportable Occurrence Report No. 50-366/1980-004.

While performing Primary Containment liydrogen Recombiner System Functional Test, IINP-2-3606, during steady state power operation, the Recombiner Sheath Temperature did not increase to 36000F. within 60 minutes as required by Tech Specs., Section 3.4.6.6.2.A.

The redundant "B" Eydrogen Recombiner

' System remained available and operabic.

~

Investigation revealed that the Hydrogen Recombiner Inlet Valve, 2T49-F003A, did not open when placing the flow controller setpoint at 8000 as required to establish a flow of 150 scfm.

The problem was a f ailed torque switch.

The switch was replaced with a new one af ter which the system was proven operable by the Primary Containment liydrogen System Functional Test, ENP-2-3606.

Although we have had torque switch failure, the f ailure rate is not such that we feel we have a gen ~eric problem.

There were no effects to public health or safety due to this event. No further action is planned.

O a

@meq 6,

m.

e d' e

e me e

e