05000373/LER-1982-168-03, /03L-0:on 821201,steam Leak Discovered on Pressure Sensing Line for RCIC Instruments DPIS 1E31-N0007B & Ps 1E31-N022B&D.Caused by Failure of Compression Fitting on Instrumentation Steam Pressure Line.Leak Repaired

/03L-0:on 821201,steam Leak Discovered on Pressure Sensing Line for RCIC Instruments DPIS 1E31-N0007B & Ps 1E31-N022B&D.Caused by Failure of Compression Fitting on Instrumentation Steam Pressure Line.Leak Repaired

ML20028C203
Person / Time
Site:	LaSalle
Issue date:	12/30/1982
From:	Houston R COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20028C184	List: 05000373/LER-1982-168, Forwards LER 82-168/03L-0 05000373/LER-1982-168-03, /03L-0:on 821201,steam Leak Discovered on Pressure Sensing Line for RCIC Instruments DPIS 1E31-N0007B & Ps 1E31-N022B&D.Caused by Failure of Compression Fitting on Instrumentation Steam Pressure Line.Leak Repaired
References
LER-82-168-03L, LER-82-168-3L, NUDOCS 8301070197
Download: ML20028C203 (3)

LER-1982-168, /03L-0:on 821201,steam Leak Discovered on Pressure Sensing Line for RCIC Instruments DPIS 1E31-N0007B & Ps 1E31-N022B&D.Caused by Failure of Compression Fitting on Instrumentation Steam Pressure Line.Leak Repaired

Event date:
Report date:
3731982168R03 - NRC Website

text

.

ma m.m m. m...

..m. v...

CONTROL BLOCK: I l

l l

l l

lh (PLEASE PRINT OR TYPE AI.1.REQUIREO INFIRMATION)

)

a

!ij l II LI Ll S ! C l 1 l@l 01 01 -1 010 ! 0 l 0 l 0 l-l0 l0 l@l 4 I 1 l 0 l 0 ! 0 !@l l

lg j

4 9 LICENSEE COCE 14 15 LICENSE NUMBER 25 26 1.aCENSE TYPE Jo 57 CAT 6s wT iij

,gyy l L @l 0 l 5 l 0 l 0 10 13 17 13 @l1l210111812 @l1l2l310 l 8 l2 l@

• E'C 8

60 61 COCKET N6MS ER 68 69 EVENT DATE 7A 73 REPORT DATE 80 EVENT OESCRIPTION AND PROBABLE CONSEQUENCES h On 12/1/82 at 0530 hours0.00613 days <br />0.147 hours <br />8.763227e-4 weeks <br />2.01665e-4 months <br /> a steam leak was discovered on a pressure sensing line for

[

,j:l l the RCIC Instruments DPIS lE31-N007B and PS lE31-N022B&D.

Redundant DPIS lE31-N013B g

,3, g

would have performed its design function had a steam line isolation been required.

g

,,g Redundant PS lE31-N022A&C would have isolated the RCIC Outboard Stean Line Isolation y

,,3, Valve on low pressure as designed. The health and safety of the public was preserved at all times.

g l

1

)

J18l l so ;

sEo*E su'sE2EE

• EoE "cocY sus $$E cOMeoNENT cOoE I9) l Cl E lh [h l B lh lP lI lP lE lX lX lh Wh [2]h 8

9 to It 12 13 18 Es 20 SEQUENTIAL OCCURRENCE PEEPoRT REVISIOpe LER/RO EVENT YE AR

. REPORT NO.

CCOE TYPE NO.

@ RE g l218 l 2l l

_l l1l6 l8 l lpl l0l3l y

l

{

t 22 23 24 26 27 28 29 30 31 32 N

c0 P

T METH MOURS S8 i FOR US.

P t.1E MA F

RER l B lgl34 Zjg j Z lg l36Z lg l70 l0 l0 ; 0; gg gg l3Z lg l Z l 9 l 9 l 4g 33 33 3

4o 41 41 4

44 4;

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS The cause of the steam leak appeared to be the failure of a compression fitting on the;

!ol l i

instrumentation steam pressure line.

The cause of the failure could not be determined,

,,,g This was an isolated incident. The leak was repaired on 12/1/82 and the switches g

were, returned to service. REIC System was tested satisfactorily on 12/20/82 g

g following a 17 day outage, no 8 e sA 4 POWER OTHER STATUS On RY OtSCOVERY DESCRff'T10N NA l

l Al@l OBSERVATION l

I !5j l Bl@ l 0 l 4 l 2 l@l ao 45 as 12 n

AETiviTY cOlTENT LOCATION OF RELEASE r. ELE AS E OF RELE ASE AMOUNT OF ACTIVITY NA l

l NA l

is l l Zl l Z l@l t

44 4s so

e to n

PERSONNEL EXPOSUR ES NUM6ER TYPE DESCRtPTION NA l

,;l7ll0)0l0l@lZl@l PEmsONN EL inau'a'its oESCRIPTION@

l.

NuMsER lital 10 l0 l0 l@l NA n

i2 LOSS oF OR OAM AGE TO FACILITY j

TYFE

DESCRIPTION

e NA i91lZlhl so 8301070197 821229 e e io NRC USE ONI.Y oESCRi' TION h PDR ADOCK 05000 O

l ll IIllI1ifIIli lclIgfhl ess es so so. ;;

e e io 357-6761 o

R. Houston N A v E Qs Pn E

• Mt EFA P H CN E:. -

e

\\

I.

LER NUMBER:

82-168/03L-0 l

II.

LASALLE COUNTY STATION: Unit 1 i

III. DOCKET NUMBER:

050-373 1

IV.

EVENT DESCRIPTION

On December 1, 1982 at 0530 hours0.00613 days <br />0.147 hours <br />8.763227e-4 weeks <br />2.01665e-4 months <br /> a steam leak was discovered on a steam pressure sensing line for the RCIC System. The leak affected DPIS lE31-N007B and PS 1E31-N022B&D.

l V.

PROBABLE CONSEQUENCES OF THE OCCURRENCE:

At the time of the occurrence the reactor was in the RUN mode producing 1474 MWT, 450 MWE.

l The containment outboard isolation valves for the affected switches, j

1B21-F414A&B, were immediately closed.

Redundant Differential Pressure Indicating Switch 1E31-N013B would have performed its design function had a steam line isolation been required.

i Redundant pressure switches 1E31-N022A&C would have isolated the RCIC Outboard Steam Line Isolation Valve on low pressure as designed. The health and safety of the public was preserved at all times.

VI.

CAUSE

The cause of the steam leak appeared to be the failure of a compression l

fitting on the instrumentation steam pressure line. The cause of the failure could not be determined.

This was an isolated incident.

VII. CORRECTIVE ACTION

The compression fitting was tightened immediately, however, the leak was not curtailed.

The outboard containment isolation valves, 1B21-F414A&B, were then closed to isolate the instruments.

The RCIC Steam Supply Isolation Valves 1E51-F063 and 1E51-F008 were also closed.

Work Request L20835 was written to repair the tubing. This Work Request was completed and the pressure switches were returned to service on 12/1/82. The RCIC System was tested satisfactorily on 12/20/82 per

(.

LOS-RI-Q3 following a 17 day outage.

l Prepared by:

R. W. Houston i