05000281/LER-1980-045-03, /03L-0:on 801207,containment Vacuum Pumps Were Found Inoperable Due to Open Relay Contact.Caused by Broken Lug on Coil Lead.Lug Was Replaced & Circuit Returned to Normal

/03L-0:on 801207,containment Vacuum Pumps Were Found Inoperable Due to Open Relay Contact.Caused by Broken Lug on Coil Lead.Lug Was Replaced & Circuit Returned to Normal

ML18139B018
Person / Time
Site:	Surry
Issue date:	12/31/1980
From:	Joshua Wilson VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18139B017	List: 05000281/LER-1980-045, Forwards LER 80-045/03L-0 05000281/LER-1980-045-03, /03L-0:on 801207,containment Vacuum Pumps Were Found Inoperable Due to Open Relay Contact.Caused by Broken Lug on Coil Lead.Lug Was Replaced & Circuit Returned to Normal
References
LER-80-045-03L-03, LER-80-45-3L-3, NUDOCS 8101220492
Download: ML18139B018 (2)

LER-1980-045, /03L-0:on 801207,containment Vacuum Pumps Were Found Inoperable Due to Open Relay Contact.Caused by Broken Lug on Coil Lead.Lug Was Replaced & Circuit Returned to Normal

Event date:
Report date:
2811980045R03 - NRC Website

text

--- :----.- -

e-1cEt-..:SE E EVENT REPORT e

CONTROL BLOCK:.__1 _**___,_1 _..___,__~I-~-l G) 1 C

(PLEASE PRINT DR TYPE ALL REQUIRED INFORMATION)

~ ' VI A I s I p I s I 2 101 0 I Q 8

9 LICENSEE CODE 14 15 I a I a I a I o I o 1-I a t-a 101 4 I 1 I 1 I 1 I 1 101 I I 0 LICENSE NUl.':BER 25 26 LICENSE ~YPE

10 57 CAT 56 D

6 2k-,0J7,\\L8 lo IG)l112 13,-U. IBJ_q JG)

EVENT DATE 7~

75 REPORT DATE BO

~:~~~ W© I o I s lo I o I o I 2 1-s., I a 101, J 60 61 DOCKET NUMBER 68 69 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

TI I On December 12, 1980, it was found that the Containment Vacimm Pumps were inoperable D

D D

due to an open Relay Contact.

This is contrary to T.S. 3.1,5.B. and ; 5 :i: reportable as per T. S. 6.6,?,b.(2).

A Jumper was innnediately installed to allow manual operation of a Vacuum Pump.

The health and ~afety of the public were not affected 8 9 SYSTEM CODE Is IA J@

9 10 LE R RO CVENT YEAR

@ h~-:.~~~

l,8 I o _l

..

T1or, FUIL';;E T;...t~E:.

,:..,:11C\\

F~r::r1 c*.: FL~~.:;

CAUSE

CAUSE CODE SUBCODE COMPONENT CODE w@ w@ IEILIElclolN,e 11 12 13

' 18 SEQUENTIAL OCCURRENCE,

REPORT NO.

CODE l=J l o I 4 ! s I I/J 10 13 I

23 2.:.

26 78 29 COMP.

SUBCODE w@

19 REPORT TYPE

~

30 VALVE SUBCODE w@

20 sa.;UTDo*,;:.

• -(.;':;\\

ATTACH:.IENT NPRD~

31 PRll.'.E C:OMP.

SUPPLl!:R ii REVISION NO. w 32 COMPONENT MANUFACTURER L!J@)

T.iETHQ;:;

HOU?.S 8 SUBMITTED FORt.l !>US.

LAI@~@ W@ W l_olololo! W@ LNJ 3-

.>C, 3

40 41

.Q2 IT I 1 I 9 I 8J@)

- 43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS@

I A broken lug was found on a coil lead.

- 47 The lug was replaced and the circuit retmrned to normal.

TI L

1 TI 8

9 FACILITV A

STATUS

', ?::):'.'i:R OTHER ST;..Tus Q D 12J@ 11 I O I O l@I.__ _._N /-=A ___

8 ll*

1'3 ACTIVITY co~:-rc:,;-r

(:;';'\\

RELEASED OF RELE:..SE A1,IOUr;T OF ACTIVITY e Q ~@ LU@.__,I _N_;_/_A _____

8 9

,c, 80 r,*ETHQD OF A,

DISCOVERY DISCOVERY DESCRIPTION W@LI _=..O.r:.p.::e~r-=a~t:.::o~r:..._::0::.:b::.:&::.:e::::.rv:::..:::..~a=-t.:.i~o~n"". _________.....,

- 45

- 46 BO LOCATION OF RELEASE @

N/A 80 FERSC:;,,E:.. EXPCSURES Q.

~ I O Yo",Yo J@1zE1@...

D_Es_c_R_I_FT_1_0_""_~_3_9 __

N_/_A ___..._ _________________________ ~

6 9

11 12 13 PERSO:;:JEL 1:;JURIES

(,;":;\\

BO tJur.~B!:R DESCRIPTION~

]

j O IO I O l@L-_____

____uNL..,C._ __________________

E 9

1, 1:?

BO LC:SS OF O:::C:~.:.*:.:.GE TO F:..CILTTY r,;;-.

r:- 00 --* 0 -10**

6 D i' Znj@~--~-_"_' _* _**------=N!...:../A~------------------

c 9.

~

so F-~.:s:..1.:.;,*

~

?J Trtfe,=~:~.*~,:,,.~ -

~ 8 1 0 l 2 2 U L\\G:cJ..

';.:. *: E OF Pr.E F.:.F.::? __

J_._L_.---CW;.,C1~* l~S::::.O::::.n:c_ __________

NRr. USE ONLY NIA II I I l II r,F 6~

PH 0~:: * -"-( ::::.8 0"'-4..c.).,,__3.,_5.,_7,-=..3;J..,11,.<g~1+-J -----

0 t.

C,

e ATTACHMENT 1 SURRY POWER STATION, UNIT 2 DOCKET NO:

50-281 REPORT NO:

80-045/03L-0 EVENT DATE:

12-07-80 TITLE:

INOPERABLE CONTAINMENT VACUUM PUMPS

1.

DESCRIPTION OF EVENT

e On December 12, 1980, the annunciator alarm "Cont Partial Press -0.1 PSI Chl" was received.

This was assumed to disable only the automatic containment Va-cuum Pump functions therefore no urgent actions were taken.

At 0815, it was discovered*that neither pump could be operated and preparations were begun to ramp the unit down..

Simultaneously, a broken lug was discovered on Relay CV-101 A 8 and a jumper was installed to allow one of the pumps to operate.

The lug was subsequently replaced, the jumper removed and the circuit returned to normal.

Operation with Containment VAcuum Fumps inoperable is contrary to T. S. 3.15.B and is reportable as per T.S.6.6.2.b.(2).

2.

PROBABLE CONSEQUENCES AND STATUS OF REDUNDANT EQUIPMENT:

The relay, CV-101 A 8, when de-energized prevents operation of either Vacuum pump.

The annunciator for Containment Pressure "e.l PSI greater than Setpoint" was operational throughout the event, therefore the operator *would have been.

alerted to take action on any increasing Containment Pressure.

The health and safety of the public were not affected.

3.

CAUSE

A broken lug was found on the Relay Coil Neutral Lead.

4.

IMMEDIATE CORRECTIVE ACTION

A jumper was installed to bypass the failed Relay and allow the pumps to operate.

5.

SUBSEQUENT CORRECTIVE ACTION:

The broken lug was replaced, and the jumper removed.

6.

ACTION TAKEN TO PREVENT RECURRANCE:

A design change has been initiated to allow manual operation of the vacuum pump with a failure of the control circuit.

7.

GENERIC IMPLICATIONS:

None