ML19259B433

LER 79-003/03L-0 on 790102:increasing Containment Air Partial Pressure observed.1B Containment Vacuum Pump Motor Running,But Pump Not Turning Due to Seized Rotor on Pump

ML19259B433
Person / Time
Site:	Beaver Valley
Issue date:	02/02/1979
From:	Werling J DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19259B431	List: ML19259B430 ML19259B432 ML19259B433
References
LER-79-003-03L, LER-79-3-3L, NUDOCS 7902090331
Download: ML19259B433 (1)

Text

. . . . . . . . .. _ . . .

NRC FOR*' 46 U. S. NUCLEAR REGULATORY COMMISSION (7 77)

LICENSEE EVENT REPORT CONTROL 8 LOCK: l 8

l l l l l 6

lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

@ l 8P9 l A lLICENSEE 7

B l V CODE l S l 114l@l150 l 0 l- 0 LICENSE. l0 l0 Nuv l0eEl0R l- l0 [0 l@l4 25 26 l1LICENSE l1 l1TYPE l1 JOl@l$7 C Al T b8l@

CON'T IT'ITI [C], l L60@l 0 l 5 l 0 OOCK l 0 ET l 0NUMB l 3ER l 3 l 4 @l690 l 1EVENT l 0 DATE l 2 l 7 l 9 @l 0l 2l 0] 2l 7 l 980l@

1. 8 el t>d 14 75 REPORT OATE EVENT OESCRIPTION AND PROB ABLE CONSEQUENCES h ~

o 2 l At 0225 hours0.0026 days <br />0.0625 hours <br />3.720238e-4 weeks <br />8.56125e-5 months <br />, an increasing containment air partial pressure was cb::crved, even l

@ l though two containment vacuum pumps were in service. An investigation revealed the o 4 IB Containment Vacuum Pump motor was running but the pump was not turning. The 1 0 s l pur$p was de:.~ared inoperable at 0630 hours0.00729 days <br />0.175 hours <br />0.00104 weeks <br />2.39715e-4 months <br />. The redundant 1A Vacuum Pumn was l o s I operable and maintained the containment at the required subatmospheric condition. 1

[o TTI The pump was returned to service on 1/3/79. l O 8 l l 7 J 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SU8 CODE COMPONENT CODE SUSCODE SU8 CODE O 9 8

lS l A lh [g_jh l B lh lP lU lM lP lX lX lh Wh dj h 9 10 18 12 13 18 13 20 7

_ SEQUENTIAL OCCURRENCE REPORT REVtS10N e LER/RO EVENT YEAR REPORT NO. COD 6 TYPE NO.

M lo 13 l M

@ ,aEg yy (--J lo 10 12 l (--J (_0.]

. l31719l 22 23 24 26 27 28 23 30 31 32 N AC 0 ONP NT ME HOURS S 8 IT O FOR1 8. SUPPLIE MANUF CTURER LcJ@Lz.J@ zl@ 12J@ l 01 of of ol LN_J@ lyl@ A l@ nl 2191 s!@

33 34 35 M 31 43 41 42 g 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h E IThe incident resulted from a seized rotor on the nu-n. The numn was ren1nced l

, , with a new pump and tested successfully. l 2 I I EI I i 4 l 7 8 9 80 STA  % POWER OTHER STATUS 015 RY DISCOVERY OESCRIPTION i s (_E,J@ l 0 l 9 l 8 l@l N/A l W @l Operator observation l

' " " " 'S *a

' JTivity CORTE~T REuAsEO cP RELE AsE *uouNTOPACuviTv @ ' loc 47,0~ 0, mEisE @

i s M J @ L.i;J @ l N/A I "A 7 8 9 10 t1 44 45 80 PERSONNEL EXPOSURES NUM8FR TYPE D E SCRIPTION i T 1010l01@lzl@l"

N/A l

PE RsONN E L imu' ins NUM8ER cEsCRiPTiON@

i a 1010 Ol@l N/A l 7 8 9 it 12 30 LOSS OP OR DAMAGE TO FACILITv TYPE D E SCRIP TION i 9 U;j@l N/A l 7 8 9 to 80 2 o issui"@'0i?Ca l PnO~

N/A 790209033l'

@ l l l l l l l l l l l l l l :;

7 8 9 10 68 69 80. ;

~

NAME OF PRCPARER

• UN PHONE: ,