ML19338D775

LER 80-057/03L-0:on 800821,fluid Drive Pump Tripped & Backup & Emergency Oil Pump Did Not Start.Caused by Coil Burnout on 125 Volt DC Agastat Relay Model #2412.Relay Replaced & Design Change Initiated

ML19338D775
Person / Time
Site:	Pilgrim
Issue date:	09/19/1980
From:	Marjorie Mclaughlin, Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19338D765	List: ML19338D764 ML19338D775
References
LER-80-057-03L, LER-80-57-3L, NUDOCS 8009230739
Download: ML19338D775 (1)

Text

wwau _

(7 77)

LICENSEE EVENT REPORT CONTROL BLOCK: l l l l l l lh (PLEASE PJlNT OR TYPE ALL REQUIRED INFORMATION) lo lt l l Ml Al P l P l S l 1 l@l 0 l 0 l- l 0 l0 l 0 l 0 l 0 l- l0 l 025 l@l4 26 l1LICENSE l1 l1TYPE l 1 Jol@j SI CATl sd lg 7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER CON'T IOI1I $OvRCs l L @l 0DOCKk: l 5 lNUMSER 0 l -._l 0 l 2 l699 l 3EVENT 6R

@lDATE0 l 812 l1 l 8 lREPORT 74 75 0 l@l0DATE l 9 80 l 1 l 9 l 8 l0 7 6 60 61 EVENT DESCRIPTION ANo PR3BABLE CONSJOUENCES h lol2l l On August 21, 1980, at approximately 2110 hours0.0244 days <br />0.586 hours <br />0.00349 weeks <br />8.02855e-4 months <br /> the Reactor Recirculation Pump l lol3i l P201A Motor Generator Set tripped. Investigation revealed that the fluid drive l 10 t 4 l l pump tripped and the backup and emergency oil pump did not start. The backup fluid l I o l 51 l drive pump was manually started and a maintenance request was immediately issued. l 1 O 16 I l A faulty control relay was replaced and the Recirculation Pump P201A returned to l l o l 71 I service on August 22, 1980 at 0355 hours0.00411 days <br />0.0986 hours <br />5.869709e-4 weeks <br />1.350775e-4 months <br />. l I

1 o la 1 I O E COCE SUSC DE COMPONENT CODE SLBCODE SU ODE lo19l 'l C l B l@ l E j@ l A l@ l Rl El Ll Al Yl Xl@ l Ml@ l 20Zl @ 16 19 7 8 9 to 11 12 13 SECUENTIAL OCCURRENCE REPORT REVISION EVENT YEAR REPORT NO. CODE *YPE NO.

LE RiRo h RE R l8 l0 l l-l l0 [5 l7 l l/l l 01 3 l lLl [--J l 0l 22 23 24 26 27 3 29 30 31 32

_ 21 K N AC O P NT M 7 HOURS 22 S8 FOR 8. SUPPLIE MAN FAC RER lJJA l@l34F l@ lZl@

35 l36Z l@ l0 l0 l0 l0 l 3/ 40 W@

41 d@

42

[y_j@

43 lG 44 l 0l 8l 0l@

47 CAUSE DESCRIPTION ANC CORRECTIVE ACTIONS

-li lo l l Investigation revealed that the coil of 125 volt DC Agastat relay model #2412 l

,, ,, , l burned open. Control circuits af fected by failure of this relay inhibited operation;

,, ,,, l of the three fluid drive pumps. Therelaywasreplacedandadesignchangeinitiatep to eliminate this common mode failure circuitry. ,

g I

t i l 41 1 80 7 8 9 STA  % POWER OTHER STATUS DISCO RY DiSCOVE9Y DESCRIPTION N.A. Operational Event l li l s'l *W@ l 1' l 0 l 0 l@l l l A l@l ACTiviTv CO0 TENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE N.A.

g l 8Zl9 @ l Z lgl 7 10 11 N.A.

44 l l 45 80 l

PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION y l 0] 0l 0l@ l Zl @ l N.A. l PERSONN E L INJU IES NUMBER DESCRIPTION N.A.

7_

i a 8 9 l0l0l0l@l 11 12 l

80 l'

LOSS OF OR CAMAGE TO FACIL1'Y Q TYPE D ESCRIPTION v N.A. l It191lZl@l 7 8 9 10 80 l N.A. lllllllllllllf l.2,j,,oj ISSUEl @DE CRIPTION_aOi l 68 69 80 5 7 8 9 to QW~ ,

i NAME OF PREPARER PHONE: