05000293/LER-1980-057-03, /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

/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: 05000293/LER-1980-057, Forwards LER 80-057/03L-0 05000293/LER-1980-057-03, /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
References
LER-80-057-03L, LER-80-57-3L, NUDOCS 8009230739
Download: ML19338D775 (1)

LER-1980-057, /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

Event date:
Report date:
2931980057R03 - NRC Website

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 0 l@l4 l1 l1 l1 l 1 l@j l

lg 7

8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE Jo SI CAT sd CON'T

$OvRCs l L @l 0 l 5 l 0 l -._l 0 l 2 l 9 l 3 @l 0 l 812 l1 l 8 l 0 l@l0 l 9 l 1 l 9 l 8 l0 IOI1I 7

6 60 61 DOCKk: NUMSER 6R 69 EVENT DATE 74 75 REPORT DATE 80 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 drive pump was manually started and a maintenance request was immediately issued.

l I o l 51 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 Zl @

7 8

9 to 11 12 13 16 19 20 SECUENTIAL OCCURRENCE REPORT REVISION LE RiRo EVENT YEAR REPORT NO.

CODE

• YPE NO.

h RE l8 l0 l l-l l0 [5 l7 l l/l l 01 3 l lLl

[--J l 0l R

_ 21 22 23 24 26 27 3

29 30 31 32 K N AC O P NT M

7 HOURS 22 S8 FOR 8.

SUPPLIE MAN FAC RER l A l@l F l@

lZl@

l Z l@

l0 l0 l0 l0 l W@ d@

[y_j@

lG l 0l 8l 0l@

JJ 34 35 36 3/

40 41 42 43 44 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; of the three fluid drive pumps. Therelaywasreplacedandadesignchangeinitiatep

,,,,, l 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 li l s l W@ l 1 l 0 l 0 l@l N.A.

l l A l@l Operational Event l

CO0 TENT ACTiviTv RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE N.A.

l l

N.A.

l g l Zl @ l Z lgl 7

8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE

DESCRIPTION

N.A.

l y l 0] 0l 0l@ l Zl @ l PERSONN E L INJU IES NUMBER

DESCRIPTION

N.A.

l l0l0l0l@l i a 80 7_

8 9 11 12 LOSS OF OR CAMAGE TO FACIL1'Y Q l

TYPE D ESCRIPTION v

N.A.

l It191lZl@l 80 7

8 9 10 ISSUE @DE CRIPTION_aOi N.A.

l lllllllllllllf l

l.2,j,,oj 68 69 80 5 7

8 9 to QW~

i NAME OF PREPARER PHONE: