05000278/LER-1980-008-01, /01T-0:on 800305,while at power,E334 Load Ctr Was Shed Automatically Due to Loss of Site Startup Source,But Failed to Recover Automatically.Caused by Agastat Time Delay relay,Model7012PC,not Picking Up on Restoration

From kanterella
Revision as of 00:34, 1 January 2025 by StriderTol (talk | contribs) (StriderTol Bot insert)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search
/01T-0:on 800305,while at power,E334 Load Ctr Was Shed Automatically Due to Loss of Site Startup Source,But Failed to Recover Automatically.Caused by Agastat Time Delay relay,Model7012PC,not Picking Up on Restoration
ML19322E579
Person / Time
Site: Peach Bottom 
Issue date: 03/19/1980
From: Cooney M
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19322E578 List:
References
LER-80-008-01T, LER-80-8-1T, NUDOCS 8003280435
Download: ML19322E579 (1)


LER-1980-008, /01T-0:on 800305,while at power,E334 Load Ctr Was Shed Automatically Due to Loss of Site Startup Source,But Failed to Recover Automatically.Caused by Agastat Time Delay relay,Model7012PC,not Picking Up on Restoration
Event date:
Report date:
2781980008R01 - NRC Website

text

l HC FOHM %(,

U. E NUCLE All itLGUL Al 016 V COMMISS60N vil9 bnit 3 LICENSEE EVENT REPORT Heport No. 3-80-8/1T-0 t, em CONTROL SLOCC l l

l

\\

l l

(PLE ASE PRINT OR TYPE ALL REQUIRED INFORMATIONI o l1l lP l A lP lB lS I 3 !@It 0l Ol10 lOlOlOlOl-lOlOl@l4l1l1l1l1lhl I

lh 5 9 lac 5h&EE COOE i4 license NvusER 26 26 LICENSE TYPE JQ

$7 CAT be i

' ON T aIiI

  • ",ILl@l0l5101-lOl217 18 @l 0 l 31015 l 8 l 0 l@l0 l311 l9 I8 10_j@

s uRC 5

60 6.

OOCKET NUMSER Gu i'9 EVENT DATE 74 7%

REPCRT DATE do l

EVENT DESCRIPTION ANO PROBA8LE CONSEQUENCES h M 121 l While at power, E334 Load Center was shed automatically due to loss of I

l no I : I l Unit 3 startup source but failed to recover automatically. Failure was l

l a I4 I I observed by loss of power to 'A' core spray syRtem valves. The 'A' l

'e i b I I T. PCT system had been declared inocerable at the time (T_ER 3-80-03/3L)

I o go l l E334 breaker was inanediately reclosed from the control room.

'A' core g

l gl spray system valves were without power for less than 2 minutes. The

'B'

[

i l

core spray and 'B' LPCI systems were operablo during this event.

]

lo 1e 1 i gg 80 I

SYSTEM

CAuSE

CAust COMP.

VALVE COOE CODE susCODE COMPONENT COOE sWSCODE susCOOE 0191 1 E lB lh {_Ejh [B_j h lR lE lL lA lY lX lh Wh W h io is i2 i3 i.

i.

2o sEOUENTiAL OCCURRENCE HEPOfiT H EVisiON I

L EVENTVEAR REPORT NO.

CODE TYPE NO.

h,a=E R/Ro18101 L-J.

lo lo ls I l-l D 11 1 IT I l-1 Lo_J 2

22 23 24 26 2d 28 29 3o 35 32

^"E"Tvio'

,sh.

'"s!",',5W of "IfNUn'ER n '# # 'X TY s OL'!Lf,!T 50"E#a" l0 l0 l0 @l0 l uOuns M@[Z._jh L.Z_,j@

Wh y@

lYl@

W@

l A l1 l0 l9 l@

JJ 34 3a 3G 31 40 49 42 43 44 di CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h Ml Agastat time delay relay, Model 7012PC, did not pick up on restoration l

El of 4KV oever which orevented the E334 breaker from reclosinm The ratav I

,, l was replaced and tested. Previous occurrence on 12/20/77 LER 3-77-62/1T.

I li I il I I

i 4

I I

s cg 80

's*T2$*

OTw;RsTATus h DisEOYaRY seOwER OisCOvtRy OEsCa:PTiON l i I ', I [E,,jh l 1 l0 l 0 l@l NA l

l A lhl Alarm Annunciator l

ACTIV17Y CO TENT AucunTOs ACTIVITY h l LOCATION Op RELEASE h RELEAsEn OP nELEAsE W (_Z,_] h l_Z,j@l l

NA I

NA i

a o io si 44 46 so PERbONNEL EXPOSURES NUMWER DESCRIPTION -

[ i l i l l 0 l 0 l 0 lhlTYPEZ lhl NA l

,ERsON~E L iN,U4 Es OEsCR PTiON@

Nu ER lilal10l0l0l@l NA l

d 9 i.

12 80 LO%S of Oei UAMAG.E TO FACILITY 8003'lBU+35 im i,Lmi... ion b,i"Il.y,_l@l NA l

i.,

e ruulici,Y NHC USL ONLY 4,'

'/

OkKHiPTION

@ i..uEn[N_[hl i

NA

/-rf l

l!lIliIIIlIlI*:

y cs o ao s i.,

io

. oSnnev (215) 841-5020 g

o NAME Ol: PREPARER 9