05000306/LER-1980-020-01, /01T-0:on 800715,during Severe Electrical Storm Several Breakers Operated.Main Generator Was Separated from Grid & Reactor & Reactor Coolant Pumps Tripped.Caused by Electrical Storm.Next Day Conditions Returned to Normal

/01T-0:on 800715,during Severe Electrical Storm Several Breakers Operated.Main Generator Was Separated from Grid & Reactor & Reactor Coolant Pumps Tripped.Caused by Electrical Storm.Next Day Conditions Returned to Normal

ML19330B466
Person / Time
Site:	Prairie Island
Issue date:	07/29/1980
From:	Hunstad A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19330B462	List: 05000306/LER-1980-020, Forwards LER 80-020/01T-0 05000306/LER-1980-020-01, /01T-0:on 800715,during Severe Electrical Storm Several Breakers Operated.Main Generator Was Separated from Grid & Reactor & Reactor Coolant Pumps Tripped.Caused by Electrical Storm.Next Day Conditions Returned to Normal
References
LER-80-020-01T, LER-80-20-1T, NUDOCS 8008040054
Download: ML19330B466 (1)

LER-1980-020, /01T-0:on 800715,during Severe Electrical Storm Several Breakers Operated.Main Generator Was Separated from Grid & Reactor & Reactor Coolant Pumps Tripped.Caused by Electrical Storm.Next Day Conditions Returned to Normal

Event date:
Report date:
3061980020R01 - NRC Website

text

CRC FORM 306 U.1. NUCLEA*3 f.EIULATORY COMMISSION (7 771 LICENSEE EVENT REPORT CONTROL BLOCK: l l

l l

l l

lh (PLEASE PRINT OR TYPE ALL REQUIRED INPORMATION) 1 8

f0Til l MI Nl P11 IN l 2 Ig 0101 -10 10101010 l_1010 Ig 4 l1 l 1 l 1l 1l@l l

l@

i 8 9 LICENSEE CODE I4 15 LICEPSE NUM8ER 26 28 LICENSE TYPE JO 57 CAT 58 CON'T l Ll@l 0 l 5 l 0 l 0 l 0 l 3l 0l 6l@l0 l 711 l 518 l O'l@l0 17 1219l810l@

RE O i 3U 7

8 60 68 DOCKET NUMRER 88 89 EVENT DATE 74 75 REPOR T ?) ATE 80 EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h O 2 l With Unit 2 at 100% power and Unit 1 at cold shutdown. a severe electrical storm 1

0 a l caused operation of several breakers in the substation.

At about 2030 the main

_l 0 4 l Renerator was separated from the erfd and rho ronnent and rancenr enninne nnmna l

l 10151 l trioned.

Natural circulation unn egenblinhed fnr enre ennling.

At thfm nnine run l l

O e i offsite nnuar i

i i_

At about i

enneroe ce<11 ov4cema e.

ee7,4_ rma uj mec, spec 3_7 ITI'Tl l 2338, No. 10 transformer was locked out and with oniv one off-site source remaining!

(a degraded one), the diesel generators started and closed in on the safeguards buses.

l0l8l l No safety injection ves actuated. Not repetitive.

No effect on oublic health l

7 8 9 safety.

SYSTEM

CAUSE

CAUSE COMP.

VALyg CODE CODE SUSCODE COMPONENT CODE SUBCODE SUBCO'E O

lElAlh W h W h l2lZlZIZlZlZlh h (Z_l h 0 9 7

8 9

10 11 12 13 18 20 SEOUENTIAL OCCURRENCE REPORT REVISION L

EVENT vEAR REPORT NO.

CODE TYPE N O.

@ y=ER,RO1810l L _l 10121 o f L_]

lo li I LT.]

l _]

LaJ a

._2 8 22 23 24 28 27 28 29 30 31 32 KN AC 0 PL NT ME HOURS

$8 1 P

8.

SU L MANUPACTURER Lx.J@l21@

LAl@

U@

l o l ol 1I iI Lsj@

ts_J@

1.2J@

l zl919 l9 l@

33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i O l Electrfeni nenrm.

Ar nhnne ??&o rho PT11 ennece une voetnrod nnA ne 7'410 Mn.

In I

i i itransformer was restored. At 0137 the next day conditions at the substation I

g l were nonnal.

l 3

l l

i 4 I

i 7

8 9 EO ST S

% POWER OTHER STATUS Dis O RY DISCOVERY DESCRIPTION lusj Laj@ l 01 ol ol@l MA l

b(lhlrnnern1 rnnm nnnuncintinn l

AaiviTv CaTE~T AMOu~TO,ACuvlTv @ l tOCATION OP RELEASE @

rue ASE@o OP REtEASEW@l Lz_l NA l NA l

1 6 7

8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE

DESCRIPTION

l 0l 0l 0l@[,Z,_jhl NA l

i 7

',ERSONNE'L i~;U4ES DESCRiPTiO~@

~uMSER 101 0l Ol@l NA l

i a 7

8 9 Il 12 80 i

l LOSS OP OR DAMAGE TO FACILITY Q l

TYPE

DESCRIPTION

v I

(_1j@l NA l

' 9 t

7 8 9 10 30

,SSUE @[ ESCR.,TIO~ @

08040 OS y "5"

ui l

l I l l l l l l l l l l l :;

[gj 2 O 7

8 9 10 68 69 80 E A A Hunstad 612-388-4767 0

NAME OF PREPARER PHONE:

h