ML20056B711

Ro:On 720124,during Cold Startup,Reactor Achieved Criticality at Earlier Point in Control Rod Sequence than Had Been Predicted.All Control Rods Fully Inserted & Reactor to Remain in Cold Shutdown Condition

ML20056B711
Person / Time
Site:	Monticello
Issue date:	01/25/1972
From:	Larson C NORTHERN STATES POWER CO.
To:	Grier V NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 9102080408
Download: ML20056B711 (1)

Text

.

I

{%4u'{.]_

32.

UC f

p

.1

gig,

-9 N'O M T H E R N 'dTATES POWER CO M'?ANY

['

u nticello thclear Generatins Plant o

tboticollo, Minnesote gr,36?

t t

I, January 25, 1972 d

i Vr. B.syce Grier llecion Iil Co:pliance Office 799 Rooseve)4 Road f len Ellyn, 11)inois 60137 t

ibar t/r. Grier:

1/onticello loelear Generating T' lent Ibckci Ib.10-263 - License 16. IN22 Npor t ing O f Decur t enr.e Dn J.snuar y 24,19??, dering a cold :;tartup of tro 1.bnticellu ihr: lear Geneemt.'r g Plsnt, lie ree::In: echieved critir.nlity si sn earlior point in mottui rod w-qsc,nco A than had bocn predicted.

All wntrol rods were then fully innected, lhe reactor will tornin in he cold shutcban condition until the reason Ihr ibie j

annmaly is undercinnd and iis si nificance has boon determined, E

i

~ ' Very' i ruly yourt.;,

.?

/?

G (C.. t ~raA<%

'\\

V C. E. I ar son Plant Superintendent CEl/kik c c; 1H Clerity IO buncannon

_l

i 10 Wyer AL Kard "l

filo

- i 1

1 I

?l lI 9102080400 720125

??

CF ADDCK 05000263i.

f CF fj "i

I Qp A lf7.2

^

.