ML20058K798

AO 75-3:on 750128,both Unit 2 Safety Injection Pumps Incapable of Starting on Automatic SI Signal from Approx 0900 to 100 H

ML20058K798
Person / Time
Site:	Monticello
Issue date:	01/29/1975
From:	Clarity R NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
75-3, NUDOCS 9102140414
Download: ML20058K798 (2)

Text

_

s

. - +. -

a REPORT OF ABNOR'LAL GCCURRE"CE 20. 75-3 On January 28, 1975, both Unit 2 Safety Injection Punps vere incapable of starting on :n autcratic SI cign:1 from appronizately 03C0 to 1100.

T!.e unit was operating at about 73% power thrcughout this time period.

Number 22 SI pump was racked out while a leak in the oil cooler was being repairec. humrer 21 SI prep vae tested for operability prior to r:chinr out.sunber 22.

However, frc= 0900 to 1100, Train A of the Safeguards Logic was under test as per conthly Surveillance Test STP-1032A, chich would have pr2 vented a Train A Saf ety Ejection actuctien.

l Throughout this time, the Centrol Roo: cperator rho was particiratine, in tnis surveillance test could have initiated a Train A Safety Injection by sinply pushing the test relay reset butten en the control ranel.

The operator was aware of the f act.

9102140414 750129 CF ADOCK 05000263 CF u

y,..-

=

.,o l

• * = = rae-, ee m,

.I lR u.e s.'

1.T***

4 i

M43W.U*dIT MdI $ @sh*'O C M

@".D fMD DC Os'-@ M8 NsEa~\\Il.T.

?.%..rn. %.u ma-Lv assus ** h-ws, v v f.,,

a..,m.,u.s %v. 7.e 3,a.y s

uL o.sux s.

IUt' IG:

o.e.- &%r. -

c o-o m1.as k.N.

twse

-b* *T hbN*

rd u ace:-Int;n.: w '. m TT1:

L"'.@9u.my-t @ t--r mx. OffJAat r w.,..w.. 1,.i -.....

.e,..

(

- me -,,,

/

.,w 0.'CD La.s, A., L.,s.

a.2.J-u o m.-*~...-

1.*.%..-.*er.'.*.

rv..,,

y s -rese-4

~.

n..

Im-,*c_;p a.. - < C e,

/*.m.. n.,., f.,. t.m. g...,,. '/ m.. ry 4%

t..., (, ~

pc. 3..,,,, w.p

• ~

.1. m.. t ; %

1.T:,q,. u... -*.:;.2. s,..~Y.,.e. u o. +...,.,*.-.,, _ r, -(.,,.,..,.,, % m...,., t,,

t a

w-.

...,..,............ ~.,

....,t....

s.s.t.< 4

..,.,.e...t..,

.~... _..

..6.....

s

,,G...._,....-.t

.t..

ra..,5 g. ~w'. y.

n..... r. a...

..r.n

g. w4.

r g

/

... u u, (.,

g

r. p.

t.,..s..,.~,, L..

~

..~,.,

.y_.., %... _. ~,,., -...

m,., z-. A e., c,--,

.t-j-.,.m,,,

e.,,

1.. L. &._...;,. y...,. a~?,.,-

n r'.-

p..,, 9., !... : f %.,...,,,,r,.,9r.ye,-..'.v..-'...=,

~..e..s,.,..p., * * *

• e..

g-., z.,.,, [ u%.

,(.,s,

..* g g~ n -

J

-a

. a s_

. w r.n.

s m.. 4

i..-~....

+-.,,e.y.

..-,. {....-.

• d' r

..a L..

.. +.

...i..-.

~.

, --n.

s.,' 4.3,.7 a n ' *,,,,,%.ou,. d. 1 )'.h,n,6,.,J.,.

y r =., y.... g. 4.~ 9 ~ts. 4y.g. y

--.e y.'e.,',. s..e 7,,3b..' Q' m

-. e.,

.nJ 1.'a...T.,.,._..%,;.c,..

C....

da,

~,,

w.

. 1

.s*% A.4 es w.

...em3 t.w.Jta, T.T # %,w. 4.ncs.,1... 4..

• • ....,%s Ju,

) e-d.,.

,.y. 7.,6

~...a...,.,.*L...,.;.J, s,

a a

h

.c a

u a

<-a.

s e

-s.-.

ry..e+1e.1 e.

-A.-

.q, o.,

.,.g L. % :....

6,.~-..=-.!.

. e' t

.~c-n m* 4e a.--

4 v

.y._.

.T

.M,., L..= d...Y.

1.b l 4 0.

-4 e.s

--...,..f.

J-'.,4.

k. -

1 I -.. ~d a s 4.~+..

.r.J...*.-

t

m..e e 9,

C *3N7" {**1*.E E *; P.'2 f* f't ** E NQ(f !* ~ C*O C'. !.d M M G ;'*'*. t M* C C*

• c"I*.O ' ff'Q*f '.,. Ie# (' M *D.'*C IIM.'C'+5 rc. 0;;,3i'.iin C.~.%d-e.

%er f.

)g 3

A

-3

• t o'

t j,

n

'in k's,+ s

,ed>

r p.,

,,..f.

W'-s,,,.

~ * '

^

e-

. p J"

.r.

, e e*

• w.

se:.

a".

1. m1., \\ =

H.*%. %p } y k%.

,%=

r _ p

.e ak - w.e,.

1' w..,.la...-a.%..,,

M. 'L d..

.er. 5 J" w,,,. _ ' L',

J.hs-.u a.e 1**d..'. a a..s.

u

~ < w.,3 E.'h r-CenI cc:- Dtkccwnw.- <.6 T,1&sL*.w.

I A'.w...,.

...-t,....+......c.

[..

fil. } # ' Y?* 7

.sf9 Eh9

.-.M..*

6

.e_n....

h e

O

.