ML20050A000

Ro:On 820314,low Pressure Safety Injection Pump Lost Due to Air in Pump.Pumps Vented & Shutdown Cooling Restored. Investigation in Progress.Results Will Be Forwarded w/14-day Rept & Two LERs

ML20050A000
Person / Time
Site:	San Onofre
Issue date:	03/15/1982
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
NUDOCS 8203290528
Download: ML20050A000 (1)

Text

. _ _ _ _ _ _ _ _ _ _ _ - - _ _ _ _ _ _ _ _ _ _ _ _ _ .

m p U f  % O O '

9 c> x'.g sc '

SqutherQCalifornie Edison Company

~

g ,

j . (.g g -

saw oworns NucLean osusnatino svariou

~ - n ... ... g, y} Y ,% # p\ M 3 .

saw cLauswis. catir$nwin .asta H. _ A, f . , g g g ,[g g .

l '

"ano* a ae m 4 ,

.C e -

,, i.,c.,.,,..

!  ; < March 15, 1982 " m n

c. . ( N

$ e q

• i,  % j a 5

- A i .. . co 6 ,

! U. S. Nuclear Regulatory Commission -

3* -

Office of Inspection and Enforcement '

$ ' %p

• Region V '

A 7 rp 1450 Maria kano, Suite 210 4 .-

" " b

Walnt* Crook, California 94596-5,368 ,

j a . - - ,  ; , .=

l l

• 9 Docket ho. 50-361

• J San Onofre Unit 2 i .

4 ..

Attention Mr. R4 II. Engolken, Director .

i

)

! Donr Sir: .-* ,

• ~

j - ~

a ,  ! ,

This lotter,describos a reportable occurrence involving .

]t the Shutdown Cooling System. 'This submittal is in accordance -

g i with the reporting requirements stipulated in Sections 6.9.1.12.b ,

! and .d of Appendix A to the Provisional Operating License NPF-10.. o 1

With the reactor in Modo 6'on March 14', 1982, the control e i oporator observed'that shutdown cooling via a Low Pressuro Safety- ,

Injoction pump had boon lost due to air in ttw pump. Th'o other The pumps werb vented

~

! pump was started ancWalso became air-bound. ,

and shutdown cooling rostored in'ninoty,(90) minutos. )

Asaronuitofthisinh'identHCSboronwasfoundtohavo I droppod fron 2004 to 1962 ppm. This resulted in a positivo reactivity  ;

innortion of 0.64% dolta K/K. The nourco of this reactivity i inmortion in unknown at thin timo. Technical Specifications requiro boron concontration to bo maintained abovo 1720 ppm.

l bona of shutdown cooling capability did not result in a  !

I reduction of plant safoty becauno thoro was no irradiated fuol ing j the coro.  !

An investigation in in progrona and the renulta of thin review  :

will be forwardod to you with our 14 day report toqother with two i

1.tconnco r,vont Hoporta.

I

! #incoroly, ,

I l fo 4- f a, chu foo w m e nonia ng innpoetori- -

,p(vdI 1

i coi l i p i

pur*9h -

i