ML17252B005

Letter Regarding a 01/03/1973 Conversation Concerning Dilution of Boron Solution in the Standby Liquid Control Tank - Dresden Unit 3

ML17252B005
Person / Time
Site:	Dresden
Issue date:	01/09/1973
From:	Worden W Commonwealth Edison Co
To:	Grier B US Atomic Energy Commission (AEC)
References
Download: ML17252B005 (2)

Text

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REGULATORY OPERATIONS, REGION III A. RO Inspection Report No.

Transmittal Date i .

Distribution: Distribution:

RO Chief, l{.T&OB or RO Chief, RCR RO Chief , M&FFB

• RO:HQ. (5) RO:HQ (4)****

DR Central Files L:D/D for Fuel & Materials Regulatory. Standards (3) * . DR Central. Files Lic;:ensing (13) .

B. RO Inquiry Report No.

Transmittal Date

• Distributio:i.: Distribution:

. RO Chief, ~:f::&OB or RO Chief, RCB (2_) RO Chief, N&FFB .

RO:HQ (5)

DR Central Files RO:HQ DR Central Files II Regulatory Standards (3)

Licensing (13)

I II I

c. Incident Notification From:

• . g:}c(:I Commonwealth Edison (Dresden 3) DPR.:..25 ()~--ZtJ.

(Licensee & Docket No. (or License No.) . I Transmittal Date January 9, 1973

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Distribution: *Distribution:

RO Chief, RT&OB or RO Chief,_ RCB RO Chief, H&FFB ..

RO:HQ (4) . RO:HQ (4)

Licensing (4) L:D/D fdr Fu~l & Materials DR Central Files DR Central Files

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SUBJECT:

D.P.R.-25 .

DRESDEN NUCLEAR POWE-R. STATION UNIT 3: *~ '

C. IH!S WILL CONFIRM A CONVERSATION WITH :MR* H. DANCE OF YOUR OFFICE* (

AT 1630 HOURS. JANUARY 3 CONCERNING DILUTION o'F BORO~ SOLUTION IN* ..*

(* THE STAND BY LIQUID CONTROL TANK. ON JANUARY :i.,3 AT 063L HOURS THE . ** . (

STAND BY LIQU.ID CONTROL TANK WAS SUPPOSEDLY P;LACED .ON* A IR .SPARGE::::*

c*.. THIS WAS DONE IN PREPARATION FOR A BORON SAMPLE TO BK TAKEN LA.IER ...... -. _

. '*-** -**-* -* . . ---- ., ~**--,~ .. -

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( >-:i:-120*1 ~Ji.-DAY. BY 0810 HOURS IT WAS REPORTED THAT THE TANK 11/AS OVER FLOWING

. 0 .. .- . . . . . . . . ...

\nAr:*VALUE CHECK ON THE SYSTEM DETERMINED THAT (lN ADDITION TO THE AIR SP .*

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ARGE ** ,. ,, .

( VAL.VE, A WATER FILL VALVE WAS ALSO OPEN. THE WATER FILLED VALVE WAS (

.CLOSED AND A BORON SAMPLE WAS TAKEN TO DETERMINE THE BORON'CONCENIRAT

( ION.

AI THE SAME TIME, IN ANTICIPATION OF THE CONCENTRATION BEING TOO LOW

( AN ORDERLY SHUT DOWN. WAS INITIAIED. . ...1 , * . .  ;.->' <:*::;. . ;r (  :

A DISCUSS ION WITH IHE PEOPLE: ON SHIFT REVEALED. THAT THE OPERATOR. ,  :*

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( . ERRORED IN VVALVING IN THE IANK FOR AiR SPARGE* .A. REVIE1.(;0F .* .... ** .* (

. *OPERATING. PROCEOURES WILL 8£ MADE .ro DET~RMINE' IF*~ REvi110N 'oR ..

( ADDITION CAN BE MADE TO ELIMINATE THE ~OSSIBILITY OF THIS SIIUATION F (

R0£1 RE- . . . . . *. . .

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SF-1201 OCCUR!NG. AT THIS TIME LOAD 15 BEING REDUCED AT THE RATE OF g (R5-69}

M~W.E. l PER .HOUR THIS LOAD DROP WILL c'oNTINUE UNTIL' EITHER THE. UNIT TS SHUT.

( DOWN OR THE BORON CONCENTRATION IS WIJKIN LIMITS SHOW~ IN FIGURE * (

3.4.1 OF TECHNICAL. SPECIFICATION

( W* Po WORDEN, SUPT~ (

COMMONWEALTH EDISON

.( DRESDEN NUCLEAR POWER STATION ( .

RT 1  : ' ...

MORRIS ILL (

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JAN 8 . 1S7J .. ,* *, ..