ML20090C455

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AO-75-032:on 751117,acid Leak Occurred in Makeup Demineralizer Acid Storage Tank.Caused by Partially Open Discharge Valve.Valve Repaired
ML20090C455
Person / Time
Site: Nine Mile Point Constellation icon.png
Issue date: 11/28/1975
From:
NIAGARA MOHAWK POWER CORP.
To: James O'Reilly
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20090C453 List:
References
AO-75-032, AO-75-32, NUDOCS 8302180080
Download: ML20090C455 (2)
v • d • e


Text

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Conditions Prior to Occurrence:

Steady State Power Routine Shutdown liot Standby Cold Shutdown Load Changes X

Refueling Shutdown Routine Startup Other Description of the Occurrence:

During shutdown for refueling, an acid leak was experienced in the Make-up Demin. acid storage tank.

During neutralizing, the \\ lake-up Demin.

Regen. Waste Tank, the discharge valve to the lake (BV-69-0,5), was foun'd partially opened and resulted in approximately 16,000 gals, of (pils 12.4 and high SO content) water being inadvertantly discharged to the lake.

4 Apparent Cause of the Occurrence:

Design Procedure Manufacture X

Unusual Service Condition Installation /

Const.

Operator Component Failure Other (Specify)

Analysis of Occurrence:

It is estimate,d that the p!I in the discharge canal during this dis-charge would be a maximum of 9.1, it was probably less than this since a small amount of acid was added after the last pil reading of 12.4 was taken on the tank.

The S0;2 concentration in the discharge canal is estimated to be 17 ppm above the ambient concentration of approx. 30 ppm.

It is felt that the above leecls would not have had a significant in. pact on the 1ake water environment since the lake ambient conditions vary from pli 7.2 to pli 9.1 and 13 ppm to 50 ppm for S0;2 based on data in the Nine Mile Point Environmental Report.

Corrective Action:

Valve was repaired and should not allow this incident to occur.

8302180000 00 0

PDR ADOCK 0 PDR S

Failure Data:

None

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\\v' NIAGARA MOHAWK POWER CORPORATION NIAGARA MOHAWK DATE:

November 28, 1975

SUBJECT:

Abnormal Occurrence Report No. 50- 220 75-32 (10 Day Letter)

The enclosed Abnornal Occurrence Report is being submitted in accordance with Technical Specificatien Section 6.

TO:

James P. O Reilly Directorate of Regulatory Operations Region 1 631 Park Avenue King of Prussia, Pa.

19406-FROM:

Niagara Mohawk Power Corporation Nine Mile Point - James A. FitzPatrick Site P.O. Box #32 Lycoming, New York 13093 Docket No. 50- 220

REFERENCE:

License DPR-63 Report No.: 50 220 /75 32 Report Date: 11/28/75 Occurrence Date:

11/17/75 Facility:

NY NMP #1 Identification of Occurrence:

Specification level of ETS 2.33 and 2.34 cxceed on SO and pil 4

(Tabic 2.5-1).

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. NIAGARA MOHAWK POWER CORPORATION mAoAna @ wonAwg

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DATE:

November 17. 1975 M.

St33 JECT:

Abnormal Occurrence Report No. 50- 220 75-31 (24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Motification)

The enclosed prelinir. cry ADR is being submitted in accordance with Tecimical Specification Section 6.

Confirming _

T.J. Perkins phone conver ation with T. Shed iosky AEC RO:I office on.

Novenber 14, 1975 TO:

James P. O'Reilly Directorato of Regulatory Operations Region I 631 Park Avenue

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King of Prussia, Pa.

19406

.1

. FRCM:

Mitgara l'ohawk Po r Corporation

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Kine !!ile Point - Janes A. Pit::Putrick Site

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NBAGARA. MOHAWK POWER CORPORATION 3

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November 18. 1975 SUEJECT:

Abnormal Occurrence Report Nc. 50- 220 75 _ 32

.1 (24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Notification) g.1 s

The enclosed preli$inary AOR is being submitted in 1

i acco dance with Technical Specification Section 6.

-I~

Confirming T.J. Perkins phone conversation with Mr. Gallina AEC RO:1 office on

?

11-18-7S l.

I' ' sa r.:

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TO:

James P. O'Reilly Directorate of Regulatory Operations

..I 631 Park Avenue Region 1

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'. ~ i.

Kits of Prussia, Pa.

19406 1,

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'h FRON:

Hiagara Hobswk Power Corporaticn

'l7}I Mine Mile Point - James A. FitzPatrick Site M

P.O. Box #32

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-ts Ircoming,!!ew York 13093 s

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Docket No. 50- 220 e

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REFERENCE:

License DPR -

63 1.., c. I y

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3..-.' i Report No.: 50- 220 (75-32 H"*-

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Report Date

+1-18-75

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.41-Occurrence Date 11-17-75 i

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'f Facility:

NY PNP *1

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Identification of Cccurrance:

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specification level or ETs 2.33 & 2.34 exceed on so 6 pit (Table 2.3-3) 4 r

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Conditions Prior to O

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Occurrence:

Steady State Pever

' P.outina Shutdown

~

Hot Standby

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Cold Shutdown tma Chu.gos X

Refueling Shutdowa

~

Routino Startup

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4..

Description of the Occurrcsca:

Durine shutdown for refueline, an acid leak was experienced in the Make-U Deciin. acid storage tank. During neutralizing, the Make Up Deoin. regen. wasth

=

tank, BV-69-05, was found failed partially opened and resulted in approx. 16,000 gals, of (ph +12.4 and high SO content) water being inadvertantly discharged to the 4

lake.

". l Apparent (*muso of the Occurrence:

r Design Procedure '

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Hanufacture x

. Urzasual Service Conditica.

Installation /

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Operator Carponent railu s v

other (specify)

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Analy' sis of Occurrence:

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Presently under imiestigation.

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,V Corrective Action:

4 Yalve will be repaired 2

Failure Data:

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