ML17332A454

Notifies of Chemical Cleaning of Sodium Hypochlorite Diffuser Piping

ML17332A454
Person / Time
Site:	Cook
Issue date:	11/30/1994
From:	Fitzpatrick E INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG
To:	Martin J NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
AEP:NRC:1208E, NUDOCS 9412050241
Download: ML17332A454 (4)

Text

PR.IC3R.I (ACCEI ERATED EY RIDS PROCI'.SSIXC REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9412050241 DOC.DATE: 94/11/30 NOTARIZED: NO DOCKET I FACIL:50-315 Donald C. Cook Nuclear Power Plant, Unit 1, Indiana M 05000315 50-316 Donald C. Cook Nuclear Power Plant, Unit 2, Indiana M 05000316 AUTH. NAME AUTHOR AFFILIATION FITZPATRICK,E. Indiana Michigan Power Co. (formerly Indiana & Michigan Ele RECIP.NAME RECIPIENT AFFILIATION MARTIN,J.B. Document Control Branch (Document Control Desk)

SUBJECT:

Notifies of chemical cleaning of sodium hypochlorite diffuser piping.

DISTRIBUTION CODE: IE23D COPIES RECEIVED: LTR 3 ENCL 0 SIZE:

TITLE: Environmental Event Report (per Tech Specs)

NOTES:

RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL PD3-1 PD HICKMAN,J INTERNA . FIL C ~TER 0 NRR/PMAS/ILRB OGC/FHD'S2 RGN3 EXTERNAL: NOAC NRC PDR NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE IRELP US TO REDUCE O'KSTE! CONTACTTHE DOC!'iIENTCONTROL DESK, ROOM Pl-37 (EXT. 504.00S3 ) I'0 I;Llh!INATE YOUR NAi!E I'ROTI DISTRIBUTION LIS'I'S I'OR DOCL'h,IL'N'I'S YOL'ON" I'I I;D!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 8 ENCL

Indiana Michigan Power Company P.O. Box 16631 Columbus, OH 43216 FI AEP:NRC: 1208E Donald C. Cook Nuclear Plant Units 1 and 2 Docket Nos. 50-315 and 50-316 License Nos. DPR-58 and DPR-74 CHEMICAL CLEANING: SODIUM HYPOCHLORITE DIFFUSER PIPING U. S. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555 Attn: J. B. Martin November 30, 1994

Dear Mr. Martin:

This notification is forwarded for your information pursuant to Appendix "B" of the Donald C. Cook Nuclear Plant Environmental Technical Specifications. The subject of this notification concerns chemical cleaning of our sodium hypochlorite diffuser piping. This cleaning is required due to calcium carbonate scale which builds up in the diffuser piping.

Due to industrial safety concerns associated with handling hydrochloric acid previously employed, we intend to use a less hazardous chemical, Betz "Deposit-trol 855D," to dissolve the calcium carbonate.

Approximately 40 ml/min of "Deposit-trol 855D" will be fed for six hours to each diffuser. A total of four diffusers require cleaning at this time. We intend to clean the plant diffusers (11 total) approximately two to three times per year to maintain sodium hypochlorite flow to our lake water systems. Sodium hypochlorite is used to control zebra mussel settlement in the service water systems and to control slime growth in the condensers.

The deposits removed by this operation, consisting mainly of sodium chloride, sodium carbonate, and calcium carbonate, will be released via outfalls 001 and/or 002. A dilution flow of at least 690,000 gallons per minute will be achieved. The final concentration at outfalls 001 and/or 002 will be 0.016mg/liter.

9412050241 941130 PDR ADOCK OS000315 P V PDR

/

Mr. J. B. Martin AEP:NRC:1208E As required by the Cook Nuclear Plant National Pollutant Discharge Elimination System Permit No. MI0005827, written notification of this process change was provided to the Surface Water Quality Division of the Michigan Department of Natural Resources on October 26, 1994.

Should you have any questions or concerns regarding this notification, please contact Dane Mazzitti at (614)223-2085.

Sincerely, 8F~~~g E. E. Fitzpatrick Vice President eh CC: A. A. Blind G. Charnoff NFEM Section Chief NRC Resident Inspector J. R. Padgett W. T. Russell, NRC - Washington, D.C.