ML19274E782
| ML19274E782 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 04/18/1979 |
| From: | Mcgaughy J MISSISSIPPI POWER & LIGHT CO. |
| To: | Ballard R Office of Nuclear Reactor Regulation |
| References | |
| AECM-79-28, NUDOCS 7904240404 | |
| Download: ML19274E782 (2) | |
Text
-
1-1 MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mi3sissippi P. O. B O X 16 4 0, J A C K S O N. MISSISSIPPI 39205 paooucrio~ ot m a r u c ~T April 18, 1979 Director of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Attention:
Mr. Ronald L. Ballard, Chief Environmental Projects Branch No. I Division of Site Safety and Environmental Analysis
Dear Mr. Ballard:
SUBJ ECT : Grand Gulf Nuclear Station Units 1 and 2 CPPR-ll8 and CPPR-119 Docket Nos. 50-416 and 50-417 File 0260/15970/15983 Transmittal of Flush Disposal Procedures AECM-79/28 Attached is a brief description of our flushing operations and as-sociated disposal procedures for flush discharges.
Flushing operations are scheduled to begin in mid-1979. This information is submitted as required by Staff Exhibit 2-A referenced in subsection 3.E.1 of Appli-cant's Construction Permit No. CPPR-ll8 and CPPR-Il9.
If you have any questions, please advise.
Yours truly, g J. P. McGaughy, Jr.
Director of Power Production LSD:mt Attachment cc:
Mr. Troy B. Conner, Jr. (w/at tachment)
Mr. R. C. Travis (w/ attachment) k
\\
7904240 Y Member Middle South Utilities System
N*
Fl.USl! DISP 0 sal.
The estimated flush discharge for Grand Gulf Nuclear Station Unit 1 is between 10-20 million gallons over the time period of mid-1979 thourgh mid-1980. We plan to direct the following discharges to either or both existing sediment retention basins.
1.
Flush effluent supplied from a demineralized water source will be 70% or greater of the total flush disposal.
2.
Flush effluent from system process fluid (system water) will compose 20-30%.
3.
I.ess than 10% of total discharge will be treated with hydrazine (50 ppm or less) using a demineralized water source.
Discharge f rom t he sediment retention basins will be less than.5 ppm.
Since this concentration of hydrazine is theoretically capable of removing an equal concentration of dissolved oxygen, the effect of the dissolved oxygen content of the water discharged from the basins is negligible.
4.
The largest single discharge should be less than 1.5 million gallons of demineralized water over a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period.
5.
Other large discharges - 400,000 gallons from a demineralized water source at approximately 120"F over a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> period.
Excess heat will be rapidly dissinated within the basins prior to discharge.
6.
A;> proximately 1500 gallons of tri-sodium phosphate at a con-centration of less than 100 ppm will be used as a wipe-down solution for the reactor pressure vessel prior to flushing.
The discharge from the basins will only contatu a trace amount of tri-sodium phosphate.
The Mississippi Air I. Water Pollution Control Conenission has designated the discharges from these flushing operations as "preoperational metal cleaning vastewater" and has applied limitations on the effluent accordingly.