ML17339B215

Forwards Responses to Questions Re Proposed Installation of Condensate Polishing Demineralizers.Responses Suppl Info Previously Submitted in 800318 & 0527 Ltrs.Oversize Drawings Encl

ML17339B215
Person / Time
Site:	Turkey Point
Issue date:	07/22/1980
From:	Robert E. Uhrig FLORIDA POWER & LIGHT CO.
To:	Varga S Office of Nuclear Reactor Regulation
Shared Package
ML17339B216	List: ML17339B215 ML17339B217 ML17339B218
References
L-80-231, NUDOCS 8007280531
Download: ML17339B215 (7)

Text

REGULATORY DEFORMATION DISTRIBUTION S'i EM (RIDS)

ACGESSION NBR:8007280531 DOC DATE: 80/07/22

~ NOTARIZED: NO DOCKET FACIL:50-250 Turkey Point PlantP Unit 3c Florida Power and Light C 05000250 50"251 Turkey Point Plant< Unit 0i Florida Power and Light C 05000251 "AUTH~ NAME AUTHOR AFFILIATION Florida Power 8 Light Co.

REC IP ~ NAME RECIPIENT AFFILIATION VARGAPS ~ AD Operating Reactors Branch 1

SUBJECT:

Forwards responses to ques.tions re proposed inst'allation of condensate polishing deminerali.zers.Responses suppl info previously submitted in 800318 8 0527 ltrs Oversize ~

drawings erfcl, DISTRIBUTION CODE: A001S COPIES RECEIVED:LTR J ENCL SIZE: cP gZ TITLE: General Distribution for after Issuance of Opei ating Cic NOTES:

RECIPIENT COPIES RECIPIENT COP I E'S ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCI ACTION: VARGAgS ~ 05 1 1 GROTENHUISg M 12 12 INTERNAL: D/DIRPHUM FAC S 1 1 DIRRHUM FAC SFY 1 1 ISE 12 2 2 NRC PDR 02 1 1 14 1' OR ASSESS BR 19 0 REG F ILE 01 1 1 EXTERNAL: ACRS ?0 16 16 LPDR 1 1 NSIC 00 '1 1 f'p/C l /b PDR 1 PDR 7688 2S ~~~

pe TOTAL NUMBER OF COPIES REQUIRED: LTTR 39 ENCL

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+Illy FLORIDA POWER & LIGHT COMPANY July 22, 1980 L-80-231 Office of Nuclear Reactor Regulation Attention: Mr. Steven A. Varga, Chief Operating Reactors Branch 1 U. S. Nuclear Regulatory Commission Washington, D. C. 20555

Dear Mr. Varga:

Re: Turkey Point Units 3 and 4 Docket Nos. 50-250 and 50-251 Steam Generator Re air Attached you will find Florida Power 8 Light Company's responses to the questions regarding the proposed installation of condensate polishing demineralizers at Turkey Point Units 3 and 4, which were transmitted by Mr. Marshall Grotenhuis of your branch on June 16, 1980. These responses supplement information previously submitted in our letters of May 27, 1980 and March 18, 1980, to Mr. A. Schwencer.

Please notify us if you require further information.

Very truly yours, obert E. Uhrig Vice President Pool Advanced Systems 8 Technology 5 REU/LFR/ah i/z CHC'/ 7o.

Attachments PDR cc: N. A. Coll, Esquire L.PD/2 H. F. Reis, Esquire 7+I& (R&)<<lay '4 ~+~ I- /F3

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'ESPONSES TO: DENINERALIZER QUESTIONS FOR FLORIDA POWER & LIGHT COMPANY TURKEY POINT UNITS 3 AND 4

1. Q: Provide a general description and flow diagram of how the full flow condensate demineralizer operates. Indicate the number of deminexalizer vessels per unit.

A: The condensate polishing demineralizer system is of the Powdex type and consists of the following sub-systems for each unit:

e Filter/Deminera1izer o Precoat e Spent Resin Handling The filter/Demineralizer sub-system consists of four 1/3 capacity filter/

,demineralizer vessels, each with an individual hold pump, and an individual flow control valve. The filter/demineralizer vessels contain the resin and/or filter media. The hold pumps maintain the minimum condensate flow that is required for proper resin and/or filter media retention. The individual hold pump loop for each vessel can be isolated fxom the main condensate system. The flow control valves for the sub-system maintain an even distribution of the condensate flow through all on-line units.

All foux filter/deminexalizer units are piped in parallel.

The precoat sub-system is used to place resin or filter media charges into the filter/demineralizer vessels.

The spent resin handling sub-system consists of a pressure filter, dewatering'ilter, valves instruments and controls. The system is used for dewatering and filtration of resin slurries.

During normal operation three vessels in parallel are used at the design flow rate. The fourth vessel is a,standby unit.'n audible alarm is annunciated when the pressure differential across the unit'eaches a pre-determined but adjustable value, high sodium content, or when the effluent conductivity indicates ion exchange capacity exhaustion. Upon the annun-ciation of this alarm, the standby filter/demineralizex vessel is placed in service by remote manual push button, and the exhausted filter/demin-eralizer vessel is removed from service. The exhausted vessel can be either placed in the "hold" mode 'for testing to confirm exhaustion, back-washed and left clean without a precoat, or backwashed, pxecoated, and placed in the "hold" position as a standby.

For a detailed description, see attached condensate polishing system flow 5177-088-M-' and system description 5177-088-M-l. ' 'iagram

2. Q: Xndicate the anticipated frequency of back flushing and Powdex replacement for each demineralizer vessel. Describe how such an operation would be scheduled for the two units. Describe how run time will be determined.

A: Based upon the influent water quality and desired effluent quality, the condensate polishing demineralizex system will .have an approximate run time of 2-3 weeks-The run time is determined based upon built up suspended solids and ion-exchange capacity exhaustion.

During one unit, operation with three operating vessels (Unit 3 or 4), the backwash cycle would average once per week. Vith both units in operation (Unit 3 and 4), the backwash cycle would average twice pex week.

3. Q: Xndicate the source and water quality of the backflushing liquid'.

A: The source of water used for backflushing is from a condensate 'quality demineralized water storage tank. The flushing - water wi'l normally have the following analysis:

Cation conductivity at 25 C micxomhos/cm 2.00 Total solids, ppm < 0.50 Fluoride, ppm ~ 0.15 Chloride, ppm < 0.15 Suspended solids, ppm < 0.10 Sodium, ppm 4 0.10 Free hydroxide, ppm < 0.10 pE 7.0-8.0 Silica g ppm 0.20 Par ticulates Filtered to less than 25 microns Dissolved oxygen, ppm 4 0.08 Dissolved carbon dioxide, ppm K 2.00 Provide the volume of dischaxge from the demineralizer vessel to the receiving vessel.

. A: 'The volume or" discharge from the demineralizer Vesse1 to 'the backwash receiver tank is approximately 6,350 gpm per bacIaiash.

5. Q: Provide the anticipated water quality values for pH, suspended solids, and conductivity of the supernatant discharged from the r'eceiving vessel

.to the discharge canal.

A: The water quality of the supernatant discharged from the spent resin handling system to the discharge canal will usually exceed that of the canal. water.. The following:are anticipated typical values:

pH 8.5-8.7 Conducti vi ty mi cromhos/cm 1.0

5. ( Continued ) Values for total suspended solids will normally be within low volume waste source limits, and are expected to be significantly lower than those limits.

6. Q: Indicate the anticipated type (batch or continuous) volume, and flow rate of the discharge.

A: The spent resin handling system is designed for batch type operation. The system is designed to handle 6,000 gpm in 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br />.

,7- Q: Indicate the approximate location of the discharge point on a site map (line drawing of discharge).

A: See attached drawing 5610-C-2.

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