ML19320C712

Forwards Response to NRC 800630 Ltr W/Questions Re Secondary Water Chemistry Control Program.Fsar Amend Will Be Filed in Aug 1980

ML19320C712
Person / Time
Site:	Summer
Issue date:	07/14/1980
From:	Crews E SOUTH CAROLINA ELECTRIC & GAS CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
Shared Package
ML19320C713	List: ML19320C712 ML19320C715
References
NUDOCS 8007170607
Download: ML19320C712 (16)

Text

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SOUTH CAROLINA ELECTRIC a gas CoHPANY cost errece me. 7..

CoLuMe A, South CAROLINA 29218 E.H. Ca rws, J n.

wer Persion.' .e Gaou* E=ecums c .. ... co.==. July 14, 1980 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, D. C. 20555

Subject:

Virgil C. Summer Nuclear Station Docket No. 50-395 Secondary hater Chemistry Control Program

Dear Mr. Denton:

South Carolina Electric and Gas Company, acting for itself and as agent for South Carolina Fublic Service Authority, herewith files five (5) copies of the response to questions transmitted in Mr. Schwencer's letter'of June 30, 1980 regarding the seconda water chemistry control program for the Virgil C. Summer Nuclear Stati, . FSAR amendment incorporating these re-sponses will be filed in Augus , l' ,80.

t Very ly yours, i

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)p E. H. Crews, Jr.

EHC:RBC:jw CC: Messrs. H. T. Babb G. H. Fischer W. C. Mescher W. A. Williams, Jr.

W. S. Murphy T. B. Conner T. C. Nichols, Jr.

Bret Bursey O. S. Bradham NPCF/Dixon -

File l 8007170 N .

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e SECONDARY WATER CHEMISTRY CONTROL PROGRAM FOR VIRGIL C. SUMMER NUCLEAR STATION S

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• Question 1: Attachment I, Daily Chemistry Report, of your submittal provides the limits for.the critical parameters and'their sampling schedule only for. normal operation, and indicates that the limits of the critical parameters. for. secondary water chemistry control are available under plant conditions other than normal operation.

Provide a summary of the limits of these parameters and the sampling schedule for plant startup, hot standby, hot shutdevn/

cold wet layup conditions.

Response: Provided as Enclosure 1 is a draft copy of ATTACHMENT II to plant procedure CHP-613, " Steam Generator Chemistry Control".

Along with explantory-notes, it provides sampling and specifi-cation requirements for all steam generator conditions.

Summarized steam generator operating conditions to simplify the form are provided, however, all limits and conditions are condlatent with Table 7-2 of the " Steam Side Water Chemistry Control Specifications", January 1975, Westinghouse.

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Question 2: On page 1~of Attachment.I, the limit for free OH 'in the steam generator blowdown is listed as 1.5 ppm. Justify why this limit is over 0.15 ppm OH .

Response: The limit of 1.5 ppm for free OH is a typographical error.

The correct limit is .15 ppm.

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Question 3: Provide the critical parameter limits and sampling schedule for condensate under normal operation, startup, hot standby, hot shutdown, and cold shutdown / cold wet layup conditions.

Response:- Provided as Enclosure 2 are draft copies of ATTACEMENTS I an'd II of plant procedurcs CIIP-615,' " Condensate and Feedwater Chemistry Control". Sampling and specification requirements for all system conditions are provided.

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J Question 4: Describe the procedures defin'ing corrective. actions for out-of specification chemistry conditions, including the~ authority for evaluating the data and the sequence and timing of administrative events required to initiate corrective action. We will require that the control of condenser leakage be based upon the water chemistry of the discharge of the hot well pump since this sample point _ is a better indicator of condenser leakage than a sample

-from the hot well. When a condenser leak is confirmed the leak-should be repaired or plugged within 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br />.as stated in Branch Technical Position MTEB 5-3 which is appended to Standard Review Plan, Section 5.4.2.1.

Response: Provided as Enclosure 3 is a copy of plant procedure CHP-612, "Out of Specification Handling and Reportiog". .It details the administration of out of specification conditions. In addition, provided as Enclosure 4 is the ATTACHMENT II to plant procedure CHP-612 which details recommended corrective actions to out of specification conditions.in the condensate and feedwater systems and in the steam generators.

i To further amplify.our response to condenser leaks, the previously mentioned CHP-615 contains the commitment:

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"In the event of of a confirmed condenser tube leak, the leak should be isolated or repaired within 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br />".

' To provide additional protection to the steam generators, the three steam generator blowdown parameters designated by %estinghouse as control parameters will be governed by stricter administrative -

guidelines. These are detailed in Enclosure 5, ATTACHMENT III, to

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plant procedure CHP-613.

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1 Question 5: Attachment I of your submittal indicates that sodium and silica in steam generator blowdown are analyzed every Monday, Wednesday

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and Friday. Provide the' basis for not analyzing these two impurities everyday for sodium and at least 5 days per week for silica.

Response: To be in agreement with the manufacturer's recommendations, silica analysis will be performed.5 days / week. Sodium analysis will be performed.5 days / week as long.as ir. trumented measure-ment is functioning and within specification. The answer to Question 9 is applicable in this situation.

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Question 6: Attachment I of your submittal'indicaces that ammonia in the condensate is analyzed weekly. Provide the basis for not analyzing it at.least'three times per week (Monday, Wednesday and Friday).

Response: Anunonia will be analyzed three times / week (Monday, Wednesday and Friday).

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Question 7: Indicate if amines (such as morpholine) are to be used as additives. If so,~ provide their_ sampling schedule.

Response: The only amine added is~ ammonia, see response to Question 6.

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Question 8: For the continuous process analysis instrumentation, describe the inethod and frequency for calibrating these instruments.

Response: Enclosure 6 is a' listing of the requirements to be implemented to ensure the accuracy of continuous process instrumentation.

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Question 9: For pH conductivity, free hydroxide and ammonia in the steam generator blowdown; for pH, conductivity, hydrazine, and oxygen

- in feedwater; and for pH, conductivity and sodium in condensate, Attachment I of your submittal indicates tha frequency of analysis-to be 5. days per week. Confirm uhether these five days imply Monday through Friday. Forithese parameters, weekend analyses may be omitted provided that:

(a) Chemical operating conditions are normal with stable chemistry control maintained, (b) In-line analysis instrumentation and automatic controls for chemical feed.are functioning properly, and (c) Emergency operating procedures are established and operating personnel are indoctrinated to exercise the proper corrective action.

Confirm that conditions (a), . (b) and (c) will be implemented for your program if weekend analysis is to be omitted.

2 "esponse:

This is to confirm that the conditions listed as (a), (b) and (c) in the NRC transmittal will be per Westinghouse's recommendations

-to allow omission of weekend analysis.

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Question 10: Identify the.various process sampling point locations within steam condensate, feedwater, and steam generator systems.

' Reference to sample point locations on a system schematic flow sheet is acceptable.

Response: Attached as Enclosure 7 is a listing of all. requested sample points.

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CHP-613 ATTACHMENT II

'PAGE 1 of 2 -

. , REVISION O -

$2EAMGENERATORCHEMISTRYSPNCIFICATIONS Condition Operating Hot Standby Wet Layup (10)(11)

Analysis Specification Frequency Specification Frequency Specification Frequency.

. (3) (4) (6) pH 8.5 - 9 0 5 Days / week 8.8 - 9 2 M.W.F. 10.0 - 10.5 Weekly -

> 2.0 but (2) Consistent with Conductivity < 7.0a.mhos/cm 5 Days / week > 2.0 '3mhos/cm M.W.F. ph Cation .

• 2.Opmhos/cm (3) Continuous Conductivity 0 75*C Reading Instr - -----

Chloride <0.15 ppm 5 Days / week <0.15 ppm M.W.F. <0.15 ppm Total Sus .

I pended Solids <1.0 ppm 5 Days / week <1.0 ppm M.W.F. <1.0 ppm Dissolved '

(12)

Oxygen N/A 5 Days / week <5 ppb M.W.F. <100 ppb

Free 0.15 ppm as (3) 0.15 ppm as (5) 0.15 ppm as (9)

Hydroxide CACO 3 5 Days / week CACO 3 CACO 3

• (4)(8) *

, Hydrazine 10 - 125 ppb 5 Days / week <2.0 ppm M.W.F. 75 - 150 ppm l Ammonia --- 5 Days / week Silica <1.0 ppm 5 Days / week <1.0 ppm M.W.F. <1.0 ppm l Iron M.W.F.

J Copper M.W.F.

• (5) (9)

Sodium <100 ppb 5 Days / week <100 ppb <100 ppb i ,

• Denotes Continuous Monitors.

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Enclosure 1 (page 2 of 2)

CHP-613 ATTACHMENT II PAGE 2 of 2  !

REVISION O l h

NOTES: 1) N/A

2) If total conductivity is <2.O p mho/cm or >7.0 4mho/cm 7

investigate to determine cau d.

3) See Attachment III for Steam Generator blowdown (Drum)

'perational o limits.

4) pH must be < 9 4 prior to operation. Steam may be bled to a condenser to reduce pH.

5) Analysis only required for first 2 days in hot standby condition and after each addition of m/u water > 500 gal.

6) pH should be allowed to decrease to <9 4 and >8.8 prior to a planned heat-up and startup. If pH >9 4 but <10.0, heat-up >250*F may proceed if steam may be bled to a condenser to reduce pH to <9 4.

7) Hydrazine concentration may be increased to 300 ppm with Chemistry Supervisor concurrence.

8) Hydrazine concentration may be allowed to decrease to <5 ppm within 1 week of planned heat-up and startup provided that oxygen concentration does not exceed 100 ppb.

9) Analysis only required after placin6 steam generators in fell wet layup or after make-up water additions of >500 gallons.

10) All analysis will be performed af ter initiat'on of full

( , wet layup,-nitrogen agitation,. chemical additions and prior to complete draining for m'aintenance. .

11) Nitrogen agitation is required following chemical additions, make-up water additions >500 gallons, prior to complete draining for maintenance and if chemical stratification is suspected.

_ 12) If dissolved oxygen level is >1.0 ppm, perform a nitrogen agitation to reduce oxygen levels.

- 13) If pH exceeds 9 4 as indicated by installed instruments, analyze for free hydroxide as soon as practical to ~

evaluate chemistry conditions.

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E'ncitsure '2 (page 2 of 2) CHP-615

' Attachment II FEED WATER CHEMISTRY SPECIFICATIONS Rev. O Condition OPERATING STARTUP WET LAYUP

-Analysis Specification Frequency Specification Frequency Specification Frequency .

pH

• 8.8 - 9.2 5 Days / Week 8.8 - 10.0 Daily 10.0 - 10.5 Weekly W Conductivity

• 4.0 phos /cm 5 Days / Week - - - -

at 25 C Max. -

Cation Conductivity

• N/A * - - - -

Chloride - - - -

4 0.5 ppm Weekly (3)

Sodium (2) * .020 ppm 5 Days / Week - -

0xygen

• Weekly (3)

(1) 0.005 ppm 5 Days / Week 0.10 ppm Max. Da.ly 0.100 ppm Max.

Max.

Hydrazine (1) * .005 ppm On 5 Days / Week .005 ppm 02 Daily 75 - 150 ppm Weekly ( }'

Min.

Ammonia None M. W. F. - - - -

Silica - - - -

0.20 ppm Weekly (3)

Iron .010 ppm M. W. F. 0.10 ppm Daily - -

Copper .005 ppm M. W. F. ~

0.050 ppm Daily - -

• DENOTES CONTINUOUS MON.; TOR (1) SAMPLE POINT IS AX-5 DE4ERATOR INLET.

(2) SAMPLE POINT IS AX-4 C0J.DENSATE PUMP DISCHARGE OR CONDENSATE POLISHER OUTLET..

(3) IF CONDENSATE PUMPS ARE AVAILABLE FOR RECIRCULATION.

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