ML20009B041

Proposed Secondary Water Chemistry Monitoring Program.

ML20009B041
Person / Time
Site:	Comanche Peak
Issue date:	07/10/1981
From:	TEXAS UTILITIES SERVICES, INC.
To:
Shared Package
ML20009B026	List: ML20009B025 ML20009B041
References
PROC-810710, NUDOCS 8107140697
Download: ML20009B041 (10)

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8 ATTACHMENT 1 4

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Comanche Peak Steam Electric Station Units 1 and 2 Proposed Secondary Water l Chemistry Monitoring Program i

l' I NRC Docket Nos. 50-445 and 50-446 4

July 10,1981 l

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CPSES/FSAR Comanche Peak Proposed Secondary Water Chanistry Monitoring Program The CPSES secondary sampling schedule will be, in large part, Westinghouse's suggested general schedule for sampling. -This schedule will be included into procedure CHM-106..

The critical sampling control points for secondary system chemical parameters are steam generator (water), main steam and condensate feedwater. Table 1 provides chemical parameters and their values for .,

nomal operation for each critical- control point.

The procedures used to measure the value of critical parameters are:

a. pH-CHM-332 - This method involves the immersion of a glass electrode into the sample and recording the reading on the meter.

b. Conductivity - CHM-309 - This method involves the measurement of the electrical conductance of the sample using a dip cell or a flow cell connected to a bridge type instrument.

c. Chloride - CHM-203 - Several methods will be applicable for this analysis. Those that may be used are:

(1) a titrametric method using dilute mercuric nitrate solution in the presence of mixed diphenylcarbazone - brosophenal blue

indicator.

(2) a spectrophotometric method that uses the formation of terric l

thiocynate complex from the reaction of chloride ion with mercuric thiocyanate.

CPSES/FSAR

d. Suspended Solids - CHM-330 - This method ir.volves the filtration of the sample through a 0.55 micron filter paper and weighing the increase in weight of the filter paper.

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e. Silica - CHM-325 - This method is a spectrophotometric method. A colored complex is produced by the reaction of soluble silica with molybdate.

f. Flourides - Specific ion electrode technique.

Process sumpling points and potential grab sample points are provided in Table 2.

Procedure CHM-101, " Chemistry Document Control" will describe the methods, techniques, and responsibilities for the recording of all chemistry data, the review of the analytical results or trends, and the records storage requirements for this information. The responsible senior technician, Radiochemist and the Chemistry and Health Physics Engineer shall have a review responsibility of these chemical records.

The Chemistry and Health Physics Engineer has overall review responsibility of these records.

! If abnormal chemistry cannot be corrected within a reasonable period of time by chemical addition, use of full flow condensate polishers, and/or steam generator blow-down, the plant may decrease power so that

! the system causing the problem can be isolated and repaired.

I Corrective actions due to abnormal chemistry conditions are provided in Table 3.

L The Chemistry and Health Physics Engineer has overall responsibility f

j for the timely recommendation of corrective actions to correct abnormal secondary side chemical conditions. The Manager of Plant Operations is responsible for deciding to modify plat operations because of abnormal i

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CPSES/FSAR chemical conditions.

Procedure CHM-104 indentifies the Chemistry and Health Physics Engineer as the authority responsible for the interpretation of data.

Once the Chemistry and Health Physics Engineer is aware of the off control point condition, and it cannot be corrected within a reasonable amount of time, he will notify the Manager of Plant Operations through the Engineering Superintendent, who upon ascertaining the situation and considering consequences, will decide upon a schedule for appropriate correction of the problem.

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CPSES/FSAR TABLE 1 Secondary Water Chemistry (Nonnal Operation) .

Steam Generator (water) ph at 250C 8.5 to 9.2 cation conductivity (max.), 2.0 micromho/cm free hydroxide (max.), as ppm Ca C03 0.15 Chloride, as ppm Cl 0.15 l- Suspended Solids (max.), ppm 1.0 silica (max.), as ppm SiO2 5.0 1

Condensate Feedwater

. ph at 250C 8.8 to 9.2 disolved solids (max.), 1.0

. as ppm Ca C0 3

! free. hydroxide (max.), 0.15 f as pom Cl iron and copper, ppm (each) 0.01 dissolved oxygen, as ppm 02

• hydrazine (residual), as ppm N 24 H 0.01 l

l Main Steam i

ph at 250C 8.8 to 9.2 P

. tation conductivity (max.), 2.0 micromho/cm silica (max.), as ppm SiO 2 0.5

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TABLE 2 SECONDARY PLANT SAMPLING SYSTEM SOURCES Parameter Receiver and Sample Source Measured Function Range Hot wells cation recorder with 0.1 to 10 (2 samples) conductivity high alarm mmho/cm Hot well salinity specific indicator with 0 to 100 troughs conductivity high alarms mmho/cm (16 local points)

Condensate pump dissolved recorder with 9 to 20 ppb; discharge oxygen high and low 0 to 200 ppb alarms pH recorder with 2 to 12 high and low alams sodium ion recorder with 1 to 100 ppb high alarm Heater d.o.'n cation recorder with 0.1 to 10 pump d. sc' arge conductivity high alarm mmho/cm pH recorder with 2 to 12 high and low alarms Polisher outlet cation recorder with 0.1 to '.0 conductivity high alarm mmho/cm

CPSES/FSAR TABLE 2 (Continued)

SECONDARY PLANT SAMPLING SYSTEM SOURCES 1

Parameter Receiver and 4 Sample Source Measured -Function Range pH recorder with 2 to 12 high and low

.alarms

! Steam generator Hydrazine recorder with 0 to 50 ppb feedwater high and low (4 samples) alarms cation recorder with 0.1 to 10 conductivity high alarm mmho/cm pH recorder with 2 to 12 high and low alarms Main Steam cation recorder with 0.1 to 10 (4 samples) conductivity high alarm mmho/cm i

pH recorder with 2 to 12 high and low alarms silica recorder with 0 to 100 ppb high alarm Vacuum deaerator dissolved recorder with 0 to 20 and outlet oxygen high alarm 0 to 200 ppb i-I f

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f-TABLE-2 (Continued)

SECONDARY PLANT SAMPLING SYSTEM SOURCES i-Parameter Receiver and 4 Sample Source Measured Function Range

. Auxiliary condenser specific indicator with 0 to 100 outlets conductivity high alarm mmho/cm (2 local points)

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Steam' Generator ph (Later) (Later)

Blowdown cation (Later) (Later)

I conductivity sodium (Later) (Later) analyzer f

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CPSES/FSAR-TABLE 3 .

Corrective Action Due to Abnormal Chemistry Conditions During Normal Operations Typical Event: Condenser Tube Leakage t

-Surveillince: An increase in the normal limits of such critical parameters as cation conductivity and sodium concentrations will prompt Action Levels to be initiated.

i Critical Parameter Normal Abnormal Measurement

• Concentration Concentration Action Level

. Cation Conductivity >2 mmhos >2 but j[ 5 mmhos I

>5 but < 7 umhos II

>7 umhos III 4

I Sodium Concentration <150 PPB >150 but < 220 PPB I

>220 but j( 500 PPB II

>500 PPB III Acticn Level I - Identify and correct the problem causing the abnormal chemistry. N) normal condition should )

return to normal within 7 days, if not proceed to Action Level II.

l Action Level II - Within four hours reduce power to less than 50%.

Correct abnormal condition within 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />, if not proceed to Action Level III.

t Action Level III - Proceed immediately to Hot Shutdown.

CPSES/FSAR TABLE 3 (Continued) -

Corrective Action Due to Abnormal Chemistry Conditions During Normal Operations

• As measured at the Steam Generator Blowdown.

• • Note: Normal and abnormal concentrations and action level times were selected for illustrative purposes only. Real values will be developed later and will be selected using the latest guidance from the industry, Westinghouse, and research groups such as the Electric Power Research Institute.

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