ML20009C528

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to Proposed Secondary Water Chemistry Monitoring Program.
ML20009C528
Person / Time
Site: Comanche Peak  Luminant icon.png
Issue date: 07/15/1981
From:
TEXAS UTILITIES SERVICES, INC.
To:
Shared Package
ML20009C524 List:
References
PROC-810715, NUDOCS 8107210195
Download: ML20009C528 (11)
v • d • e


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i ATTACHMENT 1 comanche Peak Steam Electric Station Units 1 and 2 Proposed Secondary Water i

Chemistry Monitoring Program i

c Revision 1 NRC Docket Nos. 50-445 and 5-446 f

! July 15,1981 i

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8107210195 810714 PDR ADOCK 05000445 .

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Comanche Peak Proposed Secondary Water Chemistry 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 normal operation for each critical control point. Figure 1 shows these critical sampling points (and others) on a secondary system schematic.

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

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

Prcsess sampling 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, I and/or steam generator blow-down, the plant may decrease power so that the system causing the problem can be isolated and repaired.

l Corrective actions due to abnormal chemistry conditions are provided in l

Table 3.

l The Chemistry and Health Physics Engineer has overall responsibility t

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 plant operations because of abnormal

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Procedure CHM-104. indentifies the Chemistry and Health Physics Engineer 4 as the authority responsible for the interpretation of data.

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i 4 Once the Chemistry and Health Physics Engineer is aware of the off control point condition, and it cannot be corrected within a reasonable i

j amount of time, he will notify the Manager.of Plant Operations through f _teh 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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TABLE 1 Secondary Water Chemistry (Normal Operation)

' Steam Generator (water) ph at 250C 8.5 to 9.2

cationconductivity.(max.), 2.0 micromho/cm free hydroxide (max.), as ppm Ca C0 3 0.15

. Chloride,.as ppm Cl 0.15

[ ' Suspended Solids (max.), ppm 1.0 silica (max.), as ppm SiO2 5.0 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 as ppm Cl iron and copper, ppm (each) 0.01

. 0.005 i dissolved oxygen, as ppm 02

hydrazine -(residual), as ppm N H 24 0.01 Main Steam ,

1- ph at 250C 8.8 to 9.2 cation conductivity (max.), 2.0 f

micromho/cm silica (max.), as ppm SiO 2 0.5 4

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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 0 to 20 ppb; discharge oxygen high and low 0 to 200 ppb alarms pH recorder with 2 to 12 high and low alarms sodium ion recorder with 1 to 100 ppb high alarm Heater drain cation recorder with 0.1 to 10 4 pump discharge conductivity high ali.rm mmho/cm pH recorder with 2 to 12 high and low alarms Polisher outlet cation recorder with 0.1 to 10 conductivity high alarm mmho/cm

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TABLE 2.(Continued)

- SECONDARY PLANT SAMPLING SYSTEM SOURCES i

.i ' Parameter Receiver and Sample Source Measured Function Range 121 recorder with 2 to 12 high and low

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Steam generator Hydrazine recorder with 0 to 50 ' ppb i feedwater high and low (4 samples) alarms  ;

cation recorder with 0.1 to 10 i

conductivity high alarm mmho/cm i

pHL recorder with 2 to 12 high and low.

i alarms l

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' Main Steam cation recorder with 0.1 to 10 t

. (-4 samples) conductivity high alarm maho/cm I ,

4 pH recorder with 2 to 12

high and low r

l' alarms i

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! silica recorder with 0 to 100 ppb r high alarm I

! Vacuum deaerator ' dissolved recorder with 0 to 20 and outl et ' oxygen high alarm 0 to 200 ppb l-l-

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TABLE 2 (Continued)

SECONDARY PLANT SAMPLING SYSTEM SOURCES Parameter Receiver and Sample Source Measured Function Range Auxiliary condenser specific indicator with 0 to 100 outlets conductivity high alarm mmho/cm (2 local points)

-Steam Generator ph meter with 2 to 12 Blowdown recorder and high and low alarms cation meter with 0 to 10 conductivity recorder and mmho's high alarm sodi um Recorder with 0.1 to 1000

- analyzer alarm ppb 4

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TABLE 3 Corrective Action Due to Abnormal Chemistry Conditions During Normal Operations Typical Event: Condenser Tube Leakage Surveillance: An increase in the normal limits of such critical parameters as cation conductivity and sodium concentrations will prompt Action Levels to be initiated.

Critical Parameter Normal Abnormal Measurement

  • Concentration Concentration Action Level Cation Conductivity >2 mmhos

>2 but j:_5 mmhos I

>5 but < 7 umhos 11

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

>220 but <. 500 PPB II

>500 PPB III Action Level I - Identify and correct the problem causing the abnormal chemistry. Abnormal condition should return to normal within 7 days, if not proceed to Action Level II.

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.

Action Level III - Proceed immediately to Hot Shutdown.

TABLE 3 (Continued)

Corrective Action Due to Abnormal Chemistry Conditions During Normal Operations 1

    • 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 gL dance from the industry, h'estinghouse, and rescarch groups i

such as the Electric Power Research Institute.

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FIGURE 1 CPSES SECONDARY SYSTEM SCHEMATIC

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. MFP Cm N * . POLISHER D*

I MAKEUP h : -- WATER SYSTEM CP

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  • SAMPLING POINTS

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, BLOWDOWN PROCESSING

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