ML19318A989

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Forwards Supplemental Info on Program to Monitor & Control Secondary Water Chemistry
ML19318A989
Person / Time
Site: McGuire, Mcguire  Duke Energy icon.png
Issue date: 06/19/1980
From: Parker W
DUKE POWER CO.
To: Harold Denton, Youngblood B
Office of Nuclear Reactor Regulation
References
NUDOCS 8006240485
Download: ML19318A989 (8)
v • d • e


Text

{{#Wiki_filter:4 / i g DUKE POWER COdiPANY Powra ButtotNo 422 Socra Cacacu Srazzr. Cruar.orTz. N. C. asa-se w w u. o....aca.sa. June 19, 1980 ViCg Poggit,gast 'ggg e=0mg: An ta 7C 4 sega Peoovenon 373-4:s3 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Attention: Mr. B. J. Youngblood, Chief Licensing Projects Branch No. 1 Jwh

c. / 4

Subject:

McGuire Nuclear Station {g Secondary Water Chemistry Monitoring and Control

Dear Mr. Denton:

Please find attached supplemental information on the McGuire N. clear Station program to monitor and control secondary water chemist;ry. This information supplements my letters' of October 25, 1979 and May 23,- 1980 on this subject. Specifically, the information provides updated pages on Table 1 and Table 2 of my October 25, 1979 letter. In additioni Table 8 thru Table 12 is pro-vided to describe other procedures and administrative controls involved in' the secondary water chemistry program. I; statU 'in my October 25, 1979 letter, due to the continuing evolution of chemistry control technology the procedures and administrative control described in this program are subject to modification. Any modifications will be designed in accordance with the operating experience of McGuire Nuclear Station as well as new developements of technology. It should be emphasized that certain administrative limits specified iti the secondary water chemistry program are goals we will be striving to attain. A better understanding of system capability will be obtained during the first year of operation. Very truly yours, .dt'bY $ /$ , u r. William O. Parker, Jr. 7/7 o07 LJB:ses A Attachment ) r THIS DOCUMENT CONTAiNS /// POOR QUAUTY PAGES .~ f 8008240 y g

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Note: It should be cmphasized that these are goals.we will be striving to attain. A better understanding of actual specific system capabilities will be obtained ~during the first year of operation. TABLE 8 r.or In. e i.R.4 At1HINISTRATIVE CtllDFl.lNFS 81Ht I.ltilTIth: OrFitATloN ' I"R' I 'I d FF.FJNAlt at SYSIFil {#9 ~ rRForERATIONAI, ~ Cl.FANUp Nt1Rit'Ai.' b j* r* CliFillCAI. NC SYS1tM IH: SYSI Fil opfRATinN ~JRANSil.Nr CONDITIONS LINITilsc OrFRATION Tot pAPN.E1ER < 100"F > 100"F (Noje,1) JHeg e_2)_ _ iDU Ide~ ~ ' < 24 has < 2 has 8.7-8.8 8.6-8.7 4.5-8.6 pil 8.8-9.6 R. 8-9. 2 8.n-9.2 9,2-9.1 9.3 9.4 9.4-9.5 Cat Cond < 0.5 puhn < 0. 5 a.mtwo

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s. e c e c,e n e n _= e _e o i

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e w{
I

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l l

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=

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g g g l

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u. ;

w 21 2 3 3

a. -

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i

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  • J O

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_...ce q, . 9: .TA3LE112 CALIBRATION OF MCGUIRE NUCLEAR STATION'S PROCESS ANALYTICAL INSTRUMENTATION e . SECONDARY CHEMISTRY -pH Meters: Calibrated daily using a minimum of two different. purchased buffers, ACS Reagent Grade. Normally pH's of '7 and 9, 10, or l 11 are checked. Conductivity . Calibrated monthly by cross verifying the Meters: reading to a Balabaugh meter. The Balaburgh meter is. checked using selected potassium I chloride solutions to verify probe response, and checked electronically by our instrument-group. ' Dissolved Calibrated _ fully weekly (membrane changed, Oxygen Analyzers: electrolyte changed, and air calibration), checked for accuracy daily using the indigo carmine. method (in addition, chemets are sometimes used). 1Hydrazine Analyzers: Currently-calibrated daily by cross verifying the reading using a manual determination. This .may be relaxed to weekly in the future if results indicate this is feasible., Also see Note 1. ISilica Analyzer: Standardized daily using prepared standards of known-composition. ACS Reagent Grade chemicals are used. Soditafinalyzers: Standardized daily using standards prepared and verified'using a flameless Atomic Absorption tech-nique. See Note 1.- If, in the future,'the current calibration frequencies of these instruments are found to be excessive,-the frequency may be changed. however, it is highly doubtful' of - the frequency would be _less than weekly (except conductivity as 'these~2 nits are extremely. stable). No instrument will hold calibration indefini-tely and we feel that accurate data is'an absolute necessity, regardless of how many hoursLare required to calibrate these instruments. NOTE 1: The.Q. Sum, technique is used to insure accuracy of.these manual deter- .minations. This technique requires that at:least 20 duplicate sets of samples be analyzed under optimum conditions. This data is then used to. determine the standard deviation for both accuracy and precision of the method ~with a 95%. confidence-level. Graphs are.then prepared and each day the method is~used, the deviation of both accuracy and preci- .sion ar,e plotted. If a positive-slope change occurs'outside.of~the 95% . confidence limits, sample data is rejected and all_ samples are ' reanalyzed. :In addition,'at.least one standard must be analyzed with -eachysubsequent sample that day and that one standard must fall within ~ =theJstandard deviation of the method. _This insures that not only all ~ reagents used react as: required.Ebut also verifies instrumentation- . operation and thefanalytical technique of the technician. L _. _ __}}

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