ML061000472
| ML061000472 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 04/20/1993 |
| From: | Parton A Southern Nuclear Operating Co |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| 32430-C, Rev 2 | |
| Download: ML061000472 (4) | |
Text
Approved By
- ~Procedure Number Rev A.S. Parton-
',Vogtle Electric Generating Plant 3
2 Date Approved DETERMI INATION OF ZINC Page Numrcr 04/20/93 1 of 4 Reference Use Procedure 1.0 PURPOSE This procedure provides instructions for determination of total and soluble zinc in water by atomic absorption. This method can be applied to zinc analysis of the Circulating Water (CWV) System.
2.0 PRECAUTIONS AND LIMITATIONS 2.1 NPDES limits for discharge of circulating water for total zinc <1.0 ppm. If total zinc is greater than 0.95 ppm, notify Chemistry Supervision for corrections in zinc addition rate.
If total zinc is greater than or equal to 1.0 ppm, notify Chemistry Supervision and Operations to cease Circulating Water Basin blowdown.
2.2 The range of total and soluble zinc will be 0.1 ppm to 1.0 ppm with a minimum sensitivity of 0.1 ppm zinc.
2.3 Thc digestion step is not a rigorous digestion, and hence, this method is not approved as as official method for NPDES purposes.
3.0 MATERIALS 3.1 Hitachi Z8000 and associated equipment 3.2 FLASKS 3.2.1 Erlenmeyer 3.2.2 Volumetric 3.3 GRADUATED CYLINDER 3.4 0.45 MICRON FILTER MEDIA 3.5 REAGENTS 3.5.1 Zinc Digesting Reagent Approximately IN H2SO4 pipet 2 mls of concentrated H2SO4 in a 1 I volumetric flask and fill to the mark with reagent water. Shelf life of 5 years.
3.5.2 1000 ppm Zinc Standard - Certified This standard is normally purchased from qualified vendor.
PintMA Mnrr I~
('I~,q I nt5I
Approved By 4
Procedure Number Rev A.S. PartonVogtle Electric Generating Plant A~
Date Approved DETERMINATION or ziNC Page Number 04/20/93 2 of 4 4.0 TEST STAND QUALITY CONTROL 4.1 CALIBRATION Calibration of this test stand should be performed at the frequency prescribed in Procedure 31005-C.
4.1.1 Refer to Procedure 32801-C for appropriate method for zinc determination. Complete attached Calibration Certificate.
5.0 SAMPLE PREPARATION AND ANALYSIS 5.1 TOTAL ZINC DETERMINATION 5.1.1 Pour 50 ml unfiltered water sample into an erlenmeyer flask.
5.1.2 Add about 2mls of "Zinc Digesting Reagent".
5.1.3 Stir for approximately 5 minutes.
5.1.4 Transfer the acidified sample to a graduate cylinder, dilute to 100 ml with reagent water and mix well.
5.1.5 Filter a minimum of 25 ml of the acidified. diluted sample through 0.45 micron filter media.
5.1.6 Analyze this dilute sample per Procedure 32801-C or as directed by Chemistry Supervision.
5.1.7 Correct for the dilution by multiplying the result by the dilution factor of 2.0, and report as total zinc.
NOTE Lab Supervision may direct that the dilution ratio may be changed (see Step 5.1.1, 5.1.4, and 5.1.7) without changing this procedure. Use the appropriate dilution factor in these cases.
5.2 SOLUBLE ZINC DETERMINATION 5.2.1 Filter a minimum of 25 ml of the raw water sample through 0.45 micron filter media.
5.2.2 Analyze this filtered sample per applicable Chemistry procedures or as directed by Chemistry Supervision.
Pi.tA Mq-h IA ,00f t I 0. I R
Approved By 4Procedure Number Revi A.S. Parton VogtLh Electric G.
3enerating Plant A
32430-C 2R Date Approved DEl ERMWvINATriON OF ZINC Page Number 04/20/93 3 of 4 5.2.3 Report analytical results as soluble zinc.
6.0 REFERENCE 6.1 Series 32000-C 6.2 Series 35000-C 6.3 36001-C END OF PROCEDURE TEXT Pim-i m.-h i r, 7nnr, w i n-i R
Approved By i
Procedure 'lumber Rev A.S. Parton iogtie Electric Generating Plant 32430-C 2
Date Approved DETERMI INATION OF ZINC Page Number 04/20/93 4 of 4 VOGTLE ELECTRIC GENERATING PLANT CHEMISTRY DEPARTMENT CALIBRATION CERTIFICATE DATA SHEET I PROCEDURE TITLE AND NUMBER 32430-C, Determination of Zinc FREQUENCY lonth!y MAXIMUM TIME BETWEEN CALIBRATIONS 45 days TOLERANCE
+/-2 Sigma MINIMUM SENSITIVITY EQUIPMENT I.D. NUMBER Hitachi Z8000 S/N DATE. OF LAST CALIBRATION DATE. OF THIS CALIBRATION SPEC:IAL INSTRUCTIONS:
Correlation Coefficient:
STANDARD USED CALIBRATION RESULTS ACCEPTANCE TOLERANCES REMARK I___
I SAT UN PERFORMED BY:
APPROVED BY:
DATE_
DATE_
I I
I.
P;.XtzlM m.h i r,nntl At i A. i 2