ML20080P443
| ML20080P443 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 01/28/1980 |
| From: | Chaust R, Cox J, Evans L DUKE POWER CO. |
| To: | |
| Shared Package | |
| ML20080P419 | List:
|
| References | |
| CP-O-A-8100-01, CP-O-A-8100-1, NUDOCS 8402220546 | |
| Download: ML20080P443 (18) | |
Text
.g e
Form SPD-1002-1 DUKE POWER COMPANY (1) ID No: CP/0/A/8100/01 PROCEDURE PREPARATION Change (s) O to PROCESS RECORD O Incorporated (2) STATION: Catawba (3) PROCEDURE TITLE: Chemistrv Procedure fnr the ne r a-% n ri en of nF (4) PREPARED BY: k DATE: //- / " 77 (5) REVIEWED BY: AI uw DATE: /~//- 86 Cross-Disciplinary Rdview By: W- I/1/ /fd N/R: f 6 l. - 7 9 - /
(G) TEMPORARY APPROVAL (IF NECESSAR :
By: (SRO) Date:
By: Date:
(7) APPROVED BY: . b. Date: I- LY -3D (8) MISCELLANEOUS:
Reviewed / Approved By: Date:
Reviewed / Approved By: Date:
MASTER Rt.E 8402220546 840215 gDRADOCK 05000413 PDR
F0EM SPD-1001-3 DifKE POWER COMPANY NUCLEAR SAFETY EVALUATION CHECK LIST
^
(1) STATION: Catawba _ UNIT: 1 x 2_x 3 OTHER:
(2) CHECK LIST APPLICABLE TO: CP/0/A/8100/01 (3) SAFETY EVALUATION - PART A The item to which this evaluation is applicable represents:
Yes No A change to the station or procedures as described in the FSAR or a test or experiment not described in the FSAR?
If the answer to the above is "Yes", attach a detailed description of the item being evaluate $ and an identification of the affected section(s) of the FSAR.
(4) SAFETY EVALUATION - PART 3 Yes No Will this item require a change to the station Technical Specifications?
If the answer to the above is "Yes," identify the specification (s) affected and/or attach the applicable pages(s) with the change (s) indicated.
(5) SAFETY EVALUATION - PART C As a result of the item to which this evaluation is applicable:
Yes No L / Will the probability of an accident previously evaluated j ni the FSAR be increased?
Yes No V Will the consequences of an accident previously evaluated Yes No fntheFSARbeincreased?
V May the possibility of an accident which is different i han any already evaluated in the F3AR oe created?
Yes No Will the probability of a malfunction of equipment l
important to safety previously evaluated in the FSAR jbe increased?
Yes No V Will the consequences of a malfunction of equipment important to safety previously evaluated in the FSAR jbe increased?
Yes No V May trat possibility of malfunction of equipment ,
important to safety different than any already evaluated n the FSAR be created?
Yes No ill the margin of safety as defined in the bases to any Technical Specification be reduced?
If the answet to any of the preceding is "Yes", an unreviewed safety question is involved. Justify the conclusion that an unreviewed safety question is or is not involved. Attach additional pages as necessary.
, (6) PREPARED BY: M. DATE: //- /-79 (7) REVIEWED BY: dtm~t cb.o DATE: /- // ef d
/
(8) Page 1 of /
l l
l l
M ENCLOSURE 9 DUKE P0iER COMPANY
_1 ALARA tT. ALUATION CHECIIIST (1) Station: C474 W84 Unit: 1 /2 t/ 3 s Other:
(2) Chechlist Applicable to: A of 0 8140 0/
(3) AU2a Evaluation Check those items below which were considered applicable during the preparation and review of this document.
Flushing and draining was used to minimize source - strength and con-tatiination levels prior to performing an operation.
Pe=anent and/cr movable shielding was specified for reduction of levels.
Use of certinen. or te=porary local exhaust ventilation systems was used for control of airborne contamination.
Operation was designed to be completed with the least practicable time spent in the radiation field.
f t.[- Appropriate tools and equipment were specified for the operation to be
_ nerformed.
The operation was designed considering the minimu= number of people necessa y for safe job co=pletion.
Remote handling equipment and other special tools were specified to reduce exne nal dose. ,
Conta=ination - control techniques were specified.
The operation was designed to be c.onducted in areas of as low an exposure as practicable.
Additional ADJa censiderations were:
TU &*be'- % N hW) n h= Wru k I r V
.NN W&$$.Y Y U ' '
Ab *)b
/ U Al.A AA Mr&.
ALAPa P:inciples were not consicered since the procedure cid not involve work in a radiation area.
(5) Prepared by: _
- k. Date /~ /8" [8 (t) F.eviewed by: ct % , , JA Date /-//- /O
/
CP/0/A/8100/01 DUKE POWER COMPANT CATAWBA NUCLEAR STATION CHEMISTRY PROCEDURE FOR THE DETERMINATION OF pH 1.0 DISCUSSION 1,1 Scope This procedure describes the manual electrometric method for the determination of pH.
1.2 Principle The pH of a solution is defined as the negative logarithm of the hydrogen-ion concentration. A mathematical expression in terms of molarity is given by Equation 1.
pH = -log (H ) Equation 1 The potentiometric measurement of pH is based upon the ef fect of hydrogen ions on the membrane portion of the glass electrode, shown in Enclosure 6.1. While the actual source of the tr.sponse potential is not fully understood, it is generally accepted to be due to a potential developed on the surface of the glass membrane. This l potential is directly related to the log of the hydrogen-ion con-l l centration, that is, the measured potential follows the Nerns t l
equation, Equation 2.
+
, E = E - 0.0591 log (H ) Equaticu 2 l
l Temperature exerts two significant ef fects on pH measurements:
l 1
"P/0/A/8100/01
.igo 2 of 8 (1) the electrodes themselves vary in potential with temperature; (2) ionization in the sample varies with temperature .
The firs t ef fect car. be compensated for by an adjustment which is provided on the better commercial ins truments. Yne second ef fect is .
inherent in the sample and is compensated by recording both the temperature and the pH of each sample, and applying the appropriate correction factor.
1.3 Precisien and Interference The precision of many pH meters is 0.01 to 0.08 pH units.
The glass electrode is relatively unaf fected by interference from color, turbidity, colloidal matter, free chlorine, oxidants or reductants as well as from high saline content. However, at pH's greater than 10, error may be introduced by high sodium icn con-centrations; at pH's of 1 or less, the so-called " acid" error becomes significant.
Temperature has a pronounced ef fect upon the equilibrium constant for ammonia and lithium. If the pH of a solution containing ammonia or lithium is determined at a temperature other than 25 C, Enclosure 6.3, Temperature Correction Curve For pH ?or Samples Containing Ammonia, or Enclosure 6.4, Temperature Correction Curve For pH For Samples Containing I.ithium, can be used to compensate for this change in temperature. The use of these curves is explained in Section 4.3.
= , - - - ,e -sw-- ~ -- , e , ,
pn-~ e m-,,m, -, ,.y n .,- -me- - - , - - .- , a ,.,,-+-,-,-e- - - , - - , , , , , - - - , - -
-CP/0/A/8100/01
- mge 3 ol 8 It is important to protect high purity wster samples (less than 10 micrombos/cm conductivity) from the air because of carbon dioxide absorption and the subsequent " drift".
1.4 Limits and Precautions The pH scale extends from 0 to 14, but actual limits are specified by the manufacturer of the glass electrode used.
Electrodes are to be conditioned before use by soaking in a dilute hydrochloric acid solution, pH 2-3, or in the solution recommended by the manufacturer. The electrolyte solution level is to be checked daily and the filling port is to be left open during use to allow the electrode to weep. Between measurements, the electrodes are'tr be kept in dilute hydrochloric acid, pH 2-3, or the solution specified by the manufacturer. The electrodes, on many pH meters, are not to be removed from solution unless the pH meter is in Standby, otherwise, the electrodes may be damaged.
The probes must be well rinsed with demineralized water between standard buffer solutions.
l l 2.0 APPARATUS
( 2.1 pH meters 2.2 Station fabricated flow cell with stand, see Enclosures o.5 and 6.6 for dimensions and description of typical flowcell.
2.3 Electrodes, reference and glass, and/or combination.
2.4 Thermometers 2.5 Wash bottles
\
l' l
l I
9?/0/A/8100/01
.agn 4 cf 8 2.6 Clamp 2.7 100 ml beakers 3.0 REACENTS 3.1 pH 6.86 Buf fer (Fisher No. B-78) mix as per package ins tructions.
3.2 pH 9.18 Buf fer (Fisher No. B-80) mix as per package instructions.
3.3 pH 4.01 Buf fer (Fisher No. B-79) mix as per package instructions.
..o t e: If Buf fers are not available, see Enclosure 6.2.
3.4 Electrolyte Solution This solution is to be prepared as specified by the manufacturer of the reference or combination probe in use.
4.0 PROCEDURE 4.1 Flowcell Method 4.1.1 Standardization 4.1.1.1 Move the Function control of the pH meter to the Standby position, and using a funnel, pour approximately 200 ml of pH 6.86 buffer through the flowcell. Place a clamp on the rubber inlet tubing to retain the buffer solution in the floweell. Read the temperature of the buf fer l solution on the thermometer of the flovcell and l adj ust the Tempera ture Compensation control to l
that temperature. Place the Funttlon Control in l the pH position. Af ter the meter has stabilized, l
l adjust the Standardize control until the meter 1
agrees with the buf fer solution pH. The pH of l the buf fer can change with temperature. Enclosure 6.7 gives buf fer pH's for various temperatures l
l for precise work.
.CP/0/A/8100/01 N
agn 5 of 8 4.1.1.2 Move the Function control to the Standby position and rinse the flow cell with demineralized water for approximately 2 minutes at a rate of approximatel' ,
125 ml per minute. Using a funnel, pour approximate 1' ,
200 ml of pH 9.18 buffer solution through the flowcell and clamp the inlet tubing. Read the temperature of the solution on the flowcell thermometer and adjust the Temperature Compensation control. Place the Function Control in the pH
. position.
After the meter has stabilized, compare the meter reading to the actual pH buffer value. If the discrepancy between the reading and the actual pH value is greater than 10.20 pH units, notify the Chemistry Supervisor.
4.1.1.3 Repeat step 4.1.1.2 using a pH 4.01 buffer solution instead of the pH 9.18 buffer solution.
4.1.2 Sample Analysis With the Function control in the Standby position, remove the clamp from the inlet tubing of the flowcell and slip over the end of the sample line. Adjust the flow to approximately 100 ml per minute and allow the sample to flow through the cell for approximately 2 minutes. Next, remove the inlet tubing from the sample line and attach the clamp. Read the temperature on the flowcell thermometer and adjust the Temperature Compensation control to that temperature.
SP/0/A/8100/01 agn 6 cf 8 4
Place the Function control in the pH position and allow the meter to stabilize. Read the pH, then move the Function control back to the Standby position.
Af ter using, flush the flo.rcell with demineralized water for approximately 2 minutes and leave demineralized water in the flowcell.
NOTE: If the pH meter is not to be used for an extended period of time, the electrodes are to be removed from the flowcell and stored in a dilute hydrochloric acid solution, pH 2-3, or in the solution specified by the manufacturer.
4.2 Beaker Method e 4.2.1 S tandardiza tion 4.2.1.1- Place the Function control of the pH meter in the Standby position. Pour approximately 50 ml of pH 6.86 buf fer solution into a beaker, and position the pH probe in the buf fer. Measare the temperature of the buffer and adjust the
- Temperature Compensation control to that tempera ture.
Place the Function control in the pH position.
Af ter the meter has stabilized, adj ust the Standardize control until the meter agrees with the buffer solution pH. Move the Function control to the Standby position. Remove the pH probe from the buf fer and rinse with demineralized water.
3
. - - . . - . . _ . . - . . - . , , , , . .- _, _. _ . . . _ - . . . , _ . . _ _ _ , . -___m. . _ _ , . _ _ . _ - - . _ . .
^ -
' CP Da/0/A/3100/01 ge 7 of 8 4.2.1.2 Pour approximately 50 ml of the pH 9.18 buffer into a beaker, and place the pH probe in the buffer.
Measure the temperature of the buffer and adjust the Temperature Compensation control. Place the Function control in the pH position.
After the meter has stabilized, compare the meter reading to the actual pH buffer value. If the discrepancy between the reading and the actual 4 value is greater than +0.20 pH units, notify the Chemistry Supervisor. Move the Function Control to the Standby position, remove the pH probe from the buffer and rinse with demineralized water.
4.2.1.3 Repeat step 4.2.1.2 using a pH 4.01 buffer solution instead of the pH 9.18 buffer solution.
4.2.2 Sample Analysis With the Function control in the Standby position, pour approximately 50 ml of sample into a beaker and place the pH probe in the sample. Measure the temperature of the sample and adjust the Temperature Compensation control.
Place the Function control in the pH position and allow the meter to stabilize. Read the pH, then move the Function control to the Standby position. Remove the pH probe from the sample and rinse with demineralized water.
' ~
t;P/0/A/8100/01 ags 8 of 8 4.3 Use of the Temperature Correction Curves, Enclosures 6.3 and 6.4.
Normally, samples should be brought to 25 + 1 C. For precise work measure the sample pH and tesperature as stated in Section 4.2.
Locate the sample temperature along the horizontal scale of the appropriate Enclosure (6.3 or 6.4) and find the corresponding nunerical value of the pH correction along the vertical scale. Add or subtract this value to the measured sample pH to obtain the corrected pH.
5.0 REFERENCES
5.1 McGuire Nuclear Station Chemistry Procedures CP/0/B/8100/19 and CP/0/B/8100/19A, CP/0/B/8100/43, and CP/0/B/8100/44 5.2 Oconee Nuclear Station Chemistry Procedure CP/0/B/300/15.
5.3 Steam Production Department System Power Chemis try Procedures CP/53, CP/90 and CP/91.
5.4 American Society for Testing and Materials,1978 Annual Book of ASTM Standards, Part 31, D 1293-78, Pages 191-203, 5.5 Standard Methods for the Examination of Water and Was tewater,14th Ed. ,1975, Part 424, Pages 460-465.
l l 6.0 ENCLOSURES 6.1 Glass Electrode 6.2 Alternate ,:H Buf fer Solutions 6.3 Temperature Correction Curve for pH for Sample Containing Ammonia
! 6.4 Temperature Correction Curve for pH for Sample Containing Lithium 6.5 Ploweell Dimensions 6.6 Flowcell
'7
. pH of Buffers from 5 to 35 C.
l
.s CICLOSLT2 6.1 CP/0/A/8100/01 Glasc Electrode
- sc h
EighkesistanceGlass l
l
%)
Electrolyte I N Internal Reference l
Solution Electrode pH - Responsive Glass I
I l
l
s ENCLOSURE 6.2 CP/0/A/8100/01 .
ALTERNATE pH BUiFER SOLUTIONS 6.2.1 0.025H - Phosphate Buffer (pH 6.86 at 25 C)
Oven dry approximately four grams each of both potassium dihydrogen phosphate (KH3PO,) and sodium hydrogen phosphate (Na2 HP04 ) for two hours at T10 - 130 C.
In a volumetric flask, dissolve 3.40 + 0.0lg of KH P0 and 3 4 4 3.55 + 0.01g of Na HPO 4
in carbon dioxide free demineralized wateranddilutetaoneliter. Store in a poly bottle. The solution is stable indefinitely when protected from exposure to the atmosphere.
6.2.2 0.0L] Borax Buffer (pH 9.18 at 25 C)
Oven drf approximatelg four grams of Borax (Na,B '4'0,. 10H,0) one hour at 110 - 130 C. ~
In a volumetric flask, dissolve 3.81 + 0.01 g of Na B,09 .10H 30 incarbondioxide-freedemineralizedwateranddilute*tdone' liter. Store in a poly bottle and discard after one month.
6.2.3 0.05M Potassium Hydrogen Phthalate (pH 4.01 at 25 C)
Oven dry approximately twelve grams of potassium hydrogen phthalate (KHP) for one hour at 110 - 130 C.
In a volumetric flask dissolve 10.21 + 0.0lg of KHP in carbon dioxide frae demineralized water and Hilute to one liter.
Store in a polyethylene bottle and discard after six weeks or when organism growth is apparent.
INCI,OSU3I 6.3 CP/0/A/8100/01 Temperature Correction Curve For pH For Samples Containing Ammonia t
l 0.7 0.6 l O.5 A
. 0.4 :
licas-P' 3.3 0.2 J
0.1 0.0
., 0.0 0.1 0.2 -
SubEract -
frc=
Mansured 0.3 '
pH l
0.4 i
i 1
0.5 I
0.6 '
0.7 ,
0 5 10 15 20 25 30 35 40 45 50 Sc=yle Te=perature *C l
ENCLOSURE 6.4 CP/0/A/8100/01 TEMPERATURE CORRECTION CURVE FOR pH '
FOR SAMPLES CONTAINING LITHIUM 0.8 0.7 0.6 0.5 Add To 0.4 Measu-PH 0.3 1 -.
0.2 O.1 l 0.0 _
l 0.0 l 0.1 --
0.2 Subtract 0.3 l From ;
Measured pH 0.4 -
l 0.5 i
0.6 0.7 EE=
O . 8 ~- -
l t
0 5 10 15 20 25 30 35 40 45 50 55 60 65 Sacple Temperature C
N ESC 1.OSURE 6.5 CP/0/A/8100/01
. Fic.ucell Dimensions 5/8" D. Holes b
,y si l l # 3/8" D. Hole Scale 4 -4 +
Full S- -
i I 4.3/4" 3/4" 3/4". , ,,,,,_ i n
):
' I
- I s s I ' ' I I ,,
i n l t I 1 i i------ s. - II l l I
- I i w I I i i i i io - . _
^ i I I l i l l' ---i : I
- o i1 y i .I 1s l : ,I i s i 38w Ti -* II
-- 7 i e 2 ~
ll
! ': w --
~ 1
' i lo ;
l ' -J'hN I 5 88 l Uw a
,___J.____- I 'A ' ,
)*-L T 1/4" p. Holes N I ., I s l u I g l
" Q g i l = I l l I
' l I CI I .
I
/=N '
I e o i ss 1 c 3 i i
I .5 8 ' ' I :
- I I Holes for '
i l C e !
I l ' g J
l N l I Monreing "I " "- ] I l "h M~ i
- - - - O*'
s
/
,-g s ) .
l \ / ,a s ', m s -
3 .
se s
~ N.'/
3n l 1/2" l
Floucell is made from 1" lucite flat stor and plugs are made from 1/4" lucite rods, cemented in place with solvent i
. s s.
NCLOSyg:. ~ 6. 5 I
Elove,3f0/01 O
ru. ,. ,,,,,
- llll: 3, 7
E
" "** n.c=, s, D .-
- As Ruby
- N*dL'l"*
l ll ~". '
\A l}I r
/ 4e, '
IUbu fo,. tthylene ! I
.s
' I
"* I
.) I t
o T ! I s EENnl:SL ~.
~ .
I I
1 1
l I e s ,,
i -
+. 1 1
. : In l i
-r 1 '
'.l1us
-l i , :
- I l l
l r ~~ a '~ ~ ~ ~~~~~~~
i I I t~~~~*._, .~.s,
- f. I i
, . 4cunes:
j 1 i
y s
~/ gcrey, j
i-1 i
/
I 4s ' , , '
t r ,
Sam. p3 Out I.
j I s, ,s,
~ ,
/ ' ~~ T I
- i I
,o .
- g . . . . . ..I I
. ~ ,
- s. ..
.O e ,
ll i
, - , - - - - - r---w-_,,,w- n_-, ~ - -
.s-j ENCLOSURE 6.7 i CP/0/ A/8100/g1 ,
pH OF BUFFERS FROM 5 TO 35 oC M
oH of Buffers pH 4.01 pH 6.86 pH 9.18 Temperature C 0.05M KHP 0.025M Phosphate 0.01M Borax 5 4.00 6.95 9.39 10 3.99 6.92 9.33 15 4.00 6.90 9.25 20 4.01 6.88 9722 25 4.01 6.65 9.18 30 4.02 6.84 9.14 35 4.02 6.84 9.10 1.
.