ML20058H636
| ML20058H636 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 04/28/1982 |
| From: | Stuart C, Wedgeworth B MISSISSIPPI POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20058H456 | List: |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.B.3, TASK-TM 08-S-04-109, 8-S-4-109, NUDOCS 8208030665 | |
| Download: ML20058H636 (11) | |
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PLANT OPERATIONS MANUAL Attachment 7 to AECM-82/339 Volume 8 08-S-04-109 Section 04 Revision 0 Date: 4/28/80
' CHEMISTRY INSTRUCTION ,
OPERATION OF ORION 701 ION ANALYZER SAFETY RELATED .
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List of Iffective Pages:
Page: Revision -
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8208030665 820730 PDR ADOCK 05000416 P PDR
.- CRAND CULF NUCLEAR STATION CEEMISTRY INSTRUCTION 1
Title:
Oparction of Orion 701 Ion l No.:08-S-04-109 i Revision: 0 i Pega: 1 l l Analyzer 1 l l l 1.0 INSTRUMENT DESCRIPTION Orion Digital pH/Mv Meter 701A and Manaal Electrode Switch Model 605
2.0 REFERENCES
2.1 Orion Research Instruction Manual IM701A #460000949 i
2.2 Orion Research Instruction Manual IM605 #460001037 ,
b 2.3 Chemistry Section Procedure 08-S-03-01 3.0 DEFINITIONS
- S 3.1 Specific ion electrode - A device that developes an electrical potential proportional to the logarithm of the activity of an ion in solution.
4.0 PREREQUISITES 4.1 Specific ion electrode ,
4.2 Referince electrode -
4.3 An assortment of reference standards 4.4 Reference electrode filling solution 5.0 PRECAUTICNS 5.1 Always make measurements or calibrations with the test solution in a ,
non-metal container.
5.2 Place the instrument function switch in standby prior to removing the
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I~ electrodes from solution.
jS I 5.3 To eli='inate warm up time and increase component lifp, always leave the meter in the STDBY mode rather than disconnect from line power. , Warm-up f
l time is 30 minutes.
l 5.4 Check reference electrode fil' ling solution at least one' inch 'biFe a the solution being measured.
5.5 Allow all samples and standards to resch the ea=e te=peratura before attempting a measurement.
'5.6 Stir both standards and samples with a magnetic stirrer while A specific ion measurement is being made. Some magnetic stirr.ers generate enough heat to increase the temperature of the solution. To avoid this , place a '
piece of thermal insulating material between the stirrer and beaker.
5.7 Rinse electrodes with demineralized water between measurements.
GRAND CULF NUCLEAR $TATION CEEMISTRY INSTRUCTIO'.1, ' $ -
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Title:
Oparction of Orion 701 Ion i No.:08-S-04-109 i Rsvision: 0 i Pago: 2 l
! Analyzar l l I l 5.8 Never use an individual reference and ce==on reference in the same solutions, 6.0 INSTRUCTIONS 6.1 Functional Check - 701A Ionalyzer 6.1.1 Connect the shorting strap between the input jack and reference i jack, and turn the function switch to STDBY. -
6.1.2 Connect the power cord of the 701A to a suitable power source.
Let the meter warm up for thirty minutes.
6.1.3 With the function switch on STDBY, verify that a decimal point p only is displayed in the middle of the display.
6.1.4 Turn the function switch to REL MV and verify a display of polarity sign and four digits.
b .1.5 Using the calibration control, verify that the display is adjustable from about -200mv to +200mv. Adjust the calibration control for a display of 000.0.
6.1.6 Turn the function switch to pH/.001.
6.1.7 Turn the ISO ADJ screw to obtain the isopetential point ( 7.000) .
Verify that turning the t e=perature ce=pensator knob does not change the reading by more than 10 002 pK. ,
6.1.8 Turn the function switch to MV. Verify a display of 000.01 0.1.
If the display is outside these limits, adjust to 000.0+ 0.1 with the 0 adjust on the rear panel.
6.1.9 Turn the function switch to pH/.001. Set the slope indicator' dial l to 100% and turn the temperature compensator knob until the white l arrow points to 29*C. At this te=perature a change of one pH unit l corresponds to a 60 =v change in potential.
6.1.10. Turn the calibration control until a reading is obtained t' hat is 0.50 pH units less than the isopotential point. - -
6.1.11 set function switch to REL M and verifv a displav of 30.0*. 0.3 j mv. If the meter does not checkout in any of the above_ steps,
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- l .. repeat the step. If the second att e=pt fcils, contact the Lead Laboratory Chemist .
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6.2 605 Electrode Switch e
GRAFD CULF NUCL AR STATION CEDilSTRY INSTRUCTION .
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Title:
Op2ratica of Oricn 701 Icn l No.:08-S-04-109 l R:visien: 0 l Pcga: 3 l l Analyzer l l l l 6.2.1 Operation
- a. The Channel Selector Switch on the instrument is used to select from any channel "0" through "5". When channel "0" is selected, standardization is acco=plished utilizing the instrument standardization control and not one of the five
. channel controls on the electrode switch. Channel "0" must be
. standardized before switching the' electrode switch on.
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- b. Standardize each channel used by p, lacing the Selector Switch to the corresponding channel and r~otating the " calibrate" control for that respective channel and to the desired reading.
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- c. To verify the original setting at any item, connect a shorting lead between channel "0" reference and sensing electrode input jacks and note the readings. If the readings do not coincide with the original readings, the controls have been moved and the channel vill require restandardization.
6.2.2 Battery Check
- a. To perform an instrument battery check, verify that the electrode switch is connected to the respective meter, i.e., .
701A. . ,
- b. S'e t the Meter Selector Svich to the MV position.
- c. Switch the . electrode switch off.
- d. Connect a shorting lead between the battery check jack on the rear panel and the sensing electrode input jacket of channel "0". .
I e. Verify that the Electrode Switch Channel Selector points to Channel "0". .
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- f. Read the battery voltage on the meter. A reading of 250 millivolts or greater indicates proper battery voltage. If less, contact the Lead Laboratory Chemist.
6.3 Operation -
6.3.1 The 701A Ion Analyser can be used for both pH measurements or specific inn analysis.
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s GRAND CUI.F NUCLEAR STATION CHEMISTRY INSTRUCTIQNr J
l Ittle: Oparction of Orion 701 lon i No.:06-5-04-109 i Rivtsion: 0 i Pcge: 4 l l Analyzer l l l l
- a. pH Measurements (1) Select two buffers whose pH values bracket the expected sample pH, with one buf fer between pH 6 and pH 8. Check.
the label on the buffer packet or bottle for the exact pH at the solution tecperature.
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(2) Set the isopotential point to the pH of the buffer i
between pH 6 and 8. To change the iso' potential point from the factory setting of 7.000, connect the shorting
. strap between the input and reference jacks. Turn the function switch to REL MV and' set the reading to 000.0 with calibration control. Turn the function switch to pH/.01. Turn the ISO ADJ screw on the back of the meter p -
until the desired isopotential point is displayed.
(3) Remove the shorting strap. Attach the combination pH electrode or pH electrode and reference electrode securely to. the meter. Turn the function switch to pH/.01.
(4) Place electrodes in the buffer whose pH is the isopote6tial point. Stir with a magnetic stirrer for all
. measurements. Turn the calibration control until the isopotential point is displayed.
(5) Remove the electrodes from the isopotential buf fer and rinse.
(6) Place the electrodes in the second buffer solution.
l (7) . If necessary, turn the temperature compensator until the pH value of the second buffer is displayed. Turn .the slope indicator dial until the temperature c.ompensator arrow points to the buffer temperature. Read the percent of the theoretical Nernst slope at the "% slope" index i line. If the I'Nernstian slope is less than 90%, repeat l the standardization with fresh buffers. If the % slope is again less than 90%, see KEASUREMENT DIFFICULTIES, page 16 of Reference 2.1. , -
(S) Remove elec trodes , rinse, and place in the unknown ,
sample.
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l - '(9) Allew about one =inete for the . reading to stabilize, and H. : -
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record the pH measurement directly from the display.
(10) Place the instrument' function switch in standby, rinse the electrodes and store ir, demineralized water.
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, .- Cb. AED CULF NUCLEAR" STATION C'dEMISTRY INSTRUCTION l Titic: Op2rction of Orion 701 Icn l No.:08-S-04-109 i Rzvtston: 0 i Page: 5 l l Analyzer l l l l 1
.b . Specific Ion Measurements NOTE Individual instructions are written for each specific ion measurenent. The following is to be used as a general instruction for use of the 701/605 combination.
(1) Multiple specific ion measurements can be made by connecting the Orion Model 605 manual electrode switch to i the ion analyser. >
(2) Prepare three standards that bracket the unknown sample concentration. Add the ionic strength adjustor, or pH 7 ,
adjustor, recommended by the electrode insttuction manual. For greater accuracy, more standards may be prepared and measured.
l (3) Place electrodes in the mid range standard and select l
proper channel on the electrode switch.
. (4) Set the function switch to the MV (absolute) position.
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Wait for the prescribed time, read, and record.
(5) Set the function sOitch to the REL MV position. Wait for I
a stable reading. Adjust the individual calibration control until the meter reads 000.0. Since the offset potential in the REL MV mode is about +200=v, it is impossible to zero the meter when the electrode potential is outside these limits; in these cases, simply turn the function switch to the MV position and record the ,-
electrode potentials to 0.lmv.
l ,( 6) Rinse electrodes, blot dry, and place in the most ' dilute F standard. Wait.for the prescribed time, read and record.
(7) Rinse electrodes, blot dry, and place in the most concentrated standard. Wait for the prescribed time, read, and record.
f ( 8)' Using semilogarithmic graph pa'per, prepare a calibration I
curve by plotting the electrode potentials measured I ' (=illivol t readings) on the linear nr.is and-the activity l
or conce'ntration value of the stcndards en t'he logarith=ic axis.
'- (9) " Rinse electrodes and place in the unknown' sample. Wait -
for the prescribed time, read and record.
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2-GRAND C'JLF NUCIIAR STATION CHEMISTRY INSTRUC 2QNv . ..
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Title:
Oparation of Orion 701 Ion l No.:08-S-04-109 i Rsvisicn: 0 l Pcge: 6 l l Analyzer l l l l (10) Using the calibration curve, determine the concentration of the unknown.
7.0 DOCUMENTATION /COPSICTIVE ACTION 7.1 Enter op'erator's initials and date check performed on standardization card attached to the instrument.
I.2 Document results on proper reporting for=s as per Chemistry Procedure 08-S-03-3. .
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Attechment 8 to AECM-82/339 Pagn 1 of 4 Applicability of On-Line Instrumentation Post Accident Sampling (NUREG 0737 - II.B.3)
This attachment provides additional information in support of the NRC's review of the post accident sampling system, specifically, NRC Question #281.9 and Operating License Condition 2.C.44.c(iii). This data supports the qualification on the Grand Gulf on-line post accident sampling instrumentation and is supplied for the following components:
- 1. pH probe
- 2. Chloride ion analyzer
- 3. Hydrogen analyzer
- 4. Disolved oxygen analyzer
- 5. Conductivity cell The design specification for this system requires proper system operation over a 200 day accident duration. The minimum radiation qgalification requirement for local environmental conditions is 3.8 x 10 R (200 day, integrated dose). Material selection for piping and tubing comply with the ASTM material requirements of ANSI B31.1-1973.
Information presented in the following sections cites radiation testing of components identical or similar to those used in the Grand Gulf system. In some cases a review was conducted to identify those materials which are radiation sensitive and in a potentially high radiation environment. The information presented demonstrates that material based failures and malfunc-tions are not expected. In addition, the major portion of electronics associ-ated with this system are located in a mild environment are not expected to be exposed to extreme pressure, temperature, humidity, or radiation conditions.
Additional information on accuracy and range of the subject instruments was provided as a revised response to NRC Question 281.9 (GCNS FSAR Amendment 54, March, 1982).
It is MP&L's intent to continue its review in the area of the applica-bility of on-line post sampling instrumentation, cs part of an overall program to evaluate post accident sampling facilities and procedures. As coolent activities build to normal equilibrium levels, sample results from the on-line instrumentation will be compared and evaluated against results obtained from grab samples analyzed via NRC approved analytical procedures. A report will be filed with the NRC on the comparison of on-line vs. grab sample results to demonstrate the reliability of on-line instrumentation and to further demon-strate the applicability of this instrumentation for its intended use. This report will be submitted for IIRC review 6 months af ter exceeding 5% power, but no later than June 1, 1983.
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Attachment 8 to AECM-82/339 Page 2 of 6
- 1. pH Probe Testing was conducted on an L&N pH probe (L&N Cat. 1174951 similar to that installed in the Grand Gulf system. The results obtained have been determined by the system supplier to be applicable to the Grand Gulf system, pH probes with three5 dif ferent buf fer sogutions were exposed to radiation dose rates of 3 x 10 R/hr and 9.77 x 10 R/hr, respectively. Togal exposure on the internal reference probe was approximately 2 x 10 rads of gamma radiation (Co-60). The pH readings prior to an at the end of the exposure period for the three buffer solutions are given in Table 1 of this attachment. There were no significant changes in the behavior of the pH clectrodes during the exposure period as shown in Table 1.
- 2. Chloride Ion Analyzer GCNS Model: Orion 1617 Theionelectrodesutilizedgnthechlorgdeanalyzerhavebeenexposedto dose rates of between } x 10 and 1.5 10 rad /hr up to a total integrated dose (TID) of 1.5 x 10 rads. The source used was Co-60 and the tests were conducted at the Atomic Energy of Canada's Chalk River Laboratory 7 (March, 1975). The electrodes performed without failure up to 1.5 x 10 rads TID. Test results are available at the Orion Research, Inc. Company in Cambridge, Massachusetts. All other radiation sensitive components, such as solid state electronics, are located outside the high radiation fields.
- 3. Hydrogen Analyzer GCNS Model: Delphi/BIE-1B1 The hydrogen analyzer installed at Grand Gulf is similar in materials of construction and operation to the Comsip KIII system in which hydrogen determination is performed by thermal conductivity. The Comsip KIII system, per the Nuclear Safety Handbook of Post Accident Instrumentation (4/81)gnalysis Center conforms (NSAC):
to IEEE-323-1974. In the hydrogen analyzer in place at Grand Gulf, there are no solid state electronics or radiation sensitive components in close proximity to high radiation field other than the 0-rings in the cell and the neoprene diaphragm in the pump.
2 The 0-rings in the cell age made of Viton which show no incipient radiation damage below 10 rads. The pump diaphragm is made of neoprene and has been exposed to 106 rads of gamm detectable degradation of the diaphragm.g radiation (Co-60) with no The above data on material performance under high radiation exposure has been determined by the system supplier to be applicable to the Grand Gulf hydrogen analyzer.
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Attachment 8 to AECM-82/339 Page 3 of 4
- 4. Dissolved Oxygen Analyzer GGNS Model: Hays #62606 An evaluation of the Grand Gulf dissolved oxygen analyzer established that the radiation sensitive materials in this device consist of polyvinyl chloride and Buna-N (nitrile rubber) 0-rings. The relative radiatiog resistance of these materials for total integrated doses of up to 10 rads has been reported on in the literature. Reference 3 indicates that both 6
materials can withstand, without damage, of up to 10 rads.
The solid state components for this instrument are housed in instrument racks outside the high radiation fields.
- 5. Conductivity Cell GGNS cell: L&N 4801-1-04-11-91; Read out Model 7075-1 Testing: None Thel &Nconductivitycelldoesnotcontainmaterialswhicgaresusceptible to radiation damage for accumulated doses of less than 10 rads. Based on this and on its similarity to the pH probe, no radiation induced failure mechanisms are expected.
REFERENCES Lechnick, An Evaluation of On-line Boron Analyzer. NSAC-46 Captial 1982.
2 S. P. Carfagno and R. J. Gibson, " Review of Equipment Aging Theory and Technology," EPRI Report NP 1558 (9/1980).
NSAC: Handbook of Post Ace'ident Instrumentation (4/81).
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Attachment 8 to AECM-82/339 Page 4 of 4 Table 1 EFFECT OF RADIATION ( ON AN INTERNAL REFERENCE pH PROBE (L & N CAT #117495) pil at 5 Pil at $
Initial pil 3 x 10 9.77 at 10 Type Buffer Solution No Radiation R/llr R/Hr Kil PO 4
4.60 4.60(a) 4.50 2
7.05 7.06 6.93 Kil2PO4 + Naoli K2003 ' 0 OH 10.10 10.13(a) 10.12 3 3+
"No change in pH from the instantaneous reading was noted over a 5-10 minute exposure period.
6 Total exposure = 2 x 10 rads.
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