ML20040C794
| ML20040C794 | |
| Person / Time | |
|---|---|
| Site: | Byron, Braidwood, 05000000 |
| Issue date: | 01/22/1982 |
| From: | Tramm T COMMONWEALTH EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8201290245 | |
| Download: ML20040C794 (32) | |
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Commonwealth Edison O.. One First National Pitza, Chicago, !!!inois C9 Address Reply to: Post Office Box 767 Chicago, tilinois 60690 Janua ry-22, 1982 N
e Mr. Harold R.
Denton, Director Office of Nuclear Reactor Regulation 8
U.S. Nuclear Regulatory Commission NECEfij;g i
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. Washington, DC 20555
Subject:
Byron Station Units 1 and 2 b d
r c Braidwood Station Units 1 and 2 4
/d Advance FSAR Information
/
O NRC-Docket Nos.- 50-454/455/456/457 I
Dear Mr. Denton:
This is to provide advance copies of information which will be included in the Byron /Braidwood FSAR in the next amendment.
Attachment A to~ this letter lists the information enclosed.
One (1) signed original and fifty-nine (59) copies of this letter are provided.
included for your review and soproval.Fif teen (15) copies-of the enclosures are Please ~ address further questions to this o ffice.
Very truly yours, f) $L
[ T. R.
Tramm Nuclear Licensing Administrator Pressurized Water Reactors Attachment 3129N 3 00/
/I 8201290245 820122 W
PDR ADOCK 05000
Attachment A List of Enclosed Information
~I.
FSAR Question Responses Revised:
022.25 II.
FSAR Text Changes New Subsection 10.3.5.5 New Attachments 10.A and 10.B III.
Miscellaneous Items 2 RSB Open Items (Revised Responses)-
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RSB Open Item #8 Maintenance of adequate minimum flow through centrifugal charging pumps following secondary side high energy line rupture.
RESPCNSE (Revised 1/22/821 IE Bulletin 80-17 describes conditions which could 'cause damage to centrifugal charging pumps because of a lack of minimum flow through the pumps.
The exact design to be employed at the Byron /Braidwood plants to ensure minimum charging pump flow following a secondary side high energy line rupture has not been determined.
However, we anticipate add-ing a relief valve or valves to the mini-flow lines with a set pressure established to prevent the charging pump from reaching a dead head condition.
A permanent fix will be developed, approved and installed by fuel load.
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Reactor Systems' Branch ~ Item Address the capability to depressurize the RCS from the hot standby condition to cold shutdown utilizing only safety grade equipment.
RESPONSE
(Revised-1/22/82).
Our. plant design does not include the capability to depressur-ize the RCS with only safety grade equipment.
However, the PORV's are Class 1 valves, with qualified Class lE solenoid air-operators.
Therefore, their control power is supplied from qualified emergency buses.
The normal air supply to these valves is not safety grade, however, there are backup nitrogen accumulators that are seismically qualified.
The valves and operators for all intents and purposes, function as safety grade valves, and are lacking only qualification documentation.
Because the PORV's are not qualified for operation in an adverse environment, it is necessary to ensure that the environmental conditions in the containment do not compromise the operation of the PORV during depressurization.
The steam discharged from the pressurizer via the PORV's is directed to the PRT, hence, the integrity of the PRT must be maintained to ensure that the containment environment is not affected by the depressurization operation.
The_PRT, as described in FSAR Subsection 5.4.11, is designed to absorb a discharge of steam equivalent to 110% of the full power pressurizer steam volume without exceeding pressure and temperature design values.
The volume of steam vented from the pressurizer to depressurize
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the plant from a hot standby to a cold shutdown condition is not necessarily less than the volume of steam at 110% power.
However, the rate of release is significantly lower and can be controlled to ensure that the integrity of the PRT is maintained.
The depressurization operation can be halted at any - time to cool and drain the PRT which allows a greater volume of steam to be discharged without compromising the integrity of the PRT.
Hence we have concluded that depressuri-zation via the PORV's will not cause an environment in the containment that is adverse to the operation of the PORV's.
A precaution will be added to the procedures to state that' the integrity of the PRT must be maintained during this mode of depressurization.
The ability to depressurize using the PORV's without rupturing'the PRT will be demons trated on the Byron /Braidwood simulator.
B/B r
l In the event of loss of offsite power, the air compressors can be manually loaded onto the emergency buses to provide air supply to the valves in the auxiliary spray path providing the preferred method of plant.depressurization in the event of loss.of offsite power.
We are confident that we can achieve cold shutdown with the equipment installed in the plant.
The plant design is such that hot shutdown is attained by the use of safety grade equipment.
The capability to achieve cold shutdown within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> is present, however not with totally safety grade equipment.
Furthermore, other than NUREG-0800, there are no requirements for the PORV's to be safety grade since they are not required for critical accident prevention, safe shutdown, and' accident consequences mitigation safety function.
For the Byron and Braidwood Plants, safe shutdown is defined as hot shutdown.
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B/B-FSAR 10.3.5.4 Eff ect of Chemistry control on Iodine Partition The same conditions that are established to reduce corrosion in the secondary system is also effective in reducing iodine emissions in steam.
Maintaining an elevated system pH through chemical addition wiil hold the partition factor between the
' steam generator liquid and potential release points to a low value.
Maintaining a Icw iodine concentration in the steam generator through continuous blowdown will further reduce the absolute value of iodine released.
A main condenser iodine partition factor of 0.15 was used (Reference 1, pg. 2-23).
10.3.5.5 Secondary Water Chemist'ry Monitoring The proposed secondary water chemistry monitoring program for Byron Station is described in Attachment 10.A.
The proposed secondary water chemistry monitoring program for Braidwood Station is described in Attachment 10.B.
10.3.6 Steam and Feedwater System Materials This section describes those portions of the Main Steam and Main Feedwater Systems that are designed and constructed in accordance with ASME Section III requirements for Class 2 systems and the Auxiliary Feedwater Systems which are designed and constructed in accordance with requirements for Class 3 systems.
10.3.6.1 Fracture Toughness i
The design specification states that impact testing ir not required for the pressure-retaining components of the Main Feedwater and Main Steam Systems per Article NC 2311 of the ASME Code, Secticn III.
All piping within the auxiliary feedwater systems is 6 inches in nominal diameter and smaller and is therefore explicitly exempted from impact testing per Article ND 2311 of the ASMS Code,Section III.
10.3.6.2 Materials Selection and Fabrication The following statements provide specific information on materials selection and fabrication:
1.
For Category I main steam piping, the material selection is SA 155 Gra.de EC65 Class 1 Welded plate pipe.
For Category I main feedwater and auxiliary feedwater, the material selectica is seaml ce c,arbon steel, SA 106 Grade B.
These materials are listed in ASME ESPV Code Appendix I of Section III.
For Category II main steam and feedwater piping, the same ASTM materials are used.
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B/B-FSAR e
I 2.
There are no austenitic stainless steel components in the Auxiliary Feedwater Systems.
3.
Cleaning, painting, packaging, shipping, receiving, storage, and housekeeping are performed in accordance with the applicable guidelines of ANSI N 45.2.1, ANSI N 4 5. 2. 2, and ANSI N 45.2.3.
4.
There are no low-alloy steel components within the Main Steam, Main Feedwater, and Auxiliary Feedwater Systems.
5.
Inasmuch as all main feedwater and auxiliary feedwater piping is carbon steel, there are no supplementary requirements for welders.
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10.3-7
o BYRON-FSAR ATTACHMENT 10.A PROPOSED SECONDARY WATER CHEMISTRY MONITORING PROGPMI FOR BYRON STATION UNITS 1 AND 2 l
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10.A-0
BYRON-FSAR BYRON PROPOSED SECONDARY WATER CHEMISTRY MONITORING PROGRAM 1.
Identificatica of a sampling schedule for the critical parameters and of control points for these parameters; Tables 1-7 identify the sampling frequency and control points for secondary system. critical parameters.
TABLE #1 Steam Generator Chemistry For Cold Hydro < 200*F/ Cold Wet Layup/*1 Critical Parameter Sample Frequency Control Point ph @ 25 C 1/ week 10.0 - 10.5 Free Hydroxide as 1/ week ND ppm CACO3 Chloride, ppm 1/ week 0.5 1
Ammonia, ppm 1/veek As pH zequires
- 2 Hydrazine, ppm 1/ week 75-105 Dissovled Oxygen, ppb 1/ week 100
- 1.
Condensate quality makeup water shall be used exclusivley in achieving these conditions.
D' ring cold Hydro, some decomposition of hydrazine is anticipated;
- 2.
u sufficient hydrazine should be added with the makeup to re-establish the Cold Wet Layup conditions at completion of the test.
t' 10.JN-1 s
BYRON-FSAR TABLE #2 Steam Generator Chemistry For Hot Functional Tests and Hot Shutdown Conditions *1 Temperatures > 200*F < 350*F *4 Critical Parameter Sample Frecuency Control Point
- 2 pH @ 25'C Daily 8.5 - 10.0 Free Hydroxide as Daily 0.15 ppm CACO3 3
Cation Condugtivity Daily 7.0 umhos/cm 025 C
- 1.
Feedwater (Auxiliary Feedwater) shall be of condensate makeup quality to which ammonium hydroxide and hydrazine are added at the inlet into the steam generator for pH and dissolved oxygen control.
- 2.
Departure from the normal 8.5-9.0 pH range allows for increased N'd 3
resulting from decomposition of hydrazine used for steam generator,
system layup.
- 3.
During startups, up to 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> from initiation of plant loading, additional latitude from normal operation specifications is provided because increased 1cvels of contaminants are anticipated.
- 4.
Tabic #2 is designed to cover Hot Shutdown chemistry conditions during system heat up.
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10.A-2
BYRON-FSAR TABLE #3 Steam Generator Chemistry For Hot Shutdown / Hot Standby Temperatures > 200*F Critical Parameter Sample Frequency Control Point pH @ 25*C Daily 8.5 - 9.0 Free Hydroxide as Daily 0.15 ppm CACO3 Cation Conductivity Daily 2.0 umhos/cm @25'C
- 1
[ Table #3 is designed to cover Hot Shutdown, Hot Standby conditions Iduring system cool down.
If the unit is' to proceed to cold wet lay
- up, follow the chemistry requirements given in Table #1.
TABLE #4 Steam Generator Chemistry For Startup From Hot Standby Critical Parameter Sample Frequency Control Point
- I pH Q 25 C Daily 8.5 - 10.0
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Free Hydroxide as Daily 0.15 ppm CACO 3
- 2 Cation Conductivity Daily 7.0 umhos/cm G 25 C x
- 1.
Departure from the normal 8.5 - 9.0 pH range allows for increased NH}ayup l
resulting from decomposition of hydrazine used for feedwater systen
- 2.
During startups, up to 96* hours from the initiation cf plant loading, additional latitude from normal operating specifications is provided
, because increased levels of contaminants are anticipated.
NOTE:
During startup, chemical impurities will be controlled by steam generator blowdown.
10.A-3.
BYRON-FSAR s
4 TABLE #5 Steam Cenerator Chemistry For Normal Power Operations *1 i
Critical Parame ter Sample Frecuency Control Point pH @ 25 C Daily 8.5 - 9.0 Free Hydroxide as Dsily 0.15 ppm CACO3 Cation Conductivity Daily 2.0 umho/cm @ 25 C
- 1 During normal power operations, chemical icpurities will be controlled by steam generator blowdown.
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BERON-F5AR
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TABLE #6 Feedsat'er Chemistry
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For Startup.Trom Hot Standby Critical Paraceter Sample Frecuency Control Point
- I pH @ 25 C Daily 8.8 - 10.0 s
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- 2 Hydrazine, ppa Daily 02 + 0.005 e
Dissolved Oxygen, ppb Daily 100 i
TABLE #7 Feedwater Chemistry For Normal Power Operation i
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Critical Paraneter Sample Frequency Control Point pH G 25 C Daily 8.8 - 9.2
- 2 Hydrazine, ppm Daily 02 + 0.005
- .' N Dissolved Oxygen, ppb Daily 5
- 1.
Departure from the normal S.8 - 9.2 pH range allows for increased NH resulting from decomposition of hydrazine used for feedwater 3
system layup.
- 2.
Hydrazine level should exceed the oxygen level by_5 ppb.
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BYRON-FSAR BYRON PROPOSED SECONDARY WATER CHEMISTRY MONITORING PROGRAM 2.
Identification of the procedures used to measure the value of the critical parrmeters; 2.
The following is a list of the procedures which will be used to measure the critical parameters stated in Question One.
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.I Byron Procedure Name Number
.. Determination of Dissolved oxygen BCP 100-1 Determination of Chloride, by Titration BCP 100-5 Determination of Hydrazine BCP 110-4 Determination of pH BCP 120-2 Determination of Free Hydroxide BCP 120-4 Determination of Ammonia, by electrode BCP 120-5 Determination of Cation Conductivity BCP 150-2 O
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10.A-6
BYRON-FSAR
' I BYRON PROPOSED SECONDARY WATER CilEMISTRY MONITORING PROGRAM 3.
Identification of process sampling points; The steam generator sample points are located in the steam generator sample panel (# OPS 0lJ) which is located in the hot lab.
The sample panel is common to both units and consists of individual sople points for each of the four steam generators plus 4t:-line detection capability for measuring pil, cation conductivity and sodiuu.
1he main feedwater sample points are located in sample panels
(# IPS06J and 2PS06J) which are located in the secondary system sample rooms.
Each sample panel has in-line detection capability for measuring pH, Specific Conductivity, hydrazine, dissolved oxygen, and gurbidity.
In addition, grab samples may be taken at each panel for analysis in the laboratory.
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e 10.A-7
BYRON-FSAR BYRON PROPOSED SECONDARY k'ATER CHEMISTRY EGNITORING PROGRAM a4.
Procedure for the recording and management of data; The recording and management of chemistry data will be as follows:
A.
The chemistry parameters identified in question one, Tabic #1, will be recorded weekly on the secondary system analysis work sheets.
The chemistry parameters identified in question one, Tables #2 thru #7, will be recorded daily, on the secondary system analysis work sheets.
B.
The Chemistry Department personnel will review all chemistry results daily.
Out of spec items will be identified and corrective action taken as per question five.
C.
Daily results will be recorded on a Secondary System Data Form.
This form will contain the chemistry results of the steam generators, feedwater, condensate and condensate storage tanks. Additional information will include per cent power and steam generator blowdown rates.
D.
The following critical parameters will be plotted on a daily basis; For Steam Generators i
1.
pH 2.
Free Hydroxide 3.
Cation Conductivitiy For Feedwater 1.
pH 2.
Hydrazine 3.
Dissolved oxygen E
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10.A-8
BYRO11-FSAR BYRON PROPOSED SECONDARY WATER CHEMISTRY MONITORING PROGRAM 5.
Procedures detining corrective actions for off-control point chemistry conditions; At this time abnormal chemistry operating procedures have not been-written.
Therefore, procedure numbers governing corrective action cannot be listed. However, is is felt that a program which provides for cation conductivity control will also satisfy the requirements for out of spec -
free hydroxide and high pH conditions.
The philosopy behind Byron station's off - control point Chemistry will be as follows;.
When cation _ conductivity exceeds 2.0 umhos but is less than 7 a.
umhos reduce load to less than 50%.
b.
When cation conductivity exceed 7.0 uthos proceed to hot chu tdown.
If the source of the high cation conductivity is located and c.
isolated,_ unit operation at 50% power or less may continue for a maximum of 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, provided cation conductivity does not exceed 7 umhos.
If at the end of t'ne 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> period, the trend of the cation conductiv'ity is decrer;ing, the unit may continue operations at or below 50% power.
If-there is no improvement, j
the unit must proceed to Hot Shutdown.
Since cation conductivity is the most sensitive analysis for determining condenser tube leaks, we feel this procedure also satisfies the requirements for out of spec free hydroxide and high pH concentrations.
5 10.A-9
J BYRON-FSAR BYRON PROPOSED SECONDARY WATER CHEMISTRY MONITORING PROGRAM 6.
A procedure identifying (a) the authority responsible for the interpretation of the data and (b) the sequence and timing of administrative events required to initiate corrective action; A.
The authority responsible for interpretation of data vill be as follows:
1.
A chemist is responsible for interpreting and recommending corrective action on any out of spec chemistry condition.
2.
In the absence of the chemist, the Station Chemist will assume the responsibility of data interpretation and corrective action.
3.
In the absence of both the Chemist and the Station Che=ist, the Radiation Chemistry Supervisor is responsible for data interpretation and corrective action.
B.
The sequence and timing of administrative events required to initiate corrective action will be as follows; 1.
The Radiation Chemistry Technician analyzing the sample is responsible for reporting any out of spec chemistry condition to g
his or her immediate supervisor. On day shift, this will be the Radiaticn Chemistry Foreman, on backshif ts, this will be t
the Shift Engineer.
2.
Af ter being informed of an out of spec condition the Radiation Chemistry Foreman or the Shif t Engineer will notify the appropriate Chemist.
If the Chemist is unavailable, the Station Che=1st will be notified.
If both the Chemist and Station Chemist are unavailable, the' Radiation Chemistry Supervisor will be notified.
3.
Once notified, Chemistry Department personnel will evaluate the situation and make appropriate recommendations for corrective acticn to the Shift Engineer.
4.
The above sequence of events should be intiated within S hours from the time the sample is reported out of spec.
10. ;b-10
BRAIDWOOD-FSAR ATTACHMENT 10.B PROPOSED SECONDARY WATER CHEMISTRY MONITORING PROGRAM FOR BRAIDWOOD STATION UNITS 1 AND 2 i
e 10.B-0
BRAIDWOOD-FSAR BRAIDWOOD PP,0 POSED SECONDARY WATER CHEMISTRY MONITORING PROGRAM 1.
Identification of a sampling schedule for the critical parameters and of controi points for these parameters; Tables 1 7 identify the sampling frequency and control points for secondary system critical parameters.
TABLE #1 1
Stean Generator Chemistry For Cold Hydro / Cold Wet Layup/*1 Temperature < 200*F Critical Para =eter Sample Frequency Control Point ph 0 25 C 1/ week 10.0 - 10.5 Free Hydroxide as 1/ week ND
- ppm CACO3 Chloride, ppm 1/ week 0.5
, Ammonia, ppm 1/ week As pH requires Hydrazine, ppm 1/ week 75-105
'Dissovled Oxygen, ppb 1/ week 100 3
- 1 Condansate quality makeup water shall be used exclusivley in achieving these conditions.
- 2.
During cold Hydro, some decomposition of hydrazine is anticipated; sufficient hydrazine should be added with the makeup to rc-establish tiie Cold Wet Liyup conditions at completion of the test.
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BRAIDWOOD-FSAR TABLE #2 Steam Generator Chemistry For Hot Functional Tests and Hot Shutdown Conditions *1 Temperatures > 200*F < 350*F *4 Critical Parameter Sample Frequency Control Point
- 2 pH @ 25'C Daily 8.5 - 10.0 Free Hydroxide as Daily 0.15 ppm CACO3
- 3 Cation Conductivity Daily 7.0 umhos/cm @25 C
- 1.
Feed' water (Auxiliary Feedwater) shall be of condensate makeup quality to which ammonium hydroxide and hydrazine are added at the inlet into the steam generator for pH and dissolved oxygen control.
- 2.
Departure from the normal 8.5-9.0 pH range allows for increased NH 3 resulting from decomposition of hydrazine used for steam generator system layup.
- 3.
During startups, up to 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> from initiation of plant loading, additional latitude from normal operation specifications is provided because increased levels of contaminants are anticipated.
- 4.
Tabic #2 is designed to cover Hot Shutdown chemistry conditions during
' system heat up.
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, BRAIDWOOD-FSAR t
TABLE #3 Steam Generrtor Chemistry For Hot Shutdown / Hot Standby Temperatures > 200*F Critical Parameter Sample Frequency Control Point pH 6 25*C Daily 8.5 - 9.0 Free Hydroxide as Daily 0.15 ppm CACO3 Cation Conductivity Daily 2.0 umhos'/cm @25'c
- 1 Table #3 is designed to cover Hot Shutdown, Hot Standby conditions during system cool down.
If the unit is to proceed to cold wet lay up, follow the chemistry requirements given in Table #1.
TABLE #4 Steam Generator Chemistry For Startup From Hot Standby 4
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Critical Parameter Sample Frequency Control Point pH @ 25 C Daily 8.5 - 10.0 i
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Free Hydroxide as Daily 0.15 ppm CACO3
- 2 Cation Conductivity Daily 7.0 umhos/cm G 25 C
- 1.
Departure from the normal 8.5 - 9.0 pH range allows for increased NH resulting from decomposition of hydrazine used for feedwater system fayup.
- 2.
During startups, up to 96 hours0.00111 days <br />0.0267 hours <br />1.587302e-4 weeks <br />3.6528e-5 months <br /> from the initiation of plant loading, additional latitude from normal operating specifications is provided b'ecause increased levels of contaminants are anticipated.
NOTE:
During startup, chemical impurities will be controlled by steam generator blowdown.
10.B-3
BRAIDWOOD-FSAR e
TABLE #5 Steam Generator Chemistry For Normal Power Operations *1 Critical Parameter Sample Frequency Control Point pH @ 25 C Daily 8.5 - 9.0 Free Hydroxide as Daily 0.15 ppm CACO3 Cation conductivity Daily 2.0 umho/cm 0 25 C
- 1 During normal power operations, chemical impurities will be controlled by steam generator blowdown.
9 10.B ~
BRAIDWOOD-FSAR TABLE #6 Feedwater Chemistry For Startup From Hot Standby Critical Parameter Sample Frequency Control Point
- I pH @ 25 C Daily 8.8 - 10.0
- 2 Hydrazine, ppm Daily 02 + 0.005 Dissolved Oxygen, ppb Daily 100 TABLE #7 Feedwater Chemistry For Normal Power Operation Critical Parameter Sample Frequency Control Point pH @ 25 C Daily 8.8 - 9.2 Hydrazine, ppm Daily 02 + 0.005 Dissolved oxygen, ppb Daily 5
- 1.
Departure from the nornal S.8 - 9.2 pH range allows for increased Nil resulting from decomposition of hydrazine used for feedwater 3
system layup.
- 2.
Hydrazine level should exceed the oxygen level by 5 ppb.
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BRAIDWOOD-FSAR BRAIDWOOD PROPOSED SECONDARY WATER CHEMISTRY MONITORING PROGRAM 2.
Identification of the procedures used to measure the value of the critical paraneters; The following is a list of the procedures which will be used to measure the critical parameters stated in Question One.
Braidwood Procedure Name Number Determination of Dissolved Oxygen BrCP 100-1 Determination of Chloride, by Titration BrCP 100-5 Determination of Hydrazine BrCP 110-4 Determination of pH BrCP 120-2 Determination of Free Hydroxide BrCP 120-4 Det$rminationofAmmonia,byelectrode BrCP 120-5 Determination of Cation Conductivity BrCP 150-2 10.B-6
, BRAIDWOOD-FSAR BRAIDWOOD PROPOSED SECONDARY WATER CHEMISTRY M0NITORING PROGRAM 3.
Identification of process sampling points; The steam generator sample points are located in the steam generator sample panel (# OPS 01J) which is located in the hot lab.
The sample panel is common to both units and consists of individual sample points for each of the four steam generators plus in-line detection capability for measuring pH, cation conductivity and sodium.
'Ihe main feedwater sample points are located in sample panels
(# IPS06J and 2PS06J) which are located in the secondary system sample room.
Each sample panel has in-line detection capability for ceasuring pH, Specific Conductivity, hydrazine, dissolved oxygen, and turbidity.
-l In addition, grab samples may be taken at each panel for analysis in the laboratory.
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BRAIDWOOD-FSAR
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BRAIDWOOD PROPOSED SECONDARY WATER CHEMISTRY MONITORING PROGRAM 4.
Procedure for the recording and management of data; The recording and management of chemistry data will be as follows:
A.
The chemistry parameters identified in question one, Table #1, will be recorded weekly on the secondary system analysis work sheets.
The chemistry parameters identified in question one, Tables #2 thru 7, will be recorded daily, on the secondary system analysis work sheets.
B.
Chemistry Department personnel will review all chemistry results daily.
Out of spec items will be identified and corrective action taken as per question five.
C.
Daily results will be recorded on a Secondary System Data Form.
This form will contain the chemistry results of the steam generators, feedwater, condensate and condensate storage tanks. Additional information will include per cent power and steam generator blowdown rates.
D.
The following critical parameters will be plotted on a daily basis; For Steam Generators 1.
pH 2.
Free Hydroxide 3.
Cation Conductivitiy For Feedwater 1.
pH 2.
Hydrazine 3.
Dissolved oxygen 4
f 10.B-8
DRAIDWOOD-FSAR e
BRAIDWOOD PROPOSED SECONDARY WATER CHEMISTRY MONITORING PROGRAM 5.
Procedures defining correctise actions for off-control point chemistry conditions ;
At this time abnormal chemistry operating procedures have not been written. Therefore, procedure numbers governing corrective action cannot bc listed.
However, is is felt that a program which provides for cation conductivity control will also satisfy the requirements for out of spec free hydroxide and high pH conditions.
The philosopy behind Braidwood stations off - control point Chemistry will be as follows; a.
When cation conductivity exceeds 2.0 unhos but is less than 7 umhos reduce load to less than 50%.
b.
When cation conductivity exceed 7.0 umhos proceed to hot shutdown.
c.
If the source of the high cation conductivity is located and I
isolated, unit operation at 50% power or less may continue for a maximum of 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />, provided cation conductivity does not exceed 7 umhos.
If at the end of the 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> period, the trend 4
of the cation conductivity is decreasing, the unit may continue
{
operations at or below 50% power.
If there is no improvecent, j
the unit must proceed to Hot Shutdown.
i' Since cation conductivity is the most sensitive analysis for determining condenser tube leaks, we feel this procedure also satisfies the requirements for out of spec free hydroxide and high pH concentrations.
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BRAIDWOOD-FSAR
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BRAIDWOOD PROPOSED SECONDARY WATER CHEMISTRY MONITORING PROGRAM 6.
A procedure identifying (a) the authority responsible for the interpretation of the data and (b) the sequence and timing of administrative events required to initiate corrective action; A.
The authority responsible for interpretation of data will be as follows:
1.
A Chemist, for each respective unit, is responsible for interpreting and recommending corrective action on any out of spec chemistry condition.
2.
In the abs 2nce of the Chemist, the Station Chemist will assu=e the responsibility of data interpretation and corrective action.
3.
In the absence of both the Chemist and the Station Chemist, I
the Radiation Chemistry Supervisor is responsible for data i
interpretation and corrective action.
l B.
The sequence and timing of administrative events required to initiate corrective action vill be as follows; 1.
The Radiation Chemistry Technician analyzing the sample is responsible for reporting any out of spec chemistry condition to his or her immediate supervisor.
On day shift, this will be the Radiation Chemistry Foreman, on backshif ts, this will be the Shift Engineer.
2.
Af ter being informed of an out of spec condition the Radiation Chemistry Forc=an or the Shif t Engineer will notify the appropriate chemist.
If the Chemist is unavailable, the Station Chemist
'i will be notified.
If both the Chemist and Station Chemist are unavailable, the Radiation Chemistry Supervisor vill be notified.
3.
Once notified, chemistry departtent personnel vill evaluate the situation and make appropriate recommendations for corrective actica to the Shift Engineer.
4.
The above sequence of events should be intiated within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> from the time the sample is reported out of spec.
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PC/at/M9/D 10.B-10
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'B/B-FSAR Spray switchover begins at 20.9 minutes, and is completed when 21.6 minutes have elapsed, consuming an additional 10,080. gallons.
Total cumulative volume used is 381,904 gallons.
At this time 24,948 gallcas are still available 2
one volume inaccuracy above the nominal empty alarm setpoint.
See Table Q22.25-1.
Whcn containment spray i~s initiated 25 seconds after the stLrt of injection, the operator verifies that flow is present from the spray additive tank for both trains.
Assuming the single failure is failure of the spray additive eductor valve to open.
The operator turns off the pump in the train with the failed valve.
In this mode of operation, the cumu-lative volume used at the time ECCS switchover is complete is 262,496 gallons.
While the ECCS pumps are operating from the recirculation sump, the one operating spray pump continues to take suction f rom the RWST until the RWST level is one volume inaccuracy above the nominal empty alarm se: point.
This occurs at 31.7 minutes.
At this time the spray pump is switched to the recirculation mode.
Spray switchover is complete at 32.4 minutes.
In order to obtain the long term required sump pH, a minimum of 2100 gallons of 30% NaOH is required from the spray additive tank.
After 32.4 minutes, another 357 gallons is required to be added.
This can be accomplished by continuing caustic addition for another 6.5 minutes while the spray pump is taking suction from the sump.
See Table Q22.25-2.
Operator Actions The parameters used by the operator to determine when to initiate containment spray switchover to recirculation are 1)'
Spray additive tank level 2)
RWST level Regardless of what the single failure is or when it occurs, the above parameters are the only indicators the operator needs to determine when to initiate switchover.
Spray switchover is normally initiated when the spray additiv2 tank 1cvel alarm indicates the required amount of NaOH has been added to achieve the required level of final sump pH.
In the abnormal case where the spray additive level alarm dees k
not initiate before the RWST " Empty" alarm initiates, spray
/
switchover is initiated when the RWST " Empty" alarm initiates.
022.25-2
' /.
-B/B-FSAR
'Two series of operations are required.to be accomplished by the operator to complete spray switchover:
Opening of the containment spray pump suction valve to the recirculation pump.and closing of the containment spray pump suction
~
. valve to the RWST.
Each valve has an opening and closing time of approximately 20 seconds, so.the total switchover can be accomplished in approximately 40 seconds.
i i
Q22.25-2a L -....... -
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