ML20138K414

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Rev 17 to OI 32, Hydrogen Sys Operation
ML20138K414
Person / Time
Site: Point Beach  NextEra Energy icon.png
Issue date: 01/25/1997
From:
WISCONSIN ELECTRIC POWER CO.
To:
Shared Package
ML20138K159 List: ... further results
References
OI-32, NUDOCS 9702180283
Download: ML20138K414 (25)
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  • i NUCLEAR POWER BUSINESS UNIT 0132 l

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OPERATING INSTRUCTIONS MINOR l Revision 17 l HYDROGEN SYSTEM OPERATION January 25,1997 RECORD PROCEDURE VERIFIED CURRENT AND C}ECKED FOR TEMPORARY CHANGE 5 IF RELD COPIES REQUIRED. USE PBF-002& IAW NP 12 4 AND DO EQI CONGtETE THIS DLOCK.

BY: DATE:

1.0 . PURPOSE 1.1 To line up the hydrogen banks for service, Section 3.0.

1.2 To replace hydrogen dryer hydrogen with CO2, Section 4.0.

1.3 To replace hydrogen dryer air with CO2, Section 5.0.

1.4 To increase generator hydrogen pressure while dryer is isolated, Section 6.0. i 1.5 To replace generator and hydrogen dryer hydrogen with CO2 , Section 7.0.

1.6 To replace generator CO2 with air, Section 8.0.

1.7 To replace generator and hydrogen dryer air with CO2, Section 9.0.

1.8 To replace generator CO2 with hydrogen, Section 10.0.

2.0 REFERENCES

.!R 96-006, NRC Inspection Report; NRC Commitment for Operations procedures PMT/QC reviews.

3.0 HYDROGEN BANK LINE-UP FOR SERVICE 3.1 Precautions and Limitati.Dat 3.1.1 Observe no smoking, welding, open flames and sparks precautions in the general area of the hydrogen gas system.

3.1.2 When the main hydrogen bank pressure reaches approximately 600 psig the l regulator begins to drift in the upward direction. j l

9702180293 970210 Page1of25 REFERENCE USE PDR ADOCK 05000301 . . . .

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, NUCLEAR POWER BUSINESS UNIT OI32 OPERATING INSTRUCTIONS MINOR

Revision 17
HYDROGEN SYSTEM OPERATION January 25.1997 3.2 Initial Conditions 3.2.1 The main hydrogen bank pressure has decreased to less than 400 psig, and the reserve bank is to be put on line.

OE 3.2.2 The hydrogen banks have been recharged, and the main hydrogen bank is to be put on line in place of the reserve bank.

3.3 Procedur.;

3.3.1 To place the reserve bank on in place of the main hank:

a. Shut HG-68, main bank header isolation.
b. Verify open HG-67, reserve bank header isolation.
c. Verify open HG-77, normal PCV outlet.
d. Open HG-75, normal PCV inlet.
e. Verify HG-57, normal PCV, set for 100-110 psig.

3.3.2 To valve in the main bank in place of the reserve bank:

't

a. Shut HG-67, reserve bank isolation.
b. Verify open HG-68, main bank header isolation.
c. Verify open HG-77, normal PCV outlet.
d. Open HG-75, normal PCV inlet.
e. Verify HG-57, normal PCV, set for 100-110 psig.

4.0 HYDROGEN DRYER PURGE FOR MAINTENANCE PURPOSES WHTIR MAINTAINING QENERATOR HYDROGEN PRESSURE 4.1 Precautions and Limitations 4.1.1 An explosive meter should be used to sample the general area during the hydrogen replacement evolution.

4.1.2 Observe no smoking, welding, open flames and sparks precautions in the general area of the hydrogen gas system. -

4.1.3 Do not exceed 10 psig in the carbon dioxide manifold.

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NUCLEAR POWER BUSINESS UNIT OI32 OPERATING INSTRUCTIONS MINOR Revision 17

HYDROGEN SYSTEM OPERATION January 25.1997 4.1.4 Hydrogen makeup flow to the generator will be secured during the performance of this procedure.

4.1.5 Hydrogen dryer valve HG-26 is throttled and should not be adjusted in this procedure.

4.2 Initial Conditions The generator is on line or pressurized with hydrogen and will be maintained at normal hydrogen pressure.

4.3 Procedure 4.3.1 Verify four (4) single carbon dioxide bottles are connected at the four (4) flexible hose connections with the bottle isolation valve shut.

4.3.2 Increase main generator hydrogen pressure to 60 psig by feeding the generator on the hydrogen regulator bypass, HG-52.

NOTE: Reference E+ecautions and Limitations 4'.M. For any additional make-up to thegeneratorseeSection 6.0.

l 4.3.3 Issue a red tag series to the DSS for the following valves:

HG-45. . Vent / purge i. solation from top of generator. SHUT HG-50. .. . Hydrogen inlet to generator root isolation . SHUT '

Add a note to the danger tag location sheet to reference 01-32 Section 6.0 for hydrogen addition to the generator while the hydrogen dryer is isolated.

4.3.4 Perform the following valve line-up:

HG-60..... .. Carbon dioxide manifold outlet... . .... ... .. . . .. SHUT HG-61. . .... CO 212 pack supply to manifold. . .. . . . . . . . . . . . . SHUT HG-53.. . . . LP regulator inlet . . ... . .. ... . . ......... ... ..... .. ...... S H U T HG-8. . . Hydrogen manifold supply to generator. SHUT HG-6.. .. Vent to atmosphere from bottom of generator.. . SHUT l HG-6A. . . Vent line loop seal isolation. SHUT l HG-44.. . Vent / purge isolation from bottom of generator. ... SHUT j HG-7... . Vent to atmosphere from top of generator. . OPEN i HG-5. . CO2supply to main generator.. OPEN

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NUCLEAR POWER BUSINESS UNIT OI32 OPERATING INSTRUCTIONS MINOR Revision 17

HYDROGEN SYSTEM OPERATION January 25.1997 NOTE
Power is secured due to noflowfor the tower blowers and also to ensure a tower shaft does not takeplace during the various phases of the dryerpurge.

The dryerpurge will beperformedin three steps: Moisture Cooler, Reactivation Tower, and Absorption Tower.

4.3.5 S* cure the hydrogen dryer by shutting valves HG-9 and HG-10 and opening the main power breaker:

Unit I at PP-5 BKR 13 Unit 2 at PP-8 BKR 11 4.3.6 Perform the following valve line-up to purge the gas cooler.

HG-30. Hydrogen dryer equalizing valve.. . . . SHUT HG-27. . H2 dryer water gas separation CO2 purge inlet . OPEN HG-29. H 2dryer water gas separation outlet.. SHUT HG-25. H 2dryer 4-way drying cycle outlet . . ..

OPEN HG-46. . H2dryer left tower CO2 Purge outlet.. . . .

OPEN HG-47. . H2dryer right tower CO2 Purge outlet . . . .. .OPEN l

HG-60.. .. CO 2header root isolation to main generator.. . ..... OPEN aCAUTIONa DO NOT EXCEED 10 PSIG IN THE CO2 MANIFOLD WHILE PURGING THE HYDROGEN DRYER. I i

l 4.3.7 Commence purging the gas cooler and piping by throttling open the CO2 supply from one of the four (4) individual manifold bottles or by use of HG-61, CO212 pack supply. Check for a pressure increase on the dryer tower outlet pressure gauge to verify CO2 flow Path through the cooler and piping. Purge for 5 minutes.

4.3.8 Upon completion of the cooler purge, isolate the CO2 supply and perform the I following valve line-up:

HG-29. . .... H 2dryer water gas separation outlet. .... . . . . . .

OPEN HG-25. .. . H dryer 2 4-way drying cycle outlet . . . . . . . .

SHUT HG-46. . . H dryer 2 left tower CO 2purge outlet. . . . .

SHUT HG-47.. .. H 2dryer right tower CO2 Purge outlet.. . .

OPEN HG-30. .. H dryer2 equalizing valve... . .. .. . .

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NUCLEAR POWER BUSINESS UNIT OI32 OPERATING INSTRUCTIONS MINOR Revision 17

- HYDROGEN SYSTEM OPERATION Januaw 2.0 1997 aCAUTION" DO NOT EXCEED 10 PSIG IN THE CO 2 MANIFOLD WHILE PORGING THE HYDROGEN DRYER.

4.3.9 Commence purge of the dryer tower by throttling the CO2 supply. Check tower pressu e gauge to verify CO 2 flow. Purge for 5 minutes.

, 4.3.10 Upon completion of the 5-minute purge, open HG-46 and shut HG-47.

j aCAUTION* DO NOT EXCEED 10 PSIG IN THE CO2 MANIFOLD WHILE PURGING THE HYDROGEN DRYER.

4.3.11 Continue purge of the towers while monitoring tower outlet pressure indication to verify CO2 flow. Purge for 5 minutes.

4.3.12 Upon completion of the second tower purge, shut the CO2 supply.

4.3.13 If maintenance is to be performed on the dryer, align the valves as follows and red tag:

i HG-9..... .. H 2dryer oil vapor filter inlet isolation . . .. ..... S H U T HG-10. . . Outlet isolation from hydrogen dryer.. ... ... . . ... ..... SHUT HG H 2dryer water gas separator purge inlet isolation . ... ... SHUT HG-46 . H2dyer left tower CO 2purge outlet . ..

SHUT HG-47 . H2dryer right tower CO2 purge outlet. . . SHUT Main power disconnect at base of dryer panel.. ... OPEN NOTE: Due to small volunse of the dryer towers the CO2 will not bepurged with air for maintenancepurposes.

4.3.14 At this point in the procedure, H2 make-up to the generator is isolated. If the dryer is to remain out-of-service for an extended period of time, see Section 6.0 for instructions on increasing generator hydrogen pressure while the dryer is isolated.

5.0 RETURNING THE HYDROGEN DRYER TO SERVICE WITH THE MAIN GENERATOR PRESSURIZED WITH HYDROGEN 5.1 Precautions and Limitations 5.1.1 An explosive meter should be used to sample the general area during the hydrogen restoration evolution.

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NUCLEAR POWER BUSINESS UNIT 0132 OPERATING INSTRUCTIONS MINOR Revision 17  :

3 HYDROGEN SYSTEM OPERATION January 25.1997 5.1.2 Observe no smoking, welding, open flames and sparks precautions in the general area of the hydrogen gas system.

5.1.3 Do not exceed 10 psig in the carbon dioxide manifold while purging the dryer.

5.1.4 Hydrogen make-up flow to the generator will be secured during the L performance of this procedure.

5.1.5 Hydrogen dryer valve HG-26 is throttled and should not be adjusted in this procedure.

5.2 Initial Conditions 5.2.1 The generator is on-line or pressurized with hydrogen and will be maintained at normal hydrogen pressure.

5.2.2 The hydrogen dryer is isolated and deenergized, and maintenance is complete.

5.3 Procedure 5.3.1 Verify four (4) single carbon dioxide bottles are connected at the four (4) flexible hose connections with the bottle isolation valve shut.

5.3.2 Perform the following valve line-up:

HG-60. . Carbon dioxide manifold outlet. . . SHUT HG-61. CO212 pack supply to manifold., SHUT HG-50. . Hydrogen inlet to generator root isolation . SHUT HG-53. . LP regulator inlet . . SHUT HG-8.. . . Hydrogen manifold supply to generator. . . SHUT HG-6.. . . Vent to atmosphere from bottom of generator. . . ... SHUT HG-44. .. Vent / purge isolation from bottom ofgenerator. . . .... SHUT HG-45. . ... Vent / purge isolation from top of generator. ......... . S H U T HG-7.. . ... Vent to atmosphere from top of generator.. . .. . .. . . . OPEN HG-5. ... ... CO supply 2 to main generator..... ... . .. . ... .. OPEN l

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HYDROGEN SYSTEM OPERATION January 25.1997

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NOTE: Power is secured due to noflowfor the tower blowers and also to ensure a tower shift does not takeplace during the variousphases of the dryerpurge.

The dryerpurge willbeperformedin three steps: Moisture Cooler, Reactivation Tower, and Absorption Tower.

5.3.3 Venfy the hydrogen dryer is secured with valves HG-9 and HG-10 shut and

. the main power breaker open:

Unit 1 at PP-5 BKR 13 Unit 2 at PP-8 BKR 11 5.3.4 Perform the following valve line-up to purge the gas cooler.

HG-30. . Hydrogen dryer equalizing valve. .. . SHUT HG-27. H2 dryer water gas separation CO2 purge inlet. .

OPEN HG-29. . H 2dryer water gas separation outlet . SHUT HG-25. . H2dryer 4-way drying cycle outlet. . . OPEN HG-46. - H2dryerleR tower CO2 purge outlet. . . .

OPEN HG-47 . H2 dryer right tower CO2purge outlet... . .. .. .. . OPEN HG-60.. CO2header root isolation to main generator . . OPEN 1

aCAUTION* DO NOT EXCEED 10 PSIG IN THE CO 2 MANIFOLD WHILE

, PURGING THE HYDROGEN DRYER.

5.3.5 Commence purging the gas cooler and piping by throttling open the CO2 1 supply from one of the four (4) individual manifold bottles or by use of HG-61, CO212 pack supply. Check for a pressure increase on the dryer tower outlet pressure gauge to verify CO2 flow path through the cooler and piping. Purge i for 5 minutes.  ;

5.3.6 Upon completion of the cooler purge, isolate the CO2 supply and perform the following valve line-up:

HG-29.. .. H2 dryer water gas separation outlet.. . . . . .

OPEN HG-25. ... . H2 dryer 4-way drying cycle outlet . SHUT HG-46.. . . H dryer 2 len tower CO2 Purge outlet. .

SHUT HG-47. . . . H dryer 2 right tower CO2 Purge outlet.. ..

OPEN I HG-30. . . H2 dryer equalizing valve.. . .. .. OPEN Page 7 of 25 REFERENCE USE

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, HYDROGEN SYSTEM OPERATION January 25.1997

5.3.7 Commence purge of the dryer tower by throttling the CO2 supply. Check i tower pressure gauge to verify CO2 flow. Purge for 5 minutes.

5.3.8 Upon completion of the 5-minute purge, open HG-46 and shut HG-47. '

aCAUTIONa DO NOT EXCEED 10 PSIG IN THE CO 2 3IANIFOLD WHILE PURGING THE HYDROGEN DRYER.

5.3.9 Continue purge of the towers while monitoring tower outlet pressure indication to verify CO2 flow. Purge for 5 minutes.

5.3.10 Upon completion of the second tower purge, shut the CO2 supply.

NOTE: Purging the CO2out of the dryer with hydrogen prior to placing the dryer in operation is not necessary due to its small volume 5.3.11 Perform the following va!ve line-up on the dryer:

HG-46. , . H dryer 2 left tower CO2 Purge outlet... . . . ..... SHUT HG-47.. H 2dryer right tower CO2 Purge outlet. . SHUT HG-27. .

CO2 Purge supply to water gas separator. . .. SHUT HG-29. . 112 dryer water gas separation outlet . . OPEN HG-30. H 2dryer equalizing valve. OPEN HG-25.. H 2dryer 4-way drying cycle outlet.. . .. . ... ... OPEN 5.3.12 Open dryer supply and return valves HG-9 and HG-10.

l 5.3.13 Verify dryer supply and return root isolation valves HG-48 and HG-49 are )

open. l 5.3.14 Close the main power disconnect switch at the base of the dryer and the main power breaker in the power panel and verify one of the tower on-line lights is lit.

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, HYDROGEN SYSTEM OPERATION January 25.1997 r

5.3.15 Perform the following valve line-up:

HG-60.. CO2header root isolation to main generator- SHUT HG-61. CO2manifold vent to atmos and 12 pack hose connection. SIRJT HG-5. CO2inlet to generator. SHUT HG-6.. Vent to atmosphere from bottom of generator. SHUT HG-7. Vent to atmosphere from top of generator.. SHUT HG-44. Vent / purge isolation from bottom of generator. OPEN HG-53. H 2reducing station to main generator inlet. OPEN HG-8. H 2supply to generator. .

OPEN 5.3.16 Clear the red tags and position the valves as follows:

HG-50. Hydrogen inlet to generator root isolation . OPEN HG-45. Vent / purge isolation from top of generator. . OPEN 6.0 HYDROGEN MAKE-UP TO THE MAIN GENERATOR WHILE THE HYDROGEN DRYER IS ISOLATED 6.1 Precautions and Limitations

{

6.1.1 An explosimeter should be used to sample the general area during the l

hydrogen charging evolution. l l

6.1.2 Observe no smoking, welding, open flames and sparks precautions in the j general area of the hydrogen gas system. I l

6.1.3 Hydrogen dryer valve HG-26 is throttled and should not be adjusted in this procedure.

6.2 Initial Conditions 6.2.1 The generator is on-line or pressurized with hydrogen.

6.2.2 The hydrogen dryer is isolated per Section 4.0 of this procedure.

6.2.3 Hydrogen make-up is required to the main generator.

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, HYDROGEN SYSTEM OPERATION January 25,1997

. 6.3 Procedure 6.3.1 Perform the following valve line-up:

HG-7.... . Vent to atmosphere from top of generator.. . .. SHUT HG-53. . H2 reducing station to main generator inlet.. . . .

OPEN  :

HG-8. ... . H2 supply to generator.. .. . . . . . . . ... ..

OPEN 6.3.2 Clear the red tags and position the valves as follows:

HG-50.. . Hydrogen inlet to generator root isolation. . . . . OPEN  :

HG-45. . Vent / purge isolation from top of generator . .. .. . OPEN 6.3.3 Increase main generator hydrogen pressure to 60 psig by feeding the generator on the hydrogen regulator bypass, HG-52. I 6.3.4 When the generator pressure reaches 60 psig, stop feeding on the hydrogen .

regulator bypass, HG-52.

6.3.5 Red tag shut the following valves: l l

HG-45.. . Vent / purge isolation from top of generator . . . . . . . . SHUT HG-50... Hydrogen inlet to generator roc: isolation....... ............ SHUT 6.3.6 Perform the following valve line-up:

HG-52. Low pressure regulator bypass... . . . . . .. SHUT HG-53. . H2 reducing station to main generator inlet .. .. ...

SHUT HG-8. H2 supply to generator... .... . . . . . . . . . .... SHUT HG-7. ...... Vent to atmosphere from top ofgenerator . . . ..... ....... OPEN 7.0 REPLACING HYDROGEN WITH CARBON DIOXIDE 7.1 Precautions and Limitations 7.1.1 An explosimeter should be used to sample the general area during the hydrogen replacement evolution.

7.1.2 An explosimeter must be used whenever the removable link in the hydrogen supply line is removed.

7.1.3 Observe no smoking, welding, open flames and sparks precautions in the general area of the hydrogen gas system. ..

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7.1.4 Do not allow generator pressure to exceed 3 psig during time carbon dioxide is being admitted.

7.1.5 Do not exceed 100 psig carbon dioxide pressure on manifold.

l 7.1.6 Observe the frost line on carbon dioxide supply header to see that it disappears i at least 10 feet from the point at which supply line enters the generator.

7.1.7 Anytime flow is secured through the dryer tower by shutting HG-9, HG-10, or  ;

any other dryer flow path isolation valve, power must be secured to the tower i blowers due to loss of cooling flow to them.

7,1.8 Hydrogen dryer valve HG-26 is throttled and should not be adjusted in this procedure.

7.2 Initial Conditions 7.2.1 Generator at standstill or on the turning gear.

7.2.2 Main lube oil and hydrogen seal oil systems in operation.

NOTE: Twelve bottles at 440 SCFper bottle. During a rapid discharge, the bottle l cools offso much that thefull contents will not discharge. l 7.2.3 Two systems volumes of carbon dioxide available.

l 7.2.4 Four single CO2 bottles will be maintained connected at the CO2 manifold.

The:e bottles will normally be maintained full and isolated and would only be used for purging the dryer should maintenance be required or to complete a generator purge in the event the 12 pack was not sufficient.

7.3 PROCEDURE 7.3.1 Align purity meter sampling to the top manifold by opening valves HG-2 and HG-4 and closing valves HG-1 and HG-3.

~~~

7.3.2 Shut or check shut the following valves:

HG-S t . . HP regulator outlet HG-53. LP regulator inlet HG-52. . . LP regulator bypass HG-8. .. . . Hydrogen manifold supply to generator HG-60. . Carbon dioxide manifold outlet HG-5. . . CO 2supply to main generator 7.3.3 Check open valve HG-45 generator top header isolations.

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, HYDROGEN SYSTEM OPERATION January 25.1997

%v 7.3.4 Check open valves HG-48, hydrogen dryer inlet root isolation, and HG-49, hydrogen dryer outlet root isolation.

7.3.5 Open HG-6A, loop seal isolation to allow excess water to drain from the generator vent line, then reshut HG-6A.

7.3.6 Vent the LP hydrogen regulator outlet header to atmosphere by checking HG-50 open, then open HG-51.

7.3.7 When depressurized, shut HG-50 and HG-51.

7.3.8 Remove the hydrogen supply line removable link.

7.3.9 Verify four single carbon dioxide bottles are connected at the four flexible hose connections with the bottle isolation valves shut.

7.3.10 Check shut HG-61 and connect the CO 2 12 pack to CO2 manifold vent valve HG-61 using the armorflex hose provided. Ensure a wall gasket is installed on the CO212 pack end of the flex hose prior to connecting the hose fitting.

7.3.11 Check shut the 12 pack master isolation and open the 12 individual bottle stops ,

on the 12 pack.

  • CAUTION

l PMT 7.3.12 Crack open the 12 pack master isolation valve to check for leaks at the 12 pack and CO2 manifold. Repair leaks as necessary.

7.3.13 Following satisfactory leak test, fully open the 12 pack master isolation.

HG-61 will be used to control CO2 flow to the generator.

7.3.14 Align the carbon dioxide supply header to the bottom of the generator, checking shut HG-6 and opening HG-5.

4 7.3.15 Commence release of generator hydrogen by opening HG-7, generator top manifold to vent header. Verify the generator "H2 Press Hi or Lo" alarm comes in when generator pressure decreases below 45 psig.

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NUCLEAR POWER BUSINESS UNIT 0132 OPERATING INSTRUCTIONS MINOR Revision 17 s HYDROGEN SYSTEM OPERATION January 25.1997 NOTE: Power is secured to noflowfor the tower blowers and also to ensure a tower shift does not take place during the various phases of the dryerpurge. The dryerpurge willbeperformedin three steps: Moisture Cooler, Reactivation Tower, and Absorption Tower.

7.3.16 When generator pressure is less than 3 psig, secure the hydrogen dryer by -

shutting valves HG-9 and HG-10 and opening the main power breaker:

Unit I at PP-5 BKR 13 Unit 2 at PP-8 BKR 11 7.3.17 Shut HG-44 and 45 upper and lower manifold isolation valves.

7.3.18 Perform the following valve line-up to purge the gas cooler.

HG-30. . . Hydrogen dryer equalizing valve.. . . . SHUT HG-27. H 2dryer water gas separation CO2 Purge inlet . . .

OPEN HG-29. H2dryer water gas separation outlet. . SHUT HG-25. . . H 2dryer 4-way drying cycle outlet . .. . .

OPEN HG-46..... H2dryer left tower CO2purge outlet.. . . . .... .. . OPEN HG-47..... H 2dryer right tower CO2 Purge outlet .. ... . . .... ,

OPEN HG-60.. .. CO 2header root isolation to main generator... ......OPEN aCAUTION* DO NOT EXCEED 10 PSIG IN THE CO2 MANIFOLD WHILE PURGING THE HYDROGEN DRYER.

7.3.19 Commence purging the gas cooler and piping by throttling open HG-61.

Check for a pressure increase on the tower outlet pressure gauges to verify a CO2flow Path through the dryer. Purge for 5 minutes.

7.3.20 Upon completion of the cooler purge, shut HG-61 and perform the following valve line-up:

HG-29... .. H 2dryer water gas separation outlet. . . . . . . . . . . .. .. . OPEN HG-25. ... H dryer 2 4-way drying cycle outlet.. .. . .

SHUT HG-46. . H2 dryer left tower CO 2purge outlet. . SHUT HG-47. H2dryer right tower CO2 Purge outlet. . . . .

OPEN HG-30. . . H dryer 2 equalizing valve. . . . . . . ..OPEN Page 13 of 25 REFERENCE USE

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aCAUTIONa DO NOT EXCEED 10 PSIG IN THE CO 2 MANIFOLD WHILE PURGING THE HYDROGEN DRYER.

7.3.21 Commence purge of the dryer towers by throttling open HG-61. Check for a  !

pressure increase on the dryer tower outlet pressure gauges to verify a CO2 flow path through the dryer. Purge for 5 minutes.

7.3.22 Upon completion of the 5-minute purge, open HG-46 and shut HG-47.

7.3.23 Continue purge of the towers while monitoring tower outlet pressure

, indication to verify CO2 flow. Purge for 5 minutes.

7.3.24 Upon completion of the second tower purge, shut HG-61 and perform the

following dryer valve line-ups
HG-27. . H 2dryer water gas separate CO2 Purge inlet.. . . . . . . . .

SHUT HG-25.... . H 2dryer 4-way drying cycle outlet....... .. ...... . . . . . . . . OPEN HG-46. ... H 2dryer lef1 tower CO2 Purge outlet .. . . . . .. . .... . ..... SHUT 7.3.25 Open generator purge and vent isolation valves HG-45 and HG-44.

7.3.26 Commence purging the generator of hydrogen by opening HG-61. Monitor the frost line on the black section of piping downstream of the CO2 manifold.

7.3.27 Should a frost line develop and build toward the main generator end of the ,

black section of piping, shut HG-61 and allow the piping to warm to ambient, then recommence the purge. .

7.3.28 When purity meter indicates 95% CO2, shut HG-61 and the 12 pack master isolation valve. Then shut HG-60 and HG-5.

7.3.29 Disconnect the armorflex hose from the 12 pack. Label the 12 pack as being empty and inform Ready Stores regarding need for a fresh 12 pack.

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, NUCLEAR POWER BUSINESS UNIT 0132 OPERATING INSTRUCTIONS MINOR Revision 17 s HYDROGEN SYSTEM OPERATION January 25.1997 7.3.30 Restore the hydroger, dryer to service by opening HG-9, HG-10, and then closing the main power breaker:

Unit 1 at PP-5 BKk 13 i Unit 2 at PP-8 BKR 11 8.0 REPLACING CARBON DIOXIDE WITH AIR 8.1 Precautions and Limitations 8.1.1 Do not allow generator manhole covers to be removed until generator pressure has decreased to atmospheric.

8.1.2 Avoid prolonged breathing of carbon dioxide during removal of manhole covers.

8.1.3 If ventilating the generator is required following the instrument air purge, it will be done by Maintenance per a Maintenance procedure.

8.2 Initial Conditions 8.2.1 Seal oil system may be secured providing shaft is not turning.

8.2.2 Purity meter indicates 95% carbon dioxide minimum.

8.2.3 Turbine building ventilation in operation.

8.3 Procedure 8.3.1 Connect instrument air through a regulator to the jumper connection at valve -

HG-8 to IA-749 (unit 1) or IA-1009 (unit 2), and adjust the regulator to 55 psig.

8.3.2 Check shut valves HG-7 and HG-5. Align purity blower sampling and return to the bottom of the generator by shutting HG-2 and HG-4 and opening HG-1 and HG-3.

8.3.3 Check open the generator to atmosphere valves, HG-6 and HG-44.

8.3.4 Open HG-8 and HG-45 to supply dry air to the top of the generator, forcing the CO2to the atmosphere through HG-6.

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NOTE: The hydrogen dryer will not receive a directpurge with instrument air due to its small volume of CO2.

8.3.5 After the CO 2has been purged from the generator, set regulator at 3 to 5 psig to maintain a small flow of dry air to prevent the entry of moist, outside air.

8.3.6 Open all water detector drain valves HG-15, HG-18, and HG-23.

9.0 REPLACING AIR WITH CARBON DIOXIDE 9.1 Precautions and Limitations 9.1.1 Do not allow generator pressure to exceed 3 psig during time carbon dioxide is being admitted.

9.1.2 Do not exceed 100 psig on carbon dioxide manifold.

9.1.3 Observe frost line on carbon dioxide supply header to see that it disappears at least 10 feet from the point at which supply line enters the generator.

9.1.4 Hydrogen dryer valve HG-26 is throttled and should not be adjusted in this l procedure. i 9.2 Initial Conditions 9.2.1 Main lube oil and hydrogen seal oil systems are in operation.

9.2.2 Purity meter system and blower in operation. ,

9.2.3 Hydrogen alarm panel energized.

9.2.4 Hydrogen supply isolated and " removable link" removed.

9.2.5 One full 12 pack of carbon dioxide available.

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9.3 Procedure i j 9.3.1 Perform valve lineup to replace air with carbon dioxide.

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HG-11... .. Hydrogen pressure / fan pressure low pressure side i transmitter root isolation . .. . . . . . . .. ... . . OPEN l HG-11 A. . Gas retum from gas condition monitor . .. . . ...OPEN  ;

HG-12.... . . Hydrogen pressure / fan pressure high pressure side  !

l transmitter root isolation . .. ... . . . .OPEN HG-12A . Gas supply to gas condition monitor. .. . . . . . .OPEN

HG-13. ... Turbine end liquid detector vent ... . . . . . . . .. .OPEN ,

j HG-14. . Turbine end liquid detector inlet .. . .. ... . . . . . . . . . . . . .OPEN HG-14A. . Turbine end liquid detector vent to atmosphere (Unit 1 only).. . .. .. . . . . . . . . . . . . . . . . . . ... SHUT HG-16. . .. . Generator end liquid detector vent... . .. ....OPEN i HG-17. . Generator end liquid detector inlet.. . . . . . . . . ..OPEN j HG-17A. Generator end liquid detector vent to atmosphere 4 (Unit 1 only).. ... . . . . . . . . . . . . . . .. SHUT j HG-19. . . Generator leads liquid detector vent... . . . ... ... ......OPEN HG-22.. ... . Generator leads liquid detector inlet.. . .................. . .. . .OPEN l HG-24.. .... Generator leads liquid detector root isolation.. ... . . .. .OPEN

! HG-26.. . ... Hydrogen dryer drying cycle flow throttle valve.... ...... . .. T HG-28.. . . . Hydrogen dryer isolation to water trap ... ... . .... . . ... . .. OPEN l HG-31. . . Hydrogen dryer purge outlet.. ... . ..... . ... .. ......... SHUT HG-32. . . Hydrogen dryer oil vapor filter drain.. . . .... ... S H U T

! HG-34. . . Hydrogen dryer supply line low point drain.. . ....... SHUT j

. HG-35. . Hydrogen pressure / fan press sensing line cross-connect. . SHUT i HG-36. . Hydrogen fan pressure high side sensing line drain.. ... SHUT

, HG-3 7.. . Hydrogen pressure / fan pressure low side drain . .. . ... .. . SHUT HG-38.. . . Hydrogen purity meter blower supply line drain.... .... ....... SIRJT

HG-39........ Hydrogen purity meter blower return line drain.... . ......... SHUT HG-41..... .. Purity meter low side isolation... .. .. .... ........ . .......... ..... OPEN HG-42.. .... Purity meter high side isolation. . . . . . . . . . . . . . . . . . . . . . . . . . . OPEN HG-43........ Purity meter blower supply line drain... ..... ..... ............... SHUT j HG-54.... ... Hydrogen header pressure switch isolation ........................ OPEN HG-94..... .. Hydrogen cooler HX-51 A diaphragm vent................ ........ SHLF
HG-90........ Hydrogen cooler HX-51 A diaphragm equalizing valve.. .... OPEN HG-96 .... .. Hydrogen cooler HX-51C diaphragm vent.. . . . . . ... SHUT HG-92........ Hydrogen cooler HX-51C diaphragm equalizing valve... . . OPEN i HG-95. . . Hydrogen cooler HX-51B diaphragr vent... . . .. . . . . .... SHUT HG-91. . ... Hydrogen cooler HX-51B diaphragm equalizing valve....... OPEN HG-97.. .... Hydrogen cooler HX-51D diaphragm vent .. . .. . SHUT i-HG 93. . ... Hydrogen cooler HX-51D diaphragm equalizing valve.. .OPEN

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' OPERATING INSTRUCTIONS MINOR Revision 17 9 HYDROGEN SYSTEM OPERATION January 25.1997

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9.3.2 Replace manhole covers and shut all water detector drain valves HG-15, HG-18 and HG-23.

9.3.3 Align purity meter sampling to the top manifold by opening HG-2 and HG-4 and shutting HG-1 and HG-3.

9.3.4 Align the generator top atmospheric vent header by opening HG-7 and shutting HG-6 and HG-8.

9.3.5 Align the carbon dioxide supply header by opening HG-5.

9.3.6 Verify four single carbon dioxide bottles are connected at the four flexible hose connections with the bottle isolation valve shut.

9.3.7 Connect the CO2 12 pack to CO2manifold vent valve HG-61 using the armorflex hose provided. Ensure a wall gasket is installed on the CO2 12 pack end of the flex hose prior to connecting the hose fitting. Check shut HG-60 and HG-61.

9.3.8 Check shut the 12 pack master isolation and open the 12 individual bottles stops on the 12 pack.

aCAUTIONa DO NOT EXCEED 100 PSIG ON THE CO 2 MANIFOLD.

l PMT 9.3.9 Crack open the 12 pack master isolation valve to check for leaks at the 12 '

pack and at the CO2 manifold. Repair leaks as necessary.

9.3.10 Following satisfactory leak test, fully open the 12 pack master isolation and HG-60. HG-61 will be used to control CO2 flow to the generator.

9.3.11 Check open valves HG-48, hydrogen dryer inlet root isolation, and HG-49 hydrogen dryer outlet root isolation.

1 NOTE: Power is secured due to noflowfor the tower blowers and also to ensure a tower shift does not takeplace during the variousphases of the dryerpurge.

The dryerpurge willbeperformedin three steps: Moisture Cooler, Reactivation Tower, and Absorption Tower.

9.3.12 Secure the hydrogen dryer by shutting valves HG-9 and HG-10 and open the main power breaker:

Unit I at PP-5 BKR 13 Unit 2 at PP-8 BKR 11 -

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. HYDROGEN SYSTEM OPERATION January 25.1997 7..

9.3.13 Shut HG-44 and 45, upper and lower manifold isolation valves.

9.3.14 Perform the following valve line-up to purge the gas cooler.

HG-30.. H 2dryer equalizing valve... .

SHUT HG-27. . H 2dryer water gas separation CO2 purge inlet.. . . .

OPEN HG-29.. . H2dryer water gas separation outlet. SHUT HG-25. H 2dryer 4-way drying cycle outlet . OPEN HG-46. H2dryerleft tower CO2 Purge outlet. .

OPEN HG-47. . H2 dryer right tower CO2 purge outlet.. OPEN HG-60.. . CO2header root isolation to main generator. OPEN aCAUTIONa DO NOT EXCEED 10 PSIG IN THE CO 2 MANIFOLD WHILE PURGING THE HYDROGEN DRYER.

9.3.15 Commence purging the gas cooler and piping by throttling open HG-61.

Check for a pressure increase on the tower outlet gauges to verify a CO 2 flow path through the dryer. Purge for 5 minutes.

9.3.16 Upon completion of the cooler purge, shut HG-61 and perform the following valve line-up:

HG-29. , . H2 dryer water gas separation outlet. .. .

OPEN HG-25. . . . H 2dryer 4-way drying cycle outlet .. SHUT ,

HG-46. . . H2dryer left tower CO2purge outlet. SHUT HG-47. . . . H 2dryer right tower CO 2purge outlet.. .

OPEN HG-30. .. H2dryer equalizing valve.. . . . . . . . . .

OPEN

  • CAUTION

9.3.17 Commence purge of the towers by throttling open HG-61. Check for a  !

pressure increase on the dryer tower outlet pressure gauges to verify a CO2 -

flow path through the dryer. Purge for 5 minutes.

9.3.18 Upon completion of the 5-minute purge, open HG-46 and shut HG-47.

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OPERATING INSTRUCTIONS MINOR

< Revision 17 i HYDROGEN SYSTEM OPERATION January 25.1997 ,

aCAUTION* DO NOT EXCEED 10 PSIG IN THE CO 2 MANIFOLD WHILE PURGING THE HYDROGEN DRYER.

9.3.19 Continue purge of the towers while monitoring outlet pressure indication to ,

verify CO2 flow Path. Purge for 5 minutes.

9.3.20 Upon completion of the second tower purge, shut HG-61 and perform the

following dryer valve line-ups

HG-27.. . H2 dryer water gas separation CO2 Purge outlet.. ., SHUT HG-25. . H2 dryer 4-way drying cycle outlet.. . .. .

OPEN ,

HG-46. - H2 dryer left tower CO2 Purge outlet. . . . .

SHUT 9.3.21 Open generator purge and vent isolation valves, HG-45 and HG-44.

d aCAUTIONa DO NOT EXCEED 100 PSIG IN THE CO2 MANIFOLD OR 3 PSIG IN THE MAIN GENERATOR.

9.3.22 Commence purging the generator of air by opening HG-61. Monitor the frost line on the black section of piping downstream of the CO2 manifold.

9.3.23 Should a frost line den op and build toward the main generator end of the  !

black section, shut HG-61 and allow the piping to warm to ambient, then I

recommence the purge.

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, 9.3.24 When the purity meter indicates 95% CO2 , shut HG-61 and the 12 pack master isolation. Then shut HG-60 and HG-5.

9.3.25 Disconnect the armorflex hose from the 12 pack. Label the 12 pack as being empty and inform Ready Stores regarding need for a fresh 12 pack.

9.3.26 Restore the hydrogen dryer to service by opening valves HG-9 and HG-10 and closing the main power breaker:

Unit I at PP-5 BKR 13 Unit 2 at PP-8 BKR 11 10.0 BJPLACING CARBON DIOXIDE WITH HYDROGEN 10.1 Precautions and Limitations 10.1.1 An explosimeter should be used to sample the general area d.uring the hydrogen charging evolution.

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, NUCLEAR POWER BUSINESS UNIT 0132 OPERATING INSTRUCTIONS' MINOR Revision 17 i HYDROGEN SYSTEM OPERATION January 25.1997 10.1.2 Observe no smoking, welding, open flames and sparks precautions in the general area of the hydrogen gas system.

10.1.3 Ensure fire extinguisher available near the manifold.

10.1.4 To prevent dangerous levels of hydrogen from accumulating within the exciter housing, the exciter housing doors should be maintained open whenever hydrogen is in the generator and the turbine is on the turning gear.

10.2 Initial ConditiQm 10.2.1 Generator filled with carbon dioxide of 95% purity.

10.2.2 Two and one-half system volumes of hydrogen available 3

(approximately 6000 fl ). Ref. Tank Level Book,48.

10.2.3 Main lube oil and hydrogen seal oil systems in operation.

10.2.4 Turbine building ventilation system in operation.

10.2.5 Hydrogen alarm panel, purity meter and blower in operation.

10.2.6 The four vents (HG-94,95, 96 and 97) are shut and the four equalizer valves (HG-90, 91,92 and 93) are open (located on top of the hydrogen coolers). l l

10.2.7 The hydrogen dryer will not receive a direct hydrogen purge due to the small volume ofCO2it contains.

10.2.8 The exciter housing doors are open. 1 10.3 Procedure 10.3.1 Replace hydrogen supply line " removable link."

10.3.2 Connect vent to bottom manifold by opening valve HG-6 and HG-44 and then l

shutting valve HG-7 and HG-45.

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1 10.3.3 Open HG-22A main lead water detector vent. '

10.3.4 Connect purity meter sampling lines to the bottom by opening HG-1 and HG-3 l and closing HG-2 and HG-4.

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, NUCLEAR POWER BUSINESS UNIT OI32 )

OPERATING INSTRUCTIONS MINOR '

Revision 17 i HYDROGEN SYSTEM OPERATION January 25.1997 1

10.3.5 Blowdown the purity meter sensing lines to remove any oil or water that may have collected:

HG-38. . Purity Blower Inlet Drain HG-39. . Purity Blower Outlet Drain

, 10.3.6 Open hydrogen supply to LP regulator (HG-81 and HG-53). Crack open LP regulator vent (HG-51) and adjust LP regulator for 3 psig to 5 psig. Shut HG-51.

10.3.7 Open HG-8, hydrogen manifold outlet valve, and HG-45, upper manifold isolation valve.

aCAUTIONa DO NOT EXCEED 5 PSIG IN THE GENERATOR.

10.3.8 Slowly open LP regulator outlet valve, HG-50. Adjust LP regulator as necessary to maintain 3 to 5 psig hydrogen supply pressure.

10.3.9 Continue to admit hydrogen until the purity meter indicates at least 95%

hydrogen purity.

10.3.10 When desired purity level has been reached, shut vent line valve HG-6. Shut vent valve HG-22A.

NOTE: Ifgenerator is to bepressurized to 60psig, an additionalfour (4) system.

volumes ofhydrogen willbe required (9700ft). Ref Tank LevelBook,48.

10.3.11 Set LP regulator pressure to the desired pressure. Periodically check and adjust as necessary LP regulator discharge pressure. Regulator discharge pressure may increase as generator pressure increases.  ;

10.3.12 The uncompensated density meter will read the following approximate values for 95% purity hydrogen:

Gas Pressure Uncompensated Density Meter 30 psig 37 45 psig 47 60 psig 59 I

t Page 22 of 25 REFERENCE USE e

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