ML20138K414

Rev 17 to OI 32, Hydrogen Sys Operation

ML20138K414
Person / Time
Site:	Point Beach
Issue date:	01/25/1997
From:	WISCONSIN ELECTRIC POWER CO.
To:
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References
OI-32, NUDOCS 9702180283
Download: ML20138K414 (25)

Text

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NUCLEAR POWER BUSINESS UNIT 0132 OPERATING INSTRUCTIONS MINOR

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Revision 17 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 CO, Section 4.0.

2 1.3 To replace hydrogen dryer air with CO, Section 5.0.

2 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 CO, Section 7.0.

2 1.6 To replace generator CO2 with air, Section 8.0.

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

2 1.8 To replace generator CO with hydrogen, Section 10.0.

2

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 regulator begins to drift in the upward direction.

j l

9702180293 970210 Page1of25 REFERENCE USE PDR ADOCK 05000301 P

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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.

Verify HG-57, normal PCV, set for 100-110 psig.

e.

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.

Verify HG-57, normal PCV, set for 100-110 psig.

e.

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.

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 12 pack supply to manifold....

SHUT 2

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 HG-6A... Vent line loop seal isolation.

SHUT HG-44..

. Vent / purge isolation from bottom of generator.

... SHUT j

HG-7...

. Vent to atmosphere from top of generator.

OPEN HG-5.

. CO supply to main generator..

OPEN 2

Page 3 of 25 REFERENCE USE

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 dryer water gas separation outlet..

SHUT 2

HG-25.

H dryer 4-way drying cycle outlet.

OPEN 2

HG-46.

. H dryer left tower CO2 Purge outlet..

OPEN 2

HG-47.

. H dryer right tower CO2 Purge outlet...

.OPEN 2

HG-60.... CO header root isolation to main generator...

..... OPEN l

2 aCAUTIONa DO NOT EXCEED 10 PSIG IN THE CO2 MANIFOLD WHILE PURGING THE HYDROGEN DRYER.

i 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, CO 12 pack supply. Check for a pressure increase on the dryer tower outlet 2

pressure gauge to verify CO flow Path through the cooler and piping. Purge 2

for 5 minutes.

4.3.8 Upon completion of the cooler purge, isolate the CO supply and perform the 2

following valve line-up:

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

OPEN 2

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

SHUT 2

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

SHUT 2

2 HG-47..

.. H dryer right tower CO2 Purge outlet..

OPEN 2

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

OPEN 2

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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 MANIFOLD WHILE 2

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 flow. Purge for 5 minutes.

2 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 CO flow. Purge for 5 minutes.

2 4.3.12 Upon completion of the second tower purge, shut the CO supply.

2 4.3.13 If maintenance is to be performed on the dryer, align the valves as follows and red tag:

i HG-9....... H dryer oil vapor filter inlet isolation.

..... S H U T 2

HG-10... Outlet isolation from hydrogen dryer.................. SHUT HG H dryer water gas separator purge inlet isolation....... SHUT 2

HG-46.

H dyer left tower CO purge outlet.

SHUT 2

2 HG-47.

H dryer right tower CO purge outlet..

. SHUT 2

2 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, H make-up to the generator is isolated. If the 2

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.

CO 12 pack supply to manifold.,

SHUT 2

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 to main generator.....

......... OPEN 2

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NUCLEAR POWER BUSINESS UNIT 0132 OPERATING INSTRUCTIONS AUNOR Revision 17 HYDROGEN SYSTEM OPERATION January 25.1997

,(

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 CO purge inlet.

OPEN 2

HG-29.

. H dryer water gas separation outlet.

SHUT 2

HG-25..

H dryer 4-way drying cycle outlet.

. OPEN 2

HG-46. -

H dryerleR tower CO purge outlet.

OPEN 2

2 HG-47

. H2 dryer right tower CO purge outlet..........

. OPEN 2

HG-60..

CO header root isolation to main generator.

. OPEN 2

1 aCAUTION*

DO NOT EXCEED 10 PSIG IN THE CO MANIFOLD WHILE 2

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, CO 12 pack supply. Check for a pressure increase on the dryer tower outlet 2

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 CO supply and perform the 2

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 len tower CO2 Purge outlet.

SHUT 2

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

OPEN 2

HG-30... H2 dryer equalizing valve...

OPEN Page 7 of 25 REFERENCE USE

NUCLEAR POWER BUSINESS UNIT OI32 OPERATING INSTRUCTIONS MINOR Revision 17 HYDROGEN SYSTEM OPERATION January 25.1997

• CAUTIONa DO NOT EXCEED 10 PSIG IN THE CO2 MANIFOLD WHILE PURGING THE HYDROGEN DRYER.

5.3.7 Commence purge of the dryer tower by throttling the CO2 supply. Check i

tower pressure gauge to verify CO flow. Purge for 5 minutes.

2 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 3IANIFOLD WHILE 2

PURGING THE HYDROGEN DRYER.

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

2 5.3.10 Upon completion of the second tower purge, shut the CO supply.

2 NOTE:

Purging the CO out of the dryer with hydrogen prior to placing the dryer in 2

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 left tower CO2 Purge outlet.....

..... SHUT 2

HG-47..

H dryer right tower CO2 Purge outlet..

SHUT 2

HG-27.

CO2 Purge supply to water gas separator.

SHUT HG-29..

11 dryer water gas separation outlet..

OPEN 2

HG-30.

H dryer equalizing valve.

OPEN 2

HG-25..

H dryer 4-way drying cycle outlet..

....... OPEN 2

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.

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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NUCLEAR POWER BUSINESS UNIT 0132 OPERATING INSTRUCTIONS MINOR Revision 17 HYDROGEN SYSTEM OPERATION January 25.1997 r

5.3.15 Perform the following valve line-up:

HG-60..

CO header root isolation to main generator-SHUT 2

HG-61.

CO manifold vent to atmos and 12 pack hose connection. SIRJT 2

HG-5.

CO inlet to generator.

SHUT 2

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 reducing station to main generator inlet.

OPEN 2

HG-8.

H supply to generator.

OPEN 2

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 hydrogen charging evolution.

6.1.2 Observe no smoking, welding, open flames and sparks precautions in the j

general area of the hydrogen gas system.

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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i NUCLEAR POWER BUSINESS UNIT 0132 OPERATING INSTRUCTIONS MINOR Revision 17 l

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:

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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NUCLEAR POWER BUSINESS UNIT OI32 i

OPERATING INSTRUCTIONS MINOR Revision 17 HYDROGEN SYSTEM OPERATION January 25.1997 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.

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 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 cools offso much that thefull contents will not discharge.

7.2.3 Two systems volumes of carbon dioxide available.

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

2 2

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 supply to main generator 2

7.3.3 Check open valve HG-45 generator top header isolations.

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NUCLEAR POWER BUSINESS UNIT 0132

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OPERATING INSTRUCTIONS MINOR Revision 17 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 12 pack to CO manifold vent valve 2

2 HG-61 using the armorflex hose provided. Ensure a wall gasket is installed on the CO 12 pack end of the flex hose prior to connecting the hose fitting.

2 7.3.11 Check shut the 12 pack master isolation and open the 12 individual bottle stops on the 12 pack.

• CAUTION

• DO NOT EXCEED 100 PSIG ON THE CO MANIFOLD.

2 l

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

2 7.3.13 Following satisfactory leak test, fully open the 12 pack master isolation.

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

2 7.3.14 Align the carbon dioxide supply header to the bottom of the generator, checking shut HG-6 and opening HG-5.

7.3.15 Commence release of generator hydrogen by opening HG-7, generator top 4

manifold to vent header. Verify the generator "H Press Hi or Lo" alarm 2

comes in when generator pressure decreases below 45 psig.

Page 12 of 25 REFERENCE USE

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NUCLEAR POWER BUSINESS UNIT 0132

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OPERATING INSTRUCTIONS MINOR Revision 17 HYDROGEN SYSTEM OPERATION January 25.1997 s

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 dryer water gas separation CO2 Purge inlet.

OPEN 2

HG-29.

H dryer water gas separation outlet..

SHUT 2

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

OPEN 2

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

........ OPEN 2

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

OPEN 2

HG-60.... CO header root isolation to main generator...

......OPEN 2

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 CO flow Path through the dryer. Purge for 5 minutes.

2 7.3.20 Upon completion of the cooler purge, shut HG-61 and perform the following valve line-up:

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

............ OPEN 2

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

SHUT 2

HG-46.. H2 dryer left tower CO purge outlet..

SHUT 2

HG-47.

H dryer right tower CO2 Purge outlet..

OPEN 2

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

..OPEN 2

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HYDROGEN SYSTEM OPERATION January 25.1997 i

aCAUTIONa DO NOT EXCEED 10 PSIG IN THE CO MANIFOLD WHILE 2

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.

• CAUTIONa DO NOT EXCEED 10 PSIG IN THE CO MANIFOLD WHILE 2

l PURGING THE HYDROGEN DRYER.

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

2 7.3.24 Upon completion of the second tower purge, shut HG-61 and perform the following dryer valve line-ups:

HG-27..

H dryer water gas separate CO2 Purge inlet...

SHUT 2

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

........ OPEN 2

HG-46....

H dryer lef1 tower CO2 Purge outlet................... SHUT 2

7.3.25 Open generator purge and vent isolation valves HG-45 and HG-44.

• CAUTIONa DO NOT EXCEED 100 PSIG IN THE CO MANIFOLD OR 3 2

PSIG IN THE MAIN GENERATOR.

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 CO manifold.

2 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% CO, shut HG-61 and the 12 pack master 2

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 CO to the atmosphere through HG-6.

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NUCLEAR POWER BUSINESS UNIT OI32 OPERATING INSTRUCTIONS MINOR Revision 17 9

HYDROGEN SYSTEM OPERATION January 25.1997 NOTE:

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

After the CO has been purged from the generator, set regulator at 3 to 5 psig 8.3.5 2

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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2-

^

4 9.3 Procedure i

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

4 i

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 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 Page 17 of 25 REFERENCE USE y

NUCLEAR POWER BUSINESS UNIT 0132

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

'~'

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 CO 12 pack to CO manifold vent valve HG-61 using the 2

2 armorflex hose provided. Ensure a wall gasket is installed on the CO 12 pack 2

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 MANIFOLD.

2 l

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

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

2 9.3.10 Following satisfactory leak test, fully open the 12 pack master isolation and HG-60. HG-61 will be used to control CO flow to the generator.

2 9.3.11 Check open valves HG-48, hydrogen dryer inlet root isolation, and HG-49 hydrogen dryer outlet root isolation.

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 Page 18 of 25 REFERENCE USE

NUCLEAR POWER BUSINESS UNIT OI32 OPERATING INSTRUCTIONS MINOR Revision 17 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 dryer equalizing valve...

SHUT 2

HG-27.

. H dryer water gas separation CO purge inlet..

OPEN 2

2 HG-29..

. H dryer water gas separation outlet.

SHUT 2

HG-25.

H dryer 4-way drying cycle outlet.

OPEN 2

HG-46.

H dryerleft tower CO2 Purge outlet.

OPEN 2

HG-47.

. H2 dryer right tower CO purge outlet..

OPEN 2

HG-60..

. CO header root isolation to main generator.

OPEN 2

aCAUTIONa DO NOT EXCEED 10 PSIG IN THE CO MANIFOLD WHILE 2

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 flow 2

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 dryer 4-way drying cycle outlet..

SHUT 2

HG-46..

. H dryer left tower CO purge outlet.

SHUT 2

2 HG-47.... H dryer right tower CO purge outlet..

OPEN 2

2 HG-30.

.. H dryer equalizing valve..

OPEN 2

• CAUTION

• DO NOT EXCEED 10 PSIG IN THE CO MANIFOLD WHILE 2

PURGING THE HYDROGEN DRYER.

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.

Page 19 of 25 REFERENCE USE

NUCLEAR POWER BUSINESS UNIT OI32 OPERATING INSTRUCTIONS MINOR J

Revision 17 HYDROGEN SYSTEM OPERATION January 25.1997 i

aCAUTION*

DO NOT EXCEED 10 PSIG IN THE CO MANIFOLD WHILE 2

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 CO MANIFOLD OR 3 2

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 CO manifold.

2 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.

9.3.24 When the purity meter indicates 95% CO, shut HG-61 and the 12 pack master 2

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.

Page 20 of 25 REFERENCE USE 4

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

2 10.2.8 The exciter housing doors are open.

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 shutting valve HG-7 and HG-45.

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.

l j

Page 21 of 25 REFERENCE USE

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1 NUCLEAR POWER BUSINESS UNIT OI32 OPERATING INSTRUCTIONS MINOR Revision 17 i

HYDROGEN SYSTEM OPERATION January 25.1997 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

NUCLEAR POWER BUSINESS UNIT OI32 OPERATING INSTRUCTIONS MINOR Revision 17

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