ML20138K575

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Rev 21 to Pc 9,Part 1, Monthly Shifting of Instrument Air Compressors & Air Dryer Checks
ML20138K575
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
PC-9, NUDOCS 9702190044
Download: ML20138K575 (13)
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j 'a ' NUCLEAR POWER BUSINESS UNIT PC 9 PART 1 e OPERATIONS PERIODIC CHECKS NNSR

', Revision 21 MONTHLY SHIFTING OF INSTRUMENT AIR January 25,1997 COMPRESSORS AND AIR DRYER CHECKS Date RECORD DSS PROCEDURE VERIFIED CURRENT AND CHECKED FOR TEMPORARY CHANOES !F FIELD l COPIE5 REQUIRED. USE PDF 00NdAW NP 12 4 AND DO SQI COMPLETE TM5 BLOCK OPS Specialist BY: DATE:

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I 1.0 PURPOSE I

1.1 Periodic check of the operation of each compressor in the auto and constant modes of operation.

1.2 Provide monthly periodic maintenance consistent with good operating practices and recommendations of compressor technical manual. '

l.3 Verify proper operation of the air dryer systems.

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2.0 REFERENCES

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

3.0 PRECAUTIONS AND LIMITATIONS l 3.1 This procedure is designed to test all modes of operation of each compressor. The operator must have a thorough understanding of the compressor modes of operation and read through the procedure steps prior to performing the compressor switching section.

3.2 It is not necessary to wait until the running compressor unloads to manually start the idle I compressor. There is a time delay that prevents the compressor from loading for seven l seconds. Should the compressor breaker trip when starting, evaluate to determine if the time delay relay is functioning properly.

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3.3 It is good practice to secure a compressor when it is unloaded because of the reduced load on breaker contacts.

l 3.4 During portions of this procedure when checking the AUTO mode control of the 1 compressor, the CONSTANT run compressor is kept running in an unloaded condition by isolating its nuloader sensing mercoid pressure switch. This is done to provide a more reliable brekup should the AUTO mode compressor fail to function properly. Should a problem with header pressure arise, IA-36 for K2A or IA-44 for K2B must be reopened immediately to allow the CONSTANT mode compressor to load and unload properly.

3.5 It is good practice to ensure compressor temperatures stabilize at normal ~ values after each compressor start and cycling of control switch from one operating mode to another.

l 9702190044 9762'10 ' ' Page1of13 REFERENCE USE ADOCK 05000301 PDR ,

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,. 'e NUCLEAR POWER BUSINESS UNIT PC 9 PART 1 4 OPERATIONS PERIODIC CHECKS NNSR G, Revision 21 MONTHLY SHIFTING OF INSTRUMENT AIR January 25,1997 COMPRESSORS AND AIR DRYER CHECKS r

3.6 The maximum drying temp for Z-39 and Z-31 drying towers is 300 F. If the drying temp  :

on any tower is found >300 F, then the associated air dryer Z-39 or Z-31 should be l removed from service and evaluated for possible damage to the desiccant.

INITIALS 4.0 INITIAL CONDITIONS  ;

4.1 Both instrument air compressors are available for service with Unit 1 and Unit 2 IA headers cross-connected I A-11 OPEN. -

4.2 Instrument air receivers are cross-connected IA-5 and IA-31 are OPEN.

4.3 Proper oil level in standby air compressor.  ;

4.4 Instmment air dryers on line and bypasses reset.

4.5 Control Room operator has reviewed precautions and limitations 3.2,3.3 and 3.4 prior to continuing.

4.6 Tools and Materials Recommended Air intake filter, stock number 914-7420 (February, March, August, September only)

Stopwatch for timing compressors 1 Flashlight  !

1/2" wrench 9/16" wrench Small pipe wrench 4

5.0 PROCEDURE 5.1 Record maximum AP for on-line air dryers and filters.  !

Z-39 PI-3072C Afterfilter AP psid i PI-3072B Air dryer AP psid PI-3072A Prefilter AP psid Z-31 PI-3086A Prefilter AP psid PI-3096 Air dryer AP psid PI-3086B Afterfilter AP psid 4

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a NUCLEAR POWER BUSINESS UNIT PC 9 PART 1 OPERATIONS PERIODIC CHECKS NNSR
, Resision 21 MONTHLY SHIFTING OFINSTRUMENT AIR January 25,1997 COMPRESSORS AND AIR DRYER CHECKS INITIALS i

5.2 Check dryer control panel indications.

Z-39 POWER ON and I.A. DRYER BYPASS VALVE POWER AVAILABLE lights on.

Z-31 POWER ON and I.A. DRYER BYPASS VALVE POWER AVAILABLE lights on. HIGH INLET TEMP and SWITCH FAILURE lights off.

NOTE: Check cycle chart on the inside door ofZ-39 controlpanel C29for sequence ofdryer actions. Approximately 9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> is requiredfor entire cycle. This chart applies to both Z-39 andZ-31.

aCAUTION* IF MAXIMUM TOWER TEMP IS FOUND TO BE

>300 F, THEN REFERENCE PRECAUTIONS AND LIMITATIONS STEP 3.6.

5.3 To verify heater operability and proper air dryer operation. Record the following data.

5.3.1 Z-39 Tower "A" Check indicating lights for proper sequence step mimic indication (SAT /UNSAT)

Purge air pressure PI-3051 psig Air flow through exhaust muffler (SAT /UNSAT)

Maximum tower temp reached during regeneration TI-3047A

  • F Ifmax temp is not 2235"F and s265 F, submit a WO. (YES/NO)

WO Tag Number '

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  • 9

NUCLEAR POWER BUSINESS UNIT

~

.. PC 9 PART 1 OPERATIONS PERIODIC CHECKS NNSR

Revision 21 MONTHLY SHIFTING OF INSTRUMENT AIR January 25,1997

, ,, . COMPRESSORS AND AIR DRYER CHECKS INITIALS 5.3.2 Z-39 Tower "B" Check indicating lights for proper sequence step mimic indication (SAT /UNSAT) ,

Purge air pressure on PI-3051 psig Air flow through exhaust muffler (SAT /UNSAT)

Maximum tower temp reached during regeneration TI-3047B F If max temp is not 2235 F and s265'F, submit a WO. (YES/NO)

WO Tag Number 5.3.3 Z-31 Tower "A" Check indicating lights for proper sequence step mimic indication (SAT /UNSAT)

, Purge air pressure on PI-6305 psig Air flow through exhaust mufiler (SAT /UNSAT)

Maximum tower temp reached during regeneration TI-3099A 'F If max temp is not 2235 F and s265*F, submit a WO. (YES/NO)

WO Tag Number

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,.. NUCLEAR POWER BUSINESS UNIT PC 9 PART 1 OPERATIONS PERIODIC CHECKS NNSR

,, Revision 21 MONTHLY SHIFTING OF INSTRUMENT AIR January 25,1997 g g. . COMPRESSORS AND AIR DRYER CHECKS INITIALS 5.3.4 Z-31 Tower "B" 4

Check indicating lights for proper sequence step mimic indication (SAT /UNSAT)

Purge air pressure on PI-6305 psig Air flow through exhaust mufiler (SAT /UNSAT)

Maximum tower temp reached during regeneration TI-3099B *F i If max temp is not it235 F and s265 F, submit a WO. (YES/NO)

WO Tag Number 5.4 In January and July only, check dewpoint alarm setpoints.

5.4.1 For 2-39, press the "X" inside the dewpoint box. If not at

-30'C, submit a WO to I&C.  ;

MT-3000 C 1

WO Submitted (YES/NO) l WO Tag Number 5.4.2 For Z-31, press red button (center left side). If not at -4'F l submit a WO to I&C.

MT-3068 C WO Submitted (YES/NO)

WO Tag Number 5.5 Check control air regulators located below control panels at 60-80 psi.

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, ,.', NUCLEAR POWER BUSINESS UNIT PC 9 PART 1 OPERATIONS PERIODIC CHECKS NNSR

, Revision 21 MONTHLY SHIFTING OF INSTRUMENT AIR January 25,1997

' / 7.; COMPRESSORS AND AIR DRYER CHECKS INITIALS l PMT 5.6 Verify outlet DRY WHEN GREEN indicators are green.

5.7 In January only, line up air dryer " pre" and "after" filters for both Z-39 and Z-31 as follows:

Even numbered years "A" filters online Odd numbered years "B" filters online Submit a Work Order to Maintenance to change out the four filtersjust taken offline if the delta pressure readings in step 5.1 exceed 2.0 psid.

WO Tag Numbers 5.8 Perform a full flow flush of the service water side of the nonrunning (AUTO) instrument air compressor.

  • CAUTIONa IF THE AUTO COMPRESSOR HAS BEEN RECENTLY SECURED AND IS STILL HOT, THEN THROTTLE OPEN THE ASSOCIATED l BYPASS VALVES IN STEP 5.8.1 TO OBTAIN A SMALL DEFLECTION OF THE FLAPPER IN l THE FLOW SIGHTGLASS FOR 5 MINUTES l BEFORE PROCEEDING ON WITH THE FLUSH.

5.8.1 Flush the compressor heat exchangers by simultaneously fully opening both service water supply bypass valves for 5 min:

K2A -

SW 73 (YS 2919 Bypass)

SW 77 (SW 2830 TCV Bypass) or K2B -

SW 88 (YS 2920 Bypass)

SW 92 (SW 2824 TCV Bypass) 5.8.2 Shut SW 73/88 5.8.3 Throttle (M turn open) SW 77/92 Page 6 of13 REFERENCE USE

' '- NUCLEAR POWER BUSINESS UNIT PC 9 PART 1 j OPERATIONS PERIODIC CHECKS: NNSR -

. , Revision 21  :

MONTHLY SHIFTING OF INSTRUMENT AIR January 25,1997 I COMPRESSORS AND AIR DRYER CHECKS i t-  :

INITIALS '

4 .

i NOTE: Compressors should be s: cured when unloaded 4

NOTE: There is a seven-second time delay in compressor loading.

aCAUTIONa WHEN SHIFTING COMPRESSOR OPERATING  ;

MODES PAUSE FIVE SECONDS.

j 5.9 If necessary, shift IA compressors to ensure that compressor K2A is in

CONSTANT and compressor K2B is in AUTO.

5.10 Record the following data for K2A. Normalload/ unload pressures are 95 psig/105 psig on PI-3005. ,

Total Time loaded see Total Time unloaded see -

Load pressure psig Unload pressure psig ,

Maximum air flow obtained prior to unload l 2

FI-3081 cfm FI-3082 cfm

! 5.11 Check piston rod packing for leaks. This is accomplished by listening for  ;

blow by at the piston rod gland. If any audible leakage is detected, submit

, an WO to Maintenance.  !

WO Submitted (YES/NO)  !

i  :

WO Tag Number f

5.12 Place the control switch for K2B in pull out and perform the following on  :

l K2B compressor:  !

5.12.1 Using IA-216, drain control line strainer F-125B l

5.12.2 Inspect oil scraper rings for leakage. Oil accumulation in the i area between the crankcase and cylinder head indicates scraper rings are leaking. If any leakage is detected, submit a WO to i Maintenance. <

WO Submitted (YES/NO)

I WO Tag Number -

5.12.3 . Inspect the air intake filter. Vibrate or blow off heavy dirt l

accumulation. In February and August replace with new filter, l l.. stock number 914-7420. ..

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  • . NUCLEAR POWER BUSINESS UNIT PC 9 PART 1

." OPERATIONS PERIODIC CHECKS NNSR

, Revision 21 >

MONTHLY SHIFTING OFINSTRUMENT AIR January 25,1997

/44 COMPRESSORS AND AIR DRYER CHECKS .

INITIALS 5.13 Place compressor K2B in AUTO j 5.14 Perform the following steps as soon as K2A starts its normal load cycle:

5.14.1 Verify IA-45 and IA-46 open. Remove swagelock plug on PI-6320 vent line. Crack open IA-47 to establish a small air bleed.

, NOTE: K2B will runfor 7 seconds prior to loading.

5.14.2 Throttle IA-45 in the closed direction slowly to decrease pressure to PS-3076 and PI-6320, recording the pressure at which the AUTO compressor K2B starts. Setpoint 90 psig 4.

Psig

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5.14.3 Reopen IA-45 and shut vent'IA-47. Reinstall swagelock plug.

, 5.14.4 Ensure proper lube oil pressure and cooling water to the compressor K2B.

  • CAUTIONa SHOULD PROBLEMS ARISE WITH HEADER PRESSURE OR SHOULD THE CONSTANT MODE COMPRESSOR LOAD WHILE IA-36 IS ISOLATED, REOPEN IA-36 IMMEDIATELY TO RESTORE LOAD / UNLOAD FUNCTION.

) 5.14.5 As soon as K2A unloads, shut IA-36 to PS-3003C to prevent

K2A from loading. This will allow data to be taken on the auto run mode compressor K2B.

4 5.14.6 Record K2B compressor AUTO load and unload pressures.

Normal load / unload pressures are 95/105 psig on PI-6320.

Load pressure psig Unload pressure psig 5.14.7 Reopen IA-36.'

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NUCLEAR POWER BUSINESS UNIT PC 9 PAR 1 i OPERATIONS PERIODIC CHECKS NNSR

',. Revision 21 MONTHLY SHIFTING OF INSTRUMENT AIR January 25,1997 COMPRESSORS AND AIR DRYER CHECKS j

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INITIALS j 1

NOTE: Compressors should be secured when unloaded.

NOTE: There is a seven-second time delay in compressor loading.

  • CAUTION
  • WHEN SIIIFTING COMPRESSOR OPERATING )

MODES PAUSE FIVE SECONDS.

5.15 Place the control switch for K2B from AUTO to CONSTANT.

5.16 When K2A unloads, place the control switch for K2A to AUTO.

l 5.17 Record the following data on K2B, normal load / unload pressures are 95/105 psig on PI-6320:

Total Time loaded see Total Time unloaded see Load pressure psig Unload pressure psig

. Maximum air flow obtained prior to unload FI-3081 cfm FI-3082 cfm l

5.18 Check piston rod packing for leaks. This is accomplished by listening for blowby at the piston rod gland. If any audible leakage is detected, submit a WO to Maintenance.

WO Submitted (YES/NO)

WO Tag Number 5.19 Place the control switch for K2A in pull out and perform the following on i K2A compressor: 2 1

5.19.1 Using IA-207, drain control line strainer F-125A 5.19.2 Inspect oil scraper rings for leakage. Oil accumulation in the area between the crankcase and cylinder head indicates scraper rings are leaking. If any leakage is detected, submit a WO to Maintenance.

WO Submitted (YES/NO)

WO Tag Number l

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l Page 9 of 13 REFERENCE USE 1

NUCLEAR POWER BUSINESS UNIT PC 9 PART 1 OPERATIONS PERIODIC CHECKS NNSR

, Revision 21 MONTHLY SHIFTING OF INSTRUMENT AIR January 25,1997 COMPRESSORS AND AIR DRYER CHECKS j INITIALS ;

5.19.3 Inspect the air intake filter. Vibrate or blow off heavy dirt accumulation. In March and September replace with new filter, l 4

stock number 914-7420.

5.20 Place compressor K2A in AUTO 5.21 Perform the following steps as soon as K2B starts its normal load cycle:

5.21.1 Verify IA-37 and IA-38 open. Remove swagelock plug on PI-3005 vent line. Crack open IA-39 to establish a small air bleed.

NOTE: K2A will runfor 7 seconds prior to loading.

5.21.2 Throttle IA-37 in the closed direction slowly to decrease pressure to PS-3004 and PI-3005, recording the pressure at <

which the AUTO compressor K2A starts. Setpoint 90 psig 1.

psi 8 5.21.3 Reopen IA-37 and shut vent IA-39. Reinstall Swagelok plug. l 5.21.4 Ensure proper lube oil pressure and cooling water to the  ;

compressor K2A.

aCAUTIONa SHOULD PROBLEMS ARISE WITH HEADER PRESSURE OR SHOULD THE CONSTANT MODE COMPRESSOR LOAD WHILE IA-44 IS ISOLATED, REOPEN IA-44 IMMEDIATELY TO RESTORE LOAD / UNLOAD FUNCTION.

5.21.5 As soon as K2B unloads, shut IA-44 to PS-3075 to prevent K2B from loading. This will allow data to be taken on the auto run made compressor K2A.

5.21.6 Record K2A compressor AUTO load and unload pressures.  !

Normal load / unload pressures are 95/105 psig on PI-3005.

Load pressure psig Unload pressure psig

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. .. NUCLEAR POWER BUSINESS UNIT PC 9 PART 1 OPERATIONS PERIODIC CHECKS NNSR

, Revision 21 MONTHLY SHIFTING OF INSTRUMENT AIR January 25,1997 l

,, COMPRESSORS AND AIR DRYER CHECKS l INITIALS j 5.21.7 Reopen IA-44.

NOTE: Compressors should be secured when unloaded NOTE: There is a seven-second time delay in compressor loading.

aCAUTIONa WHEN SHIFTING COMPRESSOR OPERATING MODES PAUSE FIVE SECONDS.

5.22 Shift compressor lineup as necessary to provide for more even run time on the compressors.

Odd Month Even Month K2A Constant K2A Auto K2B Auto K2B Constant 5.23 Blowdown the following:

NOTE: Following may be done with the compressor running or idle.

5.23.1 T-179A using IA-300 YS-6326A using IA-302, isolate and clean if plugged.

5.23.2 T-179B using IA-305 YS-6326B using IA-348, isolate and clean if plugged.

5.24 Coordinate with control and check "Instmment Air Header Pressure LO" alarm on C01 as follows:

5.24.1 Remove swagelock plug on vent line for PT-3083 and crack open IA-290 to establish a small air bleed.

NOTE: F1-3083A andPI-3083B are on Col.

5.24.2 Slowly throttle closed on IA-289. Air header pressure LO alarm should come in at approximately 89 psig.

Log pressure PI-3083A or B psig ..

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" PC 9 PART 1

' NUCLEAR POWER BUSINESS UNIT  ;

OPERATIONS PERIODIC CHECKS NNSR 2- Revision 21 MONTHLY SHIFTING OF INSTRUMENT AIR January 25,1997 ,

COMPRESSORS AND AIR DRYER CHECKS

  • ..a JNITIALS 5.24.3 Open IA-289, close IA-290 and reinstall swagelock plug.

5.24.4 Remove swagelock plug on vent line for PT-3084 and crack open IA-287 to establish a small air bleed.

NOTE: PI-30:14A and PI-3084B are on Col.

5.24.5 Slowly throttle closed on IA-286. Air header pressure LO alarm should come in approximately 89 psig.

Log pressure PI-3084 A or B psig 5.24.6 Open IA-286, close IA-287 and reinstall swagelock plug.

5.25 If the compressor load / unload setpoints are not within 2-3 psig of desired values or LO pressure alarm setpoints are not within 2 psig of desire value, notify the duty shift superintendent, and submit a maintenance work order.

WO Submitted (YES/NO) l WO Tag Number

5.26 Record maximum airflow for the following flow instruments

l FI-3081 South Instrument Air Header scfm FI-3082 North Instrument Air Header scfm IFI-3085 U1 Turbine Building scfm 2FI-3085 U2 Turbine Building scfm IFI-30F'1 U1 Containment scfm 2FI-3037 U2 Containment scfm 5.27 Ifindividual compressor loaded time in Steps 5.10 and 5.17 both exceed 100 seconds, (review the maintenance work request file for outstanding instrument air leaks and check airflows in Step 5.26 to previous months ~

data for increased leakage). If no increased air leakage is apparent, survey the remainder of the instrument air header for a new source ofleakage.

Inform the duty shift superintendent of the results of the survey and note in the remarks section.

l (SAT /UNSAT) l Page 12 of13 REFERENCE USE

.* NUCLEAR POWER BUSINESS UNIT PC 9 PART 1 OPERATIONS PERIODIC CHECKS NNSR

, Revision 21 MONTHLY SHIFTINO OF INSTRUMENT AIR January 25,1997

/ . e. COMPRESSORS AND AIR DRYER CHECKS INITIALS NOTE: Possible evaluation ofexcessive run time may be attributed to nonrunning compressor back-leakage. Control Room supervisor may need to develop additional assessment.

5.28 If the loaded time for K2A exceeds 100 seconds, submit a maintenance work order.

WO Submitted (YES/NO)

WO Tag Number 5.29 If the loaded time for K-2B exceeds 115 seconds, submit a maintenance work order.

WO Submitted (YES/NO)

WO Tag Number _

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