ML061940333

Gland Water Cross-tie Pump Failures Fault Trees

ML061940333
Person / Time
Site:	Cooper
Issue date:	07/07/2006
From:	Nebraska Public Power District (NPPD)
To:	Office of Nuclear Reactor Regulation
References
FOIA/PA-2006-0007
Download: ML061940333 (26)

Text

Pump: SW-P-D Procedure: 6.2sW.101. Normal 'I Test Date Diff Press (dP) Vib (IV) Vib (2H) Vib (4H): Test Comments

_(pjid _ (qf_

(isnsec)_ (inleec) ._in/sec) 81712002 59.78 0.069 0.098 0.092 5:06:00 PM 9/512002 59.56 Performed to satisfy 1:42:00 AM administrative summer frequenCy test 10/2/2002 ' 59,9 Administrative summer 11:03:00 PM Increased frequency test 10/16/2002 59.56 0.099 0.102 0.064 PMT for Lift Adjustment 12:20:00 PM per Work Order #4256276; all new reference values represent acceptable pump operation 11/27/2002' 60.03 0.119 0.131 0.082 PMT for packing 12:00:00 PM adjustment per WO

1. 4274153: reference, Values reconfirmed.

1/612003 65.36 0.058 0.088 0.079 PMT for pump overhaul 3:00:00 AM (4256493). pump lift (4260039) and discharge check valve,.

13CV, replacement (4256498). Pump rewbaselined. See log

_en_.ty.

2/612003 66.3 0.075 0.102 0.072 DIP value recorded in 12:00:00 PM reference to "E" Bay water level. A value of 66.4 psid was obtained for "D" bay water level.

SW-TCV-451B is inoperable and was' maintained in the open position.

3/1412003 65.85 0.086 0.119 0.075 6:30:00 AM 4/8/2003 64.66 0.0653 0.096 0.0673 9:42:00 AM 5/14/2003 62.4 0.089 0.122 0.088 4:41:00 PM 7/10/2003 63.08 0.11 0.1 0.0739 2:50:00 AM I III _

10/312003 61.992 0.104 0.101 U.0594 DIP inalert range; 5:00:00 AM Notlfication #10275317 written to place pump on increased frequency Page 4

-I Pump: SW-P-D Procedure: 6.2SW.1 01, Normal Test Date. Diff Press (dP) Vib (1V) Vib (2H) Vib (4H) Test Comments (p10d) (inlsec) (ifilsec) (In/sec) 11/10/2003 65.09 0.065 0.119 0.073 Pretest for work order 12:00:00 PM #4333508 1111412003 63.88 0.108 0.11 0.068 This test was a 12:53:00 AM post-maintenance test forworkorder

1. 4333508 (lift adjustment and re-pack). The gap was adjusted from 0.077" to 0.094" per the SAP confirmation for this work order, The pump is operating acceptably and was re-basellned.

Additionally, the punmp was removed from increased frequency on 11-25-03, RAL revision 167 contains the new acceptance criteria for this pump.

1/5/2004 62.68 0.115 0.105 0.049 4:30:00 PM I 04 .9. o.1230.1o ) 1 5:00:00 PM Page 5

P Diff Press (dP) (psid) U Forecasting Component ID: SW-P-D 11/27/02 03102/03 06/06/03 09/09/03 12/14/03 03/18/04

i

\Jfib (1V) (infsec)

• Vib (2H) (inlsec) M' Vib (4H) (in/sec) It Forecasting [j Forecasting Component ID: SW-P-D 11/27/02 03/02/03 06/06103 09109103 12/14/03 03/18104

/0

______Pump:, SW-P-B Procedure: 6.2SW.101, Normal Test Date Diff Press (dP) Vib (IV) Vib(2H) Vib (4H) Test Comments

____.__,psid}. (in/sec) (inlsec)_ (inlsec).

10/1712002 62.5 0.0756 0.0697 0.0497 Post Lift Adjustment per 11:07:00 PM Work Order 4256277; all new reference values represent acceptable pump operation 1U24/2003 62.6 0.061 0.091 0.099 "B" test only performed.

12:00:00 PM Test terminated due to problems with SW-FI-364B (notification

1. 10222100):.>

SW-TCV-45113 would not indicate full closed and therefore was not timed(notification.

1. 10222116); notification 10222134 was also written during this test due to finding.

SW-FI-385B isolated.

2/6/2003 62.5 0.075 0.088 0.069 DIPvalue recorded in 12:00:00 PM reference to "E" Bay water level. A Value of 62.6 psid was obtained for "D" bay water level.

SW-TCV-451B is inoperable and was maintained in the open position.

2/2212003 66.85 0.132: 0.173 0,125 Re-baselined due toa 12:00:00 PM pump overhaul per work order #4256491. The new values"represent acceptable pump

_ _operation.

3114/2003 66.8 0.104, 0.124 0.102 8:30:00 AM 4/8/2003 66.9 0.104 0.114 0.085 9:42:00 AM I 5/14/2003 65.4 0.099 0.117- 0.067 4:41:00 PM 7/10/2003 64.58 0.0635 0.0846 0.0939 12:00:00 PM 10/3/2003 63.99 0.0639 0.0967 0.109 5:00:00 AM I Page 4

Pump: SW-P-B Procedure: 6.2SW.10, Normal Test Date Diff Press (dP)* Vib (IV) Vib (2H) Vib (4H). Test Comments

,psld) i (inLsec) (iWsec[ (inec) . .

11/1012003 65.09 0.103% 0.155 0.108 PMT following packing 12:00:00 PM replacement per work order #4333507; work should not have changed pump values; river temperatures have more affect:

reconfirmed r-eference I _values 1/5/2004 64.67 0.079 0.116 0.1 4:30:00 PM 311812004 63.9 0.082 0.122 0.1 5:00:00 PM 6/10/2004 63.2 Pre-test for 4382673, 12:30:00 AM pump lift adjustment.

DIP is in the alert range low. This potential was previously identified and is why the lift adjustinent was scheduled. Reference notification #10321308.

i 6110/2004 62.97 0.073 0.099 0.131 This was a post-work 6:10:00 PM test for work orders 4375384 (pump .

re-pack) and 4382673 (pump impeller lift adjustment). The pump is operating acceptably and is being re-baselined. Refer to IST log for further information.

Page: 5

I, W Diff Press (dP) (psid) 0 Forecasting Component .ID: SW-P-B 10117/02 02/15/03 06/15/03 10/14/03 02111104 06/10/04

Vib (1V) (in/sec)

• Vib (2H) (in/sec)

• Vib (4H) (in/sec) U Forecasting E] Forecasting Component ID: SW-P-B 0.17.,

0.16 0.151 0.14 0.12-

• 0.11 .---...----

00 0.10 00 0.08

' \/

b.7 o~or1 0.05*

10/17102 02115/03 06/15/03 10/14/03 02111104 06/10/04

S Order Type Bsc start Short. text FunctLoc. Basic fin.

63 G 11!1!!

1111ili 4ý1I c!: 005O UNPLANNED LCO C-S B ' ý 00 M /05/20 i*rP-ELLRR LIFT PER 7w2-.4 -0T2-SWPB 29 4256491 CM 02/21/2003 OVERHAUL -"B SERVICE WATER PUMP CNS-2-SW-P-B 02/22/2003 4300025 CM 03/13/2003 LOW GLAND WATER FLOW SW PUMP B. CNS 2-SW-P-B 03/14/2003 w

- 99 4-00-460-4-7.G 02,1142G-40.4 wrsc 99 098 "Bl" OIutvICI W.-T"' eaII ENS 2 SW PSB0i~t00 4296807 CM 03/25/2003 RETOROUE FOUNDATION BOLTING ON SW-P-B CNS-2-SW-P-B 03/25/2003 4300276 CM 04/17/2003 FLUSH SW-P-B GLAND SEAL LINE CNS-2oSW-P-B 04/17/2003 * ~~g~

Ia HOtL 4309765 CM 05/19'/2003 SW-P-B HAS EXCESSIVE GLAND LEAKAGE CNS-2-SW-P-B 05/19/2003 4321864 CM 09/26/2003 "BK SERVICE WATER PUMP GLAND LEAKAGE CNS-2ý-SW-P-B 09/16/2003

-SW -ess--

e- e -'B~- 9 - 9 PN -- 094 2 8 t 6 I 4333507 CM 11/10/2003 SWAP-B PACKING HAS NO ADJUSTMENT LEFT CNS-2-SW-P-B 11/10/2003 4-4.-0

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44444- Nr; P a nRapcm iff2S P fi~

9 '26 4361757 CM 02105/2004 SW PUMP B NEEDS PACKING' ADJUSTED CNS-2-SW-P-B 02/11/2004 it0-,t) 4366506 CM 03/01/2004 EXCESSIVE PACKING LEAKAGE FROM SW PUMP B CNS-2-SW-P-B 03/02/2004 4375384 CM 06/10/2004 SW-P-B :IS OUT OF PACKING ADJUSTMENT CNS-2-SW*P-B 06/11/2004 P 4382673 PM 06/10/2004 SET IMPELLERý LIFT PER 7.1.45 CNS-2-SW-P-B 06/11/2004 5L, - P -,ý

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/,r *f I- A dj " ~e 17-L/ 02 0 9P/7- 4, J'11At I YD USE: REFERENCE 18 CNS OPERATIONS MANUAL E FECTIV E MAINTENANCE PROCEDURE 7.2.45 APPROVAL: SORC OWNER: J. A. NICHOLS SW PUMP LIFT ADJUSTMENT DEPARTMENT: MNT

1. PU RPO SE . ...... .............. ........ .................................

2. PRECAUTIONS AND LIMITATIONS ............................. ......... 1

3. REQUIREMENTS ...................................................... 2

4. INSTRUCTIONS ................ ... .:.................. ........... ........ 2

5. RESTORATION ........................................................ 4

6. ACCEPTANCE CRITERIA ............ .............................. 4 ATTACHMENT 1 SIGN-OFF AND REVIEW SHEET...................... 5 ATTACHMENT 2 INFORMATION SHEET .............................. 7 REVISION VERIFICATION:.

(initial use + every 7days) "3.2. -,

REV. IDATE CHANGES 8 5/10/01 Incorporated EBS terminology.

9 see above Deleted Step 2.2. Added Step 3.5, revised Steps 4.5, 4.7, and 6.1

1. PURPOSE Iq .1 This procedufe provides Maintenance personnel with instructions for adjusting impeller lift of a service water pump (CICs: SW-P-A, SW-P-B, SW-P-C. and SW-P-D).

[1 1.2 This procedure also provides for recording AS FOUND and AS LEFT impeller lift settings for reference. Qualifications Verif ied

2. PRECAUTIONS'AND LIMITATIONS

[-<2.1 ThePump motor shall not be run When disconnected from pump without being absolutely certain sufficient clearance exists to prevent contact with the pump lift adjusting ring.

[-"2.2 Ensure any steps marked N/A are recorded as discrepancies. Steps within the procedure that clearly ifdicate they-are N/A if-specified conditions are met are exempt from this requirement.

[I.2.3 At least one performer shall have the ability, skill, training, or experience required for the general scope of woik in which they are involved.

2'1.4 Certified measuring and mechanical gauging/test equipment shall be calibrated and data recorded on Attachment 1.

PROCEDURE 7.2.45 1 REVISION 9 PAGE 1 OF 7

1 2.5 QC inspections shall be performed by personnel QC certified for the specific QC function.

1/2.6 Discrepancies shall berecorded on a Discrepancy Sheet.

3. R QUIREMENTS 1 3.1 Ensure following equipment and materials are available, as needed:

[] 3.1.1 Common hand tools.

3.1.2 Feeler gauge.

[ ] 3.1.3 Calibrated 0" to I" micrometer.

[4"" 3.1.4 Calibrated torque wrench capable of torquing to 80 ft-lbs.

[ ] 3.1;5 Nickel Never-Seeze, thread lubricant.(Q-94-484).

1. 3.2 -Ifperforming initial pump lift adjustment, have Operations run pump for at least I hourjust prior to setting lift to wash the pump clear of sand.

[< 3.3 Record Approved Work Order/Maintenance Plan Number: 42 5"'-//

[4 3A Record CIC: 54c- --

[ [*/3.5 SW System Engineer to determine approximate AS LEFT pump lift setting.

Approximate Impeller Lift Setting: "69'o

4. "INSTRUCTIONS

[ :4.1 Except for two diagonally opposite bolts, loosen and remove all bolts from

coupling.

[ 4.2 Evenly loosen the two remaining bolts, allowing pump shaft to lower, and then

remove bolts.

. A4.3 Using strap or pipe wrench on pump shaft, shake and attempt to rotate pump shaft to ensure impeller is resting on the bottom.

I PROCEDURE 7.2.45 I REVISION 9 I I

PAGE 2 OF 7 1 I RCDR RVSO.. 5I PAEOF

[ NOTE - If AS FOUND measurement in Step 4.4.is within the limits stated in Step 4.7, adjustment is not required.

[< 4.4 (QC Witness) Using a feeler gauge, measure and record AS FOUND impeller lift by measuring gap between adjusting plate face and drive half coupling face and record reading.

AS FOUND Impeller Lift: 0. ./Q L inch Performed By:z QC Signature/Date: 2Z LJ4,!V J 0-3 4/ 4.5 Adjust pump lift to the approximate impeller lift setting from Step 3.5 by holding pump half coupling against turning and rotating adjusting plate.

4.6 Turn adjusting plate down until bolt holes will line up with nearest bolt holes in pump half coupling.

r4.7

[ ]ACI (QC Witness) Using a feeler gauge, measure and record AS LEFT pump lift. The AS LEFT pumrplift shall be close to the approximate impeller lift scatting from Step 3.5 and between 0.040" and 0.080".

AS LEFT Impeller Lift: 0. C 73 inch Performed By:5*i!..

QC Signature/Date: ~L l~.(2 .2 ~-e'

['<4.8 Rotate driver shaft to align bolt holes of drive half coupling with adjusting plate.

[ -4.9 (QC Hold) Inspect pump components as follows, recording any discrepancies found:

[ 6 4.9.1 Pump coupling for damage, erosion, corrosion, and wear.

I1SAT; [1 UNSAT

[ 4.9.2 Coupling bolts for damage, wear, galled, or stripped hýeds.

I SAT; I ] UNSAT QC Signature/Date: 'L,

[ ¢4.10 If any discrepancies are recorded, they shall be resolved.

I PROCEDURE 7.2.45 1 REVISION 9 1 PAGE 3 OF 7 j

f 4 1 Apply thread lubricant to coupling bolts.

[;7'4.12 Replace two coupling bolts and tighten progressively until secure; thereby closing gap above adjusting plate and raising impellers to the running position.

[-i"4.1 3 (QC Witness) Install remaining coupling bolts and torque all bolts to 80 ft-lbs.

Performed By:

QC Signature/Date: A i- ' 2!A z-217 I <"4.14 Manually rotate shafttobe certain shaft is free to turn.

5. RESTORATION I f75. I Sign in Clearance Order and release pump to Operations for testing.

.6. ACCEPTANCE CRITERIA I['"'.I AS LEFT pump lift is between 0.040" to 0.080".

PROCEDURE 7.2.45 1 REVISION 9 1 PAGE 4 OF 7

i ATTACHMENT I SIGN-OFF AND REVIEW SHEET STEP IDENTIFICATION CALIBRATION NUMBER NUMBER DESCRIPTION DUE DATE

.Z.,(. 'TSt ..... 0/.,, , /, ,*,c  ! Z - '

4 Initials Printed Name Initials Printed Name

/

I I. /

I Acceptance Criteria Satisfied: [4'.YES;, I NO Discrepancies Recorded: I ] YES; [ NO If YES, all discrepancies are resolved.

Mechanical Mainitenance Supervision, Review: . _DDate:9,/*,-..,,

System Engineer.Review: Date:

RECORDS Entire procedure is included with a Work Order for CNS Records (quality'record upon TECO).

I PROCEDURE 7.2.45 1 REVISION 9 1 PAGE 5 OF7 I

i

• ATTACHMENT 1 SIGN-OFF AND REVIEW SHEET Initial/date by each discrepancy or resolution listed.

1. " DISCREPANCIES # RESOLUTIONS 0 rv Ny

) - J-ý 2- 7( -Q~

PROCEDURE 7.2.45 REVISION 9 PAGE 6 OF 7

A ATTACHMENT 2 INFORMATION SHEET

1. DISCUSSION 1.1 Service water pumps are electric driven, single-stage, vertical turbine pumps.

1.2 Service water pumps provide cooling water for the Turbine Equipment Cooling System (TEC), Reactor Equipment Cooling System (REC). Residual Heat.

Removal System (RHR); and Diesel Generator'Cooling Systems (DGJW and DGLO) heat exchangers. The system also provides suction for the screen wash and sparger pumps.

1.3 The four pumps are located in the Intake Structure Service Water Pump Room. The pumps are numbered IA, 1C, 1B, and ID starting from the north.

2. REFERENCES 2.1 VENDOR MANUALS 2.1.1 CNS Number 0180,'Service Water Pumps.

I PROCEDURE 7.2.45 1 REVISION 9 1 PAGE 7 OF 7 ]

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-906/09/2004 Order #:4382673 jRLTANNE Original Page 1 NPPD WORK ORDER OPERATIONS & MATERIAL LIST Order 4382673 Order:type PM CNS Planned Maintenance Description SET IMPELLER LIFT PER 7.2.45 Start date 06/10/2004 End .date 06/11/2oo4 Priority 3 important Status REL ESTC MACM PRC SETC ISS TSTR FunctLocation CNS-2-SW-P-B ABC Ind. E SORT SW-P-B Description SWP B Programs:

IST SSEL Location 903 Room SWP RM Plant Section IS MainiPlanGroup CNS CNS Planning Dept MainWrkCenter MNTSHOPM CNS MaintPlan 800000008753 MaintItem 12703 Required in Mode: Repair in Mode:

1 RUN Tech -Spec Ref.:

References:

PMO8297

.RCR 2001-0129 #2 SET IMPELLER.LIFT PER 7.2.45 P W~r SET IMPELLER LIFT FOR SW-P'S Division II.

PER SYSTEM ENGINEER (D.VORPHAL) GLAND FLUSHING NOT REQUIRED AT THIS TIME. DUETO ONE TIME PERFORMANCE OF THIS WORK, STEPS 50, .80, & 90 WERE DELETED FROM THIS WORK ORDER. JRWHISL 6/2/04 WORK SIF'D INTO0WEEK 424 AT T-0 ADDED TO PREVENT PUMP'LIFT FROM ENTERING ALERT RANGE DURING NEXT IST TEST, SCHEDULED 6/10/04 BRSTRAN 06/.08/2004

-CLEARANCE ORDER SW 4382673 SW-P-B LIFT ADJ.

PKG PRE-ISSUED PENDING CO. SW 4382673 SW-P-B LIFT ADJ. SCSMALL 6-9-04.

Operation 0010 :APPLICABLE SECTIONS OF 6.2SW.101 Status DSEX REL Work center OPSCREW CNS ON SHIFTWOPERATIONS CompConfNo. 952221 Qualifications Verified

-7,3

" .1 - If AS FOUND measurement in Step 4.4 is within the limits stated in

• >~Stedp 4.7, adjustment is not required.

6194.4(QC Witness) Using a feeler gauge, measure and record AS FOUND impeller lift by measuring gap between adjusting plate face and drive half coupling face and and, record reading.

record' readin. AS FOUND Impeller Lift: 0.,0'6-L inch Performed By:

QC Sighature/Date:

-4,5 Adjust pump lift to as close as possible to 0.100" gap (without exceeding this value) by holding pump half coupling against turning and rotating adjusting plate.

WK4.6 Turn adjusting plate down until bolt holes Will line up with nearest bolt holes in pump half coupling.

9* 4.7 3AC3 (QC Witness) Using a feeler gauge, measure and record AS LEFT pump lift. The AS LEFT pump lift shall be as close to 0.100" as possible (without exceeding this value).

AS LEFT Impeller Lift: 0. * " inch erf ed By:

ýQO Signature/Diate:. /

Rotate driver shaft to align bolt holes of drive half coupling with adju"Pin plate. "

(QC Hold) Inspect pump components as follows, recording an*l discrepanc~'. -.

.*found:

S'4.9.1 Pump couplingfor damage, :erosion, corrosion, and wear.

V ]TUNSAT 49.2 Coupling bolts for damage, wear; galled, or.stripped threads.

A T ] UNSAT QC Signature/Date:- -.

10 If any discrepancies are recorded, they shall be resolved. .

4.11 S Apply thread lubricant to coupling bolts.

I , PROCEDURE SI 7.2.45 I -

.I REVISION 10 PAGE PI 3 OF 7

S Order Type B-c start Short text FUnctLoc. Basic fin, 4289093 CM 01/10/2003 ADD PACKING TO SW-P-D. CNS-2-SW-P-D 01/07/2003 .rE--).

1004560

-- LCO 12/28/2002 SW-PED OVERHAUL LCO 3.7.2 CNS-2 SWP-D 01/29/2003 lOvtkjl 4260039 PM 01/OS/2003 SET IMPELLER LIFT PER 7.2.45 SEE NOTE. CNS-2-SW-P-D 01/29/2003 .t4 1. - 43vC

1. *.-[7 4288200 CM 02/0512003 NEED TO RETORQUE FOUNDATION BOLTS PER 7. CNS-2-SW-P'-D 02'/05/2003 4300977 CM 04/06/2003 INSPECT DIVISION .II SW GLAND HATER .PIPE CNSý-2-SW-P-D 04/08/2003 "W$se¢o- il 'r r'r 4300283 CM 04'/17/2003 FLUSH SW-P-D "GLAND SEAL LINE CNS-2-SW-P-D 04/17/2003 4[u1i0%

• 4 B.O foc" 4303499 CM ,0519/2003 ADJUST PACKING ON SW PUMP D CNS-2ý-SW-P-D 05/19/2003 p at,").

4315750 CM 06/17/2003 SWP1D EXCESSIVE SEAL' LEAKAGE CNS-2-SW- P-D 016/19/2003

-t2-S-5-i-~ - oseB ae CL0Dss OUT, ?ifl 9; 2ta iG; om4t 2u

,W I'~ U 80-j4.3-0c3, 4321865 CM 09/16/2003 "D' SERVICE WATER. PUMP GLAND LEAKAGE CNS-2-SW-P-D 09/16/2003 P.UdI 4333508 CM 11/10/2003 PACKING LEAK AND'NO ADJUSTMENT LEFT CNS-2-SW-P-D I/14/203 L-4378723 CM 05/10/2004 SW-P-D NEEDS PACKING ADJUSTED CNS-2-SW-P-D 05,/11/2004 4361903 CM 06/21/2004 SW .PUMP D NEEDS PACKING ADJUSTED CNS-2-Sw-P-D 06/21/2004

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GDROWLE PERFORMED LIFT PER 7.2.45. AS FOUND LIFT WAS .077" AND AS LEFT LIFT WAS .094".

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• KDSULLW & MDBODEN RESET LIFT AS FOUND WAS 0.079 AND AS LEFT WAS

.0.079 TORQUED COULPING BOLTS TO 80 FT POUNDS RETURNED TO SERVICE.