ML20148G804

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Rev 0 to MP 725.2, Overhaul of Jockey Fire Protection Pump
ML20148G804
Person / Time
Site: Millstone Dominion icon.png
Issue date: 05/30/1997
From: Carolyn Cooper
NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20148F977 List:
References
MP-725.2, NUDOCS 9706060159
Download: ML20148G804 (25)
v • d • e


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MAINTENANCE PROCEDURE Overhaul of Jockey Fire Protection Pump MP 725.2 Rev. 0 - ,

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1 Approval: '

1 PORC Mtg. No: /-97 -Ofr3 Date: 5- 2b9'7 Effective Date: ' 6' JS -O l Level of Use SME: C. Cooper General 9706060159 970530 PDR ADOCK 05000245 p PDR l

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Millstone Unit I  !

l Maintenance Procedure l L (~~ Overhaul of Jockey Fire Protection Pump  :

l  ;

l L TABLE OF CONTENTS l l -i 9

1 l 1. PURPOSE....................................................2  !

! 2. P RE R EQ UISITES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

3. P R E CAUTI O N S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. I N STR U CTI O N S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  ;

i 4.1 Motor and Pump Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 i, 4.2 Pump Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  ;

4.3 Pump Cleaning and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.4 Pump Re pair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.5 Pu m p Asse mbly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.6 Motor and Pump Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 g

4.7 Operational Checkout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 1

' 5. REVI EW AN D SIG N- O FF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 i

6. R E FE R EN CES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 1

i 7. S UM M ARY OF CH ANG ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 A'ITACHMENTS AND FORMS Attachment 1, " Pump Cross-Section View ('Ippical)" . . . . . . . . . . . . . . . 20 Attachment 2, " Inspection Data Record" . . . . . . . . . . . . . . . . . . . . . . . . . . 22 L  !

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l r 1. PURPOSE i

1.1 Objective i l

t The objective of this procedure is to provide instructions for overhauling  !

the electric motor-driven jockey fire protection pump.

l 1.2 Discussion This procedure provides guidance for overhauling the electric l motor-driven jockey fire protection pump. This pump is a model i TMUAH, five-stage, centrifugal, vertical, diffuser-type pump  !

manufactured by the Peerless Pump Co.

Sections 4.1 through 4.7 cover pump removal, disassembly, cleaning and j inspection, repair, assembly, and operational checkout.  ;

1.3 Applicability i This procedure applies to local ID M7-11, " Jockey Fire-Pump and _ ,

Motor Assembly." i

2. PREREOUISITES ,

T (V 2.1 Documents l

2.1.1 WC 10 (Att)," Lifted Lead and Jumper Device Data Sheet" 2.2- Measuring and Test Equipment (M&TE) 2.2.1 All M&TE has been calibrated in accordance with WC 8,

" Control and Calibration of Measuring and Test Equipment" and the calibration is current.

i 2.2.2 OA torque wrenches (click or dial type) with a minimum accuracy and maximum torque wrench full-scale value listed in the table below for the specified torque application range.

Specified Torque Maximum Torque Wrench Minimum Application Range Full-Scale Value Accuracy l 84 to 96 in-lbs Between 150 and 200 in-lbs 5% ,

57 to 63 ftalbs Between 100 and 150 ftelbs - 5%

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-~ 2.2.3 Dial indicator with a 1-inch travel and minimum accuracy of

( )3 0.0005 inch such as QA-1502 2.2.4 Inside micrometer with a range of 2 to 3 inches and an accuracy of 0.0005 inch such as MPS-49 2.2.5 Outside micrometer with a range of 0 to 1 inch and an accuracy of 0.0005 inch such as QA-1680 2.2.6 Outside micrometer with a range of 2 to 3 inches and an accuracy of i 0.0005 inch such as QA-1679 2.3 Tools and Consumables 2.3.1 Tools a

Mechanic's standard tool kit Hack saw blade

- Small file Snap gage Soft-faced hammer

- Wire brush 5

/ 32 or /8 1

nch i needle punch l

2.3.2 Equipment j Chain fall, minimum 1/2-ton capacity Grinding equipment (if wear rings are replaced)

Liquid nitrogen or dry ice (if wear rings are replaced)

Slings, minimum1 /2-ton capacity l

+ V-blocks or lathe l \J' Level of Use STOP THINK ACT REVIEW Rev.O General ,

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1 2.3.3 Spare Parts IO Housing 0-ring (6)  !

Gasket (11), six required a i

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  • Drive lock pin (25), five required i

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Base plug 0-ring (27) )

Seal (31)

Brass spacer (32) j i

Scaling washer (38), four required i p 2.3.4 . Consumables

  • Approved cleaning solvent such as Polywater Hydrafoam 2020 All-Purpose Cleaner Approved gasket hibricant such as Mobilux EP.-2

)

  • Approved 0-ring lubricant such as Dow Corning M55 l
  • Approved /32-inch 1

thick gasket material such as Garlock

, Blue-Gard (if cutting gaskets (11) from gasket material)

  • Fine-grit abrasive Scotch-Brite pads 2.4 Definitions 2.4.1 TIR-Total Indicated Runout 2.5 Responsibilities ]

2.5.1 Operations Department is responsible for filling, venting, and running pump during operational checkout.

,. 3. PRECAUTIONS l

l 3.1 Match mark disassembled components as necessary to aid in reassembly.

Do not match mark delicate parts or critical mating surfaces.

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3.2 Ensure all consumables to be used in or on power plant components are

s) controlled in accordance with CC .1," Control of Chemical Consumable

s' Products," and that a Restricted Use Permit has been issued as necessary.

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4. INSTRUCTIONS )
O 4.1 Motor and Pump Removal 4.1.1 Refer'Ib Attachment 1, and LOOSEN clamp screws securing i coupling (3).

4.1.2 REMOVE motor (1) as follows:

l a. REMOVE conduit cover.

b. MARK motor leadwires.
c. DISCONNECT motor leadwires and grounds.

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d. RECORD lifted leads onto WC 10 (Att)," Lifted Lead and Jumper Device Data Sheet."

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e. TAPE motor leadwires.
f. RlG motor.
g. REMOVE capscrews (18) securing motor to frame adapter (2).

C AUTIO N Motor must be removed from pump by lifting straight up.

h. REMOVE motor (1) and motor adapter (2A).

4.1.3 REMOVE coupling (3).

4.1.4 REMOVE insulation and heat trace from the following:

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. Suction piping

- Discharge piping l .

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4.1.5 DISCONNECT the following:

Suction piping Discharge piping 4.1.6 ' INSTALL temporary covers over suction and discharge pipe opemngs.

4.1.7 RIG pump.

l l 4.1.8 LOOSEN bolts securing base clamps to pump.

j 4.1.9 REMOVE base clamp nuts and base clamp from foundation.

4.1.10 REMOVE bolts securing pump to foundation.

4.1.11. REMOVE and TRANSPORT pump to a controlled work area or ESTABLISH a controlled work area.

4.2 Pump Disassembly 4.2.1 REMOVE capscrews (30) securing seal housing (29).

O 4.2.2 REMOVE the following from pump shaft.

a. Seal housing (29) 1'
b. Seal (31)
c. Seal spacer (32) 4.2.3 REMOVE housing 0-ring (6) from seal housing.

4.2.4 REMOVE nuts (23) and sealing washers (38) from base studs (24).

4.2.5 Using a soft-faced hammer, TAP frame adapter (2) and diffuser (8) to loosen gasket seal.

4.2.6 REMOVE the following from diffuser stack:

a. Frame adapter (2) i i
b. Gasket (11) l l l i

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q c. Diffuser (8)  ;

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d. Gasket (11) l 4.2.7 Using a soft-faced hammer, TAP base (13) to loosen gasket seal from bottom diffuser.

l 4.2.8 With base studs installed, REMOVE base (13) from diffuser i l stack.

4.2.9 REMOVE base plug (28), and base plug 0-ring (27) from base.

4.2.10 REMOVE bottom diffuser gasket (11). ,

4.2.11 DISASSEMBLE pump stage as follows:

t CAUTION .

Shaft and impeller hub must not support any weight of diffuser stack. i m a. Using a wood block under hub ofimpeller and a thin piece of !

t wood under diffuser stack, LEVEL diffuser stack.

b. ENSURE wood block is under impeller hub. t
c. Using a5/32 or 1/s-inch needle punch, DRIVE drive lock pin (25) out of impeller hub and shaft.  ;

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d. REMOVE impeller (10). )
e. IE necessary, using soft-faced hammer, TAP diffuser to break gasket seal. j
f. REMOVE diffuser (8) and gasket (11).

4.2.12 Refer To step 4.2.11, and DISASSEMBLE remaining pump stages.

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! 4.3 ' Pump Cleaning and Inspection I I

CAUTION l

All consumables to be used in or on power plant components must be

controlled in accordance with CC 1, ' Control of Chemical Consumable Products," and a Restricted Use Permit must be issued when necessary.

4.3.1 Using an approved cleaning solvent, CLEAN all components.

4.3.2 Using a fine-grit abrasive or Scotch-Brite pads, REMOVE the following from all mating surfaces:

= Dirt a Paint

  • Loose scale

= Corrosion

- Burrs l

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= Raised surfaces NOTE l

Structural damage and defects include breakage, cracks, deformation, distortion, corrosion, pitting, scoring, scratches, erosion, abrasion, galling, and indications of misalignment.

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4.3.3 Visually INSPECT all components for wear, structural defects, and damage.

4.3.4 IE inspection results are not satisfactory, REPAIR or REPLACE applicable component (s).

4.3.5 MEASURE the following clearances for each stage.

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Impeller hub-to-wear ring Impeller skirt-to-wear ring v

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i 4.3.6 RECORD the following onto Attachment 2: )

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Impeller hub-to-wear-ring clearance for each stage

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' Impeller skirt-to-wear-ring clearance for each stage j M&TE serial numbers l

a Calibration due dates i

4.3.7 E impeller-to-wear ring clearance is greater than 0.020 inch, Refer To Section 4.4, and REPLACE applicable wear ring.

4.3.8 Using V-blocks or lathe, INSPECT pump shaft TIR at the following locations:

Base bearing 4.3.9 RECORD the following onto Attachment 2:

Pump shaft TIR values M&TE serial No.

Calibration duc date i 4.3.10 E pump shaft runout is greater than 0.002 inch, REPAIR or REPLACE pump shaft.

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4 4.4 Pump Repair 4.4.1 IE wear ring inspection results are not satisfactory, DR ,

impeller-to-wear ring clearance exceeds 0.020 inch REPLACE  !

wear ring as follows: i

a. Using a hacksaw blade or grinder, CUT or PRESS wear ring ,

from diffuser. l

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b. Using a small file or fine-grit abrasive, REMOVE any burrs j from wear ring seating surface.

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c. Using an approved cleaning solvent, CLEAN wear ring seating surface.

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d. CHILL wear rmg.

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e. Refer To Figure 1, and PRESS new impeller hub wear ring in place as follows: j
1) With chamfer toward base end of pump, INSTALL wear ring.

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Figure 1 - Impeller Wear Ring Installation Hub Wear Ring 774 Install flush with

/fxN ./{ diffuser surface

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// // n n-N}// n n n n Install flush \'

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'N i Skirt Wear Ring

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r 3 2) PRESS wear ring into diffuser bore until chamfered end '

) is even with diffuser bore edge toward base of pump.  ;

i l- f. Refer To Figure 1, and PRESS new impeller skirt wear ring in l place as follows: j i .

1) With chamfer toward motor end of pump, INSTALL l wear rmg.
2) PRESS wear ring into diffuser bore until chamfered end is even with diffuser bore edge toward motor end of pump.

4.4.2 IE base bearing inspection results are not satisfactory, OR wear rings were replaced, REPLACE base bearing as follows: l i

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a. PRESS base bearing from base.

b.- Using a small file or fine-grit abrasive, REMOVE any burrs from base bearing bore.

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( c. Using an approved cleaning solvent, CLEAN base bearing 1

bore.

d. INSTALLnew base bearing as follows:
1) INSTALL new O-ring (27).
2) INSTALL and TIGHTEN base plug (28).
3) PRESS base bearing into base bearing bore until bearing contacts base plug.

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n 4.5 Pump Assembly 4.5.1 Refer To Attachment 1, and INSTALL shaft (7) into base bearing (15) as follows:

a. PLACE base (13) to allow shaft to be installed in a vertical position.
b. INSERT shaft into base bearing until, shaft contacts base plug (28).
c. E necessary, ROTATE shaft to release air pocket between shaft and base plug.

4.5.2 With impeller skirt facing base, INSTALL impeller (10) on shaft.

l 4.5.3 SLIDE impeller on shaft, and ALIGN impeller lock pin hole with first-stage shaft lock pin hole.

4.5.4 ENSURE alignment of impeller and shaft lock pin holes.

4.5.5 With pilot end (taper) first, PLACE new drive lock pin (25) into impeller lock pin hole.

l V 4.5.6 Using suitable hammer and punch, carefidly TAP drive lock pin into impeller lock pin hole as follows:

l a. E an increase in resistance is observed, ROTATE impeller i and shaft to opposite end of lock pin hole, and ENSURE impeller and shaft lock pin holes are aligned.

b. INSTALL drive lock pin until, each end is 1/32 inch below impeller hub surface. )

I l 4.5.7 E necessary, using suitable file, lightly DRESS impeller hub lock i pin holes to remove any imperfections. j l

4.5.8 IMMERSE new gasket (11) in water, or COAT with approved l r grease.

4.5.9 PLACE gasket (11) on base (13).

4.5.10 With cavity of diffuser facing impeller, INSTALL diffuser (8) onto shaft.

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i 4.5.11 SLIDE diffuser on shaft to position impeller inside diffuser casing  ;

cavity.

l t 4.5.12 ASSEMBLE remaining pump stages as follows.

l a. With impeller skirt facing base, INSTALL impeller (10) on  !

shaft.  !

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b. SLIDE impeller on shaft, and POSITION impeller skirt into r diffuser casing wear ring. .i
c. ALIGN impeller and shaft lock pin holes. l
d. Refer To steps 4.5.4 through 4.5.7, and INSTALL drive .

lock pin (25).

e. IMMERSE new gasket in water, or COAT with approved grease.

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f. PLACE gasket on installed diffuser.
g. With cavity of diffuser facing impeller, INSTALL diffuser (8)  :

onto shaft.

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h. SLIDE diffuser on shaft and POSITION impeller inside j diffuser casing cavity. j 4.5.13 IMMERSE new gasket in water, or COAT with approved grease.

i 4.5.14 PLACE gasket on top diffuser. l 4.5.15 PLACE frame adapter (2) over base studs and onto top diffuser i stage gasket.

4.5.16 INSTALL four new sealing washers (38) onto studs. t 4.5.17 Using a soft-face hammer, TAP adapter and all diffuser casings,  !

and INSTALL nuts (23) finger tight.  ;

4.5.18 MEASURE end play of shaft and impeller assembly.

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4.5.19 RECORD the following onto Attachment 2:

O, End play of shaft and impeller assembly M&TE serial number Calibration due date C AUTION Oil must not be used when installing mechanical seal.

4.5.20 INSTALL mechanical seal as follows:

a. Using approved 0-ring lubricant, lightly LUBRICATE shaft.
b. SLIDE seal spacer (32) on shaft and into seal cavity.
c. With spring retainer portion first, SLIDE rotating half of seal (31) into seal cavity.
d. Using approved 0-ring lubricant, lightly LUBRICATE new housing 0-ring (6).
c. INSTALL new housing 0-ring (6) onto seal housing (29). I
f. ENSURE O-ring surface is not damaged or marred.

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g. INSTALL stationary half of seal (31) into seal housing.
h. PLACE seal housing onto shaft and SLIDE to frame adapter.
i. INSTALL and TIGHTEN capscrews (30) securing seal housing to frame adapter.

4.5.21 PLACE coupling onto pump shaft as follows:

a. ENSURE all burrs are removed from motor shaft extension.

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b. POSITION coupling with shaft extending halfway through coupling bore.
c. TIGHTEN coupling clamp screws over pump shaft.

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d. ENSURE coupling clamp screws for motor shaft are loose.  !

1 4.5.22 RIG and INSTALL motor (1) and motor adapter (2A) on frame I adapter (2) and SECURE with capscrews (18).

4.5.23 Using a suitable lever between seal housing and bottom of coupling, SECURE couplit g as follows:

a. RAISE shaft and i*npeller assembly as far up as possible, then LOWER to mid position of total travel,
b. TORQUE coupling clamp screws to 90 in-lbs (84 to 96 in-lbs).

4.5.24 RECORD the following onto Attachment 2:

Torque values i

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  • Calibration due date i

! i j 4.5.25 Using a soft-faced hammer, TAP motor adapter and diffuser i l

stages, and ROTATE coupling by hand until running member l turns freely. ,

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4.5.26 Evenly TORQUE base stud nuts to 60 ftalbs (57 to 63 ftalbs).

4.5.27 RECORD the following onto Attachment 2:

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Calibration due date l 4.6 Motor and Pump Installation 4.6.1 INSTALL pump aad motor as follows: I

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a. RIG and support weight of pump and motor. l
b. REMOVF covers from suction and discharge piping.

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.- c. INSTALL pump and motor and PERFORM the following: i INSTALL base clamps and SECURE with nuts and bolts. ,

CONNEC suction and discharge piping.  ;

4.6.2 INSTALL insulation and heat trace on the following:

Suction piping I Discharge piping i Pump 4.6.3 . CONNEC motor as follows:  !

a. CONNECT motor leadwires and grounds.  !

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b. RECORD landed leads onto WC 10 (Att)," Lifted Lead and Jumper Device Data Sheet."

! l l c. INSUIATE leadwires as necessary.

d. INSTALL conduit cover.

4.7 Operational Checkout C AUTIO N To, prevent damage to mechanical seal components, seal must be vented prior to runnmg pump.

4.7.1 WHEN system conditions permit, PERFORM the following:

NOTE i Coupling must be rotated by hand several times to completely vent pump.

! a. REQUEST Operations Department to fill, vent, and run j . pump.

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b. INSPECT all joints and seals for leaks.

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c. IE leakage is detected, REQUEST FLS or Engineering to )

! provide instructions for further maintenance.

d. NOTIFY Operations Department that pump maintenance is complete.

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5. REVIEW AND SIGN-OFF V;

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5.1 The review and sign-off of Attachment 2 and the AWO satisfy the review and sign-off of this procedure.

6. REFERENCES 6.1 NUSCo Accident Prevention Manual 6.2 Vendor Manuals 6.2.1 Peerless Pumps," Multistage Pumps, Types TMUB, TMUAII and J Jockey Pumps Instructions, Installation, Operation, Maintenance," Document No. 4848605 6.3 Administrative Procedures 6.3.1 CC 1," Control of Chemical Consumable Products" 6.3.2 WC 10, " Jumper, Lifted Lead, and Bypass Control" 6.3.3 WC 8," Control and Calibration of Measuring and Test Equipment" V 7.

SUMMARY

OF CHANGES 7.1 Original issue. l l

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' MP 725.2 Level of Use STOP THINK ' ACT REVIEW e Rev.0 General 19 of 24

l Attachment 1 Pump Cross-Section View (Typical) *

(Sheet 1 of 2)

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NOTE Three-stage pump  ;

. shown. M7-11 is a i five-stage pump. ,

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1 Attachment 1 Pump Cross-Section View (Typical)

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(Sheet 2 of 2)

ITEM # DESCRIPTION 1 Motor 2 Frame Adapter 2A Mo:or Adapter 3 Coupling 6 liousing O-Ring 7 Shaft 8 Diffuser

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9 Wear Ring I 10 Impeller 11 Gasket 12 Wear Ring 13 Base 15 Base Bearing 16 Plug 17 Canopy 18 Capscrew 23 Nut l

24 Base Stud 25 Drive Lock Pin l 27 Base Plug 0-Ring l 28 Base Plug 29 Sealliousing l 30 Capscrew 31 Seal i .

32 Seal Spacer 38 Sealing Washer i

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AttaMant 2

- Inspection Data Record (Sheet 1 of 3)

AWO NO. LOCALiD STEP NO. INSPECTION ACCEITANCE INSPECTION PERFORMED VERIFIED CRITERIA RESULTS BY/DATE BY/DATE 4.3.6 Wear Ring Clearances:

First Stage Impeller Hub Clearance s 0.020" - =

i ID - OD = CLR

=

Impeller Skirt Clearance -< 0.020" -

ID - OD = CLR Second Stag " "

=

-< 0'020" Impeller Hub Clearance ID - OD = CLR

=

-< 0'020" Impeller Skirt Clearance ID - OD = CLR Third Stage " "

=

Impeller Hub Clearance

<0 020" -

l ID - OD = CLR l =

< 0~020" -

Impeller Skirt Clearance -

ID - OD = CLR Fourth Stage " "

=

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j Impeller Hub Clearance -

ID - OD = CLR

- =

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=

Impeller Hub Clearance -< 0'020"

.ID - OD = CLR n- n_-

n Impeller Skirt Clearance -< 0'020" ID - OD = CLR M&TE Serial No. Cal. Due Date M&TE Serial No. Cal. Due Date  !

A > a MP 725.2 l Level of Use _. _. _,.....W~~- Rev*0

" STOP ^,. ,..._'THINK . ACT = ' REVIEW General ,d p. . J J, 22 of 24 i

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AttacMnt 2 U Inspection Data Record (Sheet 2 of 3) l STEP NO. INSPECTION ACCElTi.NCE INSPECTION PERFORMED VERIFIED CRITE RIA RESULTS BY/DATE BY/DATE I

4.3.8 Pump Shaft Runout:

Impellers 1st Stage TIR l 2nd Stage TIR I 3rd Stage TIR 4th Stage TIR

< 0.002" TIR 5th Stage TIR Mechanical Scal __ " TIR Coupling TIR l Base Bearing TIR i

l M&TE Serial No. Cal. Due Date

! 4.5.19 Shaft and Impeller Assembly

/32to3/16" 3 "

l End Play:

, 4.5.24 Coupling Clamp Screw Torque 90 in-lbs in-lbs (84 to 96 m-lbs)

M&TE Serial No. Cal. Due Date _.

4.5.27 Base Stud Nut Torque 60 ft Ibs ft lbs (57 to 63 ft lbs)

! M&TE Serial No. Cal. Due Date A

.( _ MP 725.2 Level of Use -c , m . . , _. . --

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