ML20140E306

Rev 12 to MP 717.1, Mssrv Main Stage Assembly & Valve Replacement & Cancellation Request Form

ML20140E306
Person / Time
Site:	Millstone
Issue date:	05/20/1997
From:	NORTHEAST NUCLEAR ENERGY CO.
To:
References
MP-717.1, NUDOCS 9706110320
Download: ML20140E306 (45)

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• NDS Document Transmittal 6/597 To:

Nuclear Regulatory Conunission Addreenee uniques 14o Document Control Desk ROUME h Washington, D.C. 20555 The following documents have been revised. You are currently on distribution for these documents. Verify that all documents are included in this distribution set.

DOCUMENT BEY COPIES MP 717.1 12 1

CANC. REQ-FORM 717.1-1, R2 2

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MAINTENANCE PROCEDURE 1

l Main Steam Safety Relief Valve Main Stage Assembly and Valve Replacement MP 717.1 Rev.12 bTOP Ac1 Rsviez.

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Approval:

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t PORC Mtg. No:

/-97-083 Date:

&2097 Effective Date:

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Level of Use subject Matter Expert:

General J. Pernal

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1 (~) MP 717.1 Level of Use sToe Tuinx Ac1 neview nev.12 General 3 of43 1 i p ir q 2.4.4 Consumables O Approved cleaning solvent such as Polywater Hydrafoam 2020 All-Purpose Cleaner Approved lapping compound such as Clove or Moco Approved thread lubricant and anti-seize compound such as Nuclear-Grade Never Seez I Approved leak detector such as Snoop Approved marking dye such as Mark-Tex Blue Approved lubricant such as DAG 156 Fine-grit abrasive Protective covers or wrap, (inlet and outlet main body flanges, and outlet piping flange) Lockwire (annealed 0.031 inch diameter) f'N] Low-lint cloths w Nitrogen supply capable of pressurizing valve body to 875 psig Scotch Brite pads 2.4.5 Spare Parts i Tab washer (101) l 1 1 Inlet gasket (130),(8 / OD X 7 /2 ID X 0.125) 2 1 5 Outlet gasket (132), (14 /4 OD X 11 /16 ID X 0.175) 3 Gasket (133), (1 /s OD X 1 ID X 0.100) 15 1 Gasket (134), (1 /32 OD X 1/16 ID X 0.100) = 15 5 Gasket (135),(7 /32 OD X 7 /32 ID X 0.135) = i 3 5 Gasket (136),(7 /4 OD X 7 /32 ID X 0.135) AU MP 717.1 Level of Use STOP THINK ACT REVIEW Rev.12 gg 6 of 43 y..-- q 2.5 Responsibilities (_/ 2.5.1 Performance Evaluations Department is responsible for liquid dye penetrant inspeciion of internal valve body surface and body welds. 2.5.2 IIcalth Physics Department is responsible for releasing valve for shipping.

3. PRECAUTIONS 3.1 Ensure all consumables to be used in or on power plant components are controlled in accordance with CC 1, " Control of Chemical Consumable Products," and a Restricted Use Permit has been issued as necessary.

3.2 Components being disassembled must be labeled or match marked to aid in reassembly. Delicate parts or critical mating surfaces must imt be match marked. 3.3 Approved thread lubricant and anti-seize compound must be applied to all threads prior to threading. 3.4 Ilt.ndle asbestos in accordance with UI WC 1 (Att)," Control of Asbestos Containing Materials." 3.5 These valves fall within the ASME Section XI boundary. Repair or replacement of pressure-retaining components must be evaluated in accordance with WC 3,"ASME Section XI Repair and Replacement Program." l 3.6 The entire safety or relief valve must be removed from service if any valve fails to function as designed, except for pressure setpoint requirements, l and the cause of the malfunction is not clearly determined, understood, and corrected. The valve must be disassembled, inspected, repaired, and tested with steam for proper operation before returning the valve to service. i ) O0 MP 717.1 Level of Use ST P THINK ACT REVIEW Rev.12 Gened 7 of 43 - -. - -.. ~ -. -.. - _ _. - .: s. 9 i l 4 't i j

4. INSTRUCTIONS

O i

4.1 Safety Relief Valve Assembly Removal 4 i 1 l l NOTE i j If any valve fails to function as designed, except for pressure setpoint requirements, and the cause of the malfunction is not clearly determineri, understood, and corrected, the entire valve must be removed from service, i disassembled, inspected, repaired, and tested with steam for proper j operation before returmng the valve to service i 4.1.1 Refer To Figure 1, and AWO and LOCATE valve to be worked. 4 4 ) Figure 1. Main Steam Lines / ~ South i j Personnel U'7"'II Ladder Airlock ) lO I l-51S-3A l Setpoint Equipment } I-MS-3F 1995 psig. Ilatch Reactor 5 Ig. t I 1-MS-3E l-MS-3D f Setpoint Setpoint I125 psig. ] 1110 psig. { 7 i-MS-3c 1-MS-3n Setpoint Setpoint l 1125 SI - 2 PR 1125 psig. 1 i Z j ladder i i i N / i i l D C H A 1O 1 MP 717.1 Level of Use STOP THINK ACT REVIEW Rev.12 General sor43 ] i i R .s 4 q i CAUTION Insulation is critical to performance of safety relief valves. Insulation must { be inspected before removal and stored in a safe area where insulation will j not be subject to damage. 4.1.2 INSPECT insulation for damage. j 4.1.3 IE insulation is damaged, REQUEST FLS CONSULT i Engineering. 4.1.4 Carefully, REMOVE valve insulation, and STORE in secure area. 4.1.5 RIG hoist and slings to valve assembly. 4.1.6 Refer To Attachment 1, and REMOVE outlet flange studs and nuts. 4.1.7 LABEL and STORE outlet flange studs and nuts. 4.1.8 LOOSEN but do not remove inlet flange nuts (114). O 4.1.9 REMOVE all but two inlet flange studs (105) and nuts (114). 4.1.10 Using hoist and slings, SUPPORT weight of valve. 4 4.1.11 REMOVE remaining inlet flange studs (105) and nuts (114). 4.1.12 LABEL and STORE inlet flange studs and nuts. 4.1.13 Refer To Attachment 6, and RECORD alllabeled items and storage location. 4.1.14 MAINTAIN valve as upright as possible, and REMOVE valve assembly from piping system. 4.1.15 Refer To Attachment 1, and REMOVE inlet gasket (130) and outlet gasket (132). O MP 717.1 Level of Use STOP THINK ACT REVIEW Rev.12 General 9 of 43 s j d 't i C AUTION 1 Protective covers must be installed on valve and piping to prevent damage j to seating surfaces and prevent debris from entering valve and piping. i 4.1.16 INSTALL metal protective cover on inlet piping flange. 4.1.17 INSTALL protective covers or wraps on inlet and outlet valve flanges and outlet piping flange. ] a 4.1.18 MAINTAIN valve as upright as possible, and TRANSFER valve 1 to controlled work area. 4.1.19 Refer 7b Attachment 6, and RECORD main body serial number. 4.1.20 IE valve assembly maintenance will not be performed on site, CONSULT IIcalth Physics Department and PREPARE valve for l shipping. i l 4.2 Base Assembly Removal i NOTE The base assembly can be removed in the dry well without removing the main body assembly. 4.2.1 Refer To Attachment 2 for appropriate valve condition and PERFORM the following: a. RIG hoist and slings to base assembly. b. SUPPORT weight of base assembly. 4.2.2 Refer To Attachment 1, and REMOVE lockwire from base-to-main-body studs (83). j l 1 ) i l MP 717.1 Level of Use STOP THINK ACT REVIEW Rev.12 Gened 10 of 43 I P i STOP WARNING STOP Main spring (100) is preloaded to 250 lbs and is located behind base l

assembly, i

4.2.3 REMOVE base assembly (21) as follows: f Refer To Figure 2, and using the sequence shown, LOOSEN a. but do not remove bolts (107), and nuts (115). l Figure 2. Holt Removal Sequence l 5 1 l 7 9 3 11 12 4 O' 8 10 26 b. REMOVE two bolts and nuts 180 apart. c. INSTALL drawbars in locations where bolts were removed. d. ENSURE weight of base assembly is supported by slings. e. REMOVE all but two remaining bolts (107), and nuts (115) located diametrically opposite to each other. f. Slowly and unifonnly UNBOLT last two bolts (107) and nuts (115) and RELEASE main spring preload. g. SLIDE base assembly along drawbars, and WIIEN clear of main spring (100), and studs (83), REMOVE base assembly. O MP 7171 Level of USe STOP THINK ACT REVIEW Rev.12 gggg 11 of 43 q C AUTIO N i Scaling surface of base assembly flange face and body flange face must not q be damaged when removing gaskets. j h. REMOVE gaskets (133,134, and 135 or 136), from base assembly or body flange. 1 l C A UTIO N J i i Protective cover must be installed on base assembly flange face and gasket i i surfaces to prevent damage to seating surfaces and prevent debris from entering assembly. l 4.2.4 INSTALL protective cover on base assembly flange face. j 4.2.5 MOVE base assembly onto a firm surface. 4.2.6 REMOVE main spring (100) and drawbars from main bcdy. ID f C A UTIO N i j Protective cover must be installed on body flange face and gasket surfaces to prevent damage to seating surfaces and prevent debris from entering 4 valve. ) 4.2.7 INSTALL protective cover on body flange face and gasket surfaces. 4.2.8 LABEL and STORE the following items: Bolts (107) r Nuts (115) Main spring (100) 4.2.9 Refer To Attachment 6, and RECORD all labeled items and base assembly serial number. MP 717.1 Level of Use STOP THINK ACT REVIEW Rev.12 General 12 of 43 .. - - - -. ~ - -. - -. -. 1 4

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4.3 Disassembly of Main Stage l 4.3.1 E necessary, Refer To Attachment 3, and POSITION valve for disassembly. 4.3.2 Refer To Attachment 1, and BEND i ;b of tab washer (101) flat. l 4.3.3 Using main piston spanner tool, HOLD piston (102) and j LOOSEN nut (103). 4.3.4 REMOVE the following: a. Nut (103) i b. Thb washer (101) c. Main piston spanner tool 4.3.5 INSTALL main internal lift tool in place of tab washer (101). 4.3.6 INSTALL nut (103) and TORQUE to 20 ftalbs (15 to 25 ftelbs). C A UTIO N Diametral clearance between main guide (42) and body ( d possible 0.003 inch. During removal, do not tilt guide so as to avo,25)is 0.001 to i jamming of guide in body. NOTE 1 Application of lubricant at 7 /g-inch diameter gasket groove will aid removal. The lubricant between main guide (42) and body (25) will allow for easier removal. If assembly becomes stuck during removal, application oflubricant is to be repeated. Additionally, gently tapping main disc (48) against blind side of main guide (42) in an outward direction will aid in freeing guide from body. 1 4.3.7 E necessary, APPLY approved lubricant to 7 /g-inch diameter gasket groove. 4.3.8 Using main internal lift tool, REMOVE main stage internal subassembly. MP 7171 Level of Use STOP THINK ACT REVIEW Rev.12 General 13 of 43 I ii- ) l 4.3.9 E main stage internal subassembly sticks, APP 12 additional approved lubricant and as necessary gently TAP main disc (48) against blind side of main guide in outward direction. 2 i 4.3.10 DISASSEMBLE main stage internals as follows: ) 4-l a. REMOVE nut (103). l 2 b. REMOVE main internal lift tool. i c. Using soft-faced vise or clamp, SECURE main disc (48) with axial centerline in vertical position. I j d. INSTALL main piston spanner tool onto piston (102). 1 NOTE i j. It may be necessary to free piston from main disc at threaded joint by j application of axial impacts er appli:ation of lubricant. The impact force j may be applied alternatively by tapoing on inain piston spanner tool face j (downward) followed by applying a force to blind side of piston by use of p main guide as " pull haramer." l s I e. Using main piston spanner tool, UNSCREW piston (102) from main disc (48). i i f. E piston (102) sticks, APPLY approved lubricant and as ) necessary and using main guide as a " pull hammer," IMPACT j blind side of piston axially. i i g. REMOVE main guide (42) and main piston spanner tool. ll h. REMOVE seal ring (71) from main guide (42). i. REMOVE piston rings (99) from piston (102). i [ NOTE } Removing dowel pin (139) from main guide (42) is not required. ]- 1' j. REMOVE main disc (48) from vise or clamp. 4.3.11 LABEL and STORE all parts. O MP 717.1 Level of Use STOP THINK ACT REVIEW Rev.12 Generai u of43 s t 4 i 4.3.12 Refer To Attachment 6, and RECORD all labeled items. O 4.4 Safety Relief Valve Cleaning, Inspection and Maintenance C AUTION 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. i 4.4.1 Using approved cleaning solvent, CLEAN all components. ) 4.4.2 Using a fine-grit abrasive or Scotch-Brite pads, REMOVE the following from all mating surfaces: Dirt i Paint Loose scale = Corrosion = Burrs Raised surfaces NOTE Structural defects and damage include breakage, cracks, deformation, distortion, corrosion, pitting, scoring, scratches, crosion, abrasion, galling, and indications of misalignment. 4.4.3 Visually INSPECT all components for wear, structural defects, and damage. 4.4.4 JE inspection results are not satisfactory, Refer To ASME Section )

I Repair and Replacement Program and EVALUATE i

i pplicable component (s). ] 1 O MP 717.1 Level of Use ST P THINK ACT REVIEW Rev.12 General 15 of 43 \\ t 7-. 4.4.5 Visually INSPECT body (25) for the following: j i 3 'd Seat surface clean and free of blemishes. Main guide bore ID (7 /3 nch diameter) free of any raised 1 i metal. Gasket seating surfaces free of blemishes that extend radial boundary of gasket seal. 4.4.6 INSPECT main guide (42) for the following: OD free of any raised metal. ID shall have a 32 RMS finish or better (both diameters). Ring groove clean and free of sharp edges. 4.4.7 INSPECT main disc (48) for the following: Seat surface clean and free of blemishes. OD (both diameters) shall have a 32 RMS finish or better. (3 C) Thread form and finish general condition. 4.4.8 Visually INSPECT piston (102) for the following: OD free of any contact or wear indications. Ring grooves clean and free of sharp edges. Thread form and finish general condition. 4.4.9 Visually INSPECT piston rings (99) for the following: OD free of significant wear. Faces of rings free of blemishes. t Edges of OD and face free of burrs or rolled over material. 4.4.10 Visually INSPECT seal ring (71) for the following: OD and face free of blemishes O LJ MP 7I7 I Level of Use ST P THINK ACT REVIEW Rev.12 General 16 of 43 4.4.11 PERFORM liquid dye penetrant inspection of internal valve body J q surface as follows: a. Using a wire brush, CLEAN internal valve body surface in i l area of main seat ring and up to 2 inches around seal weld. 1 b. REQUEST Performance Evaluations perform liquid dye penetrant inspection of internal valve body surface in area of main seat ring and up to 2 inches around seal weld for linear l discontinuities. 6 Refer To Attachment 6, and RECORD inspection results. c. l d. If unacceptable indications are found, REOUEST FLS i consult Engineering for further guidance. i j' IE repairs are required, INSPECT entire valve body internal c. surface with liquid dye penetrant. 4 i' 4.4.12 PERFORM liquid dye penetrant inspection of valve body welds as follows: i i l a. Using a wire brush, CLEAN welds between valve body, plate, i I and pilot inlet tube. i b. REQUEST Performance Evaluations perform liquid dye penetrant inspection of welds between valve body, plate, and pilot inlet tube for linear discontinuities. j c. Refer'Ib Attachment 6, and RECORD inspection results. d. IE there are mdications that are not acceptable, REQUEST FLS consult Engineering for further guidance. C AUTIO N i The repair or replacement of all pressure-re!.aining components must be evaluated in accordance with the ASME Secnon XI Repair and i Replacement Program. 4.4.13 IE lapping main disc-to-seat, PERFORM the following: a. VERIFY all main disc seating surfaces have a 32 RMS finish or better. j ~ t MP 717.1 i Lovel of Use STOP THINK ACT REVIEW Rev.12 j General 17 of 43 m L !e i l l s

m b.

Refer To Attachment 4, and INSTAI.L main guide (42). s jh i Using an approved lapping compound. LAP main disc (48) to c. seat with main internal lift tool in place. j d. Using an approved cleaning solvent, CLEAN disc and valve seat scaling surfaces. e. Using contact inspection technique, INSPECT disc and valve seat for proper contact as follows: L 2

1) APPLY a thin, tint coat of approved marking dye to valve seat.

4 i

2) POSITION lapped surface of disc onto valve seating surface and ROTATE disc 90.

1

3) REMOVE disc from valve body.

4) Visually INSPECT main disc-to-valve seat contact q

pattern. IO V c^urios V i l A satisfactory main disc-to-valve seat contact check must indicate the following: 3 An unbroken ring of contact over at least 75 percent of seating surface = i width throughout 360 of seating surface. I No high or low spots. i a

5) IE contact check does not indicate a ring of contact over at least 75 percent of seating surface width throughout 360 of surface DR high or low spots are detected, 5

l CONSULT FLS for fut ther guidance. j f. Using an approved cleaning solvent, CLEAN disc and valve j seat sealing surfaces, and ENSURE all marking dye and ~ lapping compound are removed. 4.4.14 IE machining valve components, PERFORM the following: a. ENSURE all machined surfaces have a 32 RMS finish or l better. MP 717 I Level of Use ST P THINK ACT REVIEW Rev.12 General 18 of 43 i ,e M ln b. Refer To Attachment 4, and as applicable, ENSURE all body ,i i seating and main guide surfaces are concentric, perpendicular, or parallel. c. Refer To Attachment 4, and ENSURE all main disc, seat, and main guide surfaces are concentric. d. ENSURE seat surface and intersecting diameter are " dead true" to each other. NOTE Recommended minimum thickness (normal to seat surface) of hardface is 0.090 inch. TAKE as light a cut as possible on seat or main disc to e. preserve hardface thickness. f. ENSURE the following main disc and seat attribute requirements are met: Main disc (48) seat included angle shall be 59 to 60. ,o N.) Main seat (female) included angle shall be 62 to 63 by 0.170 inch deep (maximum). g. Using low-lint cloth and approved cleaning solvent, CLEAN all parts. l l (%. V MP 717.1 Level of Use STOP THINK ACT REVIEW RcV.12 i General 19,743 t d t 4.5 Assembly of Main Stage i NOTE 1. Independent Verifier generally designates a Performance Evaluations Inspector which may also be a Job Supervisor, FLS, Maintenance Specialist, Maintenance Technician, Independent Mechanic, or Electrician if approved by FLS. 2. Step 4.5.1 constitutes an Inspection Hold Point. Cognizant FLS may j clect to waive inspection as applicable to specific activity. i 4.5.1 Refer To Attachment 1, and, E main guide (42) is a replacement i j part, PERFORM the following: 1 a. INSTALL main guide (42) in body. b. Using a depth micrometer, MEASURE mismatch between top face of main guide and flange face of body. l c. RECORD the following onto Attachment 6: i i Mismatch dimension Caliper serial number l Calibration due date q i j d. Refer To Attachment 1, and E face of main guide (42) is not flush to 0.005 inch below body flange face, PERFORM the following:

1) E face of main guide is above body flange face, TRIM i

j main guide face. 1 i

2) E face of main guide is below body flange face greater

] than 0.005 inch, REPLACE main guide.

3) Go % step 4.5.1.b, and MEASURE mismatch between -

top face of main guide (42) and flange face of body. 4.5.2 INSTALL piston rings (99) onto piston (102). 4.5.3 INSTALL seal ring (71) onto main guide (42). O MP 717.1 Level of Use ST P THINK ACT REVIEW Rev.12 General 20 of 43 y9 A

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4.5.4 Using soft-faced vise or clamp, SECURE main disc (48) with threaded end up. 4.5.5 INSTALL main guide (42) onto main disc (48). 4.5.6 INSTALL main piston spanner tool onto piston (102). 4.5.7 Using Never-Seez or equivalent, LUBRICATE threads of main disc (48). 4.5.8 Using low-lint cloths, CLEA.N off any excess lubricant. i 4.5.9 Using main piston spanner tool, INSTALL piston (102) onto main disc (48). NOTE Step 4.5.10 constitutes an Inspection Hold Point. Cognizant FLS may elect to waive inspection as applicable to specific activity. 4.5.10 REQUEST independent verification, and TORQUE piston (102) to 100 ftelbs (95 to 105 ftalbs). 4.5.11 RECORD the following on Attachment 6: Torque value Torque wrench serial number Calibration due date 1 4.5.12 REMOVE main piston spanner tool. 4.5.13 INSTALL main internallift tool. 4.5.14 Refer To Attachment 1, and INSTALL nut (103) and TORQUE to 20 ftelbs (15 to 25 ftelbs). f 4.5.15 Using Never-Seez or equivalent, LUBRICATE main guide (42). O

1. 717'l Level of Use STOP THINK ACT REVIEW Rev.12 ggj 21 of 43

I je 2 '\\ 3 C AUTIO N Main stage internal subassembly must be properly oriented during i installation for correct alignment of main guide passage located in body. This alignment must be(42) drain hole with mating visually verified during mstallation. Drain groove on ID of main guide (42) should be in line with axial centerline of mlet nozzle and at closest possible location towards inlet side of valve. 4.5.16 Using main internal lift tool, INSTALL main stage internal l subassembly. l' 4.5.17 Visually ENSURE main stage internal subassembly is aligned j with mating passage in body. 1 l 4.5.18 REMOVE nut (103) and main internal lift tool. i 4.5.19 INSTALL new tab washer (101). i l l 4.5.20 INSTALL nut (103). t O sore j Step 4.5.21 constitutes an Inspection lloid Point. Cognizant FLS may elect j to waive inspection as applicable to specific activity. 4 i j 4.5.21 Using main piston spanner tool, If OLD piston (102) stationary, ) and TORQUE nut (103) to 50 ftelbs (45 to 55 ftelbs). 1 l 4.5.22 RECORD the following on Attachment 6: ) Torque value l j lbrque wrench serial number i Calibration due date 2 4.5.23 REMOVE main piston spanner tool. 4.5.24 Refer To Attachment 1, and BEND tab washer (101) into cutout at piston (102) and onto one side of nut (103). O MP 717.1 Level of Use STOP THINK ACT REVIEW Rev.12 General 22 0r 43 i -~ o t e, 4.6 Base Assembly Installation V 4.6.1 Refer To Attachment 6, and RECORD serial number of base assembly. 4.6.2 REMOVE protective covers or wrap. 4.6.3 Refer To Attachment 1, and INSTALL new gaskets (133,134, and 135 or 136). 4.6.4 INSTALL main spring (100). 4.6.5 INSTALL twc drawbars located 180 diametrically opposite, 4.6.6 Refer To Attachment 2, and for the appropriate valve condition, RIG hoist and slings to base assembly. 4.6.7 LIFT base assembly and align match marks for mating components. 4.6.8 LOWER or SLIDE base assembly along drawbars. 4.6.9 SUPPORT weight of base assembly. l 4.6.10 Using Never-Seez or equivalent, LU13RIC/.I'E threads of bolts l (107), and studs (83). 1 4.6.11 INSTALL two bolts (107) and nuts (115) 180 apart and TIGliTEN until body and base make contact with spring. 4.6.12 INSTALL remaining bolts (107), studs (83) and nuts (115) and REMOVE drawbars. i OV MP 717.1 Level of Use sToe rHiNx AcT neview Rev.i2 j General 23 of 43 o s t Refer To Figure 3, and uniformly TIGIITEN bolts (107) and ,r a. nuts (115) wrench tight, two turns at a time, in the sequence shown and COMPRESS spring (100). i Figure 3. Base to Main Body Tightening Sequence 51 1 7 9 3 11 12 4 8-10 26 4.6.13 REMOVE slings and hoist. NOTE d(m Steps 4.6.14 and 4.6.16 constitute an Inspection IIold Point. Cognizant FLS 2 may elect to waive inspection as applicable to specific activity. 4.6.14 REOUEST independent verification, and TORQUE bolts (107) and nuts (115) as follows: a. Refer To Figure 3, and using the tightening secpence shown, TORQUE bolts and nuts to 710 ftalbs (675 to 745 ftalbs). 4.6.15 RECORD the following on Attachment 6: lbrque value Torque wrench serial number Calibration due date 4.6.16 REQUEST independent verification, and SECURE studs (83) as follows: OO MP 717.1 Level of Use ST P THINK ACT REVIEW Rev.12 Genera 24 of 43 8 _3 .w.. s a. Refer To C MP 715C," Installation of Lockwire and Lockplates," and LOCKWIRE studs (83). b. Refer To Attachment 6, and RECORD installation of lockwire. 7 4.7 Main Stage Seat Tightness Evaluation 5 h 4.7.1 Refer To MP 717.7," Target Rock Safety Relief Valve-Topworks Changeout," and INSTALL topworks on base assembly. f 4.7.2 Refer To Attachment 5, and PERFORM the following: INSTALL blind flange, with centrally located inlet connection a. for pressurization of valve with nitrogen gas, on valve inlet. b. Refer To MP 717.9, " Gagging Target Rock Safety / Relief l Valves,"and GAG topworks assembly. 4.7.3 PERFORM leak test as follows: ,l' C AUTIO N \\ Pressurize valve body at a maximum of 50 psi per second, i a. PRESSURIZE valve body to 400 psig. b. ISOLATE nittogen supply to prevent increase in pressure to inlet. C AUTIO N Apply fluid and view main disc-to-seat area as indirectly as possible to avoid injury in the event of inadvertent opening of valve. c. APPLY approved leak detector to main disc-to-seat area. d. EVALUATE main disc-to-seat tightness as follows: i

1) INSPECT circumferential interface of disc and seat for bubbles.

O MP 717.1 Level of Use STOP THINK ACT REVIEW Rev.12 Gened 25 of 43 o i k ( l l

2) IE_circumferential interface of disc and seat emits no bubbles or a slow generation of fine foam like bubbles, 1

Go To step 4.7.3.f and DEPRESSURIZE valve body.

3) IF_circumferential interface of disc and seat emits a constant generation of large bubbles, Go To step 4.7.3.e and INCREASE valve body pressure.

c. PRESSURIZE valve body as follows: i C AUTIO N Valve body pressure must not exceed 875 psig.

1) IE a 100 psi, increase in valve body pressure exceeds 875 psi., Go To step 4.7.3.f. and CONSULT FLS.

2) IE valve body pressure will not exceed 875 psig, INCREASE valve body pressure by 100 psi., and Go To step 4.7.3.d. and EVALUATE seat tightness.

f. DEPRESSURIZE valve body inlet to O psig. g. Refer To Attachment 6, and RECORD main stage seat tightness. h. Refer To Attachment 5, and REMOVE blind flange. i. Refer To MP 717.9, " Gagging Target Rock Safety / Relief Valves,"and REMOVE gagging tool from topworks assembly, j. Refer To MP 717.7," Target Rock Safety Relief Valve--Topworks Changeout," and REMOVE topworks from base assembly. l O MP 717.1 Level of Use STOP THINK ACT REVIEW Rev.12 General 26 of 43 ? l k 4.8 Safety Relief Valve Assembly Installation O 4.8.1 Refer To Attachment 6, and RECORD main body serial number. 4.8.2 VERIFY serial number of main body matches AWO. 4.8.3 MAINTAIN valve as upright as possible, and TRANSPORT valve - 1 assembly to second floor of dry well. 4.8.4 REMOVE protective covers and wrap. j \\ 4.8.5 RIG hoist and slings to valve assembly. 4.8.6 MAINTAIN valve as upright as possible, and LIFT and POSITION valve close to piping inlet flange. 4.8.7 Refer To Attachment 1, and INSTALL new inlet flange gasket (130). 4.8.8 INSTALL valve into main steam system. j 4.8.9 INSTALL and finger TIGIITEN inlet flange studs (105) and nuts (114). Cs 4.8.10 INSTALL and finger TIGIITEN four outlet flange studs and nuts. 4.8.11 INSTALL new outlet flange gasket (132). 4.8.12 INSTALL and finger TIGI-ITEN remaining outlet flange studs and nuts. i i I I MP 717.1 Level of Use ST P T!!!NK AT REVIEW Rev.12 General 27 of 43 j i j' 6 ~ l 'O xore 1. Steps 4.8.13 and 4.8.14 constitute an Inspection Iloid Point. Cognizant l j FLS may elect to waive inspection as applicable to specific activity. l 2. Due to physical configuration of vaive body, bolts in sequence j positions 2 and 6 must be tightened using a slugging wrench. 3. Compression of gasket from initial thickness of 0.125 inch to final i thickness of 0.090 to 0.100 inch is required. Tightening the fasteners approximately 1M turns-of-the-nut (equivalent to the required ] torque) will produce the 0.025 to 0.035 inch of bolt stretch necessary for the proper gasket compression. 4 4.8.13 Refer to Figure 4, and TORQUE or TIGIITEN equivalent j turns-of-the-nut, inlet flange nuts (114) in the sequence shown as follows: j Figure 4. Inlet Flange Torque Sequence a i 5 1 { 7 j 9 !O t 3 11 12 4 4 I i i 8 10 26 Sequence 2 and 6 occur in the area i where outlet and inlet flanges meet. j a. REQUEST dual verifier for torquing and tightening. b. MARK stud and nuts at position 1, and TORQUE nuts to 25 ftelbs (20 to 30 ftelbs). i ) c. OBSERVE amount of nut travel required to obtain torque value. d. Using slugging wrench at position 2, TIGilTEN nut to same turn-of-the-nut travel observed in step 4.8.13.c.

O h1P 717.1 Level of Use STOP THINK ACT REVIEW Rev.12 i

Genera 28 of 43 i i j, I ( l l Uniformly TORQUE nuts in positions 3,4, and 5 to 25 ftelbs e. 1 (20 to 30 f t lbs). f. Using slugging wrench at position 6, TIGHTEN nut to same { j turn-of-the-nut travel observed in step 4.8.13.c. g. Uniformly TORQUE remaining nuts to 25 ft lbs (20 to 30 P l ftalbs'.) 4.8.14 Refer To step 4.8.13 for sequence, and using the following l j increments TORQUE inlet flange nuts: 1 a. 250 ftelbs (240 to 260 ftalbs) b. 500 ftelbs (475 to 525 ftelbs) i f j-c. 750 ftelbs ( 715to 785 ftalbs) f s d. 1020 ftelbs (970 to 1070 ft lbs) l 4.8.15 RECORD the following on Attachment 6: e } Torque value Torque wrench serial number 7 i Calibration due date I i t t t i i j i 3 - 2 i i i i i i O ~ MP 7171 Level of Use STOP THINK ACT REVIEW Rev.12 QOnOral 29 of 43 l 4 i r s. s, 4.8.16 REQUEST independent verification, and TORQUE outlet ,m ( ) flange nuts as follows: w.) Figure 5. Outlet Flange Torque Sequence 5 1 13 7 9 15 3 12 11 4 16 10 8 14 2 6 Refer To Figure 5, and using the tightening sequence shown, a. ,m TORQUE bolts and nuts to 25 ftelbs (20 to 30 ftalbs). t \\ \\.) b. Using the tightening sequence shown, '. JROUE bolts and nuts to 100 ft lbs (95 to 105 ft.lbs). c. Using the tightening sequence shown, TORQUE bolts and nuts to 175 ft+1bs (165 to 195 ftelbs). d. Using the tightening sequence shown, TOROUE bolts and nuts to 225 ftelbs (235 to 245 flalbs). e. Using the tightening sequence shown, TORQUE bolts and nuts to 350 ft.lbs (335 to 365 ft lbs). 4.8.17 RECORD the following on Attachment 6: Torque value Torque wrench serial number = Calibration due date ,O V

1. ' 7I 7'I Level of Use STOP THINK ACT REVIEW RcV.12 Gened 30 of 43

L (

5. REVIEW AND SIGN-OFF i

\\ 5.1 The review and sign-off of this procedure is satisfied by the review and sign-off of Attachment 6 and the AWO. i

6. REFERENCES 6.1 NNECo Accident Prevention Manual 6.2 Drawings 4

6.2.1 NUSCo Drawing 25202-29121, sheet 42 " Outline Drawing For 1 - M S - 3A, 1 - M S - 3 B, 1 - M S - 3 C, 1 - M S - 3 D, 1 - MS - 3 E, 1-MS-3F Model 7567F 6 X 10 Relief Valve" Revision 1 6.2.2 NUSCo Drawing 25202-29121, sheet 43 " Outline Drawing For 1 - M S -3 A,1 - M S - 3 B,1 - M S - 3 C, 1 - M S - 3 D,1 - MS - 3 E, 1-MS-3F Model 7567F 6 X 10 Relief Valve" Revision 2 6.2.3 NUSCo Drawing 25202-29121, sheet 44 "Part List Model 7567F 6 X 10 Safety Relief Valve" Revision 1 j 6.2.4 NUSCo Drawing 25202-29121, sheet 45 "Part List For j p 1 - M S - 3 A, 1 - M S - 3 B, 1 - M S - 3 C, 1 - M S - 3 D,1 - M S - 3 E, (_/ 1-MS-3F Model 7567F 6 X 10 Relief Valve" Revision 2 6.2.5 NUSCo Drawing 25202-29121, sheet 46 "Part List Model 7567F 6 X 10 Safety Relief Valve" Revision 1 6.2.6 NUSCo Drawing 25202-29121, sheet 47 "Part List Model 7567F 6 X 10 Safety Relief Valve" Revision 1 6.3 Vendor Manuals 6.3.1 25202-726-001A, Target Rock Corp," Safety / Relief Valve Model 7567F Technical Manual" 6.4 Administrative Procedures 6.4.1 CC 1," Control of Chemical Consumable Products" 6.4.2 U1 WC 1," Unit 1 Work Control Process" 6.4.3 WC 3,"ASME Section XI Repair and Replacement Program" O MP 717.1 Level of Use STOP mlNK ACT REVIEW RcV.12 Genera 31 of 43 4 A L 6.4.4 WC 8, " Control and Calibration of Measuring and Test f Equipment" l 6.5 Maintenance Procedures 6.5.1 .C MP 715C," Installation of Lockwire and Lockplates" 6.5.2 MP 717.7," Target Rock Safety Relief Valve-Topworks 4 Changeout" i 6.5.3 MP 717.8," Main Steam Safety Relief Valve-Solenoid ] Changeout (EO)" + 6.5.4 MP 717.9," Gagging Target Rock Safety / Relief Valves" { i 6.6 Other Documents i i 6.6.1 GEI 30077F,"GE Industrial & Power Systems Steam 'Ibrbine - Metallic Spiral Wound Gaskets" b 6.6.2 US NRC IEB 80-25 i 5 6.6.3 GE Service Information Letter, SIL #196, Supplement 6 lO 6.6.4 GF, Service Information Letter, SIL #196, Supplement 12 f

7.

SUMMARY

OF CIIANGES 7.1 Revision 12 modifies the procedure to incorporate new format criteria specified in Rev.1 of DC 2," Developing and Revising Millstone j

Procedures and Forms."

I 7.2 Revision 12 modifies the procedure to refer to MP 717.8," Main Steam

[

Safety Relief Valve-Solenoid Changeout (EO)," for removal and installation of solenoid.

i i-j-

7.3 Revision 12 deleted Maint. Form 717.1-1 and created Attachment 6.

Data previously recorded on Maint. Form is now recorded on 5.

7.4 Revision 12 added main stage seat tightness evaluation.

7.5 Revision 12 modifies and improves upon graphics.

i O

MP 717.1 Level of Use STOP THINK

.ACT REVIEW Rev.12 General 32 0f 43

1 Attachmept 1 g

Valve Assembly Exploded View (Sheet I of 2) i 135 or 136

)

(depending on main body configuration) f i

100 103 i

101

-]

1,)

102 y

\\

/

\\

i 42

\\

139

\\

p/

115 48 i

\\

h k

J$

/

/

1

,_/

/o

,/

00

/

o g

g 0

p/ 115 tl I

114

=

g y

O O d[

D

/'

83 132 130 m

133 s s

o

/

j Main Body oo 107 114 Base Assembly 2

i 1

A U

MP 717.1 Level of Use STOP THINK ACT REVIEW Rev.12 General 33 0f 43

a Attachmept 1 g

Valve Assembly Exploded View (Sheet 2 of 2)

,r3

'w, ITEM #

DESCRIPTION 21 BASE ASSEMBLY 25 BODY 42 MAIN GUIDE 48 MAIN DISC 71 SEAL RING 83 STUD 99 PISTON RING 100 MAIN SPRING 101 TAB WASIIER 102 PISTON 103 NUT 105 STUD 1

107 BOLT j

114 NUT s

115 NUT

('J 130 INLET GASKET 132 OUTLET GASKET 133 GASKET 134 GASKET 135 GASKET 139 DOWEL PIN l

( ]i MP 7171 Level of Use STOP THINK ACT REVIEW Rev.12 Genera 34 of 43

Attachment.2. g Base Assembly Hoisting (Sheet 1 of 2)

J L 1/4 ton lift capacity J

Valve Installed in pjping. system I

1

(

ll 1

I Il I

Lifting eyebolts f

1/2-13,3 places Base-to-Main Body Studs i

. Vg N

i ai f

j Withdraw along

-* axial centerline 1

until o

clear of ma,n i

i

%m spring

,[

,-l j'

and studs

_[

Main Spring Drawbar I

1 inch dia. X 12 inches I

long two required b@

O

^

MP 717.1 Level of Use STOP THINK ACT REVIEW Rev.12 General 35 or 43

Attachmegt.2, ;

Base Assembly Hoisting (Sheet 2 of 2) i Lift vertically until 1/4 ton lift capacity clear of main spring and studs Valve not Installed in nipine system Lifting eyebolts 1/2-13,3 places l

w_

/ Main Spring li g

O Flange face I

pr tectimom Base-to-Main Body Studs Flange face I

l protective cover U//////////

O MP 717.1 Level of Use STOP THINK ACT REVIEW Rev.12 General 36 of 43

Attachmegt.3i ;

Valve Assembly Hoisting

~3 (Sheet 1 of 2) u)

I ton lift capacity a L f

i 1

r 1

I I

I I

\\

\\

T ~

Ipp O

I

(

/

N m

Lifting eyebolts Flange face i

1/2-13,2 places protective covers L

1 N\\

\\\\\\\\

h\\\\

)

O MP 717.1 Level of Use STOP THINK ACT REVIEW Rev.12 General 37 of 43

,. 4, i i Valve Assembly Hoisting (Sheet 2 of 2) t l

-t I

i l

+-

' ~ ~

For 1/2-13 lifting J

i

/ eyebolts (3 places) 1

-t-

/

/l I

4, n..

• W

'T l

o s

b h

(a g:/

l l

(

l 1

I lh]

b-For 1/2-13 lifting eyebolts (2 places) 40,

~

sg nnmm; y.a g

l h4 t

iP(1 hw, r5mi-

:1

't y',j i-e

~

x

./

-)

c'm.. :'

t__

(

a ov MP 717.1 Level of Use ST P THINK ACT REVIEW Rev.12 General 38 of 43

i io n *>

Attachme,76 4, g Main Stage Lapping

/

(Sheet 1 of 1) i l

• Guide surfaces:

main guide OD Main internal lift f

body ID tool T-10060-1

• Guide surface:

main guide ID (mates with piston rings)

(

Nut 3

r

\\

/

\\'

/

l

\\

/

/

Main Guide

\\

q f Y.N $

• / \\'

• Guide surfaces:

i i

i i

i 4{j l

main disc OD 1

j main guide ID N

i i

l Body k

• Seating surfaces:

j main d,sc-to-seat i

3 r

g r

i

\\

N i

s Main Disc

\\

J

'R r x

)

I I

\\

=

N g\\

• Main seat Note:

Surfaces critical for machining.

Attributes are highlighted

(*) in this figure.

diameter O

MP 717,1 Level of Use ST P THINK ACT REVIEW Rev.12 j

General 39 of 43

= _ - _.

e ra p

Attachmqnt 5,,1 l

Main Stage Leak Test Setup l

(Sheet 1 of 1) i

\\

CAUTION Pilot Gag Tool must be installed. Secure gag tool-center stud finger tight when inlet pressure is zero.

O N

A(

f$~

CAttrioN O Q Test Gage

((

View main seat as indi-g s

s N rectly as possible to

.J [ O

\\

avoid personal injury in the event ofinadvertent

}

opening of main stage.

4

@g i

s Regulated Nitrogen Supply 1000 psig max.

ry

'V W' 7171 Level of Use STOP THINK ACT REVIEW Rev.12 Gened 40 of 43

A A

O<

O Attak ent 6 U

i i

S Inspection Data Record (Sheet 1 of 3) l AWO NO.

LOCALID o

STEP NO.

INSPECI' ION ACCEL'I'ANCE INSPECI' ION PERFORAIED INDEPENDENT l

CRITERIA RESULTS IW / DATE VERIFICATION HY/DATE 4.1.13 Inlet and Outlet Flange Studs N/A Labeled items:

and Nuts Labeded and Loca-

[

tion Stored N/A Location stored:

l 4.1.19 Main Body Serial Number N/A Main body removed Serial No.

! 4.2.9 Base Assembly Items Labeled N/A Labeled items:

and Base Assembly l

Serial Number NM Base assembly Serial No.

4.3.12 Main Body Items Labeled N/A Labeled items:

3 N/A i

4.4.11 Liquid Dye Penetrant Inspec-No unacceptable tion of Main Seat Ring and indications OSAT QUNSAT Seal Weld i

MP 717.1 Level of Use Rev.12 General STOP THINK ACT REVIEW l

41 of 43

1 O

O V

Atta dnt 6 V

?*

Inspection Data Record (Sheet 2 of 3) r i

STEP NO.

INSPECTION ACCERTANCE INSPECTION PERFORMED INDEPENDENT 1

CRITERIA RESULTS HY / DATE VERIFICATION HY/ DATE 4.4.12 Liquid Dye Penetrant Inspec-No unacceptable SAT QUNSAT I

tion of Valve Body Welds indications l

4.5.1.c If Required Mismatch Between Top Face of 0.000 to 0.005 inch inch Guide and Flange Face of below body flange face Body l

' M&TE Serial No.

Cal. Duc Date r

4.5.11 Piston-to-Main Disc Torque 100 ft lbs (95 to 105 ft lbs) ft lbs

[

M&TE Serial No.

Cal. Duc Date 4.5.22 Nut-to-Piston Torque 50 ftalbs (45 to 55 ft lbs) ftalbs

]

M&TE Serial No.

Cal. Due Date 4.6.1 Installed Base Assembly N/A Base asembly N/A Serial Number Serial No.

4.5.15 Base Assembly Bolt and Nut 710 ft lbs Torque (675 to 745 ftalbs) ft lbs M&TE Serial No.

Cal. Due Date 4.6.16.b Installation of Lockwire Lockwire installed.

SAT UNSAT l

l I

MP 717.1 Level of Use Rev.12 General STOP THINK ACT REVIEW 42 cf 43 t

t_

p A

.k d

Atta sdnt 6 U

i

,w Inspection Data Record (Sheet 3 of 3)

STEP NO.

INSPECTION ACCElrrANCE INSPECTION PERFORMED INDEPENDENT CRITERIA RESUI.TS HY/ DATE VERIFICATION HY/DATE 4.7.3.g Main Seat Tightness Zero bubbles or slow gen-OSAT QUNSAT eration of fine foam like i

bubbles 4.8.1 Installed Main Body N/A Main Body N/A t

Serial Number Serial No.

4.8.15 Inlet Flange Nut Torque 1020 ft lbs (970 to 1070 ft lbs) ft lbs

[

M&TE Serial No.

Cal. Duc Date i

4.8.17 Oulet Flange Nut Torque 350 ft lbs (335 to 365 ft lbs) ft lbs M&TE Serial No.

Cal. Due Date COMMENTS

~

e t.

[

r JOB SUPERVISOR DATE i

MP 717.1 Level of Use Rev.12 General STOP THINK ACT REV EW 43 of 43 l

..m.-.

m m

1 e

Procedure or Form Cancellation Request (Sheet 1 of F) d'*

O

[Section 1: : Cancelldion Initiation

~~

~~

g Document No.: Maint. Form 717.1-1 Revision No.: 2

Title:

Target Rock Safety / Relief Valve Main Stage Maintenance and Valve Replacement l' E'"I**'

5/13/97 Initlated Hy:

Date, Reason for Cancellation:

Deleted Maint. Form 717.1-1 Rev 2. Data previously recorded on Maint. Form is now recorded on MP 717.1 Rev 12, Attachment 6.

One procedure or form cancellation per Attachment 7.

' Section di:-Cancellation' Reviews M

~

u Independent Reviewer Signature:o L

/1 Lh/

Date: -

!9'7

'1

/

i t

NOk

$ Safety Evaluation Required?

YES i

$ Environmental Review Required?

YES O NO &

S!26h7

^

Procedure Screener Signature:

[

L Date:

4 b

QA Reviewer Signature Date:

(if required):

S'ection 3i Dep~artment Hea'd o' ~ Responsible Individual ReUlew.and Approvala.fi

~

r PORC or SORC Review Requied? YES O NO O Department IIcad Signature:ld(/l,

Date: 5M/n

('

(v ii'.

Approval if required)r A 4

is Section~,4.: ~ P. ORC orJORC Review a

>rSORC Meeting No:

/-Q7-Od3 Chairperson Signature:

Approval Date: 5-Zo 47 Cancellation pc29-N Effective Date:

vl

/,

DC 1 Attachment 7 STOP '

THiNK '

ACT~

' REVIEW Rev. 5 79 of 82

,s