ML20140D092

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to MP 719.9, Gagging Target Rock Safety/Relief Valves
ML20140D092
Person / Time
Site: Millstone  Dominion icon.png
Issue date: 05/22/1997
From: Pernal J
NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20140D099 List:
References
MP-717.9, NUDOCS 9706100241
Download: ML20140D092 (23)
v • d • e


Text

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( ) MILLSTONE NUCLEAR POWER STATION

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MAINTENANCE PROCEDURE 1

I Gagging Target Rock Safety / Relief Valves  !

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Approval: r-l l

PORC Mtg. No: l' 9 7-C65 Date: 5' ZZ-9 '7 l

Effective Date: 6-QRCO l i

t 9706100241 970603 i PDR ADOCK 05000245 l P PDR  ;

C/ SME: J. Pernal Level of Use Generai  :

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Millstone Unit 1 Maintenance Procedure l

Gagging Target Rock Safety / Relief Valves l

l l TABLE OF CONTENTS

1. PURPOSE....................................................2 l 2. P R E R E Q U I S ITES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. P R ECAUTI O N S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. I N STR U CTI O N S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 I

4.1 Removal of Air Operator Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4.2 Installation of Pilot Gag Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 4.3 Cleaning and Inspection of Components to be Installed . . . . . . . . . 9 4.4 Removal of Pilot Gag Tool . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4.5 Installation of Air Operator Assembly . . . . . . . . . . . . . . . . . . . . . . 10

5. REVIEW AN D SIGNO FF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 O 6. R E FE R E N C ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

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7. S U M M A RY O F CH AN G ES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 ATTACHMENTS AND FORMS Attachment 1, " Main Steam Lines" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Attachment 2, " Valve Assembly" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 i

Attachment 3, " Air Operator, Manifold, and Solenoid" . . . . . . . . . . . . . . 19 Attachment 4, " Pilot Gag Tool and Installation" . . . . . . . . . . . . . . . . . . . . 20 Attachment 5, " Valve Body Insulation" . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 l

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! Level of Use MP 717.9 STOP THINK -ACT REVIEW Rev.3 General Icf21 1

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.- 1. PURPOSE

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1.1 Objective The objective of this procedure is to provide instructions for gagging the topworks assembly of the main steam safety / relief valves.

1.2 Discussion 1

The main steam safety / relief valves used in Unit 1 are Target Rock Model 7567F pilot-operated valves. This procedure is written for gagging the . i topworks assembly of this valve. The topworks for the Target Rock j safety / relief valve consists of the air operator assembly and pilot stage . )

assembly. '

The gagging activity, which maintains the pilot valve in the closed position, is necessary to prevent safety / relief valve actuation during reactor vessel hydrostatic testing.

Two different models of solenoids are installed on'the safety / relief valves: l Models 1/2-SMS-A-01 and 1/2-SMS-S-02-1 (newer model). The different solenoids have correspondingly different manifolds that connect the solenoid to the topworks.

This procedure provides instructions for gagging safety / relief valves with either model solenoid and manifold assembly installed or removed.

Instructions for removal and installation of the solenoid and manifold assemblies are in MP 717.8," Main Steam Safety Relief Valve - Solenoid Changeout (EQ)."

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MP 717.9 Level of Use ST P THINK ACT REVIEW Rev.3  ;

General 2 0f 21

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p 1.3 Applicability V  !

This procedure is usually performed on valves 1-MS-3A and  ;

1-MS-3D, although the procedure applies to all of the following local  !

ids: 1 1-MS-3A, " Main Steam Safety / Relief"A" (Target Rock / APR)-Valve" J 1-MS-3B, " Main Steam Safety / Relief "B" (Target Rock / APR)-Valve" 1-MS-3C, " Main Steam Safety / Relief"C" (Target Rock / APR)-Valve" 1-MS-3D," Main Steam Safety / Relief "D" (Target Rock / APR)-Valve" 1-MS-3E, " Main Steam Safety / Relief"E" (Target Rock / APR)-Valve" l 1-MS-3F," Main Steam Safety / Relief"F" (Target Rock / APR)-Valve" D

(V 2. PREREOUISITES 2.1 Documents 2.1.1 C MP 715C," Installation of Lockwire and Lockplates" 2.1.2 MP 717.8," Main Steam Safety Relief Valve-Solenoid ,

Changeout (EQ)"

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.

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!V Level of Use MP 717.9 ST P THINK ACT REVIEW Rev. 3 General 3 0f 21

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2.2.2 QA torque wrenches (click or dial type) with a minimum accuracy

! O._ and maximum full scale value listed in the table below for the specified torque application range.

l Specified Torque Maximum Torque Wrench Minimum Accuracy l

)- Application Range Full Scale Wlue Between (%)

23 to 35 ftalb 45 and 125 ft lb 5 .

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2.3 Tools and Consumables l

2.3.1 Tools Lockwire pliers Standard mechanic's tool kit

  • Wire cutters 2.3.2 Special Tools

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Pilot gag tool 2.3.3 Equipment

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Two 3/8-16 bolts or lifting eyebolts Rope 2.3.4 Consumables

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Approved antiseize compound such as Nuclear-Grade ,

Never Seez  !

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Approved cleaning solvent such as Polywater Hydrafoam 2020 i

. Approved O- ring lubricant such as Versilube

. Lockwire,0.031 inch diameter

. Low-lint cloths l 2.3.5 Spare Parts l

O-ring (0.693 x 0.487 x 0.103) lA iV

.. ,1 MP 717.9

! Level of Use _ . . . u . k_ Rev. 3

  • STOP" THINK .ACT' REVIEW General p y 4 r 1

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2.4. Responsibilities  !

V 2.4.1 Dual Verifier, Performance Evaluations Inspector, or designated maintenance personnel is responsible for verifying air +

- operator-to-bonnet torque. ,

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3. FRECAUTIO.N_S t 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." .
3.2 Components being disassembled must be match marked to aid in reassembly. Do not match mark delicate parts or critical mating surfaces. -

3 3.3 Approved thread lubricant and antiseize compound must be applied to all ,

threads prior to installatio .

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MP 717.9 Level of Use .

STOP THINK -ACT REVIEW Rev. 3 General 5 of 21

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, pc 4. INSTRUQ10Ei 4.1 Removal of Air Operator Assembly 4.1.1 Refer Tb Attachment 1, and DETERMINE 1ocation of valve to be gagged.

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4 NOTE i l

1. Removal of soler.oid and manifold assembly will not disturb valve  !

i setpoint c seat tightness characteristics of pilot or main discs,

2. In some cases, valve may be gagged without having to remove i

solenoid and manifold assembly. This determination should be made {

for the specific valve prior to commencing this step. Not removing '

, solenoid and manifold assembly will save a significant amount of time i

. and reduce radiation exposure. l 2 >

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. 1 4.1.2 IE necessary, REMOVE valve insulation and ACCESS solenoid

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[ and manifold assembly. '

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p C A UTION '

u Solenoid and manifold assembly (47) is an environmentally qualified

component. j s

4.1.3 IE necessary, Refer To MP 717.8, " Main Steam Safety Relief Valve-Solenoid Changeout (EO)," and REMOVE solenoid and manifold assembly, and ENSURE air and electrical connections remain connected.

4.1.4 Refer Tb Attachments 2 and 3, REMOVE three Ball-Lok pins (146) from storage position on top of air operator, and INSERT pins into designated location in bonnet (59).

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A U MP 717 9 j Level of Use ST P THi"'( AC/T REVIEW Rev.3 General

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C AUTIO N 3

The /8-16 threaded bolts in air operator assembly must not be removed.

NOTE Removal of air operator assembly will not disturb valve setpoint or seat tightness characteristics of pilot or main discs.

l I 4.1.5 REMOVE lockwire from hex head bolts (109) and mating i nuts (117). )

l l 4.1.6 REMOVE nuts (117) and bolts (109). l l

l 4.1.7 MARK and STORE bolts and nuts.

4.1.8 INSTALL two 3/8-16 threaded bolts or lifting eyebolts 180 l

apart on outside diameter of air operator assembly flange (10-inch diameter bolt circle).

C A UTIO N l Air operator assembly must be handleu with extreme care to prevent any damage.

i NOTE l

l A viewing access hole, approximately 1 inch in diameter, in hub section of l bonnet (59) aliows direct visual confirmation of lifting collar j- oisengagement.

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l 4.1.9 Refer To Attachment 3, and LIFT air operator assembly1 /8 to3/16  !

o mch ve tically.  ;

L l 4.1.10 Radially JOG air operator assembly and DISENGAGE air l cperator stem (97) from lifting collar (76).

l 4.1.11 ENSURE lifting collar (70) is disengaged, and LIFT air operator

pj assembly clear of bonnet (59).

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> 7n9 i Levei of Uso

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g STOP THINK ACT PSVIEW Rev. 3 p

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( 4.1.12 MARK and STORE air operator assembly.

4.1.13 REMOVE O-ring (124) from bonnet. l l i

4.2 Installadon of Pilot Gag Tool l 4.2.1 Refer To Attachment 4, and INSTALL pilot gag tool onto bonnet as follows: i l a. LOOSEN pilot gag toollocknut.

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C AUTIO N l l l l To prevent damage to pilot rod, pilot gag tool center stud must be backed  !

- off prior to securmg gag tool to bonnet. ,

1 l b. ENSURE pilot gag tool center stud is backed off.

l c. POSITION pilot gag tool onto bonnet.

d. INSTALL and hand TIGHTEN fasteners securing gag tool to 7 bonnet.  :
e. Finger TIGIITEN pilot gag tool center stud to pilot rod l assembly. )

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f. TIGIITEN pilot gag tool locknut.

NOTE Upon completion of the activity which necessitated gagging of this valve, continuation of this procedure may be performed.

- 4.2.2 Go To the appropriate procedure, and PERFORM the activity which necessitated gagging of this valve.

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O Level of Use MP 717.9 ST P THINK ACT ~ REVIEW Rev.3 General S of 21  !

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l 4.3 Cleaning and Inspection of Components to be Installed )

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Y CAUTION All consumables used in or on power plant components must be controlled in accordance with CC 1," Control of Chemical Consumable Products."

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4.3.1 Using approved cleaning solvent and cloth, CLEAN all l components to be installed.

NOTE Structural defects and damage include breakage, cracks, deformation, I distortion, corrosion, pitting, scoring, scratches, erosion, galling, and l mdications of misalignment.

4.3.2 Visually INSPECT components to be installed for wear and s*ructural defects, and damage.

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MP 717.9 i Level of Use ST P THINK ACT REVIEW Rev.3 Gened 9 0f 21 l

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1 . l f- 4.4 Removal of Pilot Gag Tool i 4.4.1 Refer To Attachment 4, LOOSEN pilot gag tool locknut, and BACK OFF pilot gag tool center stud. 1 l 4.4.2 REMOVE fasteners securing pilot gag tool to bonnet.

4.4.3 REMOVE pilot gag tool from bonnet.

l 4.5 Installation of Air Operator Assembly CAUTION 0--ring (124) must be handled carefully during installation to prevent losmg it.

, 4.5.1 Refer To Attachment 2, and using an approved 0-ring lubricant, '

l LUBRICATE new O-ring (124).

4.5.2 INSERT new O-ring into bonnet (59).

4.5.3 LIFT air operator assembly above bonnet, and, using Ball-Lok pin holes in air operator cap, ENSURE correct alignment of air operator and bonnet air passage porting. .

4.5.4 Slowly LOWER air operator assembly into bonnet.

4.5.5 Radially JOG air operator assembly to engage stem (97) and lifting collar (76).

I 4.5.6 LOWER and SEAT air operator assembly onto bonnet. i 4.5.7 REMOVE two threaded bolts or lifting eyes from air operator l flange.

l 4.5.8 IE solenoid and manifold assembly was removed, Refer To MP 717.8," Main Steam Safety Relief Valve-Solenoid Changeout (EO)," and INSTALL solenoid and manifold assembly.

l l 4.5.9 INSTALL and finger TIGIITEN nuts (117) and bolts (109) l securing air operator to bonnet. 1 i

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[ Level of Use ST P TH'NK 'ACT REVIEW Rev. 3 Gened 10 of 21 t

t 4.5.10 REMOVE Ball-Lok pins (146) from designated location in lq bonnet and INSERT Ball-Lok pins into storage position in top of air operator.

NOTE Solenoid 1/2-SMS-S-02-01 (newer model) and manifold assembly is secured by two of the eight bolts which also secure the air operator. These bolts are torqued 25 ftelbs and the other six are torqued to 30 ftelbs.

l 4.5.11 REQUEST dual verification, and PERFORM applicable action:

a. E solenoid 1/2-SMS-S-02-01 (newer model) and l manifold assembly is installed, using criss-eross pattern, i evenly TORQUE fasteners securing air operator to bonnet as I follows:

. ENSURE two bolts (109) and nuts (117) securing ,

solenoid and manifold assembly are torqued to

[ 25 ftelbs (23 to 27 ftelbs).

! = TORQUE remaimng six bolts (109) and nuts (117) to D 30 ftelbs (25 to 35 ftelbs).

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b. E solenoid 1/2-SMS-A-01 (older model) and manifold assembly is installed, using criss-cross pattern, evenly l

TORQUE bolts (109) and nuts (117) securing air operator to bonnet to 30 ftelbs (25 to 35 ftelbs).

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I c. RECORD the following on AWO:

Applied torque values

l . Calibration due date 4.5.12 Refer To C MP 715C," Installation of Lockwire and Lockplates,"

and using lockwire, SECURE bolts (109) and nuts (117).

l O MP 717.9 l

j Level of Use General sw w m es Rew 3 11 of 21 l

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i l CAUTION l

Insulation must not be installed above bonnet lower flange level.  !

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4.5.13 Refer To Attachment 5, and,IE necessary, APPLY insulation to l valve body and ENSURE the following:

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No insulation gaps exist between valve body and main steam piping. 1

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No insulation is installed above bonnet lower flange level.

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O Level of Use hip 717.9 STOP THINK ACT REVIEW Rev. 3 I .

1 General 12 cf 21

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, . 5. REVIEW A.ND SIGN-OFF l '

5.1 The review and sign-off of the AWO satisfy the revbw and sign-off of  :

this procedure.

! 6. REFERENCES 6.1- Technical Specifications l 6.1.1 Sections 3.6.E.1 Amend 90 (12/29/95) and 3.6.B.1.b Amend 90 (12/29/95)" Primary Safety Boundary: Safety and Relief Valves" 6.2 NUSCo Accident Prevention Manual 6.3 Drawings 6.3.1 NUSCo Drawing 25202-26012, sheet 2 " Piping and  !

Instrumentation Diagram Main Steam System" 6.3.2 NUSCo Drawing 25202-26049, sheet 556 " Millstone Nuclear Pwr. Sta. Unit 1 Standardized Instrument List" 6.3.3 NUSCo Drawing 25202-29121 sheet 42 " Outline Drawing for p 1 - M S -3A,1 - MS - 3 B,1 -M S -3C,1 - M S -3 D,1 - M S -3 E, i

'd 1-MS-3F, Model Valve 7567F 6 X 10 Relief Valve"

63.4 NUSCo Drawing 25202-29121 sheet 43 " Valve 1-MS-3A, 1 - M S - 3 B, 1 - M S - 3 C, 1 - M S - 3 D, 1 - M S - 3 E, 1 - M S - 3 F, l

Model 7567F 6 X 10 Relief Valve" 6.3.5 NUSCo Drawing 25202-29121, sheet 48A "Three Way Valve l Solenoid Operated" 6.3.6 NUSCo Drawing 25202-29121 sheet 48B "Three Way Valve Solenoid Operated" 6.3.7 NUSCo Drawing 25202-29121 sheet 48C "Three Way Valve Solenoid Operated"

( 6.4 Vendor Manuals 6.4.1 25202-726-001A, Target Rock Corp," Safety and Relief Valve Model 7567F Technical Manual"

O Level of Use MP 717.9 i

ST P TH!NK ACT REVIEW Rev. 3 General 13 of 21 i

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6.5 Adminiurative Procedures f

i 6.5.1 CC 1," Control of Chemical Consumable Products" 6.5.2 WC 8," Control and Calibration of Measuring and Test Equipment" l l

6.6 Maintenance Procedures ,

6.6.1 C MP 715C,"Inctallation of Lockwire and Lockplates" l

6.6.2 MP 717.8," Main Steam Safety Relief Valve - Solenoid l Changeout (EO)"  ;

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l 6.7 Other Documents 6.7.1 DCN DM1-S-0458-95," Main Steam Relief Valve 1-MS-3F  :

Solenoid Valve Replacement" l

7. SUMM ARY OF CHANGES L- 7.1 Revision 3 modifies the procedure to include instructions for newer model y solenoid and manifold assembly.  ;

I i 7.2 Added references to MP 717.8 for removal and installation of solenoid '

l and manifold assembly. Deleted portions of procedure relating to

! installation and removal of solenoid assembly.

l l 7.3 Minor editorial and reference changes were made.

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GI MP 717.9 Level of Use srcP THINK ' ACT' REVIEW Rev.3 General 14 of 21 l

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. Attachment 1  !

Main Steam Lines (Sheet 1 of 1)  ;

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Personnel Airlock Drywell South j w \

Ladder i i

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Equipment Hatch i

l 1-MS-3F 1 - MS--3A

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Setpoint 1125 psig Reactor Setpoint i

l 1095 psig )

l 1-MS-3D 1-MS-3E Setpoint i Setpoint 1110 psig l 1125 psig -

1 i 1 -MS-3C 1-MS-3B l Setpoint _ Setpoint  ;

j 1125 psig -

1125 psig 1 l _

l Ladder

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D C B A A

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MP 717.9 Level of USe STOP THINK ACT REVIEW Rev. 3 General 15 of 21

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,. Attachment 2

,- Valve Assembly (Sheet 1 of 3)

Air Operator Assembly._ _

i c, Solenoid and Manifold Assembly I

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_ Ball-Loc Pins h

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[ Base Assembly

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'*h n r I sToe mm ACT RWS 21

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Valve Assembly I (Sheet 2 of 3) l

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\ 47 Solenoid and Manifold Assembly mwx*v

// / 59 Bonnet p _., 76 Lifting Collar

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97 109 Air Operator Stem Hex Head Bolt1 /2 - 13 x 33/4" 111 Hex Head Bolt3 /s - 16 x 15 /j" 117 Hex Nut1 /2-13 x UNC-2

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124 O-Ring (0.693 OD x 0.487 x 0.103) 146 Ball-Lok Pin MP 717.9 i

Level of Use gggggg STOP THINK ' ACT REVIEW Rev. 3 17 of 21 i

Attachment 2 Valve Assembly (mg (Sheet 3 of 3)

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MP 717.9 Level of Use Geneca; STOP THINK ACT REVIEW Rev. 3 18 cf 21

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- Attachment 3 l Air Operator, Manifold, and Solenoid -

(Sheet 1 of 1)

Air Operator Assembly o (hMg- -

ve p NOTE

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/ Air o rator assembi

\ I may removed wit ut h solenoid and manifold assembly.

Solenoid and Manifold Assembly O MP 717.9 Level of Use . .

Rev.3

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ST P THINK ACT REVIEW General 19 of 21

- 1 Atttchment 4  !

l Pilot Gag Tool and Installation (r g) (Sheet 1 of 1)

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Pilot Gag Tool T-20082-1 \ l v bg Pilot Gag Tool 5 Locknut -

^ %' Y 'n # '# %F u) s + xx R

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U Pilot Gag Tool N g*

g 'W 3 s Center Stud N h '

Bonnet N ll Pilot Rod ll s g-g

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p-q Ball-Lok hk l NNNNNNN "

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" LNNNNNNN hM[ I O MP 717.9 Level of Use ST P THINK ACT REVIEW Rev. 3 General 20 of 21

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Attachinent 5 l Valve Body Insulation l (Sheet 1 of 1)

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! CAUTION l No insulation above ,

I bonnet lower flange level \

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g i i insulation

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REVIEW Rev.3

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