ML20137F189

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Rev 0 to Check Valve Reliability Analysis Insp Criteria
ML20137F189
Person / Time
Site: Millstone Dominion icon.png
Issue date: 06/30/1990
From:
GILBERT/COMMONWEALTH, INC. (FORMERLY GILBERT ASSOCIAT
To:
Shared Package
ML20137F155 List:
References
NUDOCS 9704010007
Download: ML20137F189 (13)
v • d • e


Text

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MILLSTONE NUCLEAR POWER STATION - UNIT NORTHEAST UTILITIES SERVICE COMPANY i

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! CHECK VALVE RELIABILITY ANALYSIS INSPECTION CRITERIA i i

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i "World Class Valve Engineering" 1

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!O / Gilbert / Commonwealth,Inc. '

engineers and consultants . Reading, Pennsylvania P

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O CHECK VALVEINSPECTION CRITERIA

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MILLSTONE UNITTWO NORTHEAST UTILITIES i

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PREPARED BY GILBERT / COMMONWEALTH,INC O

Revision: Date:

Prepared by: Date:

Reviewed by: --

Date:

Approved by: Date:

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'. RECORD OF REVISIONS i 1 ,

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Lld1E SEC170NS REWSED I 0 June,1990

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O israoouction i

i These Criteria have been prepared for the inspection of check l valves for the Millstone Unit 2 Program that has been j developed in response to INPO's SOER 86-3. Valve i

' Illustrations, General Instructions, and Guidelines to Correctiv: Action are included for use with these Criteria. An

! Index provides direction on the specific documents to be used with each of the criteria.

4 Additional reference material and background for the program '

i can be obtained iorm the " Millstone Unit 2 Check Valve l Design Application Review." \

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i TABLEOFCONTENIS 3 SECTION 1.0 Check Vahe Index to lasp dian Criteria i j SECTION 2.0 Swing Check Valve Inspectica Criteria  ;

i SECT 10N 3.0 Tilting Disc Check Valve Inspection Criteria SECTION 4.0 LEt Check ValveInspection Criteria SECTION 5.0 Dual Plate Check Vahe laspection Criteria

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SECTION 6.0 Illustrations (1 through 20) t 1

2 SECT 10N 7.0 GeneralInstructions j Guidelines to Corrective Action 1

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CHECK VALVE INDEX TO INSPECTION CRITERIA  !

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,V O This is an Alphanumeric Index to all Valves includedin the Inspection Program. The matching criteria and l illustrations needed forperforming the inspections are i listedbelow.

! Valve No. Illustration Criteria l

2-CH-118 9 swing check 2-CH 154 9 swing check i 2-CH-155 9 swing check i 2-CH-177 9 swing check 2-CH-190 9 swing check j

2-CH-328 8 lift check

! 2-CH-331 8 lift check 2-CH-334 8 lift check i

' 2-CH-431 12 lift check 2-CH-432 8 lift check

2-CH 433 8 lift check 4

2-CS-02A 10 swing check 2-CS42B 10 swing check 2-CS45A 10 swing check 2-CS-05B 10 swing check 2-CS-06A 8 lift check 2-CS-068 8 lift check 2-CS-14A 10 swing check i 2-CS-14B 10 swing check 2-CS-15A 10 swing check 2-CS-15B 10 swing check 2-DG-29A *

  • 2-DG-298 * * '

2-DG-29C *

  • 2-DG-29D *
  • 2-DG-35A 18 lift check 2-DG-35B 18 lift check 2-DG-35C 18 lift check i

2-DG-35D 18 lift check 2-DG-49A * * '

2-DG-49B *

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  • WNDOR PRINTUNAVAll.ABLE. VALVE TYPEUNKNOWN.

THEREFORE, AT TIME OFINSPECTION DETERMINE APPROPRIATE CRITERIA ANO ILLUSTRATION TO USE.

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CHECK VALVE INDEX TO INSPECTION CRITERIA (cont'd)

This is an Alphanumeric inder to all Valves included in the inspection Program. The matching criteria and Illustrations needed forpedorming the inspections are IIstedbelow.

Valve No. Illustratfort Criteria 2-FW 01A 3 ti disc 4

2-FW-01B 3 ti disc

! 2-FW 05A  !

5 check '

2-FW-058 5 s check 4

2-FW 07 2 disc 2-FW 08A 2 ti disc

! 2-FW-08B 2 disc 2-FW-12A 6 swmg check i 2-FW-12B 6 swmg check 2-FW-32A 18 lift check i 2-FW-32B 18 lift check 2-FW-33 18 lift check i

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2-MS 01A 13 swing check 2-MS-01B 13 swmg check 2-MS-04A 4 swmg check i

2-MS 04B 4 swing check

{ j 2-MS-64A 14 swng check  ;

2-MS-648 14 sweg check l 1

2-RB42A 2 tilti disc i 2-RB-02B 2 tilti disc i

  • 2-RB-02C 2 ti disc 2-RB-182A 1 swing check 2-RB-182B 1 swing check 2-RB-182C 1 swing check l

i S-SI 008 7 swing check  :

2-SI 009 8 lift check 2 Sl410 8 lift check i

2 SI-011 8 lift check l 2-SI 012 8 lift check 2-SI-113  !

15 lift check '

2-St 114 9 swing check 2-SI-123 15 lift check 2 SI 124 9 swing check 2-SI-133 15 lift check 2 SI 134 9- swing check 2-SI 143 15 lift check 2-SI-144 9 swing check 2-SI-215 16 swing check 2-SI-217 16 swing check 2-SI-225 O 2-Si-227 2-SI 235 16 1e 16 swing check

=~iaocheck swing check 2 o(3

d CHECK VALVE INDEX TO INSPECTION CRITERIA (cont'd)

', O rhisis an anumeric index to aii vaives inciuded in theinspec Program. The matching criteria and ,

illustrations needed forperforming the inspections are listed beiow.

Valve No. Illustration Criteria 2-SI 237 16 swing check 1

2-SI-245 16 synng check 4

2-SI-247 16 swing check 2 SI-401 17 swing check 2-SI-405 9 swing check i 2-SI-410 17 swing check 2-SI-414 9 swing check 2-SI-422 8 lift check 2-SI-424 8 lift check 2-SI-426 8 lift check '

2-SI-427 9 swing check '

2-SI-434 17 swing check 2-SI-446 17 swing check 2-SI-448 8 lift check 2-SI-451 8 lift check 2-SI-706A 11 swing check 2-SI-7068 11 swing check 2-SI-706C O 2-St-706D 11 11 swing check swing check 2-SW-01A 19 dualcheck 2-SW-01B 19 dual check 2-SW-01C 19 dualcheck 2-SW-11 A 19 dualcheck 2-SW 118 19 dualcheck 2-SW-13A 20 dualcheck 2 SW-13B 20 dual check (END LIST)

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O O O THE CHECK VALVE MAINTENANCE PROGRAM i

MILLSTONE UNIT 2 '

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SWING CHECK VALVE INSPECTION CRITERIA  !

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o O O SWING CHECK VALVE INSPEcrION CRITERIA VALVE NO.

MILESTONE UNIT 2 CHECK VALVE MAINTENANCE PROGRAM DATE OFINSPECTION PAGEIOF4 INSPECTION METHOD

1. REVIEW GENERAL INSTRUCTIONS.

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NOTE ANY OBVIOUS PROBLEMS %TTH EXTERIOR OF VALVE.

(REMOVAL OF INSUIATION OR ADJACENT COMPONENTS NOT REOUIRED) Performed by:

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MANUALLY CYCLE AITER BONNET REMOVAL TO IDEffrIFY I ANY OPERABILITY PROBLEMS SUCH AS STICKING, MISALIGNMENT, OR BINDING. ReviewedBy:

4 DISASSEMBLE VALVE AND INSPECT IBrrERNALS NOTING ESPECIALLY THE AREAS OF INTEREST NOTED BELOW.

INSPECTION IESULTS  !

1. ANSWER YES, NO, OR NOT APPLICABLE FOR EACH ITEM .

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2. FOR ITEMS ANSWERED YES, PROVIDE DETAILS IN COMME?frS SECTION '

AREA OF IPrIEREST INSPECHON CONCEltN Y/N/NA COMMEPfrS A. Seat -

erosion / cavitation, particularly l on lower quadrants Details offnspection impact damage due to slamming, Iluttering ,

scoring due to misalignment corrosion at dissimilar metal joints B. Disc -

erosion / cavitation, particularly lower quadrants.

soft seat damage

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SWING CHECK VALVE INSPECTION CRTIERIA VALVE NO.

MILLSTONE UNIT 2 CHECK VALVE MAINTENANCE PROGRAM DATE OFINSFECI10N FAGE1OF4 AREA OFINTEREST INSFECDON CONCERN Y/N/NA COMMEM5 D. (cont'd) -

corrosion at dissimilar metaljoints are anti-rotation devices provided (lugs or pins)

C. Disc to -

wear / loosening due to slamming, torsional Disc arm stress due to turbulence Connection wear indicating disc rotation (note condaion of anti-rotation lugs if applicable) elongation or out-of-round conditions in hole of disc arm for disc stud i

D. Disc -

wear and/or impact damage due to Assembly & disc or disc stud chattering against Backstop bodycavity Area bending / cracking of disc arm E. Hinge Pin -

excessive lateral movement in disc assembly and Disc Arm Connection -

wear / corrosion of hinge pin OD and bushingID excessive clearance / wear at shaft-key-disc arm connection hinge pin bending / distortion excessive corrosion (or fatigue)in retaining block studs loose retaining blocks or any slight movement in block to bodyinterface

O O O SWING CHECK VALVE INSPELTION CRITERIA VALVE NO.

MILL 5 TONE UNIT 2 CHECK YALVE MAINTENANCE PROGRAM DNIE OF ENSFECnON FAGE3OF4 AREA OFINTEREST IN5FECT10N CONCERN Y/N/NA COMMENI3 F. External -

cracking of hinge pin at connection to Arm or external arm Connection 13 Operator -

adjustable counterweights loose or mispositioned excessive clearance / wear at the shaft-key-operator arm connecten cracking of key or actuator arm connecten to hinge pin G. Closure -

incorrect assembly / orientation Assisting Springs -

nicks or pits due to corrosion or turbulence stress posion cracking overstress H. Hinge Pin to -

cracking at integral connections to body Body Connection -

evidence ofleakage at body penetration binding /scorlag/ corrosion of shaft designs incorporating packing which could contribute to packing leakage

  • I. Iacking -

disc to disc arm connection locking device Devices (i.e., not locking pin) disc arm to hinge pin locking devices (i.e., keyways, set screws) ,

adjustabic backstop locking devices ,

hinge assembly mounting to bodyor bonnet i

(i.e., retaining block stud locking) l

I O O O 4

SWING CHECK VALVE INSPECTION CRI'IERIA VALVE NO.

i MILLSTONE UNIT 2 CHECK VALVE MAINTENANCE PROGRAM DATE OF ENSFECITON PAGE4OF4 AREA OFIfffEREST INSPECIlON CONCERN Y/N/NA COBOtEfft3 J. Missing Parts -

anyinternal parts missing evidence of cause: failure, never installed, etc.

K. Proper -

as-found assembly not in agreement with Assembly vendor drawing or good practice L Interiorof -

erosion / corrosion Vr.lve Body unusual wear dirt / debris in valve

, 1YPICAL SWING CHECK VALVE CONFIGURATION DISCASSEMBLY- nis w..Mj inchedes ne disc, disc ame, dhe stud, andsnod nut.

DISC TO DISCARM CONNECTTON- TMs iM leems Rhr manfeennon Arveces, disc, disc ame, disc sand, and E:sc send nut. Dis conneenon ispart ofne Disc

, HINGE PIN TO DISCARM CONNECTION- Dis connecnon inchedes the hinge AssemNy.

pin as well as ne Disc AssemNy. 1his can inchede inems Eke retaining blocks range m en BodyConnecnon and retaining Nock studs which support the disc assemNy and often hold ne 1 hingepin in place in some nahe designs. When keys are usedin the hingepin

  • to secure the,-n to the disc ame they are conssderedpart of this connection. 4mmy K w
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_s .- use ersee ser HINGE PIN TO BODYCONNECTION- Typically, areas ofhingepin; aa -.,

packing or stuffing bours is incheded here. Additionalconnections to body mia UW'

  • bushings and other body supports to the hingepin are inchaded here. ~~T

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_gj f snec snod EXTERNAL ARM OR CONNECTION TO OPERATOR - Such erar een W keys used in the hingephe to secure nepin so exermalamas or opennors, ne f" counternenght ames nia.;.% and weights as neR. Critical no commerrweght ames are angne of arm and locanon of weight on arms. ne everaeorin inettis not a part ofhis inspection and only ne connernon to hingepin and/or disc assemNy is relenant her.

Drec Disc 3RntNut LOCKING DEVICES - Specifics are twpicallockmg and retentum mechanisms and proper technique is anneleNe in EPRPs Report NP-3479 "Apphcanon Guidehnesfor Check Valves *.

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