ML20003G491

Mechanical Snubber Test & Insp.

ML20003G491
Person / Time
Site:	Fort Saint Vrain
Issue date:	02/21/1981
From:	PUBLIC SERVICE CO. OF COLORADO
To:
Shared Package
ML20003G490	List: ML20003G489 ML20003G491
References
MP-98-2, NUDOCS 8104290663
Download: ML20003G491 (8)

Text

2 PUSLIC SERVICE COMPANY OF COLORADO Attacnnent A

.v? 98-2 gg FCET 57. VRAIN NL',Ci.~AR GENE 7ATING STATICN 73gn3 1

?cgo 1 of 6 O

C*T E: MICF.ANICAL SNL*33ER TST A'O 'NS?EC~ ION i

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$7$Cb$50 3Y WWA >~

DORC peac 4 0 0 FES 2 01c81 EF*EC7'vE 2,

REVIEW CATE #2*I - b l

! 1.0 ?tJR?CSE 1.1 Test and inspectics of =achanical pipe snubbers, FS*7 piping.

2.0 ?IS?CNSI3'LI~T 2.1 CCORDINATION AND JO3 ?I?S0??_B'CE Main:enance 2.2 INS?EC* ION Maintenance QC

. ._Si Maintenance 3.O GINI?>J i

l 3.1 FRICAC'-'ICNS 3.1.1 Use adecua:e safe:y ppecautions whi'a working in ther= ally ho: areas or when vorking in areas where cli=bing a=eng piping arrange =ents.

3.1.2 Use en:re=e care as ne: :o da= age o:her ecuip=en:

during verk progress, i.e. ins:runen: :nbing ,

iring, other snubbers, etc.

, .3 _._v.- . A. _CN. S 3.2.1 The scope of :his procedure is := cc=ple:e an inspee:icn :o deter =ine proper ins:allation, nechanical condi:icn of hardware associa:ed with 810 4 2'90hlv3

N Attachment A 3 98 9-FCRT ST. VRAIN NUCLEAR GENE 3AilNG STATICN ;scua 1 Peg 2 2 of 6 the installation. Snubber disasse=bly or repairs not addressed in this precedure.

3.2.2 LCO 4.3.10 requires that only one snubber can be inoperable or out of service at any one time during power operation for a period not to exceed 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> frc= the ti=e it was declared inoper-able or re=oved frc= service. (Hydraulic only) 3.3 CLE VIING -

3.3.1 Petroleu

based solvents are approved for ex:ernal-cleaning of snubbers and : heir associated hardware.

3.3.2 For cleaning of internal snubber parts, clean-ing solvents are restiicted to alcohol blown dry with clean ec= pressed air or nitrogen.

CAUTION: Do not allow solvent to enter internals as it will degrease the internal ball train.

3.4 HOUSEiEEPE!G 3.4.1 ANSI Zone V housekeeping recuire=ents oily rags and wipes =ust be placed in fla=e proof covered containers i==ediately af:er use in all areas.

Solvents or oil used at work sites must be in approved safety containers.

3.4.2 Co=bustable =aterials such as parr boxes, wipes, etc. , taken into the reactor building =ust be l con:ained in covered flame proof con:ainers prior to their use and 4-adia:ely placed in covered flh=e proof containers after use.

3.5 SPECIAL TOOLS REOUIRED None 3.6 REFEFIiCES l

3.6.1 Applicable Foreign Prints.

l l 3.7 ATTACEMENTS l

l 3.7.1 Inspection Data Shee:

3.8 DEVIr !CN PROCESSING 3.3.1 Material and eculp=en: deviations are to be pro-cessed on Non-Confor ance Repor:s (NCR's) in

FucsLlL dsr%VILs LVMFAN Y V r L U LURG LJ U Attachment A uw 98 9 FORT ST. VRAIN NUCLEAR GENERATING STATICN ',e~ cue. ~

Pega 3 of 6 accordance with Q-15. Deviations : this pro- j cedure (DR's) are :o be processed in accordance l vith Q-2. NCR's and DR's are :o be listed on the Maintenance Procedure Control 70= with copies of approved deviations attached to the white copy.

3.9 AS FOUND/AS LEF CONDITIONS 3.9.1 As Found and As Left conditions for both the work and tests are to be docu=ented en the Main-

~

enance Procedure Control Fo =.

3.10 CORRECTIVE ACTION 3.10.1 Out of spec conditions and corrective actions are to be processed en Plant Trouble Reports

(?'"R' s) . ?TR's are to be su==arized and listed on the Main:enance Procedure Control Fo =. ,

1 3.11 MATERIAI. AND ? ARTS  ;

3.11.1 Reew ended naterial and parts to condue: this procedure are, when applicable, identified in an a::achnent to this procedure.

3.11.2 A list of =aterials and parts with the associa:ed DC# and P.O. data are to be included on the Main-tenance Procedure Centrol ?c=.

3.12 INS?ECTICN 3.I2.1 General inspections vill be conducted in accor-i dance with Maintenance QC procedures. A copy of the Inspection Check List will 'e attached to the W S:enance Procedure Cen:rol Fo =. .

Detailed inspections are included and dccunented l in See:1cn 4.0 of this precedure.

3.12.2 Hold ?cin:

An inspec:1 n poin: in a procedure where the craf:snan has notified the Maintena.ce Quality Cen:rol Technician, who in turn nus: sign-off the inspec:icn before work shall be allowed to continue.

1

! 3.12.3 Witness Point An inspection point in a procedure where the i

craftsman has notified the Maint.enance Quality

! Centrol Technicinn, who in turn; l

\

PUBLiC ScRVICc COMPANY OF COLORADO Attachment A va 98_>

CRT ST. VRAIN NUCLEAR GENERATING STATION as:'A .{.

tag 2 4 of 6 a) =ust be presen: :o observe the actual p3.r-for=an 4 of one or = ore steps of a procedure:

or b) =ust be present to observe the actual per-for=ance of a =easure=ent of :est :o verify tha: the preceding steps, in the procedure, have been perfor=ed correc:ly; or c) =ay after co=cletion of the work, perfor an inspection of =easurement to verify tha:

the work was perfor=ed correctly.

3.13 RECORDS 3.13.1 The caster signed-off original of this procedure clo;:g with a copy of :he v.aintenance ? ocedure Con:rol Form is to be retained within the working files of :he depart =ent for a period of nor = ore than one (1) year and then transf erred :o :he FSV Record Center.

3.13.2 The original copy of the F.aintenance Procedure Control For= along M:h the attach =ents listed in See:1on 3.7 and 3.11 are to be forwarded :o the FSV Record Canter.

4.C PROCEDURE

' 4.1 PREREOUISI'"E L'D GENE?ll USTRUC'" IONS 4.1.1 Fa h :enance and QC sign-off for all steps conduct to this procedure are on the data sheet a:: ached.

1 4.1.2 Obtain the list of snubbers and locations from F.aintenance QC.

4.1.3 Prior to starting the inspection, obtain the Shif Superviscr's per=ission to p oceed.

Shif: Supervisor Date 4.1.4 Record each snubber nu=ber and S/N on data sheet.

4.2 INS?EC~ ION PROCEDURE i

i 4.2.1 For each snubber recuiring inspection, perfor=

l

he following steps and sign applicable portion of the data sheet.

FCRT ST. VRAIN NUCl.EA R GENERAilNG STA! ION Attachment A MP 98-2

~. Issue 1 Pace 5 of 6 a) Disconnect snubber piston or shaft end fron nounting.

b) Inspec: clevis eyes and pin for defects.

c) Pull back the telecopying shaft cover and inspect the snubber piston shaf: (full out position) for the following:

1) Scratch = ark of severe nature.

2) Pitted areas that vill prevent perfor-ance.

3) Dir collection.

4) Build-up of grease.

d) Verify stroke ability.

1) Manually stroke to full range of con-pression (in) and tension (out) .

NOTE: Perfom slowly to prevent lock-up.

2) Verify lock-up in both :he congression

and tension stroke directics by applica-tien of a sharp sustained load manually.

Record results on data sheet.

4.3 REINSTALI.ATICN 4.3.1 Clean linkage parts.

4.3.2 Deter =ine tha: the piston shaf: cover is functional.

43.3. Reccanect- the snubber to it's original comec-tion point. Document on da:a sheet.

l l

5.0 TEST PROCIDURI 5.1 Test requirenents are stated in Ob: gcocedure body.

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UBLIC EERMlfCE GOlufFalMY OF G9b9tM/A99 Attachment A

• 98-2 FCRT ST. VRAIN NUCLEAR GENERATING STATICN Isaus 1 )

Paga 6 of 6 6.0 ACCEPTANCE CRITERIA 6.1 The snubber can be =anually stroked from full in posi-tion to full out position.

6.2 The snubber will lockup when sharp sustained force is applied in each direction.

7.0 TOOL LIST None I

n .

Work Co=pleted /s/ Date Work =an Test Cc=pleted /s/ Date Inspection Completed /s/ Date QC I

. _ - - _ _ _ _ _ _-______________________-_-______________-_______________________________a

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