ML19332D237

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Rev 1 to Svc Water Sys Piping Insp/Repair Program Procedure 1309.014, Svc Water Piping Thickness Evaluation.
ML19332D237
Person / Time
Site: Arkansas Nuclear  Entergy icon.png
Issue date: 11/21/1989
From: Jones G
ARKANSAS POWER & LIGHT CO.
To:
Shared Package
ML19332D236 List:
References
1309.014, NUDOCS 8911300193
Download: ML19332D237 (29)
v • d • e


Text

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L 2 Arkonsos Nuclear One TL8MM0F CHANSES AND REVISIONS lpeanme' 1000. 08 A ENGINEE g G M [ 9' esv. EP 34 SERVICE WATER PIPING i

THICKNESS EVALUATION 1309.014 REV. 1 g /  !

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h SERVICES PIPING THICKNESS EVAllATION 1309.014 l PMS 1 of 2B '

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1 1.0 PURPOSE ,

l 1.1 Establish responsibilities for performance of the examination and analysis of results for monitoring and trending pipe wall thickness changes in t the service water system.

1.2 Define parameters used in determining repair / replacement requirements for j a deficient ASME Section .III class 3 component found as a result of this  ;

procedure or by other means. '

t 2.0 SCOPE This procedure outlines the authority, responsibility and duties associated  ;

with ultrasonic thickness mapping of the Service Water and Auxiliary Cooling  !

Water Systems for both Unit I and Unit 2. The data obtained will be used to determine acceptability of piping wall thickness and to trend ge')eral pipe wall reduction and localized pipe wall pitting. The acceptance criteria can also be up lized to evaluate the pressure and structural integrity of other ASME Section III Class 3 low pressure (5200 psig) components.

3.0 REFERENCES

3.1 Procedure 1000.061 (Control of Site NDE) 3.2 ASME Section III, Subsection NC and ND, (Class 2 and 3 piping), i 1986 Edition. -

3.3 ASME Section V, "Hondestructive Examination", 1986 Edition.

l 3.4 ASNT SNT-TCIA, " Recommended Practice", August, 1980 Edition, l- 3.5 ASME Section XI, Ruler for Inservice Inspection of Nuclear Power Plant l_ Components, Div.1,1980 Edition. Winter 1981 Addenda. ,

t 3.6 EPRI Report No. SIR-87-010, Acceptance Guideline for Structural Evaluation of Erosion / Corrosion Thinning in Carbon Steel Piping 3.7 APLO18.0100: Technical Report, Service Water System Piping Corrosion Analysis Methodology for ANO - 1&2 by NUTECH Engineers, Inc.

4.0- DEFINITIONS I 4.1 Certification - The act of determining, verifying and attesting in writing to the qualifications of personnel processes.

4.2 Examination - Denotes the performance of all visual observation and l- nondestructive testing, such as radiography, ultrasonic, eddy current, liquid penetrant and magnetic particle methods.

. . . _.~ . _ _ . . _ . _

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Y IN bib YIVYC T P SERVICES PIPING THICKNESS EVALUATION 1309.014

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Pata 2 of 2B ARKANSAS NUCLEAR ONE -I == 09mie9 cuanses NY 4.3 . Qualification - (Personnel) - The characteristics or abilities gained through education, training or experience, as measured against established requirements, such as standards or tests, that qualify an individual to perform a required function.

4.4 Deficient component - A component identified by examination to have an unacceptable wall thickness.

4.5 Location Number - Unique nuurical identification assigned to the s inspection site and resultant data tapes. Appendix A provides a cross reference of Location Numbers to isometric drawings.

5.0 RESPONSIBILITIES & AUTHORITIES 5.1 Plant Engineering Superintendent Provides final review and approval of reports prepared to meet the requirements of this procedure. Also, provide review and approval of all changes to the procedure.

5.2 Mechanical Engineering Supervisor Ensure that requirements called for in this procedure have been met. l Appoint an individual to serve as the contract coordinator. Review and  !

approve reports prepared to meet the requirements of this procedure and review and approve all changes to the procedure.

5.3 contract-coordinator 5.3.1 Coordinate the implementation of this procedure.

5.3.2 Prepare revisions to the procedure as required. I 5.3.3 Ensure reports to document inspection results are issued in a timely manner.

5.3.4 Direct contractor in the performance of this procedure.

5.3.5 Ensure training and station policy requirements are met by '

contractor personnel.

5.3.6 Identify specific locations to be examined, and maintain drawings indicating locations of examined areas.

5.3.7 Prioritize inspection locations in a logical, cost efficient inspection sequente. ,

5.3.8 Initiate job requests to identify scope of work, f

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5.3.9 Communicate with WCC Planning and Scheduling to ensure proper craft support is provided to erect scaffolding, remove insulation, buff pipe, provide power & lighting, etc.

5.3.10 _ Notify QC prior to work being started.

5.3.11 Participate in the determination of the method of repair or replacement for piping found to have unacceptable pipe wall -;

thickness. Initiate PEARS and EARS, if necessary.

5.3.12 Analyze test data to determine locations where measured pipe wall thickness is unacceptable, predict future replacement  !

requirements and determine approximate corrosion rates, i

5.3.13 Ensure that personnel performing ultrasonic examination are qualified by the 1stest and approved edition of ASNT SNT-TC-1A. '

5.4 contractor ,

5.4.3 Provide necessary equipment, consumebles and personnel to perform the pipe wall thickness measurements at designated  ;

locations.

5.4.2 Provide wall thickness inspection data to the contract coordinator for evaluation. '

5.4.3 Certify all personnel performing inspections to the latest approved edition of ASNT SNT-TC-1A.

5.4.4 Provide a final report summarizing inspection findings, and including inspection data, wall thickness at the deepest pit at each inspection location and average wall thickness at each  :

inspection location.

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5.4.5 Comply with the AP&L QA program for all work done on site,

! except for Control of H&TE and Inspection procedures which shall be governed by the contractors QA program.

5.4.6 Comply with the contractors QA program for all work performed.

6.0 INSTRUCTIONS l

6.1 Continuous trending of selected inspection locations will be maintained by sampling the same locations at least once every three years. These .

locations are identified in Attaenment I as Category 1.

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J 6.2 Additional inspection locations will be selected by the coordinator. 5 Inspection' locations with average wall thickness less than 87.5% of the '

nominal wall thickness designed or less than the designed minimum wall thickness at the deepest pit shall be reexamined at the same frequency as Category 1 inspection locations.

6.3 The coordinator will permanently identify the inspection locations on '

the piping isometries showing locations and inspection location number. ,

6.4 Minimum and nominal wall thickness shall be determined and listed on Attachment I for each inspection location prior to performing the examination.

6.5 Job Reque;:t, drawings and planning support communications shall be -

provided to the WCC to ensure adequate job planning. ,

6.6 Quality Engineering shall be notified prior to work being started.

Person Notified Notified By Date Time >

6.7 . Certification review reports have been provided to QC per procedure ,

1000.061.  ;

Coordinator Date .

6.8 The examination shall be performed in accordance with Attachment III & IV and procedure 1000.061.

6.9 The inspection data including wall thickness at the deepest pit and average wall thickness will be provided to the coordinator upon the completion of the inspection at each location.

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6.10 The detail inspection data vill be provided to the coordinator upon request in order to perform more rigorous analysis of the data when ,

deepest pit and average wall thicknesses are insufficient to determine acceptability.

i- 6.11 Final inspection reports are to be kept of examination results.,

6.12 List all PEARS, EARS, Condition Report and new or revised calculations ,

evaluating. examination results which were initiated in the performance l=

'of this procedure ,

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ARKANSAS NUCLEAR ONE ==== 2 cummet matt 09/2u8, L 7.0 ACCEPTANCE CRITERIA 7.1 Discontinuities revealed by the NDE method of this procedure, shall be evaluated in accordance with ASME Section III and ASME Section XI.

7.2 Acceptability of examination results for each inspection location will be determined in accordance with Attachment II and the acceptance method or document will be listed on Attachment I. A condition report will be generated to document the failure to qualify any inspection locations to the initial screening criteria.

7.3 If an inspection location cannot be qualified to the applicable code requirements then a repair or replacement sufficient to bring the component in compliance with code requirements should be completed.

If such a repair cannot be accomplished without limiting plant operation, and an engineering evaluation has been completed and determined that a temporary repair is sufficient to maintain the component operable until the next scheduled refueling outage, then a " temporary" repair which is not in accordance with code requirements is acceptable. All repairs not in compliance with code shall be brought into compliance with code or replaced prior to heatup following the next scheduled refueling outage.

7.4 All examination results are acceptable or appropriate repair / replacements have been completed.

YES/NO Signature Circle Dne Date 8.0 ATTACHMENTS 8.1 Attachment I - Inspection location cross reference listing identifying inspection location #, drawing #, category and minimum wall requirements.

8.2 Attachment II - Acceptability Determination of Examination Results.

- 8.3 Attachment III - DNV-UT-A-1.01 (Rev. 0) " Automated Straight Beam Ultrasonic Examination of Piping" 8.4 Attachment IV - DNV-UT-M-1.01 (Rev. 0) " Manual Ultrasonic Thickness Measurement of Ferritic Steel and Austensitic Steel."

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gggCTION: PLAN TITLE:

. SERVICES PIPING THICKNESS EVALUATION- 1309.014

  • 7 PASt' 9 of 28 ARKANSAS NUCLEAR ONE aevisioa 1 are 09/27/89 CHANGE MTS ATTACHMENT II ACCEPTABILITY DETERMINATION OF EXAMINATION RESULTS ficia the average wall thickness and the wall thickness at the deepest pit must be

- m.ceptable. This is determined utilizing Method 1, Initial Screening. Results of applying Method 1, Initial Screening, shall be indicated on Attachment I.in the column hea M " INITIAL SCREEN' with a "Y" for acceptable and an "N" for unecceptable.

When determining t,yg, the profile of the wall thickness must be examined. If there is a preferential concentration of pits which results in an area with an average wall thickness significantly less than t,yg, then either the thickness used to apply'

. the initial screening criteria should be based upon the average thickness of this. area-of preferential pitting, or detail analysis is required.

- If initial screening is' unacceptable or detailed analysis is required due to preferential pitting a condition report shall be generated. Recalculation of stresses shall be documented with amending calculations and recorded in the calculation log. Repair-requirements and engineering operability evaluations

- of " temporary" no.4-code repairs shall be directed by condition report action items. .

If it is determined that the thinned pipe wall is acceptable and will not be replaced for an extended period,-then the condition report should be closed, otherwise an action should be assigned to delete the amending calculation i after. appropriate repairs or replacements are' completed. The qualifying or l.' repairing document should be referenced on' Attachment I in the column headed

" Qual.-Document".

Methods 2 or.3 as detailed below may be utilized to qualify wall thickness '

which fail to meet initial screening criteria. Method 2 is used to evaluate structural integrity'when averrge wall thickness is less than 0.875 t,yg.

Method 3 is used to evaluate pitting areas when the remaining wall thickness

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at-the pit location is less than t min' t

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, s . ATTACHMENT II (CONTINUED) 3 4

' ACCEPTABILITY DETERMINATION OF EXAMINATION RESULTS j

, Method 1,' Initial Screening-

.Iftfyg h 0.875 t. nom,1thentyyg is' acceptable <

/ If t pit htman, then tpit is acceptable J where; {

t,yg=averagewallthicknessmeasured t

pf{=.wallthicknessmeasuredatthedeepestpit ,

t. g .=, design nominal'wc11 thickness

! min.=[designminimumwall' thickness

. Calculation of. ..

. The design minimum wall' thickness.t shall be determined using the ASME min Section'III Class 3 criteria, ND-3641.1, equation (3). .

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zin psi. . From ASME-I-7.0 or I-8.0. Use Code of Record or value

!M1 from' Qualification of record.

D' . E-=~ joint efficiency from Table ND-3613.4-1 or ND-3613.5 56;

.Y = coefficient equal to .4 unless Do/t then- y = d .

min where d = inside diameter

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.AC= corrosion.allowa'nce. Equal to instrument error for measurement tof wall' thickness plus appropriate corrosion rates from previous historial data.

tDetermination of'.875 factor for t The manufacturers tolerance for the pipe used in the SW/ACH system is -12.5% of Jnominal wall. (Reference SA524 and SA530). Therefore the screening criteria .

. 7 for acceptance of pipe average wall thickness is 87.5% of nominal wall. For Jother systems', the; applicable ASME material specification should be reviewed.  :

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t ARKANSAS NUCLEAR ONE h2 Ct4Amet DATE a m /89 Method 2, Acceptability of Average Wall Thicknesses Below o.875 t Reduced wall thicknesses may be analyzed to determine a new. calculated stress ,

value. This.is done by multiplying the existing maximum stresses by a ratio of the "as measured" section modulus to the "as analyzed" section modulus. This will  !

be conservative in that the stresses due to the pressure term of the stress

- equation will be increased by application of this ratio, as well as stresses due to moments. This new calculated stress value can then be compared to the +

allowable' stress value as listed on the qualification of record.

If there is a' preferential concentration of pits in a single area of the pipe which results in an area with an average wall thickness significantly less than t,yg .then either t,yg should be based upon the average thickness of this area of preferential pitting or a stress intensification factor should also be utilized in recalculating the maximum stresses. The stress intensification

. factor should be based upon an unreinforced fabricated tee with dimensions representing the thinned area and with t,yg based upon the remaining pipe wall circumference.

The equations are as.follows:

3 new 3a- ' old Z

m S

new I 6 allowable (A eptance criteria) l-where:

S =: recalculated maximum stress new Z. = as measured section modulus = m r2 t, and r is the nominal mean radius Z, = as analyzed section modulus = m r2 t nom-E i =. stress intensification factor. Only used if there is preferential pitting L

and based upon the SIF for an unreinforced fabricated tee S

old

= previ us maximum stress from stress report for the appropriate pipe section. The stresses for deadweight, operating basis earthquake, design basis earthquake and thermal expansion-should all be addressed.

S- = allowable stress as identified in the code of record or qualification allowable

-of record. This should be evaluated for deadweight and thermal expansion for all piping and for operating basis and design basis earthquake as applicable.

. J' ggget  :.

ggp wim.t: ==  :

h SERVICES-- PIPING THICKNESS EVALUATION 1309.014 'I PAtt 12 of 28

{ ARKANSAS NUCLEAR ONE -1 aare 09/2ne, '

CHAust tatt Method 3, Acceptance of Pit Wall Thicknesses Below t '

min-If the wall thickness at-the deepest pit is less than tmin, then the localized-thinning may be analyzed to determine if it is acceptable. EPRI Report SIR-87-010 presents three methoda for three different types of thinning shapes. ,

A relatively large locally thinned area may be qualified by using criteria in 7 ASME Section III, NB-3200 to perform a primary membrane stress analysis.

- Locally _ thinned areas with a large axial dimension _but a small transverse or hoops dimension may be. qualified using ANSI /ASME B31 G which provides guidance for determining the acceptable wall thickness below t min r a given axial length.

Locally thinned areas with small axial and transverse dimensions, may be qualified using Branch Reinforcements guidelines from ASME ND-3643. This can be'used to determine acceptability of wall thickness below t min f r certain maximum dimensions for the thinned area.

I In addition, the corrosion allowance factor. A, may be reviewed to qualify tne L inspection: location for a shorter than original design life. In particular, the

! inspection location can be qualified for the remainder of the cycle, as long as

~

appropriate actions are taken to repair or replace the pitted area at the next

[. refueling outage.

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1309.014'

- SERVICES' PIPING THICKNESS EVALUATION PAGE 13 of 28 i'

L ARKANSAS NUCLEAR ONE ~

=1 CMAsfGE mafi DATE o9/22fe,

-pr ATTACHMENT III

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.i l-k AUT06.ATED STRAIGRT BEAM ULTRASONIC EXAMINATION OF FIFING r

PROCEDUER 50. DNV-UT.A.1.01 i.

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R12 REB 6/16/88 O Issued for use

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  • Effective Rev.

No. Description '

BT Q.A. Date l t

, . _ _ _ . _ _ _ . _ . _ _ ~._ __ . . ~ . . _ _ _ - - . _

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gggECTION: g LAN TITLE.: NO: '

I

  • - SERVICES PIPING THICKNESS EVALUATION- 1309.014

. PAtt 14 of 28 s ARKANSAS NUCLEAR ONE -2 == os m /89 CHANet Daft .

ATTACHMENT III i

h, -

ALHUMATED STRAIGET RgAM 6/55 I88 1 a, 7

" ULTRASONIC EXAMINATION OF FIFING DYNtff- A-1.01 0 i

l 1. 125tA11

.1.1 This procedure describe 6 the requirements for automated

- $ straight boas ultrasonic examination of wrought and

- cast steel piping systen veld and base metal for the purpose of thickness espying in piping systems by the -

contact method.

2. RESIX , ,

2.1 This procedure is applicable to steel piping systems of disseter range 100 se (4*) to 2500 (100') with thick-nesses. ranging free 5.0 no (0.197') to 50 es (2"), .

using automated equipment consercially known as P.$CAN.-

2.2 The enseinstion shall be performed with straight-base '

search units free the outside of the component being examined..- when accessible, with the objective of esp-ping corrosion in the required location. Search unit scanning shall be perfereed in both circumferential and saial directions free the.outside surface, as required. ,

.3. ousta's tempoustatttTits 3.1 Prior to performing the suosination, the owner shall furnish the following information, as applicable:

a. Identification of the components to be erasined
b. Location of areas to be-eussined
e. Drawings showing seafigurations
d. Material specifications.

3.2 The evner shall arrange ersetion and reseval' cf staging, seaffolding, and/or' ether equipment required to gain access to the esaminatten area. The owner shall further be responsible - that reasonable precau.

tiens are taken for the safety - of . the emanination personnel.

3.3 The owner shall arrange removal of insulation and provide a clean surface for a sinieue of 300 se (12")

on either side of the enseinsties location, i .

3.4 The owner shall be responsible for pre.easeination cleanliness and examination surface preparacion, including the reseval of paint, scale, rust, etc.

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h SERVICES W R PIPING THICKNESS EVALUATION 1309.014-k g~'

PAst 15 of 28

+

{ . ARKANSAS NUCLEAR ONE- =v=oa 2 OAT 09 m /89  :

CHADHbt oAft ATTACHMENT III '

bM Mv6 m'

'AlfftBIATED STRAIGEF BEAN 6/16/88 2 or 7

"""TLTRASONIC EIAMINATION OF PIPING gTyUT-A-1.01 4 B.tFERENCEE 4.1- The following documents are' referenced by and are part- i

'of this precedure, as. applicable:

1 '

4.1.1 American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code.Section XI. Rules for Inser.

vice Inspection of Nuclear Power Plants. 1983 Edition.

4.1.2' American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code.Section V. Nondesttuctive g Euesination. 1983 Edition.

.4.1.3 American Society for Nondestructive Testing (ASNT)

L. Reconsended Practice SNT.TC.1A. Nondestructive Testing l Personnel Qualification < and Certification. June 1975 li and 1980 Editions.

4.1.4 DNV.!SI Industrial Services.- Inc. (DNV.ISI) Written Practice. Nondestructive- Testing Personnel 1 Qualification and Certification. March 1988. -

4.1.5 Danish Volding Institute (SVC) Manuals

a. P. SCAN (FSF.3) Operation Manual. Rev. 1.01. August 1987.

l l! 5. PEERONMEL OBat.IficATION i

i 3

S.1 Forsennel operating F. SCAN equipment (P. SCAN operators) l shall be-tested and certified to a sinimus of Level II l., in ultrasonio esaatnation in accordance with DNV.ISI -

-t l

written practice for personnel certification to.SNT.TC.

1A.

5.2 Level II F.SCANI system operators . shall be trained and qualified in operation of the scanning and data acqui.

sitten equipment and be well versed in both software and hardware usage. Level I and Level I trainee personnel shall assist the operater, as required.

S3 Level 11 or Level III personnel trained in F. SCAN ultrasonic enseination methods shall evaluate F. SCAN data in accordance with the acceptance standards provided by the owner.

5.4 Level I and Level I trainee personnel shall receive documented training in the operation of the scanner'and appurtenant hardware. including attachment and the set.

up necessary prior to scanning.

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gggECTION: '

ggPLANTITLE: NO:

9' SERVICES PIPING THICKNESS EVALUATION 1309.014 PAet 16 of 28 ARKANSAS NUCLEAR ONE =v=oa CHANGE 2 mara Daft 09/2U89 ATTACHMENT III

~ "

Alf!UMATED STRAIGNT BEAM .

3 ,, 7

%TRASONIC EXAMIlff!0N OF FIPINC " '""""'

DNV-UT-A-1.01 0

6. tontrungt Ann MAftatal.a 6.1 Tant tauinment l

, 6.1.1- The principal equipment for thickness espping is the l SVC P.8CAN. The systes has a bandwidth greater than l

l; 1.0 to 5.0 MHs and utilises a logaritheit amplifier of

~

110 dB range to process signals from the ultrasonic t probe. Depth-of corrosion may be esasured in 0.1 se

{j. steps. '

l

f. 6 .1". 2 Either of the fully automatic weld scanner AVS.4 AV5 5 or AVS.2 or. sostautomatic weld scanner MVS.2 or MVS.1 and appropriate ' software shall be used for the emenina. .

tion. - Later, improved issues- of both hardware and software may aise be used. provided their performance  !

and data compatibility is verified and documented.

L 6.2 Enarah Unita ~!

6.2.1 .The primary search units used for detection shall be dual element 2 to 6 MHs, O degree longitudinal wave contact probes.

6.2.2 Search' unit size shall be ~ dictated by the ability of i the search unit te maintain good contact with the test surface, but should generally be in the rangs of 0.05

}c i to 1.0 square inch of active crystal element area.

6 '. 3 calibratian 11aaka 4

6.3.1 Certified IIW blocks er other equivalent designs shall be uttlised for calibration.

6.3.2 . Other calibration - bleeks shall utilise a series of eachined stepe of kneva thicknesses by which the systee

'can be fine-tuned to

  • read' serrest thickness values by fashioning a set of esaminattee paraseters on sesaning the subject block. ,

6.3.3 Surface finishes of the bleeks shall be representative oO the surface finish of the piping.to be examined.

6.4 couplanta 5.4.1 Couplants shall be approved by the owner prior to use.

For the-automatic scanners, pumped water shall be used as a couplant.

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SERVICES PIPING THICKNESS EVALUATION 1309.014 -I PAGE- 17 of 28

- ARKANSAS NUCLEAR ONE CHANGE '

a=== 1 nat. 09/22/8, DaTE ATTACHMENT III

= __

A1MtsuTFD ETRAtcirF m'M 6/16/88 4 er 7

"""" ULTRASONIC EIAMINATION OF PIPING p7yyUT.A-1.01 l

i

7. cA1.IntAftos 7.1 cartificataa 7.1.1 Current calibration f or, the following equipment shall be verified prior to use. including certificate ,

numbers, calibration dates and dates due.

'a. Manual UT Instruments Calibration Blocks b.

C. p. SCAN. processor

d. Ultrasente probes t

7,2 f aa e r==== ne calibratian 7.2.1 The manual UT instrument shall be calibrated for screen height linearity.,asplitude control linearity and sweep at intervals not to exceed 90-days. in accordance with Supplement S and 6. Appendia III. ASME Section 11.

7.2.2 The concepts of screen height, amplitude control and i sweep are not applicable to the-p.8CAN'systes. Factors governing the accuracy of seasurements of amplitude and i:

p position of indications include return sche timing '

seasuremente, amplitude sensurements and probe position j- i eessurements.

7.2.3- The return oche timing and probe position sensurement

! capability shall be checked electronica*Aly or, alterna.

l; tively, by scanning a reference target, e.g., a notched' L calibration er reference block. This shall be checked b every 90 days or before long ters en sination periods.

7,4 Swaema emitheattaa ab i'haak.

7.4.1 General' Requirements 7.4.1.1 Calibration shall include the semplete p. SCAM system.

Any' change in search units. shoe s . 'p r e,b e s . couplants, cables, or any other parte of the eussination system shall be cause for salibration shock. Calibration shall be perfereed on the beste salibration block.

l.

l 7.4.1.2 The ' steps" en the calibration bleek shall be scanned and system parameters adjusted, as required. such that

' -l thickness values being read by the p. SCAN are 1 0.2 en of actual known step values.

[.

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e-ggggECTION: g PLAN TITLE: NO:

SERVICES PIPING THICKNESS EVALUATION 1309.014 PAGE 18 of 28 ARKANSAS NUCLEAR ONE ====

CHANGE 1 DATi Daft 09 m /89 _

l ATTACHMENT III O

ALflVMATED STRAIGNT BRAM 7/T6N $ ,, 7 asser inammi asasen IffRASONIC EIANIllATICII 0F PIPIIIG DifV-UT-A-1.01 0 lJ ,

7 . 4.1. 3 ' For contact examination, the temperature difference between the - examination and basic calibration block surfaces shall not exceed 25 F (14 C).

7.4.1.4 Calibration shall be perfgreed from the surf ace of the calibration block- which corresponds to the. component .

l f surface to be examined, l-7.4.2 ' system Calibraties confirmation ,

- 7.4.2.1 Complete systes calibration, shall be performed within
  • ene. day prior to use of the system for examination of those itene for which the calibration is applicable.

(.

7.4.3 systes Calibration Cheek ,

7.4.3.1 A systes-calibration check, which is verification of thickness of ' steps' en the calibration block, shall be performed (1) at the start and finish of each examina.

tien. (2) with say change in examination personnel and (3) at least every 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> during an examinesion.

7.4.4 Cortsetive Astiene 7.4.4.1 If thickness measurements,are read by the F* SCAN have l

decreased er increased by greater than 1 0.2 as, all data sheets since the last salibration shall be voided.

l A new ealibration shall be made and recorded and'the voided areas shall be re.esasised, i

3. marnamnen nyeTam 8.1 A referesse systes shall be established to locate the search unit sore position and to determine its position in reference to piping 'landsarks', such that examina.

tiens say be duplicated at a later date, if desired.

  • The sean positive Y direction shall follow the flow i.

direction, .with. the positive 1 direction clockwise '

li festag devastream. .

9. REARIEATION 9.1 anrfman Candiziana

{L 9.1.1 The esamination surface shall be free of irregular 1 ties loose asterials or esatings which could interfere O

l- with ultrasents wave transmission.

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, h SERVICES PIPING THICKNESS EVALUATION 1309.014'

.{ ARKANSAS. NUCLEAR:ONE PAGE

= =oa 1 19 of 28

== 09/23/89 e

CHANet o&TE y- - ATTACHMENT III K.e __ __ amu .= .

p  ! AuftMATED S11AIGET BEAM 6/16/88- 6 se' 7 ,

TRASONIC EIAMINATION OF PIPING D NNY-A-1.01 0

{

9.2 Ecanning Emmad ,

9 . 2 .1 - Scanning speed shall not exceed 150 me-(6 inches) per

.,. $second. Slower scanning speeds may be necessary.

Y, j^ 9.3 cavarama I

9.3.1 ,To ensure complete coverage of the examination area. ,

each pass of the search unit shall overlap at least 10% '

of the search unit width.

9 . 3 .' 2 - The probe shall' be manipulated' isterally and longitu.

dinally, such that the sound beam passes through the.

required examination volues.

9,4 Scannina Taahniana ,

j. 9.4.1 A survey of the examination area shall be made to l: locate longitudinal . weld - seems, mechanical obstrue.

E tions,. surface irregularities or other conditions that l' might possibly interfere with scanning.

-9.4.2 All sensurements, observations and noted obstructions to examinatten.of the required valuee shall be recorded by the operator using the p. SCAN coordinate system.

9.4.3 Subsequent to completion ef the operations' described in 9.4.1 and 9.4.2, above, the scanner guide band, scanner and scanner > drive helt will be attached to the pipe be.

ing examined. se applicable. Scanning is to cessence after sospiscing the required positioning procedure for the type of scanner in use.

l.- l10. EkconnInc 0F NATA 1-10.1 ' A'11 dets over the entire systes dynamic range shall be recorded by the p. SCAN system automatically, or on keybeerd sossand by the operator.

11. tuvasticATrom DF DATA 1

! 11.1 Data shall be evaluated on completion of a scan.

. b h

i

__.________m_._m_m_____m________m_- -

--4* - = - - - - _ . _ _ _ . _ _ _ _ _ . _ _ . _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ . _ _ . _ _ _ _ _ _ _ _ . . _

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t ce, a ggECTION: gg%gR PLAN TITLE: O

\' SERVICES- PIPING THICKNESS EVALUATION 1309.014 PAeg 20 of 28 ARKANSAS NUCLEAR ONE =1 ga, 09/2U 89-ATTACHMENT-IV

=

3 nu- seu -

AUTOMATED STRAIGHT BEAM __6/16/88 7

~

op 7 emam inaus au* son

-ULTRASONIC EIAMINATION OF PIPING DNY-UT-A-1.01 . 0 11.2 The operator shall print out the scan data for inclu.

eion with the report. The Side view image is a coage.

, site' view showing all thickness seasurements projected into one . plane perpeddicular to the examination sur.

face. The Top - view shows areas with wall thicknessos measured less than a given level called tho' display

. level.

By varying this display level, a complete map of ' thishness tepegraphy say be obtained, along with eintaus, saximus and ' average *

  • thicknesses for the component la the losetion.
12. ACCRPTANCR ATARBARDA 12.1 The aceoptaneo er- rejection of reported thickness readings -shall be in accordance with criteria established by the evner.

'13 . -

13.1 SanAEal 13.1.1 Calibraties.'systes parameters'and scanning information shall be recorded at the time of the examination and calibraties. Records shall include personnel, date and time.-as a sintaus.

13.2 nata miaka 13.2.1 Calibraties and sean filso shall be assempanied by a data set containing, but not limited to, the following informaties: .

a. Site identity and systoa '
b. personnel and eartification levels
o. Date and time
d. 'Seasser type
e. Cable type and length n

13.3 Raamaantamina 13.3.1 A writtea report shall be completed by the p.8CAN operater plus hard sepy priateute of the osan data.

14. DATL_2RARAM122AL 14.1 Examination records. taeluding salibraties sheets, data sheets, and data diskettes (when required), shall. be submitted to ' the owner for retention in teres of the inspostion sentrast.

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L* SERVICES- PIPING THICKNESS EVALUATION- 1309.014 ,r l' .

PAGE 21 of 28-

' ARKANSAS NUCLEAR ONE -2 CHANGE-Dave

-SAft os m /89-

^

U ATTACHMENT IV l

0

- I W'

dula e

Date f.

DNY NousmAL samnCIL MC.

'~ - ^

maos mnow - A. It . M sunt no g,Tt/Maneser Date Housx*, TcLAs nos4 nN M bisse S-1 9V C11dat Appro41 Date-s .

L. .

i7 l

. MANUAL ULTEA8051C TRICENESS NEASUREMENTS of FERRITIC STEEL and AUSTERITIC STEEL h

PROCEDURE 30. D5V.DT.M.1.01 i

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-SERVICES PIPING THICKNESS EVALUATION -1309.014 l PAes 22 of 28- ,

ARKANSAS NUCLEAR ONE aev=oa i **'s 09m/89 R CHANGE DATE ATTACHMENT'IV "DNUALULTRASONlC{ttFfHICKNESSMEAgUR{Tf urutt as creatt F an d ADC rM d --~'1Y-88 6* l OP 7 J M EL* DNV-UT-M-1.01 0

'l l

1 l

1. Ifa!.1 I 1.1 .This - procedure describes the requirements for the )

$ performance of manual ultrasonic thickness measurements of ferricic steel and austenitic steel piping systems.

2. APPLICATIcE 2.1 These requirements . are established for the ultrasonic thickness measurement of base material for ferritic and

-sustenitic steel piping having a nominal wall thicknees of 0.10 to 4.0 inches. The examination .shall be i performed by the contact method from the outside, where '

possible.

3. ovutt's fetimmT) masPossintttT11s 3.1 In order to perfora the ultrasonic examination, the l -- owner shall be responsible for the following i information, data and/or servicest '
a. Identification ofs the areas (component) to be aussined b b.. Location of the areas to be enseined
e. Detailed drawings of the piping system -)

configuration

d. .Naterial specifications
o. Ceaposent drawings
f. greetion and reseval of staging, scaffolding, or

, _ ether equipment. te provide access to the esamination area 3 Reseval of insulatten, pre.esamination cleaning. '

and eussination surfase preparation

h. Provide sufficient illumination at the site to

, properly perfore the esamination

1. Supply the basic calibration block unless otherwise provided in the centract l

I' e

N

...l.m.'._1 _ _ _ . . . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . . . . _ _ _ . _ _ _ . . . , . .. . _ . . . . . , . _ , _ . . . _ , , _ . , , _ , , . _ . . , , . _ . _ . . . . . . _ , _ .

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SERVICES' ' PIPING THICKNESS EVALUATION I309.014

- PAet 23 of 28 l L

ARKANSAS NUCLEAR ONE J

" anv=oa 1 OAT 09 m /es CHANet

~

! DATE ATTACHMENT IV 1

" ~

ol FM m e" E n M M c W " "

'ihtigg' 2 7-

- - - r p sesse

' DNV-Uf-N-1.01 0 L4 atrattacts l

1- 4.1: _ The following documents are referenced by and are part

'of this procedure, as applicable:

4.1.1 American Society of Mechanical Engineers (ASME) Boiler and Pressure vessel Code.Section V. Nondestructive t

l- Examination. 1980 Edition with Addenda through and i-t.

including Winter 1980, p

4.1.2 American Sectety of Mechanical Engineers (ASME) seiler

and Pressure vessel Code. Section KI. Rules for E

Inservice Inspectien of Nuclear Power Plants. 1980 Edition with Addenda through and including Winter 1980. '

4.1.3 'American Society for Nondestructive Testing (ASNT)

Recoseended Fractice SNT.TC.1A. Nondestructive Testing i Forsonnel Qualification and Certification. June 1975 and 19CO Edition.

4.1.4 DNV Industrial services. Inc. (DNV.181) Written Fractice. QAF.9.1. Nondestructive Testing Forsonnel Qualification and Certification. March 1, 1988. ,

5. PERS0 mutt S.1 Fersennel performing: ultrasonic examination in accordance with this precedure shall be qualified in ,

accordance with 4.1.3 above. including references to ,

4.1.2. Personnel perforsius operations shall be qualified to at-least Level I; interpretation shall be

  • perfereed by Level II er Level III personnel.
6. montenant amontaammata 6.1 A pulse.eehe ultrasonic flaw deteetion instrument shall be utilised for this enasination. The instrument shall be espable of generating and receiving frequencise over the nesinal range of 1 mms to S MHs. Other frequencies may be used if equal or better sensitivity can be desenstrated. The ultrasonic instrument shall be equipped with a stepped gain control calibrated. in units of 2 da er less, assurate ever-the useful range to 20% of the nominal amplitude ratio. to allow seasurement of indication beyond the linear range of the vertical display en the screen. The ultrasonic  ;

instrument shall provide linear vertical presentation I within 1 54 of the full screen height.

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WIN N WC N O SERVICES PIPING THICKNESS EVALUATI0f4 24 of 28 1309.014 f .. .

PA8E

    • = 09/2n 89

- ARKANSAS NUCLEAR ONE arvaaa 2 CHANGE DATE l

l ATTACHMENT IV u

V bk UWE[ ~

3 6 88 3 or 7' l DNV-Lfr-M-1.01 O b r l- 6.2 The nominal search unit . f requency shall be 2.25 MHz. [

unlese variables such as production estorial grain ,

structure necessitates the use of other frequencies to sobtain adequate penetration and/or resolution. Search units may utilise either single er dual transducer elemental. sise shall b's in the range of 0.25 inch to 1.0 inch, with the shape being round. square, or rectangular.

6.3 Commercially available couplants such as Ultraget 11 shall be used for calibration and esseination.

6.4 calibration blocks shall be of the same nominal eaterist as the~ material to be smasined. The besto calibratten block shall be a step wedge. representative of the-thickness ranges espected in the esterial. The thickest step shall be of at least the nominal design thickness of the esterial to be enseined.

7. CALTREATIGE 7.1 Instrument Calibratian l

7.1.1 Instrument calibration for screen height and amplitude control linearity shall be verified at intervals not to en.eed three senths.

7.2 saraam Maight Linaarity 7.2.1 The ultrasente instrument shall provide screen height linearity within Se of full range for at least tot of L the full screen height (F8H) (base line to easinus estibrated screen points). To verify the ability of t.

the uitrasents instrument to meet the above. designated linearity requirements, positten a search unit se that echoes can be observed free any two . reflectors in a estibration bleek. Manipulate the search unit to establish a 2 to 1 ration of amplitudes between the two echoec. Adj us t the gain centrol se that the larger

, echo it, at 804 FSE. with the sea 11er sehe at 404 FSH.

Withe =6 noving the seersh unit, adj us t the sensitivity (gain) to sucesssively set the larger echo free 1004 to 204 FSK in 104 increments (or 2 dg steps if a fine sensitivity control is not available). Road and record the relative sep11tudes of the two echoes to the nearest 14 FSM. The sep11tude of the smaller echo must l- be $04 1 50 FSM of the larger sehe.

1.

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7,) Ammlituda Central linearitw

. 7 . 3 .1. The ultrasonic instrument shall utt11:e - an sep11tude scontrol, accurate over its useful range to 20t of the nominal amplitude ratio to allow measurements of- .

indications beyond thi linear range of the vertical CRT -

display. To verify the accuracy of the esplitude control to the above. designated requirements, positten a search unit se that an sche from a reflector in a With the calibration block is peaked on the screen.

increases and decreases in attenuation the echo amplitude shown in

' supplementL 6 of Reference 4.1.2 shall , f all within the specified limits. Amplitudes ,

shall be estimated to the neatest 14 FSH. .

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7.4 saarah Unit Calibratian y 7,4.1 Calibration shall include the complete ultrasonic eussination systoa.- The original calibration shall be performed on the basic calibration block. Checks shall be sede to verify the sweep-. range calibration and dtstance amplitude ' correction. Checks shall include the entire eussination system.

j; Is j' 7.4.2 The manieus indicatione shall be obtained with the I?

sound beam oriented perpendicular to the inside surface L .of the calibration bleek.

7.4.3 For contact eussination, the temperature of the o enseinstion and basic calibratism block surfaces shall be within 25 degrees-F. (14 degrees C).

7.4.4 Calibration shall be performed free the surface of the calibration , bleek which corresponds to the surface of /

the coopensat free which the emasination will be perfereed.

7.5- avstas chaak

. ;7 . 5 .1 Alternate cables and search units, singly and in combination, that have been included in a prior system calibration may be substituted in the system: such substitution shall not necessitate a calibration check.

When any other part of the esamination system is changed, a calibration check shall be made en the basic calibraties block to verify sweep range and distance amplitude correction values. A calibration check of sweep range and sensitivity values shall be perfermed:

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h SERVICES PIPING THICKNESS EVALUATION 26 of 28 1309.014 9

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ATTACHMENT IV l

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- ass suas w MANUAL ULT E MNH_G THI unsaa REASU to - - -

of FERRITIC STEEL and AUSTENITIC 6/16/88 5 on 7 samer 'mamun n1 -

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'a. At the start and finish of each essainationi.

b. Every 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> during the examination, and C. With every change of personnel.
7. 5- calthrattan confirmatian ,

7.3.1 Straight base calibration shall be performed prior to use of the. systen- in the thickness range under enseinatten. A~ calibration check shall verify the -

sweep range salibration.

7.6- straight maan calthracian , l

!i 7,6.1 The nominal' frequency s' hall be 2.25 MHs unless variables such as production motorial grain structure

. require the use of other frequencies to assure adequate -[

penetration or improved resolution.

7.6.2 The straight besa calibration' shall encompass measurements of sweep range calibration.  ;

7.6.3 For material chickness l' or less the basic calibration l block stall be used to salibrate the screen / sweep to 1.0a. Use the sweep fino and delay controls to-calibrate each maj or screen division to 0.10* . Use the sweep fine and delay controls to calibrate each major screen division to 0.10', e.g.. a 0.20' step echo at'2 screen divisions, a 0.50* stop echo .at 5 screen divistens, etc.

7.6.4 For esterial thicknesses of 1.0* to 4.0", the basic calibration block or a certified IIV block may be used to calibrate the screen / sweep to 4.0'. With the IIV

- block on its side and obtaining an echo from the 1.0" thickness, place the first backwall echo at 2.3 screen divistens. -While adjusting ~ the sweep fine and delay sentrols, saintain the first backwall- at 2.5 screen divisions and move the 2n4, 3rd, and 4th backwall echoes to 5.0, 7.5, and 10.0 screen divisions, >

respectively. Each major- screen division is now representative of 0.40*.

g. anarAct PatranATIDE 8.1 The base estal shall be free of weld spatter. surface irregularities or foreign matter that might interfere -

with the eassination.

-e 8.2 Scanning speed shall not saceed 6 inches per second.

slower scanning speeds say be necessary.

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4. 3 - To ensure complete coverage, scanning of the required t examination voluse, each pass of the search. unit shall

-overlap a minimum of 104 ef the- transducer i

s(piezoelectric element) dimension perpendicular to the

' scan.

L 9, arenantaa or tunicartons

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9.1 Each ares enasined shall -be identified with its miniaue, saximus, and nesimal remaining vail thickness.

- 10. AccarTAuct sTAunatas f ,l

10.1 Acceptance criteria will be established by the owner. .

11. REPORTS

_11.1 Reports sha11' consist of a ca11bretten data record and ac esamination data record which . shall- contain the -

following sinisue information:

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l 11.1.1 Calibraties Data Record 3 u

a. Calibration . sheet identific3 tion. and calibration f)' date.
b. Client, site er project designation.
c. 'Itases of examination personnel and levels of certification.

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d. Enaminatten procedure number and revisten.
l. e. Calibration block identification. *
l. f. Test instrumentidentification,identification and serial serial number.

number, 3 Searah' unit frequency and sise.

h. Bess angle sad sede of propagation in satorial.

1.. s5pecial seereh. units, wedges, and shoe types.

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  • j. Couplant and hateh number.

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.: k. Instrument- setting. suffisiently identified to permit repetition of emanimation at a later date.

l: 1. Sweep readings free the calibration reflector (s).

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a. Times of initial salibration and subsequent '

calibration checks.

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  • 1 l3 = SERVICES PIPING THICKNESS EVALUATION 1309.014

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I 11.1.2- Raaminaties Data Reeord

a. Data sheet identification -and applicable t

calibration sheet identification.

.b. Date and time period of enseinstion.

c, Neses of examination pereennel and level. >

3 certification.

d. Esasination procedure and revision. .,
e. Identification' and location of the component t

and/or the values scanned.. Marked drawinge of sketches will satiety this requirement..

f.

Surface free which the esteinatten to conducted.

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