ML20010C177
| ML20010C177 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek, Callaway  |
| Issue date: | 08/08/1980 |
| From: | Foote S NUCLEAR ENERGY SERVICES, INC. |
| To: | |
| Shared Package | |
| ML20010C175 | List: |
| References | |
| 80A3479, NUDOCS 8108190219 | |
| Download: ML20010C177 (11) | |
Text
.
inclosure 2 to SLNRC 8141 DOCUMENT NO, 80A3479 REV.
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NUCLEAR ENERGY S :RVICES, INC.
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REFERENCE ULTRASONIC EXAMINATION PROCEDURE FOR REACTOR COOLANT PUMP FLYWHEEL FOR STANDARDIZED NUCLEAR UNIT POWER PLANT SYSTEM
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Project Application Prepared BY Date 5555 PSI /ISI S. Foote 8/8/80 APPROVALS TI T L E /DE PT.
SIGNATURE DATE g[yto Mgr. Field Engineering y
d F.T. Carr UT III Project Manager
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E.C. Doubleday g -/8-gd Q.A. Manager V.J. Potent
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80A3679 DOCUMENT NO.
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REFERENCE ULTRASONIC EXAMINATION PROCEDURE FOR REACTOR COOLANT PUMP FLYWHEEL
- 1. SCOPE 1.1 INTENT
. Note: This procedure is based on access from the top or bottom and the side of the flywheel.
This procedure shall be used in conjunction with NES Procedure 80A3467 unless otherwise specified. 80A3467 contains all of the general requirements applicable to this examination procedure. This procecure contains all of the specific application requirements for the examination of the ' reas specified a
in Section 1.2.
l.2 AREA OF EXAMIN/irION i
This document covers the ultrasonic examination procedures for the Reactor Coolant Pump Flywheel shown in Figures 1 and 2.
1.3 TYPE OF EXAMINATION I
1.3.1 Volumetric ultrasonic examination shall be performed using ultrasonic pu'se echo nominal 10 refracted longitudinal yeam applied to the Flywheel octer perimeters (circumference) and 0 straight beam longi-tudinal techniques applied to the outside surfaces of the Flywheel top, or bottom to determine the presence of any laminar reflectors.
1.3.2 The examination shall be performed manually using contact search units (transducers) and/or scan fixtures.
1.4 TIME OF EXAMINATION These procedures shall govern th'e preservice (baseline) examinations, inser-vice examinations, and reexamination of repaired areas of the Flywheel as required by U.S. Nuclear Regulatory Commission Regulatory Guide 1.14 and the ASME Boiler and Pressure Vessel Code,Section XI.
1.5 MATERIALS
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The Flywheel is constructed of manganese-molybdenum-nickel alloy steel, i
ASTM A-533 Type B, Class I material.
FORM
- NES 205 2/80
m DOCUMENT NO.
ROA1479 II NUCLEAR ENERGY SERVICES. INC.
PAG E OF f
- 2. REFERENCES 2.1 REFERENCE DOCUMENTS 2.1.1 80A3467 NES Reference Procedure for Ultrasonic Examination General Requirements.
2.1.2 80A2923 NES Referer e Program Plan 2.2 APPLICABLE DRAWINGS 2.2.1 Drawings 1.
W Dwg.1498F91 2.
W Dwg.1806B94 3.
W Dwg. 8881D85 4.
W Dwg.1657F16 5.
W Dwg. 4737C99 6.
W P.D. Spec.10310CR through CS Rev. P.
2.2.2 NES Weld Maps g
t (Found in the Program Plan) 2.2.3 Calibration Standard Drawings (Later)
- 3. PROCEDURE CERTIFICATION The examination procedure described in this document is in conjunction with NES Procedure 80A3467 and complies with Section XI of the ASME Boiler and Pressure Vessel Code 1974 Edition, Summer 1975 Addenda, except where examination coverage is limited by part geometry or access.
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- 4. PERSONNEL CERTIFICATION 4.1 Each person performing ultrasonic examination governed by this procedure shall be certified in accordance with NES Precedure 80A3467.
4.2 Examination crews shall have two or more members, as necessary. At least ont; member of each crew shall have a minimum qualification of Level II in
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accordance with the above referenced documents.
FORM
- MK$ 89@ @Ein
DOCUMENT NO.
80A3479 11 mar ME 5
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- 5. EXAMINATION REQUIREMENTS 3.1 The nominal examination frequency shall be 2.25MHz for all straight beam and angle beam examinations.
5.2 EXAMINATION ANGLE AND COVERAGE 5.2.1 Each flywheel shall be ultrasonically examine-1, where part geometry and access permit, using 10 ref racted longitudinal beam techniques applied in two directions towards the bore area from the outer perimeter (circumference) of the flywheel. Indications detected are to be recorded in accordance with Procedure 80A3467.
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5.2.2 StraigPt beam techniques shall be applied, where pat t geometry and access permits, in one direction from the accessible side of each flywheel section.
5.2.3 Other angles may be used if required for aid in evaluation.
5.2.4 Coverage for the area specified in this procedure is shown in Figures 1 and 2.
5.3 LIQUID COUPLANT 5.3.1 The ultrasonic couplant shall be suitable for the examinatica of nuclear components and shall be certified to have less than 1% sulfur and halogens by weight.
5.3.2 The couplant shal: be supplied in clean containers of sufficient quantity for performance of the examination.
5.3.3 Sonotrace may only be used in the following temperature range: 32 F to 120 F. For temperatures over 120 F and up to 150 F, Ultragel snall be used. No ultrasonic examinations shall be performed on component:
over 150 F.
- 6. EQUIPMENT REQUIREMENTS 6.1 EXAMINATION CONTRACTOR'S REQUIREMENTS The following test equipment or its equivalent shall be provided by the Examination Contractor (as a minimum) for examination of the welds specified in this procedare.
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Pulse echo ultrasonic instrument 2.
Wedge,10 ref racted longitudinal wave FORM 8 NES 205 2/80
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mur DOCUMENT NO. 80A3479 6
II NUCLEAR ENERGY SERVICES. INC.
PAGE OF C.
3.
Search unit 1/2 in, to 1-1/8 in, diam 2.25MHz 4
Couplant.
6.2 PLANT OWNER'S EQUIPMENT The Plant Owner, or his Agent, shall provide the following service facilities and equipment as required.
1.
Scaffolding 2.
Water, al., and electricity 3.
Adequ:.tc temporary lighting 4.
Moving er lif ting devices 5.
Radiation monitoring equipment (when applicable)
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Radiation shielding (when applicable) 7.
Test surf ace preparation (cleaning and finishing) 8.
Drawings of each examination area 9.
Post-examination clean-up of test area.
- 7. CALIBRATION REQUIREMENTS 7.1 CALIBRATION DATA SHEETS Calibration Data Sheets shall b2 numbered 3479-1, 3479-2, 3479-3, etc.,and shall be signed by the examiner (s) upon completion, noting applicable NDE certification levels. A Calibration Data Package shall cnnsist of a Calibra-tion Data Sheet, Scan Data Sheet, and an Indication Report Sheet, as required.
7.2 CALIBRATION STANDARDS 7.2.1 The bore and kgyway of the flywheel itself shall provide the reference required for 10 angle beam examination.
7.2.2 The appropriate identity of each flywheel for each examination shall be recorded on the Calibration Data Sheet.
7.3 REFERENCE SENSITIVITY LEVEL 7.3.1 The reference sensitivity level for 0 examinations shall be established by obtaining a response from the base material of 80% Full Screen Height (FSH). Any indication equal to or greater than the initial back reflection shall be recorded.
l FORM # NES 205 2/80
y DOCUMENT NO.
80A3479 NUCLEAR INERGY SERVICES. INC.
PAGE 7
OF 11 f
7.3.2 Reference sensitivity level for the 10 refracted longitudinal beam examination shall be established by obtaining a response from the bore keyway areas. The reference sensitivity sh?ll be 80% FSH.
7.3.3 During actual component (Flywheel) scanning, the reference sensitivity level shall be increased a minimum of 2X (6dB).
- 8. EXAMINATION SYSTEM CALIBRATION 8.1 STRAIGHT BEAM CA1.IBRATION Straight beam calibration shall be performed as follows:
1.
Position the search unit to obtain the maximum response from the base material.
Set the back reflection at the eighth screen divisien.
Adjust the sensitivity control to provide a signal amplitude of 80% FSH and mark the location and amplitude on the CRT.
2.
This is the reference sensitivity level for top and bottom of the flywheel. Record all sensitivity control settings on the appropriate Calibration Data Sheet.
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3.
Upon completion of calibrations, ensure that all data and instrument settings are recorded on the Calibration Data Sheet. The examiner (s) shall sign the completed data sheet, noting applicable NDE certification levels.
8.2 CALIBRATION FOR BORE AND KEYWAY EXAMINATIONS Angle beam calibration shall be performed as follows:
1.
Place a O search unit on the circumference of the flywheel and obtain an echo from the bore, in order to establish sound path distances required for this ultr'. sonic examination.
2.
Position this echo at the 6th horizontal screen division with the entry surface at the O digision. If the flywheel has not been previousig marked for 0, the keyway should be located l
and flywheel 0 marked.
i 3.
Maximize the signal response from the side of the keyway and adjust the sensitivity level to give a signal amplitude of 80%
l FSH with the 10 refracted longitudinal beam transducer I
positioned on the outer circumference of each Flywheel. This echo will occur at approximately 7 horizontal screen divisions.
This position of the echo signal response at plus or minus I horizontal screen division constitutes the area of examination
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(i.e., 6 to 8 CRT horizontal screen divisions).
4.
This is the ref erence sensitivity level for the examination area. Record all sensitivity control settings on the appro-priate Calibration Data Sheet.
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I DOCUM6NT NO. 80A3479 mur PAGE 8
op 11 NUCLEAR ENERGY SERVICES. INC.
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Instrument is now calibrated for examination of the flywheel section for which calibration was just performed.
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6.
Record a!! data and instrument settin3s on the Calibration s
Data Sheets and sign upon completion, noting applicable NDE certification levels.
7.
Repeat steps (1) through (6) for each diff erent flywheel section just prior to examination.
- 9. EXAMINATION PROCEDURES 9.1 Refracted longitudinal beam examination of the flywheel shall be performed at a scar.ning sensitivity level at least 2X (6dB) greater than the calibrated
. reference sensitivity level. The actual scan sensitivity shall be recorded on the calibratior, data sheet.
9.2 A suitable scan pattern sha'i be useo allowing a minimum of 25% overlap of the transducer width (diameter) for each scan pass.
9.3 Continue scanning sequences until all areas have been examined using the appropriate angle positioned for the directions shown in Figures 1 and 2.
Examinations shall not be considered complete until all recordable indications
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have been evaluated.
- 10. EVALUATION CRITERIA Allindications that produce a respone greater than 20% of the ref erence level shall be investigated to the e xtent t hat the examiner car.evaluat et hesha pe, identity,andlocation of all such reflectors.
10.1 Nongeometric indications occurring during 0 examination shall be recorded in inches from the surface, and in inches clockwise (CW) or counterclockwise (CCW) from the datum point when looking down upon the top of the Flywheel and in inches outboard from the flywheel bore.
10.2 Neogeometric Indications occurring during angle beam examinations shall be reported in inches below the datum point, and in inches (degrees) CW or CCW f rom the datum point.
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l FORM
- NES 205 2/80
DOCUMENT NO.
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II PAGE OF f
NUCLEAR ENERGY SERVICES. INC.
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FIGURE 1.
ULTRASONIC EXAMINATION OF FLY WHEEL.
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FORM 4 NES 205 2/80
m DOCUMENT NO. ROA1479 10 II PAGE OF
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using 10" refracted Scan two directions longitudinal beam.
0 Straight Beam for Calibration Only 7
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FIGURE 2.
ULTRASONIC EMINATION OF FLTWEEL BORE FERIMETER AND KEYWAY AREA.
FCRM # NES 205 2/80
80A3479 DOCUMENT NO.
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PAGE II OF 11 NUCLEAR ENERGY SERVICES, INC.
'f COMPONENT SCAN DATA SHEET Procedure No.
Subject:
1.
Calibration Data Sheet No.
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Examination Angle 3.
Area of Examination 4.
Examination Surface Figure 3 COMP.
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Time Date Time Date 1.
Level Date 2.
Level Date Int.
Reviewed Date Int.
Final SKETCH:
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