CP-201401035, Relief Requests Nos. B-7, B-12 and B-13 for the Second 10-Year ISI Interval (Second ISI Interval Start Date: August 3, 2004; Second ISI Interval End Date: August 2, 2014)
| ML14253A211 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 08/27/2014 |
| From: | Flores R, Madden F Luminant Generation Co, Luminant Power |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| CP-201401035, TXX-14103 | |
| Download: ML14253A211 (41) | |
Text
Rafael Flores Luminant Power a Senior Vice President
& Chief Nuclear Officer Rafael.Flores@Luminant.com P 0 Box 1002 6322 North FM 56 Glen Rose, TX 76043 Luminant T 254 897 5590 C 817 559 0403 F 254 897 6652 CP-201401035 Ref. # 10CFR50.55a(g)(5)(iii)
TXX-14103 August 27,2014 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555
SUBJECT:
COMANCHE PEAK NUCLEAR POWER PLANT DOCKET NO. 50-446 UNIT 2 RELIEF REQUESTS NOS. B-7, B-12 and B-13 FOR THE SECOND 10-YEAR ISI INTERVAL (SECOND ISI INTERVAL START DATE: AUGUST 3,2004; SECOND ISI INTERVAL END DATE: AUGUST 2,2014)
Dear Sir or Madam:
Pursuant to 10 CFR 50.55a(g)(5)(iii), Luminant Generation Company LLC (Luminant Power) is submitting Relief Requests B-7, B-12 and B-13 for Comanche Peak Nuclear Power Plant (CPNPP) Unit 2 for the second ten-year inservice inspection interval. A proposed relief is requested from the requirements of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code,Section XI 1998 Edition through the 2000 Addenda, for inspection impracticality for Steam Generator Head-to-Tubesheet welds.
The basis and justification for the relief request is attached.
A member of the STARS Alliance Callaway - Comanche Peak
- Diablo Canyon
- Palo Verde
- Wolf Creek
U. S. Nuclear Regulatory Commission TXX-14103 Page 2 of 2 This communication contains no new commitments regarding CPNPP Unit 2.
Should you have any questions, please contact Mr. Jack Hicks at (254) 897-6725.
Sincerely, Luminant Generation Company LLC Rafael Flores By: /4d W7-a--
/Ferld W. Madden Director, External Affairs Attachments: 1. CPNPP Unit 2 Relief Request Number B-7
- 2. CPNPP Unit 2 Relief Request Number B-12
- 3. CPNPP Unit 2 Relief Request Number B-13 c- Marc L. Dapas, Region IV Balwant K. Singal, NRR Resident Inspectors, Comanche Peak Jack Ballard, ANII, Comanche Peak Robert Free Environmental Monitoring & Emergency Response Manager Texas Department of State Health Services Mail Code 1986 P.O. Box 149347 Austin, TX 78714-9347
Attachment I to TXX-14103 Pagel of 11 10CFR 50.55a REQUEST NUMBER B-7 RELIEF REQUESTED IN ACCORDANCE WITH 10CFR50.55a(g)(5) (iii)
- INSERVICE INSPECTION IMPRACTICALITY
- 1. ASME Code Components Affected:
ASME Code Class: Code Class 1
References:
ASME Section XI, Table IWB-2500-1 and IWB-3510 Examination Category: B-B Item Number: B2.40
Description:
Code required examination coverage for the weld volume is impractical Component: Steam Generator 2-02 Head-to-Tubesheet Weld TCX-1-3100-2-1 Component Number: TCX-RCPCSG-02
- 2. Applicable Code Edition and Addenda:
ASME Section XI, 1998 Edition through 2000 Addenda.
- 3. Applicable Code Requirement:
ASME Section XI 1998 Edition through 2000 Addenda, Figure IWB-2500-6 (Design B) requires a minimum volumetric examination of the weld volume extending 1/2t into the base metal on both the head side and tubesheet side of the head-to-tubesheet weld (Code Item B2.40).
Comanche Peak Nuclear Power Plant (CPNPP) Unit 2 second ten-year interval Inservice Inspection Program Plan also implements Code Case N-460, "Alternative Examination Coverage for Class 1 and Class 2 Welds,Section XI, Division 1," which is endorsed by the NRC in Revision 16 of Regulatory Guide 1.147, "Inservice Inspection Code Case Acceptability ASME Section XI, Division 1." Code Case N-460 states, in part, "when the entire examination volume or area cannot be examined due to interference by another component or part geometry, a reduction in examination coverage on any Class 1 or Class 2 weld may be accepted provided the reduction in coverage for that weld is less than 10%."
NRC Information Notice (IN) 98-42, "Implementation of 10CFR50.55a(g) Inservice Inspection Requirements," termed a reduction in coverage of less than 10 percent to be "essentially 100 percent." IN 98-42 states, in part, "The NRC has adopted and further refined the definition of "essentially 100 percent" to mean "greater than 90 percent." This methodology has been applied to all examinations of welds or other areas required by ASME Section XI.
- 4. Impracticality of Compliance:
The examination of the subject component weld is limited by the presence of four 24"x24" Steam Generator support pads and seventeen 2.5"x2.5" welded pads (See attached sketch). The examinations were conducted in accordance with procedure TX-ISI-210, "Ultrasonic Examination Procedure for Welds in Ferritic Steel Vessels." Straight beam (00) and angle beam (450 shear and 60' longitudinal) scans were used to achieve the weld volume obtained. As shown on the attached examination data sheets the 00 and 450 exam angles were both limited to 22% not examined, and the 600 exam angle was limited to 31% not examined. Taking the worst case limitation this corresponds to a coverage of 69% of the required examination volume.
to TXX-14103 Page 2 of 11 10CFR 50.55a REQUEST NUMBER B-7 RELIEF REQUESTED IN ACCORDANCE WITH 10CFR50.55a(g)(5)(iii)
- INSERVICE INSPECTION IMPRACTICALITY
- 5. Burden Caused by Compliance:
The design configuration restrictions of the subject component makes the Code required examination coverage requirements for the weld volume impractical. Plant modifications or replacements of components designed to allow for complete coverage would be needed to meet the Code requirements. This would cause considerable burden to CPNPP.
- 6. Proposed Alternative and Basis for Use:
Proposed Alternative:
The following alternatives are proposed in lieu of the required examination coverage of essentially 100 percent:
- 1. Ultrasonic testing (UT) of the subject component weld was performed to the maximum extent practical during the second ten-year interval.
- 2. Pressure test VT-2 visual examinations were performed, as required by Code Category B-P, during the second ten-year interval. No evidence of leakage was identified for this component.
Basis for Use:
The basis for use of this alternative is that it provides the best examination coverage practical within the limitations of the current configuration. Based on the percentage of the examination volume completed and the lack of any indications identified, there is a high level of confidence in the continued structural integrity of the weld. CPNPP believes that there is no undue risk to the public health and safety presented by this request.
- 6. Duration of Proposed Alternative:
The second ten-year ISI interval for Unit 2 began on August 3, 2004 and ends on August 2, 2014.
- 7. Precedents:
Comanche Peak Nuclear Power Plant, Unit 2 First Inspection Interval Relief Request B-5, "Steam Generator Tubesheet-to-Channel Head Welds," as approved by the NRC in ADAMS Accession No. ML012490192 Comanche Peak Nuclear Power Plant, Unit 2 First Inspection Interval Relief Request B-14, "Steam Generator Tubesheet-to-Channel Head Welds," as approved by the NRC in ADAMS Accession No. ML051670284 to TXX-14103 Page 3 of 11 10CFR 50.55a REQUEST NUMBER B-7 RELIEF REQUESTED IN ACCORDANCE WITH 10CFR50.55a(g) (5) (iii)
- INSERVICE INSPECTION IMPRACTICALITY Weld Profile Page 1 of 2 to TXX-14103 Page 4 of 11 10CFR 50.55a REQUEST NUMBER B-7 RELIEF REQUESTED IN ACCORDANCE WITH 10CFR50.55a(g) (5) (iii)
- INSERVICE INSPECTION IMPRACTICALITY Weld Profile Page 2 of 2
x 0).-,-
~4 ,-r 0 0
-3 0
0
~1*,
WELD 2 REF.2-11001 Z
z U) >
m r) r)
EIaU['- (!IR&T !UI UAoou& AJjIj I1ISI0 AflOJS z Z 11 HOTSIDE 1-81TO1-816 I (1) r)
COLOSIOE I-Bir IQ 3-632 Is 'o tri m
ITS 2 2-1 RDTSIDE 2-SI TO2-616 2A (COLSIDE 2-617 702-232 26
=10 m 3 - NTID -10T 3-016 3.1 Z A c-, ýr 3 -1 COLIISIDE 3-BIT To 3-832 36 CD rfl r) cn HUTTIDE 4-Bi TO4-BI6 41 oil A 4.1 z rim COLOI.301 4-BIT 10 4-032 48 En
> P r) aq w t-4 "q
iauST6ilIOE USEOR~T DESCRIPTION: STEAM GEN3ERATORS 1.2,3 &4 TU ELECTR IC NOTES: (TUBESIDE) 5.3'/SA-508 (HEADSIoE) 5.3/SA-216 CPSES UNIT 2 (BOLTING) 1.875' D0A./I6.II LENGTH INSERVICE INSPECTION LOCATION ISOMETRIC
- -,%inn FAPPýRO:VAL: IT fir Q -
X>
PDI Calibration Data Sheet Plant I Unit CO.ANCHE PEAK UNIT2 DataSheet# 10UT-18A SO- -- 4 L ed /-s Company WESDYNE Page L of.
Comp / System STEAM GENERATOR 2 60 - L60----
Procedure No. TX-ISI-210 :Cal. Checks Time o Rev / Chng. No. 6 / N/A Initial Calib. 0750 40 7111 Cal. Block No. TBX-28 Initial Calib. Date 4112108 /
Cal. Block Temp 750 Comp. Temp 800 Intermediate NIA ze -- 20--
Therm S/N: TU-2261 Intermediate N/A, Size N/A Sch. N/A "I" Final Calib. 1216 / >
7X Ferrilic r'"lAustenl[Ic Final Calib. Date 4112108 0 2 4 b o 01 )
CRT Div.= .904" CRT Div. 0 IT8 Cal. Direction: Axial Circ. Both Couplant r)
Scan Area: .L- to Weld Type: ULTRA GEL II Search Unit #1 Sea Unit0#2
= to Weld Batch: 06225 Manufacture: KBA Manufacture: I M M Serial No.: 01COX2 Freq.: 2.25 MHz Serial No.: Freq.:
Recordable j Size: 1.0" Shape: ROUND Size: hape: 10 Access I Indications j Exam Sens. Exam Angle 0° Model: GAMMA Exam Angle Model: 0 Z 10 n.
Examination Area / Weld J~Yes__
I No eorn1 Measured Angle: 0° Measured Angl -- U)
TCX-1-3100 " 2-1 . ,27.0 dB Wedge Style: N/A Wedge Style:D Soire..h Unit Cable S rch Unit Cable Type: RG 58 A/U Type:
Length: 20' No. of Connectors 0 Length: No. of Connectors >
Remarks I Reason for Incomplete Scan(s) Instrument Settings I strument Settings ( M Make / Model: KBA / USN 52R Make / Mo el: _ w_
22% NOT EXAMINED Serial No.: 102282 Serial No. >
Dis.Delay: 1.227 ps Range: 9.037 Dis.DL.a -Range:
SEE LIMITATION SHEET Prb.Delay: NIA ps Pwidth: NIA Prb.Del: Ps Pwidth:
M'tl CalNet: .2315 .Is Pulser SINGLE M'tl Cal et: ps Pulser COVERAGE TAKEN FROM PREVIOUS DATA Damping: 1000 Q Reject: 0% Dampi g: 0 Reject:
Rep. Rate: AUrro0HIGH Freq.: .3-4 Rep. ate: AOHIGH Freq.:
Filter: N/A Mode: N/A Filter. Mode:
Voltage: N/A Rectify: FULLWAVE Vol ge: __-- Rectify: FULLWAVE Examiners: WALLACE REID Level II Date 4/12108 Reference Sensitivity (Sens.) Re rence Sensitivity (Sens.)
Axial: 13.0 dB Circ: N/A al: Circ:
Examiners: NIA Level N/A Date NIA SDH Sensitivity: N/A HSensitivity:
luitner Evaluation Required? Fl Yes [Z] No Rouiaewr J atec~ e-( 2 .~ 0g
rT1 ~t>
PDI Calibration Data Sheet rbr I. 00 0
Plant / Unit COMANCHE PEAK UNIT 2 Data Sheet # 10 UT-18B Company WESDYNE Page 2 of )F 60 00 OQ Comp / System STEAM GENERATOR 2 (0 Procedure No. TX-ISI-210 Cal. Checks Time 40 0 w Rev / Chng. No. 6 / N/A Initial Calib. 0755 Cal. Block No. TBX-28 Initial Calib. Dale 4/12108 I *i7 Cal. Block Temp 75" Comp. Temp 80" Intermediate N/A 20 Therm SIN: TU-2261 Intermediate NIA Size N/A Sch. NIA 7T Final Calib. 1220
[CDrerition: Aial*t.nitir. Final Calib. Date 4112/08 2 4 0 8 rim 0
CRT Div. = 1.297" Cal. Direction: Axial Circ. X Both Couplant >-
Z Zrf L Scan Area: . to Weld Type: ULTRA GEL II Search Unit #1 rEl "Z j
.L to Weld Batch: 06225 Manufacture: KBA Manuf,
,Serial No.: 01BXV9 Freq.: 2.25 MHz Serial I Recordable Size: .5" X 1.0" Shape: RECTANGLE Size:
Access Indications Exam Sens. Exam Angle 45" Model: GAMMA Exam j Examination Area / Weld ' Yes No Geom Measured Angle: 45 " Measu TCX-1-3100 2-1 2-SIDED X 50.0 dB Wedge Style: SWS Wedge Z ZI Search Unit Cable Type: RG 58 A/U Type:
Length: 20' No. of Connectors 0 Length > n Remarks / Reason for Incomplete Scan(s) Instrument Settings '
Make ( Model: KBA - USN 60 SW Make 1 22% NOT EXAMINED Serial No.: 105419 Serial I Dis.Delay: 1.077 ps Range: 12.97 Dis.Del SEE LIMITATION SHEET Prb.Delay: 8.5034 ps Pwidth: 330 ns Prb.De MIt CalNet: .1246 ps Pulser 'SQUARE M'tl Ca COVERAGE TAKEN FROM PREVIOUS DATA Damping: 500 (1 Reject: 0% Dampi I Rep. Rate: AUTOHIGH Freq.: 2.25 MHz Rep.
Filter: N/A Mode: SINGLE Fille.
Voltage: 450 Rectify: FUU.WAVE Vol gE Examiners: II Date 4/12/08 Reference Sensitivity (Sens.) R erer Axial: 36.0 dB Circ: 36.0 dB A/ial:
Examiners: NIA Level N/A Date N/A SDH Sensitivity: N/A - DH Si ty:
Further Evaluation Required? [1 Yes [1 No wt5kff Aut~er )L p-ot 111
rTI WESTINGHOUSE NUCLEAR SERVICE DIVISION INSPECTION SERVICES BEAM SPREADS C C
C r)i m rri 03
X PDI Calibration Data Sheet ['T Plant I Unit COMANCHE PEAK UNIT2 Data heet# 1OUT-18C o I 03' 10 Company WESDYNE Page Comp / Syslem STF-AMENE4ATOk 2 Procedure No.
Rev / Chng. No.
TX-ISI-210 8I N/A Cal. Checks Initial Callb.
Time 0800 -Ar. 1 I----- 40__' 0}
I Cal. Block No.
Therm SIN:
TBX-28 Cal. Block Temp 75" Comp.jTemp 80.
TU-4261 Initsal Calib, Date 4112108 Interm ediate Interm emdiate N/A WITA 20 - . 20 t
Size NIA Sch. NIA IT' Firnal Calib. 1230 .
jX Ferritlc -Au~tenltic Final Calib.ate 4112108 0 2 4 6 8 0 2 4 8 CRT Dlv. - 1.48" CRT Dlv. 0 Cal. Direction: Axial Circ. X Both Couplant Scan Area: -L to Weld Type: ULTRA GEL II Search UnIt #1 Search nlt#2 to Weld Batch: 06225 Manufacture: KBA Manufacture: . l/
Serial No.: 01BXVB Freq.: 2.25 MHz Serial No.: r eq.: 1-d tTIl
. . Recordabhle Size: .5" X1.0" Shape: RECTANGLE Size: . Shape:
Access indicationns Exam. Sons. Exam Angle W0* Model: GAMMA Exam Angle ._ Model:
Examination Area /Weld I_ Yes No C Geom _ ._ Measured Angle: 600 Measured Angle*
TGX-1-3100 2-1 124IDED!
~ 59.0 dB Wedge Style: SWS Wedge Style: __
0['I Search Unit Cable Se rch Unit Cable I I Type: RG 58 A/U Type: l- l)'T I_ _I Remarks I Reason for Incomplete Scan(s)
I I Length: 20' No. of Connectors Instrument Settings 0 Length: __/. No. of Conncctor IMtrument Settings Make I Model: KBA / USN 60 SW Make / M el:t
%1NOT EXAMINED Serial No.: 105420 Serial No., _ _ _ _
Dis.Delay: .&35 p3 Range: 18.48 D0s.Dela . Range:
SEE LIMITATION SHEET Prb.Delay. 14.8894 P8 Pwdth: 220 ns Prb.Del : psPwidth:
MU Cal/Vet .1270 ps Pulser SQUARE 1iI Cajet: ps Pulser COVERAGE TAKEN FROM PREVIOUS DATA Damping: 500 0 Reject 0% Damp' g. 0) Reiect:
Rep. Rate: AUTOtIG* Freq.: 2.25 MHz Rep. ate: AUTO*GH Freq.:
Filter: N/A Mode: SiNGLE Filt : _ -Mode:
Voltage: 453 Rectify: lLw"-A*Vc Voll get Rectify: ruuWAVE Examiners: _____________ Level____ Date 4/12108 Reference Sensilivilty (Sons.) Refe'ence Sensitivity (Sens.)
Axial: 45.0dB Circ: 45.0 dB A*iaN: Circ:
Examiners: N/A Level NIA Date N/A SDH SenslUvity: NIA *H Sensitivity:
F*Oter Evaluaton Required? j] Yes IT -o Rýitwwicaw S;Z-ý9 vfirlo ý "" D!a 4,o7r ?Ri -_ A0110.
WESTINGHOUSE NUCLEAR SERVICE DIVISION 0z o ~
INSPECTION SERVICES REPORT NO. 10 UT-18C BEAM SPREADS PAGE OF 0<
-s 5-.
5-5 0
H PLANT COMANCHE PEAK UNIT II PROCEDURE TX-ISI-210, REV. 6 0
TRANSDUCER S/N 01BXVB ANGLE 60' SIZE .5"X 1" FREQUENCY 2.25 MHz CAL. RLOCK TBX-28 THICKNESS 5.45" (A EXAMINER CAREY LASOYA DATE 04/11108
/
0
~9O 6/0 0 s~ 65.6-0 ST10
- cn SURFACE DIST. FORWARD MAX BACKWARD 114 T 2.00 2.45 2.90 1/2 T 4.20 4.90 5.80 3/4 T 6.50 7.40 8.45 to TXX-14103 Page 11 of 11 10CFR 50.55a REQUEST NUMBER B-7 RELIEF REQUESTED IN ACCORDANCE WITH 10CFR50.55a(g) (5) (iii)
- INSERVICE INSPECTION IMPRACTICALITY Exam Report Page 7 of 7 WESTINGHOUSE NUCLEAR SERVICES DIVISION P-0 -e ,
LIMITATION TO EXAMINATION PLANT COMANCHE PEAK UNIT 2 SKETCH TCX-1-3100 REV 1 SYST.ICOMP. STEAM GENERATOR 2 PROCEDURE TX-ISI-210 REV. 4 EXAMINER ý 1q&,*?--
- 4 - DATE 1 i-. 8-97 RELATED TO: UT X PT MT IDENT. NO. 2-1 PROVIDE GENERAL INFORMATION TO DESCRIBE APPROXIMATE SIZE. LOCATION AND TYPE OF UMITATION.
FOUR 2A" X 24" SUPPORT PADS RESTRICTES ALL SCAN FOR 22%
SEVENTEEN 2.5" X 2.5" WELDED PADS APPROXIMATELY 7- FROM THE CENTERLINE LIMITS 60' SCAN SUPPORT COLLAR LIMITS 60" SCAN 0' - 22% NOT EXAMINED 45* - 22% NOT EXAMINED 60 - 31% NOT EXAMINED 31% OF REQUIRED EXAMINATION VOLUME NOT EXAMINED I SEE I.MITATION AND WVELD PROFILE EXAMINATION DATA SHEET w [
v to TXX-14103 Page 1 of 14 10CFR 50.55a Request Number B-12 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
- 1. ASME Code Components Affected:
ASME Code Class: Code Class 1
References:
ASME Section XI, Table IWB-2500-1 and IWB-3510 Examination Category: B-B Item Number: B2.40
Description:
Code required examination coverage for the weld volume is impractical Component: Steam Generator 2-01 Head-to-Tubesheet Weld TCX- 1-3100-1 -1 Component Number: TCX-RCPCSG-01
2. Applicable Code Edition and Addenda
ASME Section XI, 1998 Edition through 2000 Addenda.
3. Applicable Code Requirement
ASME Section XI 1998 Edition through 2000 Addenda, Figure IWB-2500-6 (Design B) requires a minimum volumetric examination of the weld volume extending 1/2t into the base metal on both the head side and tubesheet side of the head-to-tubesheet weld (Code Item B2.40).
Comanche Peak Nuclear Power Plant (CPNPP) Unit 2 second ten-year interval Inservice Inspection Program Plan also implements Code Case N-460, "Alternative Examination Coverage for Class 1 and Class 2 Welds,Section XI, Division 1," which is endorsed by the NRC in Revision 16 of Regulatory Guide 1.147, "Inservice Inspection Code Case Acceptability ASME Section XI, Division 1." Code Case N-460 states, in part, "when the entire examination volume or area cannot be examined due to interference by another component or part geometry, a reduction in examination coverage on any Class 1 or Class 2 weld may be accepted provided the reduction in coverage for that weld is less than 10%."
NRC Information Notice (IN) 98-42, "Implementation of 10CFR50.55a(g) Inservice Inspection Requirements," termed a reduction in coverage of less than 10 percent to be "essentially 100 percent." IN 98-42 states, in part, "The NRC has adopted and further refined the definition of "essentially 100 percent" to mean "greater than 90 percent." This methodology has been applied to all examinations of welds or other areas required by ASME Section XI.
to TXX-14103 Page 2 of 14 10CFR 50.55a Request Number B-12 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
- 4. Impracticality of Compliance:
The examination of the subject component weld is limited by the presence of four 24"x24" Steam Generator support pads and seventeen 2.5"x2.5" welded pads (See attached sketch).
The examinations were conducted in accordance with procedure TX-ISI-2 10, "Ultrasonic Examination Procedure for Welds in Ferritic Steel Vessels." Straight beam (00) and angle beam (450 shear and 600 longitudinal) scans were used to achieve the weld volume obtained.
As shown on the attached examination data sheets the 0' and 45' exam angles achieved 78%
examination coverage, and the 600 exam angle achieved 69% examination coverage. Taking the worst case limitation this corresponds to a coverage of 69% of the required examination volume.
- 5. Burden Caused by Compliance:
The design configuration restrictions of the subject component makes the Code required examination coverage requirements for the weld volume impractical. Plant modifications or replacements of components designed to allow for complete coverage would be needed to meet the Code requirements. This would cause considerable burden to CPNPP.
- 6. Proposed Alternative and Basis for Use:
Proposed Alternative:
The following alternatives are proposed in lieu of the required examination coverage of essentially 100 percent:
- 3. Ultrasonic testing (UT) of the subject component weld was performed to the maximum extent practical during the second ten-year interval.
- 4. Pressure test VT-2 visual examinations were performed, as required by Code Category B-P, during the second ten-year interval. No evidence of leakage was identified for this component.
Basis for Use:
The basis for use of this alternative is that it provides the best examination coverage practical within the limitations of the current configuration. Based on the percentage of the examination volume completed and the lack of any indications identified, there is a high level of confidence in the continued structural integrity of the weld. CPNPP believes that there is no undue risk to the public health and safety presented by this request.
to TXX-14103 Page 3 of 14 10CFR 50.55a Request Number B-12 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
- 6. Duration of Proposed Alternative:
The second ten-year ISI interval for Unit 2 began on August 3, 2004 and ends on August 2, 2014.
- 7. Precedents:
Comanche Peak Nuclear Power Plant, Unit 2 First Inspection Interval Relief Request B-5, "Steam Generator Tubesheet-to-Channel Head Welds," as approved by the NRC in ADAMS Accession No. MLO 12490192 Comanche Peak Nuclear Power Plant, Unit 2 First Inspection Interval Relief Request B-14, "Steam Generator Tubesheet-to-Channel Head Welds," as approved by the NRC in ADAMS Accession No. ML051670284 to TXX-14103 Page 4 of 14 10CFR 50.55a Request Number B-12 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Profile Page 1 of 1
C:)
0-4 01 I-J 9.I W
COLIISIE 1.817T 16-622 is j .I&n-E.
HDIIISIDE Z-8.10 2.0.4 COLDSIOG MIT1 10 ?-832 28 COLOSIDt 3-817io 3-632 2 I., 1210TSD 4-91T 10-6IG 4A /
021E OLD 4-01? TOA-832 48 BQLIIK
- 8011mG I
P/ZL
wv -
~IWESDynl Calibration Data Sheet Plant I Unit COMANCHE PEAK UNIT 2 Data Sheet 9 12 UT-017A F 0 Company WesOyne International Page I' of /0 Como I System STEAM GENERAT'OR C)
Procedure No. TX-ISI-210 Cal. Checks Time Rev/ Chng. No. 710 CJ Cal. Block No. TBX-28 Initial Calib. 0808 Cý Cal. Block Temp. 83 °F Thermometer S/N: IC - 1454 Initial Calib. Date 04108/11 Size 19 L X 6 W X5.45 T Sch. N/A M Ferritic M Auslenitic Intermediate 1320 hi.- 4 G 2 Search Unit #1 Search U it #2 Each Major CRT Div. z 1.428" Intermediate N/A Manufacture: KRAUTKRAMER Manufacture:
Serial No.: 0IBXV9 Serial No.:
Cal. Direction: IDAxial [] Circ. [] Both No. of Elements: 1 No. of Elements:
Final Calib. 1655 Size: .5 x 1.0" Shape: RECT.
U1 Size: Shape:
Scan Area: .._ o Weld Freq. 25 MHz Style: GAMMA Freq. Syle:
Final Calib. Date 04/08/11 CD toWeld Exam Angle: 60 ,IMode:SHEAR Exam Angle: Mode:
Calibration Reference Check: Couplant Measured Angle: 60° Measured Angle: I n U,
Rompas Block: # 104874 Ref. Reflector: SDH Type: ULTRAGEL I1 Wedge Style: NON INTEGRAL Wedge Style: CD Batch: 06225 Search Unit Cable An Cable Recordable Exam Access Indications Type: RG 174 Type: RG 174 Examination Area / Weld Yes No Geom Length: 12' No. of Con.: 0 Length: No. of Con.:
el TCX-1-3100 1-1 BOTH X 75 dB Instrument Settings I strument Settings Make / Model: KRAUTKRAMER USN 60SW Make / Mo el: KRAUTKRAMER USN 605W Serial No.: SAP 105205 Serial No.
Probe Delay: 15.8003 Range: 14.28 Probe 0 ay: __ Range:
MIlCal/ Vet: .1266 Pulser: SQUARE MIlCal Vet: _ Pulser:
Damping: 500 0 Reject: 0% Dampi : 0 Reject:
Remarks / Reason for Incomplete Scan(s) COMPONENT TEMP: 95*F PRF: AUTOHIGH Freq: 2.25 MHz PRF: IAUTOHIGH Freq:
Filter: FIXED Mode: P/E Filler: - Mode: P/E 69% EXAMINATION COVERAGE ACHIEVED Rectify: rULLWAVE Voltage: 450 Recti y: Vnllage:
Pulse Width: 220ns Puls Width:.--
Examniners: TOMAZ ,,DRIH 11 V'..-- Level II Date 04/08/11 Reference Sensitivity (Sens.) Ref rence Sensitivity (Sens.)
N/A Level N/A Date N/A Axial: 63.5 dB Cire: N/A Ax 1: Circ:
SDH Sensitivity: 47.6 dB S HSensitivity:
Reviewers: Further Evaluation Required? r-vYes M ojN CRT Div./SOH 1.1 RT Div./SOH V--1 44 UIh T. l. -VL to TXX-14103 Page 7 of 14 IOCFR 50.55a Request Number B-12 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Report Page 3 of 10
-a w DspynF Calibration Data Sheet Plant, Umnt COMANCHE PEAKUNIT 2 Data Sheet/# 12 UI-Ot1B Company WesOyne Irterrational Page .- Iu Comp / Syslrrm STEAM GENERAIOR Praucmed tin TX.IS!-210 Rev I Chlig o 7It0 Cal. Checks Time r Cal Bod No. _ 8X.28 Initi Cat:b 0811 CatBock remp. 83 'F Ri*,emn uelme SN IC- 1454 tn~iaCa':b Dale 04108/11 I
Sze 19LX6W X5.45 T Srh. wA Intermediate 1300 E Fcri. r-IAusteviic Search Unit #1 Eac* bla,ouCRTriv .963,3' Manufactroe: KRAUTKRAMER Ine'rnediate KIA Serial Nu. O1BXW7
..a Dieivn E ]Aal [] Cc E] Both Iroa,Cathb 1655 No. cf Elements: Noa. of Elemnents:
S'ze. 1X.50 Shape: IECI. Size. Shape:_____
Area Iai oWve.d MX :indlCa.b Da'e 0C0811I Freq. 225 MHz Style. GAmIMA ExamAnge: 45" Mode-lEAR Enram Angle. Mode:
,abya'.nn Rclerence Check. Couplant Measured Angle: 45' Measured Angle-1,vr'as 6 ocit 104874 Rel Reflec.or: SOX TýlTr ULTRAGELII Wedge Stl*e: NON INTEGRAL Batch 06225 Search Unit Cable Recordable Exam Access Indications type tIC I BNC Sens.
E hamnaton krea Wold Yes I No I Geom Lengh: 1Z NO.of Con.: 0 Length No. of Con.:___
TCX-1-310( I-" BOTH X e3dB Instrument Settings strument Settings Make I Model: KRAUfKR.IMER USHtS8. Makte I Moet,KRAUTKRAMrER USN66OSW Seua, No.. SAP 10439' Probe Delay 22712 Range 9.633 ProbeD y __ Range: __
M' Call Vet .12W4Pulser: SQUARE MUalYe. ____Pulser:____
DampIrg 500 Rej*ec: C%
Remarks I R.a~on [crIneomplele Scar(s) CO!.'POl*Elfl IE.P 95'F PRF: AUT OHIGH Freq: 2.25 MHz PRF:AUTOH5G-H Freq____
0' TO 135' AND 315" TO 0' SCANNED Filter F'XED Mode: D/E Filler._____ Mode: PE 78% EXAMNATION COVERAGE ACHIEVED Rectily: F.iUwAvEVoltage: 450 Rect, Y: _ ___Voltage:___
PuLse Wid:h. 220ns Reference Sensitivity (Sens)
E1o"'i..c JENJRW1 4= Level 11 D3le 04108ull Refrece Sensitivity (Sens.)
NIA I eVe)w N/A Date NIA Ax!at: 56 dB COrc. IIIA Am1:__ _ C/to __
SDIl Senrovtly 40TB0 HSensitreuy I _________
Re~.e~rr~ F.1k~rE uaWtnReýLed' M Y.e M~NO CRT DivJSDH 1.1 TTDivJSDH REMWER 4 DAIE f (/
to TXX-14103 Page 8 of 14 10CFR 50.55a Request Number B-12 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Report Page 4 of 10 WEsoyln .
Calibration Data Sheet Fort U, r t COMANCHE PEAK UNIr 2 Data Shect 9 12UTO17C I.
Company WesDyne Interroetna; Page 2 of 10 Comp i Sys'nm STEAM GENERATOR F,ocedure Nto X-ISI-210 Cal. Checks Time Revi Cling Nto 710 Ca!. SWccv No TBX-28 IniliaCati,. (830 Cal Bltck Temup 83 IF Thrm.rrrmeer SN IC. 1454 1n65i1tCalb Date 04.I8/11 Size 19LX6WX5.45T Sch. N.,A ED Ferr.t Auster,' Ic Inlto ediate 1315 Search Unit #11 Search U it #2 EMah r CRT Div 9428" Inter',ediale NIA Manufacure: KRAUTKRAAIERManufaclure:
Serial No. 0IBXvB Serial No-Cal Orecton []AxioI M Crc. 0 Both No. of Elements: I No. of Elemenets.
Final Ca'ib 1645 Size: 5X1.0" Shape'RECT. Size. Shape:
Scan Area JMo Weld Freq, 2.25MI-z Stlole; GAKAIA Freq. _ Syte.
Final Calib Dale 04,08111 11 toW~e~d Exam Ange- 45 -Mode: -SHEAR Exam Anle. Mode:
Ca'bra'on RefEerce Check. Coupfanl Measured Angle 45* Measured Angle:
Rorrmxs Bock' 104874 Re! Retector SOH Type: ULTRAGEL II Wedge Sitl: NONINTEGRAL Wedge Slye*.
Bad(h: 00225 Search Unit Cable We at Cable Recordable Accesss Indications Type BNC Type RG 174 Yes No Geom Sns. No. of Con.:
Exam nat on Area I eld Length: 12' No. of Con.: 0 Length: /
TCX-1-3100 I-1 BOTH X 67.4 dB Instrument Settings strument Settings Klakei Model. KRAUfKRA.IERIUSI 581 alake I M .e Serial No.: SAP 10476E, Serial No _ _ _
Probe Delzy: =2212Range. 9.428 ProbeD ay Range' NItlColtI Vat: .1262Putner. SQUARE IJ.llCal Vet PuhLer:
Dam~anq 566 Reject: 3% aOampi I) Rejet __
Remarks 'Rason for Incomple'e Scan(s) CO,!PONPeIT TEMIP. %IF PRF-AUTOHIGH Freq' 2.2i ltila PRF: AUTOHIGH Frog:
135' TO 315' SCANNED Fi~tel: FIXED Mode. PIE Filter: Mode. PE 78% EXAMNI'ATION COVERAGE ACHIEVED ReeIly RILwAvE Voltage: 450 Recti _ Voltage:
PulsiefWIh: 220iis Pu WidthJ Reterence SentsitieitySeas.) Ret*rence ens!vly (Sens.)
WA Lacl NTA-Date N/A M~al, 57.4OH Circ: IV/A Ax *:; Circ.
SDHl Se*l7 Ty 42.4 dS SRT ScnOtivityH Rev rvrs FitrorE-.aWea'or Reqic4? [lYe, [ONDt CRT Otv./SDH NA TOriv./SDH VEY EWEIfA - Xu, to TXX-14103 Page 9 of 14 10CFR 50.55a Request Number B-12 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Report Page 5 of 10 Calibration Data Sheet
ýlar! IUril C0OMANCHE PEAK UNI 12 Data Sheet 4 12 UT7417D
'Orr81), WesDyne ltiemnuIona! Page q__ of ik.
COTp 1%S512m STEAMI GEIIERATOR PracedureM toX ISI-210 Cal. Checks Thie Re; IChng No. 713 Calffodt No TOX-28 nial Caib 0/45 Cal. 8,U6 Tend. 83'F iteirrrsrreter SiN C-1454 Inital Caib Date 04M81l1 Size 19iX6W 1(5.451 Sch NIA
[J FerrAt.-
Eah"p CR1 Div f
.67W6 Interrefte 1310 Manufacture: KRAUT:RAMER fIaru!acUe Ilnterned~ate IlfA Seriat No:- 0 Tai( l. .4fisen No.
ZlCCV'ecer, E mAa'n E Circ0 Both No. of Elenie I No. of Elements:
FnaiCatb, 1m0 Szee 1.0' Shape: ROND Size. Shape.___
3(vn A'ea 10Weld f Final Calb. Date 04/.8/i 1 Freq. 225 MHzStyle: GAMMA Freq. S e:
Exarn Anqe. 0 Mode. -STRIAGHi Exam Ang'e: Mode:
?ntmljon RF'erete Chrck Couplant Measured Angle:
R"mPas BlocK i N/A Re' Reecc. NIA Type ULTRAGEL I Wedge Style: . NtA 0 ' Wedge Sty~e Bath: 06225 Ieawued A rgleens Search Unit Cable Sear Cable Recordable Access Indications I : type RGU174 _ Type. RG174 Erxiam,,tfnAtea,'We'd Yes No Georno n LeNo: 6E No. o Con.: 0 Lengt e No. of Con.:
TCX-l-3100 1-I BOTH X 30dB Instrument Settings I stiument Settings Make IMlodel: OlrKRAUT(RaER usiN TOsf Make/1Mo el:KRAUTeNIAER USCI&Osv Seriat NO.: SAP 105421 SOWaNo _______
Probe Delay. .5212 Range: 6.706Probe a._ Range.
MU/ICallVe. .2304 Pulsei: SOVARE M1t CalVel-____Rser:____
DamoIn: 5000 Rejec: 0% Damp, . (3 Rqeicl:
Re-nar~s R*eRIcrInce*rz'*ee Scn(s) COYPONENI TE!P 05SF PRF: AUTOHIGH 2iz Freq: 2.25 PRF:AUTOHIGH Freq.
Fil.er. FIXEDMode: P/K Fitera _,*__ _ Mode PIT 78-% EXAM NAIION COVERAGE ACHIEVED Rectity FuLLwAvE Voltage- 450 Ret . e Voltage:
Puse Width 220ns PulsWidth:
S __e Reference Sensitivity (Sens) RefenceSesitimety (Ses)
K'A CLeIj NIA Date NIA Axial: 10.1dB NA 5 2rc 1: I SDHSensititily; IMA S HSenfliviiy: _______
Rra.iame~ Fehrlva'.21onRequiend? M1.e% jmjt ORT Div JSDH50 A FITO DaRJSI d tEIMSATE h~1~
to TXX-14103 Page 10 of 14 10CFR 50.55a Request Number B-12 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Report Page 6 of 10 IwEspyfl Calibration Data Sheet Pvt.,UxI COMIANCH~E PEAX UNIT2 Da!a Sheet 9 12UT4I1E Ccmpany Wes Dyno hlereonalora Papg 5 of Comp ISsvsem STEAM 5ENERATOR Proceduwe IIo TX4Sc1210 Cal. Checks TIme Rey ICln gýlo 710 Cal810act D. IBX.20 ntia Ca!b. 1,147 Cad'8'xc/ Temp 837~
Ihermrollrner SA IC-1454.
lnit,a Calib. Date *t S-re 19LX6WX.45T -Snr. RIA I Ferrili, Aus1e~i~ Internediate IVA Search Unit#1 Ea~r.il~rCR-Doj z 1428" Manufacture: KRAUTKRAIER Manufacture:
Interned6ate IVA Serial No.: 01BXV9 Ca. A)aM [] CGrn Bo~h IDena~ No. of Elemen-s: 1 No. of Elements:
FinallClb. 1445 Size: .5x1.0' Shape: RECr.
SranArea jj.vet lj Freq. 2.251,1Hz Style: GAMMNA F:na'C.b Dale to Wxeld ExamJgle: 60o'Mode: SHIEA.R Exam Aole: Mode:
Ca'bratltn Reference Chek Couplant Measured Angle- 60" Mleasurod Angle.~l RorpaS Bbok' IC4874 Ref Refectcr SOH Type ULTRAGEL II Wedge Slyle. NON INTEGRAL Wedge Style.
BatcO: 06225 Search Unit Cable FraeqItec. t~A1t~E S NO!
Recordabloe EXm Access Indications Type: RG 174 Exa*r nav'r Areal ','Ve'.JI Yes INo fGoomI n.
Len~h: 12"NoolCon.: 0 LeNh I No.0of Con.:
TCX-i-31CC 1t BOTH X 75 dB Instrument Settings I strument Settings Make I Model. KRAUTKAER USN OOS' TPer. RGMoe it7 Selal No.: SAP 105205 Probe Delay: 15.m3RaRge 1428 ay __Range ebProbe0 MTCall Vel' .1266 1 ,31 r.s SQUARE Cal Vet:
CM0 Patscr:____
Damping -OA0 Re/ed: 0% DWdam S N l lenti~ Re*ed:
Settings Remais ,Reson for Ircomr'ene Scar(s) - COJPONEWI TEMtP IF PRF: AUTCIIGH Freq: 2.25 MHz Frog:.
Fillr: FIXEDMode PIE RIRed
'yAUTOHIGH 69% EXAN,1AT ION COVERAGE ACHIEVED Ret~ly: RFLLLMAV Voltage: 450 IPIRF: _ _Vottage:
Pulse Widit: 220rs Einmrprs .15il BELL Aý, .i_&' LnetIre D1_ate .9 f Re!erence Sensitily (Sens.) ReL . Sensth y(Seons)
NrA \J eet N/A Date NIA AAiAt:63.5 dB Circ. N/A SDHN SFni~wVy: 476dB Re~ie.%rs FutherEvaLut~ionflertred? [lyes IjNo CRT Div.ISDH 1. TDiYJSDH REVEfWERICAiO 5 e.§-4 ,/ B~Jot to TXX-14103 Page 11 of 14 10CFR 50.55a Request Number B-12 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Report Page 7 of 10
'w..S.DynE Coveragc&SKETCH
_/"p m r a..# 12 UT-017A
-' L-(0 L Sa~oCOA~ovCM:PFAX Uar..__ Outager 2R,1_1 t-voctxrt v tXISr :FI Rtýrjor,. ;_ -ýr4 VIA sysl~q S'i-tv*j "Nedi A 1- I 60' Of18M'9 8
Omr~R JF-RZLAF.tMFJ -00!1 Data CWOW*tI'1 of rClc% ) _ee~ D4*c ANI ýC-vpw a/ L to TXX-14103 Page 12 of 14 10CFR 50.55a Request Number B-12 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Report Page 8 of 10
-~wE-so nfl Ceoerag"SKETCH 2U T-017H 2ir!r 51ý C-I1-A CH'PF.A< J~iL ', CIjdj . 2R=12 Pi;C-u:C A! -X.1 In R L.Li 7A 7,Sysa-n" m-Ara -. vAtJIUv vVef~iv 1.
45' SIAV Oo8 V,V
-4.77/ 4.-% 3.7 L94 2.54 i eg 1.48 L21 14r-Drcw 0,, ;CR?4C- L 4.
~o~.o* ii _________ DOt. C4f~ld1 7 .1/
Rsi-A-V ____________________________ D.'
D-1 1.%-w r,% tr t or%1 M-n~Cvrý, t4&4-k-/
to TXX-14103 Page 13 of 14 10CFR 50.55a Request Number B-12 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Report Page 9 of 10 n, VIEsDyfnl CouerauE&ASKETCH R5&2 2T-J I" 1TO7 S-cct SLtr co*A&Nhc*. PEnAI Ujnt. 2 l
r.S~ S1IAF.1
- 4SI~u C Ou-+/-L.e r. ZRF1.Z Wel .
P:ccd.re 'jS TXIS-212 -t'or- 7 rac. N, I
3ýM:eý nti-R X\JB I0 a Z ~,'
- 1 3 ~~ .c t.J
/4 ZT D~rwz. Zy XZWII Mk 4szi2aL LEW3 ______ Orei C4jh R,...v LCVel Oa.e
.,rrg . .v"t.
nv -, " r,.,:,i / - I- P .,.,, R ,- ,,
I..rv . : t - - " - 'sp.
to TXX-14103 Page 14 of 14 10CFR 50.55a Request Number B-12 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Report Page 10 of 10 P.EPORT M:) UT-OO-021 vVEST1INGHOUS- NUCLEAR SEVCES DIVISION =AGE 2 CPF ?
LIMITATION TO EXAMINATION TCX.1-210C PLANr Coir iChC ped UNIT 2 SKlET*h TYA-SI.2iC Rmo' 4 FC NJA
,ySrIC,'- REACTOR.COOLANT PROCEDUR.E EXAMAikER M:,ot, W. AfldtiEVE I0'5J700C FXArk1 HER Naloaeek. Wite L-=VE L III DATE CCI*a=>NCN, ID TCX*l.3i00-1-1 RE'ATCD lo tAT PT 0 Jr VT PROViDE 5U *-l*TENT* F0R1CATIO7J TZ D-SCRIBE ZIZE LOCATION AID CF LIMITATi0N OFZ CQP ':G jLE Foul 2s- 4- SUpPOII Pid9 reO~rSM all =.nf Wr =2. 3*veiilCf LI*X 2-9 wedad pads 8aPPro2 LT0 CL bmI~gSW 11"rM.
C* ..2-% "tl C.arnind. 46. .=%pLIot Zaxwnwwo. tit mm
.3.1% no SJ.WtUI. 31 acI0 0 ijii~ clam vOIItvC not1 cammnd.
5Sb=
cD..+/-AR vlý-M ý- I
-- ° L= =
toP'I 1 S139 L1C.EC-fl? n:Z'VEW "tT -U CLEC-r11 LEVIZ V) 0t':? NT: AlJCI: OT to TXX-14103 Page 1 of 14 10CFR 50.55a Request Number B-13 Relief Requested In Accordance with 1 OCFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
- 1. ASME Code Components Affected:
ASME Code Class: Code Class 1
References:
ASME Section XI, Table IWB-2500-1 and IWB-3510 Examination Category: B-B Item Number: B2.40
Description:
Code required examination coverage for the weld volume is impractical Component: Steam Generator 2-04 Head-to-Tubesheet Weld TCX- 1-3100-4-1 Component Number: TCX-RCPCSG-04
2. Applicable Code Edition and Addenda
ASME Section XI, 1998 Edition through 2000 Addenda.
3. Applicable Code Requirement
ASME Section XI 1998 Edition through 2000 Addenda, Figure IWB-2500-6 (Design B) requires a minimum volumetric examination of the weld volume extending 1/2t into the base metal on both the head side and tubesheet side of the head-to-tubesheet weld (Code Item B2.40).
Comanche Peak Nuclear Power Plant (CPNPP) Unit 2 second ten-year interval Inservice Inspection Program Plan also implements Code Case N-460, "Alternative Examination Coverage for Class 1 and Class 2 Welds,Section XI, Division 1," which is endorsed by the NRC in Revision 16 of Regulatory Guide 1.147, "Inservice Inspection Code Case Acceptability ASME Section XI, Division 1." Code Case N-460 states, in part, "when the entire examination volume or area cannot be examined due to interference by another component or part geometry, a reduction in examination coverage on any Class 1 or Class 2 weld may be accepted provided the reduction in coverage for that weld is less than 10%."
NRC Information Notice (IN) 98-42, "Implementation of IOCFR50.55a(g) Inservice Inspection Requirements," termed a reduction in coverage of less than 10 percent to be "essentially 100 percent." IN 98-42 states, in part, "The NRC has adopted and further refined the definition of "essentially 100 percent" to mean "greater than 90 percent." This methodology has been applied to all examinations of welds or other areas required by ASME Section XI.
- 4. Impracticality of Compliance:
to TXX-14103 Page 2 of 14 10CFR 50.55a Request Number B-13 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
The examination of the subject component weld is limited by the presence of four 24"x24" Steam Generator support pads and nineteen 2.5"x2.5" welded pads (See attached sketch).
The examinations were conducted in accordance with procedure TX-ISI-2 10, "Ultrasonic Examination Procedure for Welds in Ferritic Steel Vessels." Straight beam (0°) and angle beam (450 shear and 600 longitudinal) scans were used to achieve the weld volume obtained.
As shown on the attached examination data sheets the 00, 450, and 600 exam angles all achieved 77.5% examined. Therefore, this corresponds to a cumulative exam coverage of 77.5% of the required examination volume.
- 5. Burden Caused by Compliance:
The design configuration restrictions of the subject component makes the Code required examination coverage requirements for the weld volume impractical. Plant modifications or replacements of components designed to allow for complete coverage would be needed to meet the Code requirements. This would cause considerable burden to CPNPP.
- 6. Proposed Alternative and Basis for Use:
Proposed Alternative:
The following alternatives are proposed in lieu of the required examination coverage of essentially 100 percent:
- 1. Ultrasonic testing (UT) of the subject component weld was performed to the maximum extent practical during the second ten-year interval.
- 2. Pressure test VT-2 visual examinations were performed, as required by Code Category B-P, during the second ten-year interval. No evidence of leakage was identified for this component.
Basis for Use:
The basis for use of this alternative is that it provides the best examination coverage practical within the limitations of the current configuration. Based on the percentage of the examination volume completed and the lack of any indications identified, there is a high level of confidence in the continued structural integrity of the weld. CPNPP believes that there is no undue risk to the public health and safety presented by this request.
- 6. Duration of Proposed Alternative:
to TXX-14103 Page 3 of 14 10CFR 50.55a Request Number B-13 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
The second ten-year ISI interval for Unit 2 began on August 3, 2004 and ends on August 2, 2014.
- 7. Precedents:
Comanche Peak Nuclear Power Plant, Unit 2 First Inspection Interval Relief Request B-5, "Steam Generator Tubesheet-to-Channel Head Welds," as approved by the NRC in ADAMS Accession No. ML012490192 Comanche Peak Nuclear Power Plant, Unit 2 First Inspection Interval Relief Request B- 14, "Steam Generator Tubesheet-to-Channel Head Welds," as approved by the NRC in ADAMS Accession No. ML051670284 to TXX-14103 Page 4 of 14 10CFR 50.55a Request Number B-13 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Profile Page 1 of 2
- 1~~
b *'I: 94;~
LjEV 4
Th~. dA.
I.. -
÷
-74 100
- 31) F' I',
k".6D eIr / -- A1 ITFL ~ _ _se
.ii
- -7I-to TXX-14103 Page 5 of 14 10CFR 50.55a Request Number B-13 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Profile Page 2 of 2 to TXX-14103 Page 6 of 14 10CFR 50.55a Request Number B-13 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Page I of 9
-LLD
) cif..lDIe I-I-
- -a;c IsaK
,S.E C
I '
I-i 1 1.6)?2 ('I"6. f~ *2 I 0.51-Nil*1,~
20 '.21214 1.1
- .lV03 J I'Bit to1812 trttIUSIJ 4.!! 13 4ll 48V II ) .83. 41C S:ITII::
NOZZLE I145126
,LUSIM1r1 M.* DO4 DESCRIPTIONJt SIEAIJGEIJEROCP.S 1.2.3 4 ITUBES IDEI5.3/SA.508 TU ELECTRIC IVEAOSIU0E) .rS-216 iSOLI 11,43 I* LENGTI 1.615' 01&U116.1 CPSES UNIT 2 INSETVICE INSPECI ION LOCATION ISOMETRIC "1 ~POL7~ ~4~4'2-~, ~'.{ gy -I - I--
V? -1.31ýO lprv'.I I
.I " I'1 to TXX-14103 Page 7 of 14 10CFR 50.55a Request Number B-13 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Page2 of 9 UT Calibrat. ...aminafon SI~e,Ur:;t CPNPP 1 2 Piocedu!e TX-ISI-2I0 Oj:age No 2RF13 Summary No 011700 Procedure Rev Feperl Nao UT.201205S Workscape ISi WomOrder No 4181105 Page I Of 8 Co'e ASMESec. XI1998EdJ2000 Add. Calijte' B-.B112.40 Location 2.1541,RB, 812 D.a.,nmNo TCX-i-3100 Decrnpin SG4 CHANNEL HEADTOTUBESHEET WELD System ID: RC CoTocrlelr ID TCX.1.3100.4-i Size,'Lungt 1.5"1426" Thicknns,'Uamveert S.3"I136.,"
Linr1tj.*'t SEE DRAWING Stan Tire. 1038 Fnish Tirre 1229 Instrument Settings Search Unit Cal. T[me Date AxialOrientated Search Unit Spro Neo. 104765 Seria: No 01COX1 Check, - . -
n.lOcver GEJT 1 latre KBA cal Cal. 0900 10i1021 Cal6r1201n Signal Sheep So Path
______ GI_,_____Knt__l___0__2 Reflecter Amplrtude % DOaion tio'c' USNSOLSW L reaiy L-2012-004 Srze 1." Dia Moel: CompnG nter0Cal 1037 1 2012 114T 82 1.5 1.36 De!a 0 Ra'te. 9.09 F eo 2.25MHZ Cener Freq: 1.97MHz [ter InterCo.
- r. 1/2 1 314 T 810 3.0 45 2.72 40 t.fl Ca'Vel 0.2319 Pu';er Ty:e Square ExamAngle 0 S,"nt Angle NI _ naICa 1308L. 1012012 NIA 70 4.5 R;eto 0% feasired Angle 0 Mode. Shear 1n N/A -Ci_10 Oamprrg 508Ohms 2.25 MHz E;,,,.n I A eeofEements 1 PRF Auto High SUFrtq
- CaN
-r_____ Bat:h. 07225 Circumferential Orientated Search Unit Fro;evecy 2.25 MHz Rc12i. Fut~wavn Ccrfu SINGLE Feces: NIA-r% 4 SINGe 2ocus' NI
-- Type Ultragel II Calb!atiin Signal Swveep Vc:1,jc 450 PL:5t', l 0_,h 220 Sna _ Round Conto __ur H/ Mfg Sonoletch Reflecir A."nphlude% t,.vln Soumn d Path WedgeS,'&- NIA WA N/A _ __
A. Gain(d~l 8.9 Crc Ga ' id5) 8.9 Search Unit Cable p U lINIA 10 Saeer O.= 9.09 0 Of SoundPath Tice RG-174 Length. 12 No.Conn.. 0 MTy.. Senoteck N/A Calibration Bloc, Scan Coverage NIA Uptrean.m *,trea-n' o' ,Scan dB. 18.7 Reforence Block Reforencelimutatof Block Cal i*c.ANO TBX-28 0S SerialNo. 1078 Gain Signal Sweep P'tt.ress 5.45 Da 0 CV! CCW
- ScaOdB dB Relletor Ampitude % Diviron SoundPath C9 Terr 9S lerrnt too' RF2425 Fya, SLKca 00 Type Rompas Block CIS 8.9 SDH 54 0.9 .8,4 Cc."npTemp 97 terrp Too RF2425 Suram Col.lon Flush Recordable Ind'cation(s): Yes NO7 (if Yes Rel Attached U'trasonic IndicatlonRepore.)
Rcvurfi, Acc.apt [V' Ren "
__' Itor. Comments 77.5% CODECOVERAGE ACHIEVED Prcc:t O CoeeagcyOb:3=d - : 1.O 077.5 Revez*adPre,,;a s Data Yes bamrrie; Le-,el11 )Ziglatoe DateReviewer ale D.Sa~t~"
Fang, Chia Wei 10/1612012Sabo, Steve . A.- /. .
ole, Leve, lilA Signatare Date Ati ReV.ew giialure Date 111A Ballard, JackMill (
to TXX-14103 Page 8 of 14 10CFR 50.55a Request Number B-13 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Page 3 of 9 UT Calibrat . imination S~te:Ui' CPNPP 1 2 ProMedUrt lO4St. 210 Outage N1o. 2RF13 Sun'.maýY No 011700 Procedure Rev" 7 ReportNo UT-2012-055 Workscape 151 WedtOrder No 4181105 Page 2 of 8 Code ASMESec. X11998 Ed02000 Add. CatAlem' 843182.40 LocraoA 2.154L, RB,812 0r1`4.73 Nto TCX.1-3100 Deoz.ltion. SG4 CHANNEL HEAD TOTUBESHEET WELD Sierm ID RC Ccrpcrer. ID TCX-t.3100.,4.1 Size.length: 1.5-1426- IldnesVia"THer 5.3"I '35.V" L..tLsor SEE DRAWING StarThne. 1038 Finish Tine 12B9 tInstrument Settings Search Unit CaL Time Date AxialOrientated Search Unit So arto 105421 SerAlNo OIBXVF Checks lbration S ia l -Ca U.Ia-J'omrer CGEI'l ,an.aclurer KBA IntialCat. 0920 10112012 ReSe.c Amp'.*e %u P,",thn
%!,de'. USN60SW Unearly L.2012-003 Size 0.50"X 1.0" tucr SWS Cal. 1050 0116201 1/AT 4 80 1.5 1.94 De'ay 11)085 Ran;e 12.95 Freq 2.25MHz CenteiiFi 229M~z Intel Ga. 112T 45 3.0 I .88 Mtcaie.. 0.1261 Pý' 7e Square Exam ge 45 Angle -NA Intel Cal Yt4T 30 4.5 5.83
_t_ _,.
_._25 _Squre SqCin:krgi NA F, F 1309_1011611 H 12 Carp j g: 500 Ohms Re.d 0% M.easured Artge 45 Mode Shea1 NOTCH 12 . 1.00 Pfl AutoNigh SCFrr 2.25 MHz ExI P,,,, 0.65 #0O;Emrents I Ceuplant 1114T 1 9 1 10.0 12.95 F'cTJenCy'*. .2 MHz 2.25 z ey. Fullwave Feey. Cor*9 Single S Fcs oc N/A
- Cal Balch 07225 Circumferential Orientated Search Unit-o'a.ac. 450 Pulse7r~t. 220 CType Ultiogel II Caibrabon Sinal Sweop
. Shape RECT __or NA
_ Mfg Sonntlh ReI* ,~ot Amplt,,de e11 v,, p ath C c Gar dE) WA Se a UnitoCal Exam Batc 07229 NiA _ __ _
Ar Gar 1dB). 39 1 MalScreenCv - 1.295' i-, of Sound Path Type RG-174 Length IZ No Conn" 0 TNpe UltragelI NIA _ I Calibration Block Scan Coverage 9 Sonooch N/A I CalB':cc.. NO TSX.28 Upstream 4 Devnrstream.4 Scan dB 64, Reference Block Referener/Simulator Block t':),ress 5.45 Ca 0 Cw CcV'I Scan d8 F4.9 Serialt0o 104878 oRnI dl Signal%oDd S,,eep Pat Ca Bk tetmp 95 TernpTool RF24t2S EvarSriace: O0 - Type Rompas Block C/S S Cc!p Ternp 97 ereip0ool RF242S Surface Ccnd*lrn Flush Recordable Indication(s): Yes - No 7 (IfYes, Re! Attached U.,asnni: I, cat.rtnReport.)
ReS'It Accept y Ree:t - Ino- Comnmenrs T7.5% CODE COVERAGE ACHIEVED Percel OfCo;,aiage Obtained >SGi NO-77.5 Re*w*ed Pre*ious Data Yes wan.ne" ene' l-pol Srgna:ore Da.e Rere-ver S Williams. Stephen T. S, ur 0 D1,'e2Sabo,Steve >' /)nRe (Date Exarni-or LevelN/1A s~rnal.re Dale S:IeReview ~ ~ale Dgam MIA ISEnginneer( ~ i I .
Oti"o Level NIA SýIralore Dafe ANOI Review ~ / De Uw~'au NIA Ballard, Jack ANtI o q, alV-to TXX-14103 Page 9 of 14 10CFR 50.55a Request Number B-13 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Page 4 of 9 UT Calibrat iamination S,:eAJr t CPNPP Procedure- 1X-tSI.210 Outage No 2RF13 Sumnmary Ito. 011700 Procedure Rev Report No UT-2011-055 Warkocopi SI WOaOWerNo 4181105 Page. 3 ol 8 CqjP ASME Sec. XI1998 EdJ2000 Add. Cal ,tern B-BUB2.40 Locatici 2.141L, RB,812 0,3'6;n3 No 'CX.1.3100 Descri*[i* SG4 CHANNEL HEAD TOTUBESHEET WELD S,5ieoT ID RC CcTrp-nenI 1 ICX.1.3100-4.1 SizeiLenglh 1.5"1426" lltceess,f'arreter 5.3"1 135.6" Li-!a*or*s SEE DRAWING Stat Time 1038 Ftnrshtime 1229 Instrument Setlings Search Unit Cat Tuee Date AxialOrientated Search Unit Se:al No 105208 Sena Nlo -01BV9 Checks -- -
Ca/to!Snae, i S1eepS Seernd Path tM'nLactI.rer GETI, ManLdu.er KA In~%La091 16/12 Reector Amplpude 1, D:zslon MLWolUSN60SW Lreawly. L-2012-001 Sze 0.50" X1.0" Model: SWS 103S 1612012 114T 1.5 2.778 Dcxa, 15.7069 PRaee 18.52" Fieq 2.25 MHz Cen'.eFreq. 2.27 MHz I a~f ja112 T is 3.1 5.7412 11tiCa Vel 0.1274 PLt, fC;e. Square EarnrAngle 60 SquinlAngle N/A .......
..... /4T I 4.5 3.34 Dampirg 100Ohms Rtjed 0 t.M._
ea*eArg'e 60 Mode. Shear Notch 5.8 11.55 PRF ,uto High SUFreq 2.25 MHz Eoyt FoAt 0,7 4 ofElements I Couplant 5241T I 2 7.2 14,366 Fuv%) 2.25 Fqco
.5MzMHz it-i R,'y FullwarSe
- Cool-. Single Focus: Ilia - CalBach 07225 Circumlerential Orientated Search Uni:
Vc r3ge 450 Pu '1 220 Rond C N Type. Ultragetl l Calb.alon Si~ngl S'Tepe A-plude%
1WA I V' -Sape Round Con.r NIA latg" Sonotech Re-r n SoundPath Wedge Stye. Non4Frtegral N/A A. Gon cB) 45.8 Crc Cai :dB1 0 Searuh niteal Exam Batch: 07225 Search Unit Cable NIA _________
1.5 Screen DOv 2.778 n of Sound Patti T)e. RG.174 Lenglh. 6' No.Conn.: 0 Type: Ultragel 11 NlA
. -. Mig Sonotech Calibration Bloc. Scan Coverage NIA C:18c6:. No TBX-28 Ups!tEamrt- . j ScandB 69.8 i*.sream Reference Block Reference/Simulator BIock
-Gain Signal STep Somod Pathn
,[iceos 5.45 Cia 0 CW* CCWV4ScandB 69.8 Senal1lo0 104879 GaenBRe A..pliu JSector Division Ca'01,, Terp 95 TcmpToo: RF2425 Eam Surface. OD - Type Romnpas Btock CIS 45.8 SON 90 .4 0.740B Cc'rp Temp 97 TempToo' RF2425 SurfaceCenAdron Flash Recordable IndIcalton(s): Yes No q ýlfYes,Ret Attached UWrasonc: rndication Report Res-'s Accepti R,e.t Into Comnens 775%CODE COVERAGE ACHIEVED PacE"-t O Coverage Ottato ned>> : NO.71.5 Revened Pre.-,.eus Data: Yes Evamniner Levet it-PDI iotr DateReeenn m~rs Date 4
Vidrih, Tomaz 1011862012 Sabo, Steve /o/ //
Exa'i-er Leve' N./A SI atum Date Ste Reviow". Dote N/A ISIEngineer / ./ 2 Cther Level NIA Signature Dale ANII Reve*ew Signature Date NIA Bat/and. Jack ANtiIc I f
/
to TXX-14103 Page 10 of 14 10CFR 50.55a Request Number B-13 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Page 5 of 9 Supplemer. . ..ort 2 2 Revnd No UT. O1.Ota Page: 5 C1 8 Summary N 011700 ketch urP110:0 0 IJS1A2Rr ecM.MTCA',I 31CO-4-I 13DlrasmlS PR0~iLE 8 jog TCX-1-3100-4-1 1 .. :.!:
4-- I _
l~L -I
.1 *~
I.. ,*,JI III
.1.
I,
.1 I I *~ -.
/' 'I' I.
Ii 'I
- sAqa e ork4w' k to TXX-14103 Page 11 of 14 10CFR 50.55a Request Number B-13 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Page 6 of 9 Supplemer. ,~ort Re~ort Ho UT.2012.0bo Page: 5 of -8 Summa-i No. 011700 Ske:ch orPhc,.o 0 JSF,2RF PROF LEO 13Dafahei Sca%1CCAl-31CO-4.! 8 iiI IIT
.4 Ii
.11 I
d 1 l~/
F I
I
- LA*/ 4d.. Ory;L, We-IJPrIV SO~
/F7 4,BA f Nk to TXX-14103 Page 12 of 14 10CFR 50.55a Request Number B-13 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Page 7 of 9 Supplem ei ,-port 2012.0=i Page: 6 of 8 Summary'Jo 011700 Ske'd, or Photo 0 *S.r2PF 130o.*ose1 ScrrsfTG.X. Sp~e~l J5i
.3*0O-4-Bearn TCX-1-3100-4-1
',. . , \, !7 N.r'z . \-Z
,2,R
- ~\ ~ Cý Ofv ,,,,XwCE .5 L ,*A~L i'4 q7
Supplemer. jort Rppolt No UT.20l2-Otio (D Pawa 7 of Su¶mlnory No 011700 mr (D
Skctdi o- Photo: 0 ¶Sfl!00- 3 UDA~hr- Scarsl L-A--3100-4-I Heam Sprew 50 pg 00 TCX-1-3100-4-1 0o a;
45 I
0" oi
/ .C 7fR,4NV-STfCCA AAJC$6 to TXX-14103 Page 14 of 14 10CFR 50.55a Request Number B-13 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)
- Inservice Inspection Impracticality -
Weld Exam Page 9 of 9 Limitation Record Siteakhr CPNPP 2 TX-ISI-210 Ou.,-Ige No 2RF13 rnlary?40 011700 Prozedire Rev 7 Repor, No Ut;-2012.055
- otkSCooe I Wou1ý Order No 4181105 Pawe a of a r -t.- ,,r- z.: -ý.. :- t C
/ ./-
4C>(-vT*1CA-4
- \ %
\ \~, \~ N ~ N N ~
F ~
V 4- - i-e(
/- F7CTAL-1C 2-~" ~
Limitations fe'rO4 reluiremcnens Radiatio. fed