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)

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

a Luminant Rafael Flores Senior Vice President

& Chief Nuclear Officer Rafael.Flores@Luminant.com Luminant Power P 0 Box 1002 6322 North FM 56 Glen Rose, TX 76043 T 254 897 5590 C 817 559 0403 F 254 897 6652 CP-201401035 TXX-14103 Ref. # 10CFR50.55a(g)(5)(iii)

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.

2.

3.

CPNPP Unit 2 Relief Request Number B-7 CPNPP Unit 2 Relief Request Number B-12 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

0

~1*,

0).-,-

~4,-r 0

-3 0

WELD 2 REF. 2-11001 EIaU['- (!IR&T

!UI UAoou&

AJjIj I1ISI0 AflOJS 11 HOTSIDE 1-81 TO 1-816 I

COLOSIOE I-Bir IQ 3-632 Is 2

2-1 RDTSIDE 2-SI TO 2-616 2A (COLSIDE 2-617 70 2-232 26 3

NTID

-10T 3-016 3.1 3

-1 COLIISIDE 3-BIT To 3-832 36 A

4.1 HUTTIDE 4-Bi TO 4-BI6 41 COLOI.301 4-BIT 10 4-032 48 Z

zU) >

m r) r)

z Z (1) r)

'o m tri ITS

=10 m

Z A c-, ýr CD rfl r) cn oil z

rim En P

r) aq w

t-4 "q

iauST6ilIOE USE OR~T NOTES:

DESCRIPTION: STEAM GEN3ERATORS

1. 2,3 &4 TU ELECTR IC (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 IT fir Q

FAPPýRO:VAL:

X>

PDI Calibration Data Sheet Plant I Unit CO.ANCHE PEAK UNIT 2 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 01 o

)

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

1. 2 Unit0

=

to Weld Batch:

06225 Manufacture:

KBA Manufacture:

I M M Recordable j

Access I Indications j Exam Sens.

Examination Area / Weld Yes__

J~ I No eorn1 TCX-1-3100

" 2-1

,27.0 dB Remarks I Reason for Incomplete Scan(s) 22% NOT EXAMINED SEE LIMITATION SHEET COVERAGE TAKEN FROM PREVIOUS DATA Examiners:

WALLACE REID Level II Date 4/12108 Examiners:

NIA Level N/A Date NIA Serial No.:

01COX2 Freq.: 2.25 MHz Serial No.:

Freq.:

Size:

1.0" Shape:

ROUND Size:

hape:

10 Exam Angle 0° Model:

GAMMA Exam Angle Model:

0 Z 10 n.

Measured Angle:

0° Measured Angl U)

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 Instrument Settings I strument Settings

(

M Make / Model:

KBA / USN 52R Make / Mo el:

w_

Serial No.:

102282 Serial No.

Dis.Delay:

1.227 ps Range:

9.037 Dis.DL.a

-Range:

Prb.Delay:

NIA ps Pwidth:

NIA Prb.Del:

Ps Pwidth:

M'tl CalNet:.2315.Is Pulser SINGLE M'tl Cal et:

ps Pulser 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 Reference Sensitivity (Sens.)

Re rence Sensitivity (Sens.)

Axial:

13.0 dB Circ:

N/A al:

Circ:

SDH Sensitivity:

N/A H Sensitivity:

luitner Evaluation Required?

Fl Yes

[Z] No Rouiaewr J atec~ 2.~

e-( 0 g

PDI Calibration Data Sheet I.

Plant / Unit COMANCHE PEAK UNIT 2 Company WESDYNE Comp / System STEAM GENERATOR 2 Procedure No.

TX-ISI-210 Rev / Chng. No.

6 / N/A Cal. Block No.

TBX-28 Cal. Block Temp 75" Comp. Temp 80" Therm SIN:

TU-2261 Size N/A Sch.

NIA 7T

[C Drerition:

Aial*t.nitir.

Cal. Direction:

Axial Circ. X Both Data Sheet #

10 UT-18B Page 2

of )F Cal. Checks Time Initial Calib.

0755 Initial Calib. Dale 4/12108 Intermediate N/A Intermediate NIA Final Calib.

1220 Final Calib. Date 4112/08 60 40 20 I

• i7 2

4 8 0 CRT Div. =

1.297" rT1 00 0

00 OQ (0

0

~t>

rbr w

Couplant Scan Area:

to Weld Type:

ULTRA GEL II Search Unit #1

.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 Search Unit Cable Type:

RG 58 A/U Type:

Length:

20' No. of Connectors 0

Length 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 Further Evaluation Required?

[1 Yes

[1 No rim 0

Z Zrf L rEl "Z

j Z

ZI n

ty:

wt5kff Aut~er

)L p-ot 111

WESTINGHOUSE NUCLEAR SERVICE DIVISION INSPECTION SERVICES BEAM SPREADS rTI C

C C

r)i m

rr i 03

PDI Plant I Unit COMANCHE PEAK UNIT 2 Data Company WESDYNE Page Comp / Syslem STF-AM ENE4ATOk 2 Procedure No.

TX-ISI-210 Cal. C Rev / Chng. No.

8I N/A Initial Cal. Block No.

TBX-28 Initsal Cal. Block Temp 75" Comp.jTemp 80.

Interm Therm SIN:

TU-4261 Interm Size NIA Sch.

NIA IT' Firnal jX Ferritlc

-Au~tenltic Final Cal. Direction:

Axial Circ. X Both Scan Area:

-L to Weld to Weld Type:

Batch:

Recordab Access indication Examination Area /Weld I_

Yes No C

TGX-1-3100 2-1 124IDED!

~

Calibration Data Sheet heet#

1OUT-18C o

I hecks Time I-----

Callb.

0800

-Ar.

1 40__'

Calib, Date 4112108 I

ediate N/A 20 20 emdiate WITA t

Calib.

1230 Calib.ate 4112108 0

2 4

6 8

0 2

4 8

CRT Dlv. -

1.48" CRT Dlv.

Couplant ULTRA GEL II Search UnIt #1 Search nlt#2 06225 Manufacture:

KBA Manufacture:

l /

Serial No.:

01BXVB Freq.: 2.25 MHz Serial No.:

r eq.:

hle Size:

.5" X 1.0" Shape:

RECTANGLE Size:

Shape:

ns Exam. Sons. Exam Angle W0* Model:

GAMMA Exam Angle._

Model:

Geom

._ Measured Angle:

600 Measured Angle*

59.0 dB Wedge Style:

SWS Wedge Style:

Search Unit Cable Se rch Unit Cable Type:

RG 58 A/U Type:

Length:

20' No. of Connectors 0

Length:

__/. No. of Conncctor Instrument Settings IMtrument Settings Make I Model:

KBA / USN 60 SW Make / M el:t Serial No.:

105420 Serial No.,

Dis.Delay:

.&35 p3 Range:

18.48 D0s.Dela.

Range:

Prb.Delay.

14.8894 P8 Pwdth:

220 ns Prb.Del :

psPwidth:

MU Cal/Vet.1270 ps Pulser SQUARE 1iI Cajet:

ps Pulser 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 Date 4/12108 Reference Sensilivilty (Sons.)

Refe'ence Sensitivity (Sens.)

Axial:

45.0dB Circ:

45.0 dB A*iaN:

Circ:

Date N/A SDH SenslUvity:

NIA

• H Sensitivity:

F*Oter Evaluaton Required?

j]

Yes IT

-o X

['T 03' 0}

10 0

1-d tTIl 0['I l-l)'T I

I I_ _I I I Remarks I Reason for Incomplete Scan(s)

%1 NOT EXAMINED SEE LIMITATION SHEET COVERAGE TAKEN FROM PREVIOUS DATA Examiners:

Level____

Examiners:

N/A Level NIA Rýitwwicaw S;Z-ý9 vfirlo

ý 4,o7r D!a

?Ri A0110.

WESTINGHOUSE NUCLEAR SERVICE DIVISION INSPECTION SERVICES BEAM SPREADS REPORT NO.

10 UT-18C PAGE OF TX-ISI-210, REV. 6 0z 0<

o ~

-s 5-. 5-5 0H 0(A PLANT COMANCHE PEAK UNIT II PROCEDURE TRANSDUCER S/N 01BXVB ANGLE 60' SIZE

.5"X 1" FREQUENCY 2.25 MHz CAL. RLOCK EXAMINER CAREY LASOYA TBX-28 DATE THICKNESS 5.45" 04/11108

/

~9O 6/0 0

s~

65.6-0 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 COLIISIE 1.817 T 16 -622 is W

HDIIISIDE Z-8. 10 2.0.4 j

.I&n-E.

COLDSIOG MIT1 10 ?-832 28 COLOSIDt 3-817 io 3-632 2

I.,

1210TSD 4-91 T 10-6IG 4A OLD 021E 4-01? TO A-832 48

/

BQLIIK P/ZL

- 8011mG I

~IWESDynl Plant I Unit COMANCHE PEAK UNIT 2 Company WesOyne International Como I System STEAM GENERAT'OR Procedure No.

TX-ISI-210 Rev/ Chng. No.

710 Cal. Block No.

TBX-28 Cal. Block Temp.

83 °F Thermometer S/N:

IC - 1454 Size 19 L X 6 W X 5.45 T Sch.

N/A M

Ferritic M

Auslenitic Each Major CRT Div. z 1.428" Cal. Direction:

IDAxial []

Circ. []

Both Calibration Data Sheet Data Sheet 9 12 UT-017A Page I'

of

/0 Cal. Checks Time Initial Calib.

0808 Initial Calib. Date 04108/11 Intermediate 1320 Intermediate N/A Final Calib.

1655 Final Calib. Date 04/08/11 Couplant Scan Area:

o Weld toWeld Calibration Reference Check:

Rompas Block: #

104874 Ref. Reflector:

SDH Type:

ULTRAGEL I1 Batch:

06225 hi.-

4 G

2 Search Unit #1 Manufacture:

KRAUTKRAMER Serial No.:

0IBXV9 No. of Elements:

1 Size:

.5 x 1.0" Shape:

RECT.

Freq.

25 MHz Style:

GAMMA Exam Angle:

60

,IMode: SHEAR Measured Angle:

60° Wedge Style:

NON INTEGRAL Search Unit Cable Type:

RG 174 Length:

12' No. of Con.:

0 Instrument Settings Make / Model: KRAUTKRAMER USN 60SW Serial No.:

SAP 105205 Probe Delay: 15.8003 Range:

14.28 MIl Cal/ Vet:

.1266 Pulser: SQUARE Damping:

500 0 Reject:

0%

PRF:

AUTOHIGH Freq:

2.25 MHz Filter:

FIXED Mode:

P/E Rectify:

rULLWAVE Voltage:

450 Pulse Width:

220ns Reference Sensitivity (Sens.)

Axial:

63.5 dB Cire:

N/A SDH Sensitivity:

47.6 dB CRT Div./SOH 1.1 F

Recordable Indications Cý wv -

0 C)

CJ Access Exam Examination Area / Weld Yes No Geom TCX-1-3100 1-1 BOTH X

75 dB Remarks / Reason for Incomplete Scan(s)

COMPONENT TEMP:

95*F 69% EXAMINATION COVERAGE ACHIEVED Search U it #2 Manufacture:

Serial No.:

No. of Elements:

Size:

Shape:

Freq.

S yle:

Exam Angle:

Mode:

Measured Angle:

I Wedge Style:

A n Cable Type:

RG 174 Length:

No. of Con.:

I strument Settings Make / Mo el: KRAUTKRAMER USN 605W Serial No.

Probe 0 ay: __

Range:

MIl Cal Vet: _

Pulser:

Dampi 0 Reject:

PRF:

IAUTOHIGH Freq:

Filler:

Mode:

P/E Recti y:

Vnllage:

Puls Width:.--

Ref rence Sensitivity (Sens.)

Ax 1:

Circ:

S H Sensitivity:

RT Div./SOH U1 CD n

U,CD el Examniners:

TOMAZ,,DRIH 11 V'..-- Level II Date 04/08/11 N/A Level N/A Date N/A Reviewers:

Further Evaluation Required? r-vYes M ojN 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 Plant, Umnt COMANCHE PEAK UNIT 2 Company WesOyne Irterrational Comp / Syslrrm STEAM GENERAIOR Praucmed tin TX.IS!-210 Rev I Chlig o 7It0 Cal Bod No.

8X.28 Cat Bock remp.

83 'F Ri*,emn uelme SN IC-1454 S ze 19LX6W X5.45 T Srh.

wA E

Fcri.

r-IAusteviic Eac* bla,ou CRTriv

.963,3'

..a Dieivn E

]Aal []

Cc E] Both Iai Area oWve.d MX

,abya'.nn Rclerence Check.

1,vr'as 6 ocit 104874 Rel Reflec.or:

SOX Calibration Data Sheet Data Sheet/#

12 UI-Ot1B Page I u Cal. Checks Initi Cat:b tn~ia Ca':b Dale Intermediate Ine'rnediate Iroa, Cathb

indl Ca.b Da'e Time 0811 04108/11 1300 KIA 1655 0C0811I r

Couplant TýlTr ULTRAGELII Batch 06225 Access Recordable Indications Yes I No I Geom Exam Sens.

E hamnaton krea Wold TCX-1-310(

I-"

BOTH X

e3dB Remarks I R.a~on [cr Ineomplele Scar(s)

CO!.'POl*Elfl IE.P 95'F 0' TO 135' AND 315" TO 0' SCANNED 78% EXAMNATION COVERAGE ACHIEVED Search Unit #1 Manufactroe:

KRAUTKRAMER Serial Nu.

O1BXW7 No. cf Elements:

S'ze.

1 X.50 Shape: IECI.

Freq. 225 MHz Style.

GAmIMA ExamAnge:

45" Mode-lEAR Measured Angle:

45' Wedge Stl*e:

NON INTEGRAL Search Unit Cable type tIC I BNC Lengh:

1Z NO.of Con.:

0 Instrument Settings Make I Model: KRAUfKR.IMER USHt S8.

Seua, No..

SAP 10439' Probe Delay 22712 Range 9.633 M' Call Vet.12W4 Pulser: SQUARE DampIrg 500 Rej*ec:

C%

PRF: AUT OHIGH Freq:

2.25 MHz Filter F'XED Mode:

D/E Rectily:

F.iUwAvE Voltage:

450 PuLse Wid:h.

220ns Reference Sensitivity (Sens)

Ax!at:

56 dB COrc.

IIIA SDIl Senrovtly 40TB0 CRT DivJSDH 1.1 Noa.

of Elemnents:

Size.

Shape:_____

I Enram Angle.

Mode:

Measured Angle-Length No. of Con.:___

strument Settings Makte I Mo et, KRAUTKRAMrER USN 66OSW ProbeD y __ Range:

MU alYe. ____Pulser:____

PRF: AUTOH5G-H Freq____

Filler._____ Mode:

PE Rect, Y: _

___Voltage:___

Refrece Sensitivity (Sens.)

Am 1: __ _

C/to I

HSensitreuy T T DivJSDH E1o"'i..c JENJRW1 4=

Level 11 D3le 04108ull NIA I eVe)w N/A Date NIA Re~.e~rr~

F.1k~rE uaWtnReýLed' M Y.e M~NO 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.

Fort r U, t COMANCHE PEAK UNI r 2 Company WesDyne Interroetna; Comp i Sys'nm STEAM GENERATOR F,ocedure Nto X-ISI-210 Revi Cling Nto 710 Ca!. SWccv No TBX-28 Cal Bltck Temup 83 IF Thrm.rrrmeer SN IC. 1454 Size 19LX6WX5.45T Sch.

N.,A ED Ferr.t Auster,' Ic EMah r CRT Div 9428" Cal Orecton

[]AxioI M Crc. 0 Both Scan Area JMo Weld 11 to W~e~d Ca'bra'on RefEerce Check.

Rorrmxs Bock' 104874 Re! Retector SOH Calibration Data Sheet Data Shect 9 12 UTO17C Page 2 of 10 Cal. Checks Time Inilia Cati,.

(830 1n65i1t Calb Date 04.I8/11 Inlto ediate 1315 Inter',ediale NIA Final Ca'ib 1645 Final Calib Dale 04,08111 Coupfanl Acces Type:

ULTRAGEL II Bad(h:

00225 Recordable ss Indications Yes No Geom Sns.

I.

Search Unit #11 Manufacure:

KRAUTKRAAIER Serial No.

0IBXvB No. of Elements:

I Size: 5 X1.0" Shape' RECT.

Freq, 2.25MI-z Stlole; GAKAIA Exam Ange-45 -Mode:

-SHEAR Measured Angle 45*

Wedge Sitl:

NON INTEGRAL Search Unit Cable Type BNC Length:

12' No. of Con.:

0 Instrument Settings Klakei Model. KRAUfKRA.IERIUSI 581 Serial No.:

SAP

10476E, Probe Delzy: =2212Range.

9.428 NItl ColtI Vat:.1262 Putner. SQUARE Dam~anq 566 Reject:

3%

PRF-AUTOHIGH Freq' 2.2i ltila Fi~tel: FIXED Mode.

PIE ReeIly RILwAvE Voltage:

450 PulsiefWIh:

220iis Reterence SentsitieitySeas.)

M~al, 57.4 OH Circ:

IV/A SDHl Se*l7 Ty 42.4 dS CRT Otv./SDH NA Search U it #2 Manufaclure:

Serial No-No. of Elemenets.

Size.

Shape:

Freq. _

Syte.

Exam Anle.

Mode:

Measured Angle:

Wedge Slye*.

We at Cable Type RG 174 Length:

/

No. of Con.:

strument Settings alake I M.e Serial No ProbeD ay Range' IJ.ll Cal Vet PuhLer:

aOampi I) Rejet PRF:

AUTOHIGH Frog:

Filter:

Mode.

PE Recti Voltage:

Pu WidthJ Ret*rence ens!vly (Sens.)

Ax *:;

Circ.

S RT ScnOtivityH T Oriv./SDH Exam nat on Area I eld TCX-1-3100 I-1 BOTH X

67.4 dB Remarks 'Rason for Incomple'e Scan(s)

CO,!PONPeIT TEMIP. %IF 135' TO 315' SCANNED 78% EXAMNI'ATION COVERAGE ACHIEVED WA Lacl NTA-Date N/A Rev rvrs FitrorE-.aWea'or Reqic4? [lYe, [ONDt 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

ýlar! I Uril C0OMANCHE PEAK UNI 12

'Orr81),

WesDyne ltiemnuIona!

COTp 1 %S512m STEAMI GEIIERATOR PracedureM toX ISI-210 Re; IChng No.

713 Cal ffodt No TOX-28 Cal.

8,U6 Tend.

83 'F iteirrrsrreter SiN C -1454 Size 19iX6W 1(5.451 Sch NIA

[J FerrAt.-

f Eah"p CR1 Div

.67W6 ZlCCV'ecer, E mAa'n E Circ 0 Both 3(vn A'ea 10Weld f

?ntmljon RF'erete Chrck Calibration Data Sheet Data Sheet 4 12 UT7417D Page q__

of ik.

Cal. Checks Thie nial Caib 0/45 Inital Caib Date 04M81l1 Interrefte 1310 Ilnterned~ate IlfA Fnai Catb, 1m0 Final Calb. Date 04/.8/i 1 Couplant R"mPas BlocK i

N/A Re' Reecc.

NIA Type ULTRAGEL I Bath:

06225 Recordable Access Indications Erxiam,,tfnAtea,'We'd Yes No Georno n

Manufacture:

KRAUT:RAMER fIaru!acUe Seriat No:- 0 Tai( l.

.4fisen No.

No. of Elenie I

No. of Elements:

Szee 1.0' Shape: ROND Size.

Shape.___

Freq. 2 25 MHz Style:

GAMMA Freq.

S e:

Exarn Anqe.

0 Mode.

-STRIAGHi Exam Ang'e:

Mode:

Measured Angle:.

0 Ieawued A rgleens Wedge Style:

NtA Wedge Sty~e Search Unit Cable Sear Cable I

type RGU174 _

Type.

RG174 LeNo:

6E No. o Con.:

0 Lengt e No. of Con.:

Instrument Settings I stiument Settings Make I Mlodel:

OlrKRAUT(RaER usiN TOsf Make/1Mo el: KRAUTeNIAER USCI&Osv Seriat NO.:

SAP 105421 SOW aNo Probe Delay..5212 Range:

6.706 Probe a._

Range.

MU/ICallVe..2304 Pulsei: SOVARE M1t Cal Vel-

____Rser:____

DamoIn:

500 0 Rejec:

0%

Damp, (3 Rqeicl:

PRF: AUTOHIGH Freq: 2.25 2iz PRF: AUTOHIGH Freq.

Fil.er.

FIXED Mode:

P/K Fitera

_ Mode PIT Rectity FuLLwAvE Voltage-450 Re t

. e Voltage:

Puse Width 220ns Puls Width:

S

__e Reference Sensitivity (Sens)

Ref enceSesitimety (Ses)

A xial:

10.1 dB 5 2rc N A 1:

I SDH Sensititily; IMA S H Senfliviiy: _______

ORT Div JSDH 50 A

FITO DaRJSI d

TCX-l-3100 1-I BOTH X

30dB Re-nar~s R*eR Icr Ince*rz'*ee Scn(s)

COYPONENI TE!P 05SF 78-%

EXAM NAIION COVERAGE ACHIEVED K'A CLeIj NIA Date NIA Rra.iame~

Fehrlva'.21onRequiend? M1.e% jmjt 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 Pvt., UxI COMIANCH~E PEAX UNIT 2

Ccmpany Wes Dyno hlereonalora Comp I Ssvsem STEAM 5ENERATOR Proceduwe IIo TX4Sc1210 Rey ICln gýlo 710 Cal 810act D.

IBX.20 Cad' 8'xc/ Temp 837~

Ihermrollrner SA IC -1454.

S-re 19LX6WX.45T

-Snr.

RIA I

Ferrili, Aus1e~i~

Ea~r.il~rCR-Doj z 1428" Ca.

IDena~

A)aM [] CGrn Bo~h SranArea jj.vet lj to Wxeld Ca'bratltn Reference Chek Calibration Data Sheet Da!a Sheet 9 12 UT4I1E Papg 5 of Cal. Checks ntia Ca!b.

lnit,a Calib. Date Internediate Interned6ate FinallClb.

F:na'C.b Dale TIme 1,147 IVA IVA 1445 Couplant RorpaS Bbo k' IC4874 Ref Refectcr SOH Type ULTRAGEL II BatcO:

06225 Recordabloe EXm Access Indications Exa*r nav'r Areal ','Ve'.JI Yes INo fGoomI n

Search Unit#1 Manufacture:

KRAUTKRAIER Serial No.:

01BXV9 No. of Elemen-s:

1 Size:.5 x 1.0' Shape: RECr.

Freq. 2.251,1Hz Style:

GAMMNA ExamJgle:

60o' Mode: SHIEA.R Measured Angle-60" Wedge Slyle.

NON INTEGRAL Search Unit Cable Type:

RG 174 Len~h:

12" NoolCon.:

0 Instrument Settings Make I Model. KRAUTKAER USN OOS' Selal No.:

SAP 105205 Probe Delay: 15.m3RaRge 1428 MT Call Vel'.1266 1

,31 r.s SQUARE Damping

-OA 0 Re/ed:

0%

PRF: AUTCIIGH Freq:

2.25 MHz Fillr:

FIXED Mode PIE Ret~ly:

RFLLLMAV Voltage:

450 Pulse Widit:

220rs Re!erence Sensitily (Sens.)

AAiAt: 63.5 dB Circ.

N/A SDHN SFni~wVy: 476dB CRT Div.ISDH 1.

• t Manufacture:

No. of Elements:

Exam Aole:

Mode:

Mleasurod Angle.~l Wedge Style.

LeNh I

No.0of Con.:

I strument Settings FraeqItec. t~A1t~E S

NO!

ebProbe0 ay __Range CM0 Cal Vet:

Patscr:____

DWdam Re*

ed:

IPIRF:

AUTOHIGH Frog:.

TPer.

Moe RG it7 RIRed

'y _ _ _Vottage:

ReL. Sensth y (Seons)

S l

N lenti~

Settings T DiYJSDH TCX-i-31CC 1t BOTH X

75 dB Remais, Reson for Ircomr'ene Scar(s)

COJPONEWI TEMtP IF 69% EXAN,1AT ION COVERAGE ACHIEVED Einmrprs.15il BELL Aý,

.i_&' LnetIre D1_ate.9 f NrA \\J eet N/A Date NIA Re~ie.%rs FutherEvaLut~ionflertred? [lyes IjNo REVEfWERICAiO e.§-4 5,/

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 r

a..#

12 UT-017A

_/"p m L-(0 L

Sa~o COA~ovCM:PFAX Uar..__

Outager 2R,1_1 t-voctxrt v tXISr :FI sysl~q S'i-tv*j "Nedi A 1-I Rtýrjor,.

-ýr4 VIA 60' Of18M'9 of Omr~R 8

JF-RZLAF.tMFJ

-00!1 rClc%

)

_ee~

Data CWOW*tI'1 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 2ir!r 2U T-017H 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.

DOt.

C4f~ld1 7

.1/

~o~.o* ii _________

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 S-cct R5&2 I"

2T-J 1TO7 SLtr co*A&Nhc*. PEnAI Ujnt. 2 Ou-+/-L.e r.

ZRF1.Z P:ccd.re 'jS TXIS-212

-t'or-7 rac.

N, r.S~

l S1IAF.1

4SI~u Wel.

C I

3ýM:eý nti-R X \\JB I0 a

Z

~,'

• 13~~

.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 vVEST1INGHOUS-NUCLEAR SEVCES DIVISION LIMITATION TO EXAMINATION PLANr Coir iChC ped UNIT 2

SKlET*h

,ySrIC,'-

REACTOR.COOLANT PROCEDUR.E EXAMAikER M:,ot, W. Afldt iEVE 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 OFZ CF LIMITATi0N CQP

':G jLE P.EPORT M:)

UT-OO-021

=AGE 2

F CP

?

TCX.1-210C TYA-SI.2iC Rmo' 4 FC NJA I0'5J700C 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

.3.1% no mm SJ.WtUI.

31 acI00 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 I..

I',

b

÷

• 'I: -

.ii

-74

31)

F' k". 6D eIr /

IT

~

FL

_se LjEV 4 Th~. dA.

94;~

• 1~~

A1

- -7I-100 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 C

,S.E

.lV03 J trttIUSIJ

-a

c IsaK I-i 1 1.6)?2 I' Bit to1812 4.!! 13 4ll 48V II ).83.

I '

20 41C

('I"6. f~ *2 I 0.51-Nil *1,~

'.21214 1.1 NOZZLE I145126 S:ITII::

,LUSIM1r1 M.* DO4 DESCRIPTIONJt SIEAIJ GEIJEROCP.S 1.2.3 4 ITUBES IDEI 5.3/SA.508 IVEAOSIU0E)

.rS-216 iSOL I 11,43 1.615' 01&U116.1 I* LENGTI TU ELECTRIC 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 Summary No 011700 Workscape ISi Piocedu!e Procedure Rev Wom Order No TX-ISI-2I0 4181105 Oj:age No 2RF13 Feperl Nao UT.201205S Page I Of 8 Co'e ASME Sec. XI 1998EdJ2000 Add.

Calijte' B-.B112.40 Location 2.1541, RB, 812 D.a.,nm No TCX-i-3100 Decrnpin SG4 CHANNEL HEAD TO TUBESHEET 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 Axial Orientated 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' USN SOLSW L reaiy L-2012-004 Srze 1." Dia Moel:

CompnG nter0Cal 1037 1 2012 114 T 82 1.5 1.36 De!a 0

Ra'te.

9.09 F eo 2.25 MHZ Cener Freq :

1.97 MHz [ter r.

1/2 T 81 3.0 2.72 Inter Co.

314 1 0

45 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 Oamprrg 508 Ohms R;eto 0%

feasired Angle 0

Mode.

Shear

-Ci_10 1n N/A PRF Auto High SU Frtq 2.25 MHz E;,,,.n I A

ee ofEements 1

-r_____

CaN Bat:h.

07225 Circumferential Orientated Search Unit Fro;evecy 2.25 MHz Rc1 2i.

Fut~wavn Ccr fu 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 Wedge S,'&-

NIA WA N/A A. Gain (d~l 8.9 C rc Ga ' id5) 8.9 Search Unit Cable p

U lINIA 10 Saeer O. = 9.09 0 Of Sound Path Tice RG-174 Length. 12 No.Conn.. 0 MTy..

Senoteck N/A Calibration Bloc, Scan Coverage NIA Cal i*c.A NO TBX-28 Uptrean.m o'

• ,trea-n'

,Scan dB. 18.7 Reforence Block Reforencelimutatof Block 0S Serial No.

1078 Gain Signal Sweep P'tt.ress 5.45 Da 0

CV!

CCW

• ScaOdB dB Relletor Ampitude % Diviron Sound Path C9 Terr 9S lerrnt too' RF2425 Fya, SLKca 00 Type Rompas Block CIS 8.9 SDH 54 0.9

.8,4 Cc."np Temp 97 terrp Too RF2425 Suram Col.lon Flush Recordable Ind'cation(s):

Yes NO 7 (if Yes Rel Attached U'trasonic Indicatlon Repore.)

Comments 77.5% CODE COVERAGE ACHIEVED

Rcvurfi, Acc.apt

[V' Ren Itor.

Prcc:t O Coeeagcy Ob:3=d

1.

O 077.5 Revez*ad Pre,,;a s Data Yes bamrrie; Le-,el 11

)Ziglatoe Date Reviewer D.Sa~t~"

ale Fang, Chia Wei 10/1612012 Sabo, Steve

/.

A.-

ole, Leve, lilA Signatare Date Ati ReV.ew giialure Date 111A

Ballard, Jack Mill

(

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 Sun'.maýY No 011700 Workscape 151 ProMedUrt Procedure Rev" Wedt Order No lO4St. 210 7

4181105 Outage N1o.

2RF13 Report No UT-2012-055 Page 2

of 8

Code ASME Sec. X11998 Ed02000 Add.

CatAlem' 843182.40 LocraoA 2.154L, RB, 812 0r1`4.73 Nto TCX.1-3100 Deoz.ltion. SG4 CHANNEL HEAD TO TUBESHEET 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 t Instrument Settings Search Unit CaL Time Date Axial Orientated Search Unit So arto 105421 SerAl No OIBXVF Checks

-Ca lbration S ia l U.Ia-J'omrer CGEI'l

,an.aclurer KBA Intial Cat. 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 4

1/AT 80 1.5 1.94 De'ay 11)085 Ran;e 12.95 Freq 2.25MHz CenteiiFi 229M~z Intel Ga.

112 T 45 3.0 I

.88 Mt caie..

0.1261 Pý' 7e Square Exam ge 45 Angle NA Intel Cal Yt4T 30 4.5 5.83

_t _

_,. _._25

_Squre F,

SqCin:krgi NA F

1309_1011611 H

12 Carp j

g:

500 Ohms Re.d 0%

M.easured Artge 45 Mode Shea1 NOTCH 12 1.00 Pfl Auto Nigh SC Frr 2.25 MHz ExI P,,,,

0.65

1. 0O ;Emrents I Ceuplant 1114 T 1 9

1 10.0 12.95 F'cTJenCy 2.25 MHz Feey.

Fullwave S

oc Cal Balch 07225 Circumferential Orientated Search Unit

'*..2 z

ey.

Cor*9 Single Fcs N/A o'a.ac.

450 Pulse 7r~t.

220 CType Ultiogel II Caibrabon S inal Sweop Shape RECT

__or _

NA Mfg Sonntlh ReI*,~ot Amplt,,de e11 v,,

p ath Ar Gar 1dB).

39 C c Gar dE)

WA Se a UnitoCal Exam Batc 07229 NiA 1 Mal ScreenCv - 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

Cal B':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 dl oRnI Signal S,,eep

%oDd Pat Ca Bk tetmp 95 Ternp Tool RF24t2S EvarSriace:

O0 Type Rompas Block C/S S

Cc!p Ternp 97 ereip 0ool RF242S Surface Ccnd*lrn Flush Recordable Indication(s):

Yes -

No 7 (If Yes, Re! Attached U.,asnni: I, cat.rtn Report.)

ReS'It Accept y Ree:t -

Ino -

Comnmenrs T7.5%

CODE COVERAGE ACHIEVED Percel Of Co;,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,'e2 Sabo, Steve

/)nRe (Date Exarni-or Level N/1A s~rnal.re Dale S:Ie Review Dgam

~ ~ale MIA IS Enginneer(

~ i I.

Oti"o Level NIA SýIralore Dafe ANOI Review Uw~'au

~

/

De 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 S,:eAJr t CPNPP Sumnmary Ito.

011700 Warkocopi SI UT Calibrat i amination Procedure-Procedure Rev WOa OWer No 1X-tSI.210 4181105 Outage No 2RF13 Report No UT-2011-055 Page.

3 ol 8

CqjP ASME Sec. XI 1998 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 TO TUBESHEET 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 Ftnrsh time 1229 Instrument Setlings Search Unit Cat Tuee Date Axial Orientated 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~%La 091 16/12 Reector Amplpude 1, D:zslon MLWol USN 60 SW L reawly.

L-2012-001 Sze 0.50" X 1.0" Model: SWS 103S 1612012 114 T

1.5 2.778

Dcxa, 15.7069 PRaee 18.52" Fieq 2.25 MHz Cen'.e Freq.

2.27 MHz I a~f ja112 T is 3.1 5.7412 11ti Ca Vel 0.1274 PLt, fC;e. Square EarnrAngle 60 SquinlAngle N/A

/4 I

T 4.5 3.34 Dampirg 100 Ohms Rtjed 0

t.M._

ea*eArg'e 60 Mode. Shear Notch 5.8 11.55 PRF

,uto High SU Freq 2.25 MHz Eoyt FoAt 0,7 4 of Elements I

Couplant 5241T I 2

7.2 14,366 Fuv%)

2.25 MHz it-i FullwarSe Cal Bach 07225 Circumlerential Orientated Search Uni:

Fqco

.5Mz R,'y Cool-.

Single Focus:

Ilia Vc r3ge 450 Pu ' 1 220 Rond C

N Type.

Ultragetl l Calb.alon Si~ngl S'Tepe V' -Sape Round Con.r NIA latg" Sonotech Re-r A-plude%

n Sound Path Wedge Stye.

Non4Frtegral N/A I

A. Gon cB) 45.8 Crc Cai :dB1 0

Searuh niteal Exam Batch:

07225 1WA 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 ig M

Sonotech Calibration Bloc.

Scan Coverage NIA C:1 8c6:. No TBX-28 Ups!tEamrt -

i*.sream j ScandB 69.8 Reference Block Reference/Simulator BIock

-Gain Signal STep Somod Pathn

,[iceos 5.45 Cia 0

CW*

CCWV4 ScandB 69.8 Senal1lo0 104879 GaenB Re JSector A..pliu Division Ca' 01,, Terp 95 Tcmp Too:

RF2425 Eam Surface.

OD Type Romnpas Btock CIS 45.8 SON 90

.4 0.740B Cc'rp Temp 97 Temp Too' RF2425 Surface CenAdron Flash Recordable IndIcalton(s):

Yes No q

ýlf Yes, Ret Attached UWrasonc:

rndication Report Res-'s Accept i R,e.t Into Comnens 77 5% CODE COVERAGE ACHIEVED PacE"-t O Coverage Ottato ned> >

NO.71.5 Revened Pre.-,.eus Data:

Yes Evamniner Levet it-PDI iotr Date Reeenn m~rs Date Vidrih, Tomaz 1011862012 Sabo, Steve

/o/ 4 //

Exa'i-er Leve' N./A SI atum Date Ste Reviow".

Dote N/A ISI Engineer 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 Revnd No UT.2O12.Ota Page:

5 C1 8 Summary N 011700 ketch ur P110:0 0 IJS1A2Rr 13 DlrasmlS ecM.MTCA',I 31CO-4-I PR0~iLE 8 jog l~L

.1

• ~

I I.

.1 Ii 1..

-I I..,*,JI TCX-1-3100-4-1 4--

I

.1.

III I,

I

• ~ -.

/'

'I'

'I

• s e Aqa 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 or Phc,.o 0 JSF,2RF 13 Dafahei Sca%1CCAl-31CO-4.!

PROF LEO 8

iiI IIT

.4 Ii

.11 I

F d 1 l~/

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 13 0o.*ose1 ScrrsfTG.X.

.3*0O Bearn Sp~e~l J 5 i TCX-1-3100-4-1

, \\,

!7 N.r'z

\\-Z

,2, R

• ~ ~

C

\\

ý

,,,,XwCE Ofv

.5 L

,*A~L i'4 q7

Supplemer.

jort Rppolt No UT.20l2-Otio Pawa 7

of Su¶mlnory No 011700 mr 00 (D

(D Skctdi o-Photo:

0 ¶Sfl!00- 3 UDA~hr-Scarsl L-A--3100-4-I Heam Sprew 50 pg TCX-1-3100-4-1 I

45 a;

0" oi 0o

/

.C 7fR,4NV-STfCCA AAJC$6 to TXX-14103 Page 14 of 14 Weld Exam Page 9 of 9 10CFR 50.55a Request Number B-13 Relief Requested In Accordance with 10CFR50.55a(g)(5)(iii)

- Inservice Inspection Impracticality -

Limitation Record Siteakhr CPNPP 2

rnlary?40 011700

• otkSCooe I

Prozedire Rev Wou1ý Order No TX-ISI-210 7

4181105 Ou.,-Ige No 2RF13 Repor, No Ut;-2012.055 Pawe a

of a

r -t,,r

.- - z.:

-ý..

- t C

\\

\\

\\~, \\~

N

~

N

~

F ~

V 4-

/./-

4C>(-vT*1CA-4 N

e(

i-

/- F7CTAL-1C 2-~"

~

Limitations fe'rO4 reluiremcnens Radiatio. fed