Text

Response to Request for Additional Information - American Society of Mechanical Engineers Code Required Weld Inspections Relief Requests (TAC Nos. ME4220 Through ME4223)
	ML103550157
Person / Time
Site:	Calvert Cliffs
Issue date:	12/16/2010
From:	John Stanley; Constellation Energy Nuclear Group, Calvert Cliffs, Constellation Energy Group, EDF Group
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	TAC ME4220, TAC ME4221, TAC ME4222, TAC ME4223
	Download: ML103550157 (199)
	v • d • e

Calvert Cliffs Nuclear Power Plant CENG a joint venture of Constellation

'eDF Energy*

1650 Calvert Cliffs Parkway Lusby, Maryland 20657 CALVERT CLIFFS NUCLEAR POWER PLANT December 16, 2010 U. S. Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:

SUBJECT:

REFERENCES:

Document Control Desk Calvert Cliffs Nuclear Power Plant Unit Nos. 1 & 2; Docket Nos. 50-317 & 50-318 Response to Request for Additional Information -

American Society of Mechanical Engineers Code Required Weld Inspections Relief Requests (TAC Nos. ME4220 through ME4223)

(a)

Letter from Mr. J. J. Stanley (CCNPP) to Document Control Desk (NRC) dated June 30, 2010, American Society of Mechanical Engineers Code Required Weld Inspections Relief Requests (b) ' Letter from Mr. D. V. Pickett (NRC) to Mr. G. H. Gellrich (CCNPP),

dated October 13, 2010, Request for Additional, Information Re:

American Society of Mechanical Engineers Code Required Weld Inspections Relief Requests - Calvert Cliffs Nuclear Power Plant, Unit Nos. I and 2 - (TAC Nos. ME4220 through ME4223)

In Reference (a), Calvert Cliffs Nuclear Power Plant, LLC submitted relief requests RR-ISI-24, 25, 26, and 27, for Calvert Cliffs Units 1 and 2, requesting relief from the performance of American Society of Mechanical Engineers Code required weld inspections that were scheduled to be performed during the recently completed Third Ten Year Inservice Inspection Program Plan period.

In Reference (b), the Nuclear Regulatory Commission requested additional information be submitted to support their review of Reference (a). Attachment (1) provides the responses to the Nuclear Regulatory Commission's request for additional information contained in Reference (b).

Ab`47

Document Control Desk December 16, 2010 Page 2 Should you have questions regarding this matter, please contact Mr. Douglas E. Lauver at (410) 495-5219.

Manager-Engineering Services JJS/KLG/bjd

Attachment:

(1)

Response to Request for Additional Information - Relief Requests ISI-24, 25, 26, and 27

Enclosures:

I Relief Request [SI-24 for CCNPP Unit I Class I Components 2 Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components 3 Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components 4 Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components cc:

D. V. Pickett, NRC Resident Inspector, NRC W. M. Dean, NRC S. Gray, DNR

ATTACHMENT (1)

RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION -

RELIEF REQUESTS ISI-24, 25, 26, AND 27 Calvert Cliffs Nuclear Power Plant, LLC December 16, 2010

ATTACHMENT (1)

RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION -

RELIEF REQUESTS ISI-24, 25, 26, AND 27 The numbers assigned for the request for additional information reflect the numbers used in Reference 1.

NRC RAI 2.1.1:

2.1 General - Additional Information Required on All Requests for Relief The licensee has provided only general, and somewhat vague, information regarding impracticality of obtaining ASME Code-required volumetric examinations. Statements such as "physical barriers and scanning surface," "component configurations, " or "curvature/taper, " are inadequate to describe the bases for not obtaining the ASME Code-required examination volumes. No sketches with dimensional' information showing the causes of limited accessibility have been included.

2.1.1 Please provide detailed and specific information to support the bases for limited examination in all requests for relief, and therefore, demonstrate impracticality.

(a) Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

(b) As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility, limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

(c) Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

(d) Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Calvert Cliffs Response RAI 2.1.1:

The requested, specific, information to support the bases for limited examination is provided for each of the individual relief requests in the following enclosures: - Relief Request ISI-24 for CCNPP Unit I Class 1 Components - Relief Request ISI-25 for CCNPP Unit I Class 2 Components - Relief Request IS1-26 for CCNPP Unit 2 Class I Components - Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Each of these enclosures provides responses to RAI 2.1.1(a-d) and provides detailed sketch(es) for each of the applicable welds that were listed in Table I of the original relief requests (Reference 2).

For some of the welds, the examination coverage percentage values calculated in the above enclosures are different than the coverage percentage values that were listed in Reference 2, Table 1. In those cases, the values in the above enclosures take precedence as they reflect additional reviews and revised calculations performed since the original submittal.

Over the 10 year ISI interval several different ultrasonic examination procedures and vendors were utilized. This created some differences in how volumetric coverage was calculated.

The revised volumetric coverages provided in this response reflect a standardized calculation approach applied to all welds and is aligned with current industry practice for performing these calculations.

NRC RAI 2.1.2:

It is unclear whether the licensee used the appropriate ASME Code requirements for the examinations.

In Section 4 under the individual component descriptions of Attachments 1 through 4, the licensee stated that for all examination categories contained in the requests for relief the NDE techniques and procedures incorporated (or were similar to) examination techniques qualified under Appendix VIII, In I

ATTACHMENT (1)

RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION -

RELIEF REQUESTS ISI-24, 25,26, AND 27 Section 6, Paragraph 3 of Attachments 1 through 4, the licensee claimed that ultrasonic procedures complied with the requirements of ASME Section V, Article 4 and the personnel were qualified in accordance with ASME Code Section XI, Appendix VII. Please identify the ASME Code requirements for procedure, equipment, and personnel qualifications used for examination of the subject welds.

2.1.2 Please state the actual ASME Code section that was followed for each Examination Category. If Appendix VIII-qualified techniques were applied to Examination Categories B-D, C-A, and C-B, please discuss whether this alternative was approved by NRC.

Calvert Cliffs Response RAI 2.1.2:

Calvert Cliffs Inservice Inspection (ISI) inspections were performed in accordance with the 1998 ASME Section XI (no addenda) as amended by 10 CFR 50.55a and Regulatory Guide 1.147. In 2003, Calvert Cliffs implemented a risk informed inspection program for Class 1 and 2 piping welds (examination categories B-F, B-J, C-F-i, and C-F-2). These risk informed category designations were reassigned to reflect those established by Code Case N-578-1. Appendix VIII qualified techniques were not applied to Categories B-D, C-A, or C-B.

Per Calvert Cliffs procedures and the 1998 Edition of ASME Section XI (no addenda) Code, the following applies:

Ultrasonic Procedure and Code Description Equipment Requirements per Personnel Category IWA-2232 (ASME Section XI, Qualifications Appendix 1)

B-D Full Penetration Welded ASME V, Article 4, as ASME XI IWA-2300 Nozzles in Vessels > 2" supplemented by Table 1-2000-1 C-A Pressure Retaining Welds in ASME XI, Appendix III, as ASME XI IWA-2300 Pressure Vessels < or = 2" supplemented by Table 1-2000-1 C-B Pressure Retaining Nozzle ASME XI, Appendix III, as ASME XI IWA-2300 Welds in Vessels < or = 2" 1 supplemented by Table 1-2000-1 R-A Risk Informed Piping Welds ASME XI Appendix VIII ASME XI Appendix VII NRC RAI 2.2.1:

2.2 Requests for Relief ISI-24, ISI-25, ISI-26, and ISI-2 7, Examination Category R-A, Items Ri. I],

R1.16, and R1.20, Risk Informed Piping Examinations (Units 1 and 2) 2.2.1 In addition to the specific information requested in Item 2.1.1 above, discuss whether alternate welds could have been examined to address the reduced volumetric coverage resulting from the limited examinations of the subject welds.

Calvert Cliffs Response RAI 2.2.1:

The Third I 0-Year ISI Interval for which Calvert Cliffs is requesting relief is the first interval in which risk informed methodologies have been applied at Calvert Cliffs. The Calvert Cliffs risk-informed approach was developed in accordance with Reference 3. In the development of risk-informed selections done in accordance with the process outlined in Reference 3, it was foreseen that relief would be required for any risk informed ISI piping element selection for which greater than 90% examination coverage is not achieved (see Reference 3, Section 6.4). This is especially true in light of the fact that it was 2

ATTACHMENT (1)

RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION -

RELIEF REQUESTS ISI-24, 25,26, AND 27 recognized that welds would be selected which had never previously been ultrasonically examined under our station's ISI program. For welds that are subject to a degradation mechanism (Items RI. 11 and R1.16) those welds were selected for examination on the basis of predicted degradation severity; often at locations inherently more difficult to obtain coverage on, e.g., a pipe-to-valve weld. The methodology used in Reference 3 states that less than 90 percent coverage at the location most susceptible to a potential degradation mechanism "will yield far more valuable information than 100 percent coverage of a less susceptible location". These insights were used by the "expert panel" convened by Calvert Cliffs to make the original element selections for the program, fully expecting that relief would be required for some welds, rather than picking less susceptible welds for which greater than 90 percent coverage could be obtained. It was also recognized, for Calvert Cliffs Units I and 2, that when alternative location welds for Items Ri. 11 and Ri. 16 were available with the same degradation mechanism they were typically of the identical configuration in a sister piping loop so no improvement in coverage would be achieved by selecting them.

For welds which are not subject to a degradation mechanism (Item Ri.20); Reference 3 recommends selection of welds for examination "be focused at terminal ends and structural discontinuity locations of high stress and/or high fatigue usage". These were the guiding principles used by the "expert panel" convened by Calvert Cliffs to make the original element selections for the program, again fully expecting that relief would be required for some welds, rather than picking less stressed weld locations for which greater than 90 percent coverage could be obtained. This follows the fundamental tenet of the risk-informed approach that less than 90 percent coverage at the location more highly stressed, and therefore more likely to undergo inservice degradation, will yield more valuable information than 100 percent coverage of a weld at a less stressed location. In cases where a known physical obstruction, like a pipe hanger, was identified which prevented examination of a selected weld a more suitable, preferably equivalent, location was chosen.

Conversely, geometrical configurations, (e.g., valve taper, angled penetration, tight radius elbow), and/or material type, (e.g., cast stainless steel safe ends), were not used as bases for selecting alternate locations even if limited coverage was expected. While the above types of weld configurations make-up the vast majority of welds for which relief is being requested, they represent only 13 percent of the total number of Item Ri.20 welds selected for examination (i.e., for the remaining 87 percent of Item Ri.20 welds the examination volume coverage exceeded 90 percent). For those welds with a cast stainless steel component; even though American Society of Mechanical Engineers (ASME)

Code coverage was not credited for scanning performed from the cast stainless steel safe end side of the weld; if the geometry allowed it, volumetric coverage of that side was obtained using the ASME Appendix VIII procedure (PDI-UT-2) qualified for non-cast stainless steel product forms.

Even though it was impractical to meet the ASME Code-required 90 percent examination coverage for these welds, the nature of the limited coverage did not generally prevent the most critical area, the internal diameter surface at the weld root, from being insonified from at least one direction: Therefore, a service-induced defect, if present, would likely be detected even though the Code-required volumetric coverage was limited. In addition small gaps in the internal diameter coverage occurred at azimuthal locations where transducer access was restricted, e.g., at angled "stab-in" branch connections and at the intrados of tight radius elbows. As part of the defense in depth approach, all the welds in the risk informed program also received, under the System Pressure Testing Program (Category B-P), a VT-2 examination for evidence of leakage during each refueling outage. No leaking piping welds have been encountered under this testing program.

3

ATTACHMENT (1)

RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION -

RELIEF REQUESTS ISI-24, 25,26, AND 27 REFERENCES 1

Letter from Mr. D. V. Pickett (NRC) to Mr. G. H. Gellrich (CCNPP), dated October 13, 2010, Request for Additional Information Re: American Society of Mechanical Engineers Code Required Weld InspectionsRelief Requests - Calvert Cliffs Nuclear Power Plant, Unit Nos. 1 and 2 - (TAC Nos. ME4220 through ME4223) 2 Letter from Mr. J. J. Stanley (CCNPP) to Document Control Desk (NRC), dated June 30, 2010, American Society of Mechanical Engineers Code Required Weld Inspections Relief Requests 3

Electric Power Research Institute, Revised.Risk-Informed Inservice Inspection Evaluation Procedure, TR-1 12657, Rev. B-A, December 1999 4

ENCLOSURE 1 Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Calvert Cliffs Nuclear Power Plant, LLC December 16, 2010

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.1 10 Responses to Request for Additional Information Summary No.: 004050 Comp ID: 4-404 Page 1 of 11 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

PZR Surge Nozzle to Lower Head / Due to nozzle configuration, coverage of nozzle side base metal and weld was limited. The pressurizer nozzle-to-vessel head welds are accessible only from the head side based on the nozzle curvature. The scanning surface of the nozzle is essentially perpendicular to the head surface which prohibits the ultrasonic wave entering the Code required examination volume at an angle that will interrogate the weld volume for in-service flaws. The nondestructive examination (NDE) techniques and procedures used incorporated examination techniques qualified under Article 4 of Section V of the ASME Code as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 1 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.110 CCNPP Component ID:

4 -404 NDE Report No.:

CC04-1U-014 LTP No.:

004050 Summary No.:

004050 Coverage Sketch No:

1 MO No.:

1200300701 Exam Area:

Weld Metal / 33" Scale:

50%

Exam Angle:

450 (Sketch Resized for Relief Request)

Page 2 of I I Diameter: On Head Thickness:

4.40" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Nozzle7 I

19 45 T Coverage for 33" = 232.3 in'

. Weld Metal: Volume =

. 520.96iCubic Inches I _

Coverage Beam Percent of Beam No.

Angle Sketch (Cub. In.)

Total 520.96 1

232.30 492.90 94.61%

1 45=,

2 260.60 2

45°J 3

106.60 106.60 20.46%

3 60o 54 238.630 520.96 100.00%

4 60*,

6 154.00 154.00 29.56%

5 450.-

7 520.96 520.96 100.00%

6 45'-.

7 520.96 520.96 100.00%

7 60*-

7 520.96 520.96 100.00%

8 60'--.

7 520.96 520.96 100.00%

9 0° WRV 7

520.96 520.96 100.00%

Toa 64-.

° Total Beams: 9 Total Pecet:I 744.64%

t 1

Total Weld Metal Coverage:: 82.74%

______Base Metal: Volume =

1432.64iCubic Inches Coeae_._.Be, am, Percent of Beam No.

Angle Sketch (Cub. In.)

Total 1432.64 8

586w08 88&85%

1 +2 45*/60'7*

9 686.75 1272.83 88.85%

3 45'--

10 716.32 716.32 50.00%

4 45'-.

10 716.32 716.32 50.00%

5 60'-

10 716.32 716.32 50.00%

6 60'--

10 716.32 716.32 50.00%

C7 0'WRV 10 716.32 716.32 50.00%

TotalI Beams: 7 Total Pe~rcen~t:

....427.69%

S --.

Total Base Metal Coveraae: :

61,10%

I Combined Coverage Total el Meal20re.96.

1953.602.6 SBase Mtl61%1432.64 195344.81

.................. j...........

...+......................................... i...................................T o a E a m C v e a g i

6. 7 I.

Page 2 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.1 10 CCNPP Component ID: 4-404 NDE Report No.: CC04-lU-014 LTP No.: 004050 SummaryNo.:

004050 Coverage Sketch No:

2 MO No.: 1200300701 Exam Area:

Weld Metal / 41" Scale:

50%

Exam Angle:

45' (Sketch Resized for Relief Request)

Page 3 of 1 Diameter:

On Head Thickness:

4.40" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Shell Nozzle I

E 45' t Coverage for 41" = 260.6 in' Weld Metal: Volume =1 520.96 Cubic Inches Coverage Beam Percent of Beam No.

Angle Sketch (Cub. In.)

Total 520.96 1

451T 1

232.30 492.90 94.61%

1_ _

45_

2 260.60 2

45°,

3 106.60 106.60 20.46%

3 60'T 5

283.30 520.96 100.00%

4 60%*

6 154.00 154.00 29.56%

5 45°-

7 520.96 520.96 100.00%

6 45"--

7 520.96 520.96 100.00%

7 60'-

7 520;96 520.96 100.00%

8 60*-

7 520.96 520.96 100.00%

9 0" WRV 7

520.96 520.96 100.00%

Base Metal: Volume =

1432.64 Cubic Inches Coverage........

Pern.ercent of Beam No.

Angle Sketch (Cub. In.)

Total 1432.64 1+12 45"/60!J 8

586.08 1272.83 88.85%

/

9 686.75 88.85%

4b0*

1u (1b.-J flb..i2 bU.UU"/.

I

.- ~

I

.1 I

I

~

I.IIII~;

4 IV llb.32 716Z.32 I bu.Uu%/n I

.1i I

.1 I

.1111 I

11171 I

117111 5

60W-10 716.32 716.32 1 50.00%

6 1 60*--.

10 716.32 716.32 50.00%

7 1 0" WRV 10 1 716.32 1 716.32 50.00%

Total Beams:

Total Beams: 9 Total Percent:

4 74464%

T..al

...W..

Response

PZR Surge Nozzle to Upper Head / Due to nozzle configuration, coverage of nozzle side base metal and weld was limited. The pressurizer nozzle-to-vessel head welds are accessible only from the head side based on the nozzle curvature. The scanning surface of the nozzle is essentially perpendicular to the head surface which prohibits the ultrasonic wave entering the Code required examination volume at an angle that will interrogate the weld volume for in-service flaws. The nondestructive examination (NDE) techniques and procedures used incorporated examination techniques qualified under Article 4 of Section V of the ASME Code as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

, This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 12 of 78

Enclosure I - Relief Request ISI-24 for CCNPP Unit I Class Code Category B-D -

Code Item B3.110 I Components CCNPP Component ID: 4-405 NDE Report No.: 2000BU028 LTP No.:

004100 SummaryNo.: 004100 Coverage Sketch No:

1 MO No.:

1199904203 Exam Area:

Weld Metal 360' Scale:

50%

Exam Angle: 450 (Sketch Resized for Relief Request)

Page 2 of 9 Diameter:

On Head Thickness:

4.40" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Nozzle 45°1 Coverage = 419.16 in' of 420 in' exam area = 99.80%

Coverage Dimensions..

.Beam Directions ua real h

Wdh....

51.

x Thicknes (Cub.ar Nozzle I~

T--

-84:5

~

1470.00 ~~/r~nN~~:

.Wel..

se 5 1851 4 5 420.00.1.

Ci.o...

ckse S

l. i I...........

o i

.... i ~ i i i 5 1 :8 5..................

i 8 4.5......................4 210 0..................

w is e :

i i -

I..........

.............. ].........................

Weld Metal: Volume 420.001Cubic Inches overage.rag Bea.m

....percent o Beam No.

Angle Sketch (Cub. In.)

Total 420.00 1

45-1 1

419.16 419.16 99.80%

2 45%

2 66.37 06.37 15,80%

3 0°[

3 418.44 418,44 99.63%

4 00° 4

35.00 35.00 8.33%

5 45°.

5 390.83 390.83 93,05%

6 45*-

5 390.83 390083 93.05%

I Base Metal: Volume = I 1050.00CCublc Inches Iov g

Bem percent o!

Beam No.

Angle Sketch (Cub. In.)

Total.

059.09 1 + 2 45'/60°11 7

907.09 907.09 86.39%

86.39%

3 45'-

8 525 525 50.00%

4 45*-

8 525 525 50.00%

5 60'-

8 525 525 50.00%

6 600-8 525 525 50.00%

7 0° WRV a

525 525 50.00%

Tr TotlBeams 7 Total Percent 422:78%

Total Base Metal Coverage 60 40%

7 60 -

390.83 93.U5%

a 6,-.

390.83 390083 93.05%

9 0' WRV 0

420.00 420.00 100.00%

I Total Beams: I9 Total Percen :, 695.781 total Weld Metal Coverage:I 77.31%

i Coverage Total PerlntI

'willm Volume 6

Result' Weld Metal 77.31 %

420.00 1470.002

&06?.

Base Metal 60 40%

11050.

147.0

.. do4 T.......

!!2

...............l.........

....i...............*...............r...........1.................-

l I

Total Enram Cavýeraae=L.3%

Page 13 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.1 10 CCNPP Component ID:

4-405 NDEReportNo.:

2000BU028 LTP No.:

004100 Summary No.:

004100 Coverage Sketch No:

2 MO No.:

1199904203 Exam Area:

Weld Metal 360' Scale: 50%

Exam Angle:

450

.(Sketch Resized for Relief Request)

Page 3 of 9 Diameter:

On Head Thickness:

4.40" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Shell M

450, Coverage = 66.37 in3 of 420 mn exam area = 15.80%

Coverage Dimenslons Beam Directions LWýin f' gWidth Thi-ckness (C 7tl0 Welam Aretai 51.65 18 r:~ 1420.00 Awy ra ozzle:vtsa 0........

-Bass Metali 51.6450:51 1000.00.Counter Clockwise:-

e....

.. ase

.."'2'igtf "'*

7 Waet olt:

'"fii*°-"

'":'(~~ 'f."....."t*

i" ~

'a.

. T -s 1-Weld Metal: Volume =:

420.00, Cublc Inches

-Coverage.

Beam Percent of j.eam No.

Anqle Sketch

.Cub. In.)

Total 420.00 1

45°1 1

419.16 419.16 99.80%

2 45°1 2

66.37 66.37 15.80%

3 60° 3

416.44 418.44 99.63%

4 60-1 4

35.00 35.00 8.33%

5 45"-

5 390.83 390.83 93.05%

6 45"-

5 390.83 390.83 93.05%

7 60*-

5 390.83 390.83 93.05%

8 60*-

5 390.63 390.83 93.05%

9 0 WRV 6

420.00 420.00 100.00%

Total fenr 6ý Toa P~re-'

600.7J6%

Total Weld Metal Coverage e 77.31%

Base Metal: Volume 1 1050.00tCubic Inches eam Percentoa Beam No.

Angle Sketch (Cub. Ia.)

Total 1050.

1 +2 45 "/60fT1 7

907.09 907.09 86.39%

86.39%

3 45'-

8 525 525 50.00%

4 45*-

6 525 525 50.00%

5 60*-

6 525 525 50.00%

6 60-*

9 525 525 50.00%

7 0' WRV a

525 525 50.00%

I..~.....

7*71 I j Total Beams 7.

Total Percent:

422;78%

.... 2........2.....4 I

Total Base Metal Coverage::

60.40%

Combined Co v....

Coverage.

]

Total PZ6Tentý`-i

-.- v I

Vlme-I Volume6 esl.

lJi ' **"

" # °°* ] ' o S

..... ' -R ~ ~ l.

Base Metal 60.40%

1050.00 I 1470.00

'[

T o

l aTotal Exam Coverage =

65.23%

Page 14 of 78

Enclosure I - Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.110 CCNPP Component ID:

4-405 NDE Report No.: 2000BU028 LTP No.:

004100 SummaryNo.: 004100 Coverage Sketch No:

3 MO No.: 1199904203 Exam Area: Weld Metal 3600 Scale: 50%

Exam Angle:

60' (Sketch Resized for Relief Request)

Page 4 of 9 Diameter: On Head Thickness:

4.40" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel

ý4 Nozzle E

60'T Coverage = 418.44 in' of 420 in' exam area = 99.63%

Coverage imensions Beam Directions Result Exam Area:,

51.85 6.3 4.5

.1470.00.

Away tram N zzlI WtMea.55*45 420.00 Clcws:

YBase Metal: i 51.8e1s 45 5

1 050.00 Conef6 chie~-

t..............

Weld Metal: Volume ei 420.00 Cubic Inches CvrgI Beam Percent ot team No.

Angle Sketch (Cub. In.)

Total 420.(0 1

45T 1i 419.16 419.16 5T9.80%/

2 45-I 2

66.37 66.37 15,80%

3 60°t 3

418.44 418.44 99.83%

4 860" 4

35.00 35.00 8.33%

5 45'-

5 390.83 390.83 93.05%

6 45'-

5 390.83 390.83 93,05%

7 600-5 390.83 390.83 93.05%

8 60*-

5 390.83 390.83 1 93.05%

9 0'1WRV 6

420.00 420.00 100.00%

A.................................

t.t.

W..

...tal....

ra.e 77.31%.

4*n Nnl 1 02 45'/60°Tl 7

907.09 1 907.09 Beam.....

Angle

... CovMee

(

Beam Perce nt of SBeam Na.

An toe Sketch

~ub.

In.

Ti:oa

...... 15 00..

I I 45'"

I 8

525 525 1 50 00%

-*1

=

7-7-

==22::

4 I 4 S-'

a 525 0.00%U 5

60'1 8

525 525 50.00%

8 80'-

8 525 525 50.00%

7 1 0' WRV 8

1 525 8 525 50,00%

Total Beams: 7 Total Percent: : 422.78%

Total Base Metal Coverape 60,40%

v I

OMmolee Lonorae i

lGaverage~

Weldý Metal: 77:31%

Base Metal -60.40%

-" ~

420.00...........

total t1470.00 22.09%

70.00 43.14%

To l m.

Tota Exam.........

Co e u 5w....

3.......

Page 15 of 78

Enclosure I -Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.110 CCNPP Component ID: 4-405 NDEReportNo.:

2000BU028 LTP No.:

004100 SummaryNo.: 004100 Coverage Sketch No:

4 MO No.: 1199904203 Exam Area:

Weld Metal 3600 Scale: 50%

Exam Angle:

600 (Sketch Resized for Relief Request)

Page 5 of 9 Diameter: On Head Thickness:

4,40" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel 1-Shell Nozzle S6001 Coverage= 35 in3 of 420 in exam area = 8.33%

Coverage Dimensions

-Beam Directions 5i Thick~iI~0iRs~ult I

Lený-gthn

-X

--iWi~dt*

['

x

,'-Thcl6....

=

(Cub. In.} l Toward Noz*i 1 J-1'470-00 Awa'-y Itm Nozl-E la m" eta:'*- 51.85 83

.c 4.5 4

0O lockwise: I Weld MeiailI; 51:85 1.5 4ý5 4

on

-uta

............. W ii

e~ ii - 1 8 '................. T "" :

- 1..

'" '*050 00 C ounte.....

r C lockw ise:

.i~ii[.......

.................. i...............

............... ea se M etal:

5 i 1 50 0 u i ; i i i

i i

5.........8.....

Weld Metal: Volame 420.00 Cubic Inches Cove-age Beam Percent of Beam No.

Angle Sketch ICu.b.C.

In.)

To6a 420.00 1

45T

-1 419.16 419.16 8 99.80%

2 45"1 2

66.37 66.37 15.80%

3 60em 3

418.44 418.44 99.63%

4 50-4 35.00 I 35.00 8.33%

5 45.-

5 390.83 390.83 93.05%

e 45*-

5 390.83 390.83 93.05%

7 60'-

5 390.83 390.83 93.05%

a8 W

16-.

1 5

390.83 390.83 93.05%.

9 0WRV 6

420.00 420.00 100U00%

Ti. Pi-

"60-Total Beams...9 e

Total Percent:

695.78%

i............... i...........Total w eld Metal Coonraee -

'77 31%

L uase Metat: vOlUme 1=50.0 i

Cubltic inces i

I Coverage Beam Percent of Bem Ana Sketch iCub. In.

toal 1050.0.

7 7

86.39%

1 +92 45°/604 7

807.09 907.09 8.39%

3 45" 8

525 525 50.00%

4 460-8 525 525 50.00%

5 60 -

8 525 525 50.00%

6 1

60*-

1 8

525 525 1 50.00%

S 7 WWRV I

Ig 8l30.000/

1 7

1 n* WRV 1 8

qr I ro (10%

`

Total Percent 422 78%ý 7771?i Total Base Metal Coverage.

60,40%

F

-i Combined Coverage a, S

Coverage jPercent

.WeldM*et.!I. 77.211%

Base Metal 60.40%

iii~iiiiiiiii: i V61o 4 :

-V rlue...

....... Resu'6lt...

42001.470.00.

22.0 1050

00 I14760006 43.14%ý Total Exam Coverage =l 68.23%

Page 16 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D - Code Item B3.110 CCNPP Component ID: 4 -404 NDE Report No.: 2000BU028 LTPNo.: 004100 SummaryNo.: 004100 Coverage Sketch No:

5 MO No.: 1199904203 Exam Area: Weld Metal 360' Scale: 50%

Exam Angle:

450 / 60*

(Sketch Resized for Relief Request)

Page 6 of 9 Diameter: On Head Thickness:

4.40" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Shell E945=

/ 600- Coverage = 390.83 in3 of 420 in3 exam area = 93.05%

Coverage Dimensions Beam Directions Widthh x7

' Thi]2ls Ls tCýb I.)

Thfward No2z zleit Exam Area 51.85 6..0 1

04 Aafo i~oze, widMtl 5.518c 420.00 Clockwise:'-

ease Metal s18 as5 4:5 1050M0 Counter Clockwise:

Weld Metal: Volume 420.00 'Cubic Inches I

Coverage Beam Percent of Beam No.

Angle Sketch Cub. Is.*

Tot.l"420.00.

1 45"T 1

419.16 419.16 99.0°%

2 45"1 2

66.37 66.37 15.80%

3 60°T 3

418.44 418.44 99.63%

4 m60° 4

35.00 35.00 8.33%

5 45*-

5 390.83 390.83 93.05%

6 45o-5 390.83 390.83 93.05%

7 60'-

5 390.83 390.83 9

93.05%

8 60*-

5 390.83 390.93 3.05%

9 1 0'WRV 6

1 420.00 1 420.00 100.00%

T "Iotal

-Beams:

9 iTo-,to w

Perent 695.18%

I Total Weld Metal Coverage: i 77.31%

coerage Beam Percent of Beam No.

Angle Sketch (Cub. ton.).Toa*

0.00___

1 +2 45160*J 7

907.09 907,09 86.39%

3 460-8 525 525 50.00%

4 45"-

8 525 525 50.00%

5 60'-

8 525 525 50.00%

6 60*-

8 525 525 50.00%

7 O° WRV 8

525 525 50.00%

Total BeamsI 7 j

Total Putrcert 422.78%

I.................

T ta as M t l o v r g e 6 00 0%...........

Combined Coverage overage....

To.al

Weld Metal, 1,,77.?1%

4200 r 1470.002?,%

base Metal 6

.0............1 0

1470.0 Total Exam Coverage iT 5.23%

Page 17 of 78

Enclosure I - Relief Request ISI-24 for CCNPP Unit 1 Class Code Category B-D -

Code Item B3.110 1 Components CCNPP Component ID:

4-405 NDEReportNo.:

2000BU028 LTP No.:

004100 SummaryNo.:

004100 Coverage Sketch No:

6 MO No.:

1199904203 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

00WRV (Sketch Resized for Relief Request)

Page 7 of 9 Diameter:

On Head Thickness:

4.40".

Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Shell Nozzle 0' WRV Coverage = 420 in' of 420 in' exam area = 100%

CooaeDmnsions Beam Directions

..e aLnt

-x Wiafi6 X

aC~

4.oT r

ozt:

Eaim Areu '5'185' 4.5 -j 1470.00 -- Aw-ay from Nozzle Weld Metal 51.85 5

420.00

.IC'cw.

......... b a se M etal:

51.a 5.

4...5 1 0 5 0.0 0 o n'6.i c k ise :

1.........

Weld Metal: Volume =1 420.O0:Cublc Inches Beam No.

§.ye.

Beam Percent of

..Beam No.

An le I Sketch Cub. In.

Total 4e 0.00 I

45°t 1

419.16 419.16 92.80%

2 45°1 2

66.37 66.37 15.80%

3 60°!"

3 418.44 418.44 99.63%

4 60-.

4 35.00 35.00 8.33%

5 45*-

5 390.83 390.83 93.05%

6 45°-

5 390.83 390.83 93.05%

7 60'-

5 390.83 390.83 93.05%

B 8 60'-

5 390.83 390.83 93.05%

a9 O WRV 6

420.00 420.00 4

00,00%

Tot Beamsotal Percent:' 695578%

To el tI...................

.. ~~~Total Weld Metal Cover :

7.1 Base Metal: Volume =

1050.00iCublc Inches i

C~rge......

Beam. Percen-t o.f, Beam No.

Anle Sketch (Cub. In.)

Total 1050.00 1 +2 45/60T 7

907.09 907.09 86.39%

3 45*-

8 525 525 50.00%

4 45*-

8 525 525 50.00%

5 60°-

8 525 525 50,00%

6 60'-

8 525 525 50.00%

7 0° WRV 8

525 525 50.00%

Total Bane Metal Coverage:

60.40%

t*nmhlnod Canovrase Combined Covers e S

Coverage

.Perent

.*.*. ai...

....Meal:

77 31

-BasseM~eal: 60.0 X

Volume

+

42000 1 050.00.

total "Vh6*m *"

.. Result.

147000 22 09%ý t4170.00414 Total E a o**** roT

5. 23%

tota 6 ' m 1 C*

o I v..151 a....

I.

a.a.

I

a 6 5 Page 18 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.110 CCNPP Component ID: 4-405 NDE Report No.:

2000BU028 LTP No.:

004100 SummaryNo.;

004100 Coverage Sketch No:

7 MO No.: 1199904203 Exam Area:

Base Metal 3600 Scale: 50%

Exam Angle:

450

/ 600 (Sketch Resized for Relief Request)

Page 8 of 9 Diameter: On Head Thickness:

4.40" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel E

Coverage by at least 2 sound beams = 875.01 in 0 of 1050 in 0 exam area= 83.33%.

]

Coverage by 1 sound beam only =64.16 in' of 1050 in' exam area = 6.11%.

Total: 875.01 + (64.16 /2) =

09 in of 1050 in3 exam area = 86.39%.

Coverage Dimensions Beam Directions p pyaragea~tm ens,'

............ i" ' : - ".......... " t z ~ o " ",

r

t 6 a............

R o--xm-Area:

.55 3

4.......

~46 A-Twayrom Nozzle:

jed Metal:'

51.8.t1.8 45 420.0 Clockwise B

ase 6

".91.89B45....

51:85

'.........6..

0 Weld Metal: Volume =

420.00 Cubic Inches Coverage Beam Percent of Beam No.

Angle Sketch (Cub. In.)

Total.

420.00..

1 45"T 1

419.16 419.16 99.80%

2 45°9 2

66.37 66.37 15.80%

3 60-t 3

418.44 418.44 99.63%

4 60°*

4 35.00 35.60 6.33%

45'-

5 390.83 390.83 93.65%

6 45*-

5 390.83 390.83 83.05%

Base Metal: Volume =

1050.00WCublc Inches I

Beam Percenl of Beam No.

Angle Sketch (Cub. In.)

Total 1050.06 66.36%

1 2 45'/60T, 7

907.09 907.09 86.39%

3 45°-

8 525 525 50.00%

4 45*-

8 525 525 50.00%

5 60"-

8 525 029 50.00%

6 60'-

8 525 525 50.00%

i 60*-

5 390.83 390.83 93.05%

60*

5 390.83 390.83 93.05%

7 0- WRV I 8

625 5265 50.00%

'25 52-1 Sn 00%

9 0" WRV 6

420.00 1 420.00 1 100.00%

....... otl ea s:9

.......... Total Percen5) 695.78%

i a....o.e.ag e :

.i............

2'[

'[ [;;

T tal......

a s Total Percent:

422.78%

Totaf a I

Metal Coverage:6.K40%

Lomonenn a m

veraae i

a (Volume 77eldý Ie;: 4j2ý06 0 0 1470060 2209%

Base Metal: 60.40%1500 1406434 Total Eoom Coverage ='F-685-23 %

I Page 19 of 78

Enclosure I - Relief Request ISI-24 for CCNPP Unit I Class I Components Code Category B-D - Code Item B3.1 10 CCNPP Component ID: 4-405 NDE Report No.: 2000BU028 LTP No.:

004100 SummaryNo.: 004100 Coverage Sketch No:

8 MO No.: 1199904203 Exam Area:

Base Metal 360' Scale: 50%

Exam Angle: 450

/600

/ 0° WRV (Sketch Resized for Relief Request)

Page 9 of 9 Diameter: On Head Thickness:

4.40" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Shell E

45*-

/ 60*-

/ 0* WRV Coverage = 525 in' of 1050 in' exam area = 50%

CoverageOlmensipps Beam Directions G i

.. I

. 11 1-1

1. ý,

I 1

1 h

WidtK'"

Thick-t-(Cw',l,6j....

.ToZrd'14.,2,1ý,

51 85 5

'1'470ý00 I......

Weld 51.85 1

1:8 420.00 Clockwise:

Base Metal:

51.85 1

4ý5 4.5 1060M 6oýniýi Clockwise:

Weld Metal: Volume =:

420.o0eCublc Inches I

I Coverage Beam erntf Beam No.

Anole Sketch

-Cub.

In.

Total 420.00 1

45T 1

1 419,16 419.16 99.80%

2 45'1 2

66.37 66.37 15.80%

3 418R44 die 44 hean" 1+

4 60" 4

35.00 35.00 8.33%

5 45' 5

390.83 380.83 93.05%

6 45*'

5 390.83 390.83

_3,05%

7 60h 5

390.83 390.83 93.05%

8 60*o 5

398.83 390.83 93.05%

S 0° WRV 6

420.00 420.00 100.00%

r~mreams~eTotal Percent 5

6.78%

a....

T.

iwf Mti imrg f~o Base Metal: Volume =

1050.00tCublc Inches Coverage Beam Percent of n No.

Angle Sketch (Cub. In.)

Total 1050.00 86.39%

2 45°160'1$

7 907.09 807.0 86.39%

3 45'-

8 525 525 50.80%

4 45 8

525 25 50.00%

5 60*-

8 525 525 50.00%

6 60*-

8 525 525 50.00%

7 0O WRV 8

525 825 50.00%

Tota e

Totaas7 Total Percet:.

422.78%

Total Bane Metal Coverage: 6.940%,

?~

.I.

Combined Coverage Porn-t Volume,

+

Vlm

~

l Co...ag Tota,

l M t7.......7-W ldiMea 7 7.31 %

426. 66 42000

1.

147000 1::.....

.Ba 1 0,0,0

- 0 17 00

.Ttal Exam Coverage 8.23 Page 20 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.110 Responses to Request for Additional Information Summary No.: 004150 Comp ID: 16-405A Page 1 of 9 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Safety & Relief "A" Nozzle to PZR Upper Head / Due to nozzle configuration coverage of nozzle side base metal and weld was limited. The nozzle enters the vessel at an angle thereby also limiting coverage attainable from the vessel side of the weld. The pressurizer nozzle-to-vessel head welds are accessible only from the head side based on the nozzle curvature. The scanning surface of the nozzle is essentially perpendicular to the head surface which prohibits the ultrasonic wave entering the Code required examination volume at an angle that will interrogate the weld volume for in-service flaws. The nondestructive examination (NDE) techniques and procedures used incorporated examination techniques qualified under Article 4 of Section V of the ASME Code as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculationsr Page 21 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.1 10 CCNPP Component ID:

16-405A NDE Report No.:

CC06-1U-065 LTP No.:

004150 Summary No.: 004150 Coverage Sketch No:

1 MO No.: 1200500749 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

450 (Sketch Resized for Relief Request)

-Page 2 of 9 Diameter: 96" Thickness:

5.00" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel

'CASS = Cast Stainless Steel E

45°T Coverage = 4.25 in2 of 4.59 in2 area = 92.59%

Coverage Dimensions lBeam Directions

~

SeSitickns

=

Rs26:8 oar Nozzle:

Exam Area:

23

'5.6 e

kth 68

............. I--

1 1 "

1, 1Ted t£ '*

°

W ~tf

", T i~ ~* s*

' ' ( q

).....

T 'wr* d o-Weld Metal; 23 I

See Sketchz 4:9 l coc a

ease..eta.

2.23~See..........

22.2 nte.

Weld Metal: Volume =

4.59 Square Inches

.ýo~ae Beam Preto Beam No.

Anle Sketch Squ. In.

Total 4.59 1

45"T 1

4.25 4.25 92.59%

2 45°'

2 0.00 0.00 0.00%

3 60t' 3

4.34 4.34 94.55%

4 60°'

4 0.00 0.00 0.00%

5 45°-

5 1.38 1.38 30.07%

45*-

5 1.38 1.38 30.07%

-7 60".

5 1.38 1.38 30.07%

8 60°-

5 1.38 1t.38 30.07%

9 0 WRV 5

1.38 1.38 30.07%

o.

e 0.....

J..................).................................

Totl Bams 19 "T

ota Pecen: *337.47%"

T.....

t a..........

a I d M a ta IC c erag : 3

' 7 50 %

base Metal: vaame a.~e aqoare nones Base Metal: Volume = ý 2.Z a ý quare Incheos vage.

Beamrn Percent of Beam No.

Angle Sketch (Squ. In.)

Total 22.26 1

83,02%

1+2 45"/60°T.4 6

18.48 18.48 83.02%

3 45*-

7 10.53 10.53 47.30%

4 45*-

7 10.53 10.53 47.30%

5 60'-

7 10.53 10.53 47.30%

6 60'-

7 10.53 10.53 47.30%

7 0'°WRV I 7

1053 105 *3 I47.300/.

G-WR

1.

7

,3

-. 3.

n-Total Beams 7Total Percent: 4012.ý56ý%

T otal B ase Metal Coverage.

57.51%1/

Combined Coverage over'gVl Total i Percent a:olme'Vulunie-Result WedMtl375%......4928.85 6.41%

-~

~

m aseMtal 57.51%

22282.85

~......

C.....

Total......

S......

STota Exam Coverage 854.09%

Page 22 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class Code Category B-D -

Code Item B3.1 10 1 Components CCNPP Component ID:

16-405A NDE Report No.:

CC06-1U-065 LTPNo.:

004150 Summary No.: 004150 Coverage Sketch No:

2 MO No.:

1200500749 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

450 (Sketch Resized for Relief Request)

Page 3 of 9 Diameter:

96" Thickness:

5.00" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel N45°,1 Coverage = 0 in2 of 4.59 in2 area = 0%

Coverge Dmensons Beam Directions

...............spsy-g

a.

, c i i

a.

Weld Metal: Volumes:

4.59 iSquare Inches I

I Coverage Beam Percent of Beam No.

Angle Sketch (Squ. In.)

Total 4.09 I

45t 1t 4.25 4.25 92.59%

2 45'-

2 0.00 0.O0 0.06%

3 60°1 3

4.34 4.34 94.55%

4 60",

4 0.00 0.00 0.00%

5 45'-

5 t.38 t.38 S3O07%

6 45'-

5 1.38 1.38 30.07%

7 60*-

5 1.38 1.38 30.07%

8 60'-'

5 1.38 1

,3 130.07%

0' WRV 5

1.38 1.38 I30.07 T

Wd loe.....

Total Weld Metal Coverage: 137,50%

Base Metal: Volume =i 22.26 Square Inches

.rage Bem Percent of Beam No.

Angle Sketch 22S.u.2n.).Tota.

332.

t -2 45'/60'Ti 6

18.48 18.48 8.3 83.02%

3 45'-

7 10.53 10.53 47.30%

4 45*-

7 10.53 10.53 47.30%

5 60'-

7 10.53 10.53 47.30%

6 60'-.

7 10.53 10.53 47.30%

... 7 0' W RV 7

10.53

-10.3 47.30%

T.... 2 !....................

.................... i..................... *...................

Total Beams:t7 Total Percent:

402,56%

Total Base Metal Coverage:i 57.51 Combined Coverage e

e oPercent i Base Metal:; 57.51% i

...4.......

.. o..........

X totai

.i~ni 17 =-m' Result

' 6 U~i '*[ -' "* '

61]

............ R e 6 i}..............

S5...

6.

? 85

41%

T 22

g..................

i i....................

t f * /

22.26 26.85.

I47.68%

Total Exam Coveragte 5.9 "ill Page 23 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class Code Category B-D - Code Item B13.110 1 Components CCNPP Component ID:

16-405A NDE ReportNo.:

CC06-1U-065 LTP No.:

004150 SummaryNo.: 004150 Coverage Sketch No: 3 MO No.: 1200500749 Exam Area: Weld Metal 3600 Scale: 50%

Exam Angle:

600 (Sketch Resized for Relief Request)

Page 4 of 9 Diameter: 96" Thickness:

5.00" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Note: At 180' the 60'T exam was limited by the head to shell transition.

A supplemental 35°T was used to obtain additional coverage I

60=T Coverage @ 180°, Wmax limited by head to shell transition. = 3.23 in2 L=I 35°T Coverage @ 180 = 1.11 in2 Total Coverage 3.23 + 1.11 = 4.34 in2. 4.34 in2 of 4.59 in2 area = 94.55%

coverage Dimensions Beam Directions i*'

.sb k......

2 me L '

2 3 X.Thi......

.(s Inr T

EnmAe 35.6 5.Sletchi 16'85 I Away irom,,Nozzle t

W l Mea 23IS eS eth............

5 I4,hws Rosak~om 2346e SeSec 22162C61.itr Clnrkiv -4 2ý See Sketch Weld Metal: Volume 4,59

.S uare Inches Seam No.

Coverage eeam..Perce..nt o

...eam No. IAngle Sketch Squ. In.)

Total 4.59 1

45' 1

4.25 4.25 92.59%

2 45*1 2

0.00 0.00 0.00%

I

4 4 ?i4 4 i'*4 4

60%

4 0 00 0.00 0.00%

5 450-5 1.38 1.38 30,07%

6 45'-

5 1.38 1.38 30.07%

7 60*-

5 1.3 6

1,38 30.07%

8 60*-

5 1.38 1.38 30.07%

9 0° WRV 5

1.38 1.38 30.07%

.... I, l i i i i i

.Ijjjj..

.. ~

Total Beamss:9 i

Total Percent:

337.47%

5......................

SI I

Base Metal: Volume = l 22.26lSquare Inches Coverag.

Beam I.Percent o!

Beam No.

AngIe Sketch (Squ. In.,

Total 22.26 1 +2 45"160°tj 6

18.4 18.48 83.02%

83.02%

3 45-"

7 10.53 10.53 47.30%

4 450-7 10.53 10.53 47.30%

5 60*-

7 10.53 10.53 47.30%

6 60°-,

7 10.53 10.53 47.30%

7 0' WRV 7

10.53 10.53 47.30%

.7..............

...i. ii iiiiii.

i i~~iiiiiiiii iii li~iii

.ii

.i~i

.ii

.iiiiii.i iiiil iiiiiiiiiiiiii l

Total Beams: I 7 I

Total Percent: 1 402.56%

.T e M es 6

.5 I

Ba.........%

8 seM etal Come a~ :i 5. 51 Combined Coverage Coverge Weld Metal 37 50°%..

S.....ane Metl:

57.1.

VooI Volm i

4 59 j26,85 6 64 1 22.26 26.85 47 68%

l EamCovea a;

54.%

Page 24 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class I Components Code Category B-D -

Code Item B3.110 CCNPP Component ID:

16-405A NDE Report No.:

CC06-1U-065 LTP No.:

004150 SummaryNo.:

004150 Coverage Sketch No:

4 MO No.:

1200500749 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

600 (Sketch Resized for Relief Request)

Page 5 of 9 Diameter:

96" Thickness:

5.00" Material:

CC/S CCOS = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel E

60°i Coverage = 0 in2 of 4.59 in2 area = 0%

Coverage Dimensions Beam Directions,

~

Width Reul Exm~re:,

2 x

56 w.t,,.

5SlT.ch.......=.....n.685 T~iowarNozzte:Lt

.................. e i M ; i "2 3 t

I...........

.i.........................

.. S 6 6 S ke tc h 1............ ]........ ]...................

.ii~

[....................

W e Meta.

23 SeeSket

~......2 6 "s Clockwise.

base Metal:l.23 14.6........S6I 2:6 ltci Coo 6ýCI~ se:,-

Weld Metal: Volume =

4.59 Square Inches Coverage Beam Percent o Beam No.

Angte Sketch iS

. in.)

Total

4. 5 9 1

45'T 1

4.25 4.25 62.59%

2 45',

2 0.00 0.00 0.00%

3 60"T 3

4.34 4.34 94.55%

4 60-I 4

1 0.00 0.00 0.007%

5 45'-

5 1.36 1.38 30.07%

6 45*-

5 1.38 1.38 30.07%

7 600-5 1.38 1.38 30.07%

8 60'-

5 1.3 1.T36 30.07%

9 0' WRavI 5

1.36 1.38 130.07%

I i

Base Metal: Volume =

22.26 Square Inches

.aeam Peýrcent oi Beam No.

Antle Sketch S a. In.)

Total 2

22.26 1 + 2 451/60°Ti 6

18.48 18.48 3.0%

[A3.02%

3 45'-

7 10.53 10.53 47.30%

4 45*-

7 10.53 10.53 4730%

5 60'-

7 10.53 10.53 47.30%

6 60*-

7 10.53 10.53 47.30%

7 0' WRV 7

10.53 10.53 47.30%/

I 7...

Total Base Metal Coveriae:+5.751%1 Total........

Be

... ;7; r -...........

o...tal Wel Mel er.:

37.....

50 Combined Coverage Coverage Total

ýercent a

Voun

I Rsl Weld Metal: 137.,50%

466 26 5

I 65.

Base Metal.

F7.51%

226 1

26.654.8

............... W, ~ a ~ 3 : 6 ii..........................

i ;:

B *

4 ° r

.....i.........*.

7 Total EaCoveragei 514.06%

Page 25 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D - Code Item B3.110 CCNPP Component ID:

16-405A NDE Report No.: CC06-1U-065 LTPNo.: 004150 SummaryNo.: 004150 Coverage Sketch No: 5 MO No.: 1200500749 Exam Area:

Weld Metal 3600 Scale: 50%

Exam Angle:

450

/600

/00 (Sketch Resized for Relief Request)

Page 6 of 9 Diameter: 96" Thickness:

5.00" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Iin 45°*-

600-0/ Coverage = 3.83 in' of 4.59 in' exam area = 83.33%

NOTE: This sketch shows coverage @ 180' which was the most favorable location for these exams. Moving from 180° to 00 the coverage was gradually reduced to the point where 0%

coverage was obtained at 0°.

Actual coveraoe for these exams = 1.38 in' = 30.07%

Cove~rees..

Beam Directions

)F

Tikns S465flE[

Toward Nozzle t Exam Ara 3

i See sketch 26"85 AayrTNZ~o Weld Metal 23 1........see sketch,45 ease Metal :

23 1

4.6......See Sketch.......22.26 CaolecIkw~s,,

Weld Metal: Volume =

4.59iS uare Inches I

Coverage.Beam Perceen.of Beam No.

Anle Sketch Squ. In.)

Total 4.59 1

45'T i

4.25 4.25 92.59%

2 45-1 2

0.00 0.00 0.00%

3 60"T 3

4.34 4.34 94.55%

4 60'1 4

0.00 0.00 0.00%

5 45°-

5 1.38 1.38 30.07%

6 45'-

5 1.38 1.38 30.07%

7 60*-

5 1.36 1.38 30.07%

6 60"-

h 1.38 30.07%

0' WRV 5

1.36 1.38 30.07%

...... I...................................:.. !......................

Total Beams 9 To Ttal ea 37.47%

Total Weld Mea5c r

0:

375%

.Coverage..B.e.a!

Perce.nt of Beam No.

Anle Sketch S aq. In.)

Total 22.26 t 1 2 45'/60°H.

6 16.48 18.48 83.02%

83.02%

3 45'-

7 10.53 10.53 47.30%

4 45*-

7 10.53 10.53 47.30%

5 60*-

7 10,53 10.53 47.30%

6 60"-

7 10.53 10.53 47.30%

7 0' WRV 7

10.53 10.53 47.30%........

Total Pe 5

Total PerIcentI w

4062.561 Total Base Metal Covertte:

57,51%

Combined Covera-e I

.1

_*1 o...rage

-I Wd Mal cPercent B..........

s

,e Me al.3*.*51 1

Base::::::::

mewl X

ITotal Voum a Volume Resolit a l

...i..........

V h i ie " " - " " "

R d t.................

_222.6 I

2685 e a n m C v r e

. S. 9 Page 26 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class I Components Code Category B-D - Code Item B13.110 CCNPP Component ID:

16-405A NDEReportNo.:

CC06-1U-065 LTP No.:

004150 SummaryNo.: 004150 Coverage Sketch No:

6 MO No.: 1200500749 Exam Area:

Base Metal 3600 Scale: 50%

Exam Angle:

450

/ 60' (Sketch Resized for Relief Request)

Page 7 of 9 Diameter: 96" Thickness:

5.00" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Coverage by at least 2 sound beams = 17.94 in'.

Coverage by 1 sound beam only = 1.07 in 0.

Total: 17.94 + (1.0712)= 18.48 in'.

18.48 of 22.26 =8302%

...........~

~~~

r g..* *

s

s....................................................... 'B eam D k aq kq ý,,

Coverage.i* OlmeolarteResult I

eam O.rctlone Exam Area:

23 see

'Sdketch 28.85 AwyroNzle W e l lv le t a ' " " 3 "' ' "................

i........

k et..

............. S '............

Wele Metal:.23 SeeSketch 2C4.59 clockwise:p' ease Metel: 123 See Skietch 22:26 +-+chunfer Cloclvise:'

Weld Metal: Volume =

4.59 gSquare Inches ovesage

..Beam Peret of eeam No.

AcSle Sketch (Su. In.I Total 4.59 1

45 1

4.25 4.25 92.59%

ecarnrge B.MPercent of Beam No.1 Angle Sketch sýqu In.1.

Total 122.26 102 45"160°11 6

18.48 18.48 2

45o I 2

0.00 0.O0 0.00%

2*

4.34 I(

1l)."K'i 111 tl:'i 4/ Z'*llv/*

W 4

608 4

0.00 0.00 0.00%

5 45*-

5 1.38 1.38 30.07%

6 45*-

5 1.38 1.38 30.07%

7 60"-

5 I1.38 1

1.38 30.07%

8 60*-

5 1.38 1.38 30.07%

9 0* WRY 5

1.38 1.38 30.07%

rt

.lInt.337 47.

Totial Beamns:,9................... Total Percen'hi' 337.47%,/

g.

.7 1

4 45"*

7 10.53 10.53 47.30%

s 80 °*

7 10.53 1053 47.30%

6 60'-

7 10.53 10.53 47.30%

7 0* WRV 7

10.53 10.53 47.30%

2 1 2 2 2 2 2 12 2 :*.

z.x......

Total Beams 7

Total Perent:

402.,8%

Total Base Meta. Covera..

.0.%

Cembined Coveraae Base Metal Metal UoIerage L

l ocal Perce ntý x

"VolurAeý11 V

6 lo~e" R~s _6 2

57.51%

22.26 26.85 47.s8%

17.

.Total Exam Coverage =

54.09%

Page 27 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class CodeCategory B-D -

Code Item B3.110 1 Components nfl 1

1Page 8 of 9

%A-11o1 r r Diameter:

96" Component ID:

16-405A NDE:Report No,: CC06-1U-065 Thickness:

5.00" LTP No.: 004150 Summary No.: 004150 Material:

CC/S Coverage Sketch No:

7 MO No.: 1200500749 CC/S = Clad Carbon Steel Exam Area:

Base Metal 3600 Scale: 50%

S/S = Stainless Steel Exam Angle:

45" / 60" 0" WRV CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Nozzle Vessel UIJ45'.-' 60'.- / 0* WRy Coverage =10.53 in' of 22.26 in* exam area =47.30%

NOTE: This sketch shows coverage @ 1800 which was the most favorable location for these exams. Moving from 180' toO0' the coverage of the nozzle side base metal was gradually reduced to the point where 0% coverage was obtained at 0'.

No coverage credit was taken for the nozzle side base material.

covera.e

.imesion Beam Directions Widt Exam.Areai!

23 5.'~~'th26.85 Away froml Nnizule a..d Meta.23.

45 Cloc e

4o°e /e0°l/.23 WRV..o4.6ee S

=t 10.

22.26 Counter Clocxa ise:

Weld Metal: Volume =i 4.59 Square Inches I

C ve r

......e am Percent of Beam No.

Angle Sketch Squ. In.)

Total 4.59 1

45° 1

4.25 4.25 92.59%

2 45' 2

0.00 0.00 0.00%

3 60' 3

4.34 4.34 94.55%

4 6e 4

0.00 0.00 0.00%

5 45'-

5 8

.38 1.38 30.07%

6 45'-

5 1.38 1.38 30.07%

7 610' 5

1.38 1.38 30.07%

8 60° 5

1.38 1.38 30.07%

.9 WRV 5

1.38 1.38 30.07%

Total Beams: 89 Total Percent:!.337,47%

!i Total Weld Metal Coverrage:

37.50%

C...

meal volume t

eeam No.

An Ste Sketch Squ. In.

Total 22.28 1+2 45'/60i 1O' 6

18.48 18.48 583,02%

3 d5°.-

1 7

1 n 53 1053 47 30%

4 45°-

7 10.53 10.2 3 47.30%

5 60.-

7 10.53 10.53 47.30%

6 860-.

7 10.53 10.53 47.30%

7 01 WRV 7

10.53 10.53 47.30%

Total

.eems:

7 To..tal Perceot 402,56%

Total Baseiv-din un e~d.

57.51' Combined Coverage Coverage Total

............................. ;*"P e ; n " * " "

'"V 1 i $ T

+

"V 1]*

Y l"m 6 si I.......

Weld Metal 37 50%

1 459 268 41%.

?6-i T r =.,. o o * + i

.aseMetal 57 51%

2228..2885..

.4788%

otlnmCveae 889 Page 28 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D - Code Item B3.110 CCNPP Component ID:

16-405A NDEReportNo.:

CC06-I1J-065 LTP No.:

004150 Summary No.:

004150 Coverage Sketch No:

Exam Area MO No.:

1200500749 Exam Area:

AFGLBCKDHIE Scale:

50%

Exam Angle:

NA (Sketch Resized for Relief Request)

Page 9 of 9 Diameter: 96" Thickness:

5.00" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Weld Metal Area:

FGHJ = (0.85 x 5.4) = 4.59 in' Base Metal Area:

Vessel Side = AFJE = (1.95 x 5.4) = 10.53 in' Nozzle Side = GKDH + GLM + LKM + LBCK

= (1.95 x 5.4) + (1 x 0.6)/2 + (1 x 0.6)/2 + (1 x 0.6) = 11.73 in2 Total Base Metal Area = 10.53 + 11.73 = 22.26 in2 Total Exam Area: 4.59 + 22.26 = 26.85 In' Coverage Dimensions Beam Directions L-Cength x

-V -dh iS-i~)

-xamArea: 23 6

S letc -

2685.

A i, ozle:

23 WeldfiMea:

'23 1

See S hk.tch.

4.59 Clockwise:.

Base Metal 1

23 41i SeIkth Weld Metal: Volume 1

4.59 Square Inches I

Coverag.Beam.

Percent ot Beam No.

Anale Sketch IS u. In.)

Total 4.59 1

45°T 1

4.25 4.25 92.59%

2 45°1 2

0.50 0.00 0.00%

3 60*T 3

4.34 4.34 94.55%

4 601 4

0.00 0.00 0.00%

5 45°-

5 1.38 1.38 30.07%

6 45*-

5 1.38 1.38 30.07%

7 60"-

5 1.36 1.38 30.07%

8 60°=

5 1.39 1.38 30.07%

9 0° WRV 5

131.38 138 30.07%

T.TotalbPerc:nt:To 33a.47%

ý i..................

L.............

i ~ i a M i i S i l I I "* ;,,

Base Metal: Volume 0 1 22.261 Square Inches I

Coverage.Beam Percent of Beam No.

Ane I Sketch l5 a. Is.

Total.

22

. + 2 45 °/60 "TJ, 6

18.48 18.48 83

.02%

3 45*-

7 10.53 10.53 47.30%

4 45*-

7 10.53 10.53 47.30%

5 60.-

7 10.53 10.53 47,30%

6 60*-

7 10.53 10.53 47.30%

7 00 WRV 7

10.53 10.53 47.30%

:.: 7. :... : :.

Total Beams 7 i

.Total Percent: 40256%

Total B 1ase Moetl Coverage: 5751%soy S...........

Combined C. Dvera a Coveragei Percent Weld Metal:. 31 :i0 M................

5 7*

M7a.Q i~.t.1 57

5i*l;................

ame ot[

4159 f2685 6

6.41%6 Extal Eiam Coveranie

,54.044 Page 29 of 78

Enclosure 1 - Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.110 Responses to Request for Additional Information Summary No.: 004200 Comp ID: 16-405B Page 1 of 9 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Safety & Relief "B" Nozzle to PZR Upper Head / Due to nozzle configuration coverage of nozzle side base metal and weld was limited. The nozzle enters the vessel at an angle thereby also limiting coverage attainable from the vessel side of the weld. The pressurizer nozzle-to-vessel head welds are accessible only from the head side based on the nozzle curvature. The scanning surface of the nozzle is essentially perpendicular to the head surface which prohibits the ultrasonic wave entering the Code required examination volume at an angle that will interrogate the weld volume for in-service flaws. The nondestructive examination (NDE) techniques and procedures used incorporated examination techniques qualified under Article 4 of Section V of the ASME Code as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component

.:thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 30 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.110 CCNPP Component ID:

16-405B NDE Report No.:

CC06-lU-066 LTP No.:

004200 Summary No.:

004200 Coverage Sketch No:

1 MO No.:

1200500749 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

450 (Sketch Resized for Relief Request)

Page 2 of,9 Diameter:

96" Thickness:

5.00" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel 45'T Coverage = 4.25 in' of 4.59 in' area = 92.59%

..Coveralge Dimensions Beam Directions S.Rest;[F Len

,g,tf oX Width~ i 4m ness ~

2S 4~i)

%~dzl

... am........23 564....5~kt,.....

.2.50 Aa rmNzl Weld! Metal:}

23 1

1 8ee Skejci, i.......29 clockwise ease Metal, 1 3

4 4:6 See Sketcht n 22.28 counter Clockwise '-

wu elmetal: volume =

.5 agoare 5ncne

} Coerage eBeam Percent of Beam No.

Anle sketch aSqu In.

"I Total 4.59 1

45 1

4.25 4.25 92.56%

4 U.UU UUU I U.tUU0o 3

60"t 3

4.34 4.34 1 94.55%

4 60W 4

0.00 0.00 0.00%

5 45" 5

1.38 1.38 30n70Y%

6 45°-

5 1.38 1.38 30.07%

7 60--

5 1.38 1.38 30.07%

8 60'-

5 1.38 1.38 30.07%

9 0* WRV 5

1.36 1.38 30.07%

2I.....

,T ;

i,

..................!......................................I.....................................

'i-3

!jný Toa Bem oa ecn:3747%

4 Total Wel IIId

-Me.

at.a.IL C..o 1v,a.r..a :g 37.50%

Base Metal: Volume i

22.26 Square Inches Coverage Beam Percent of Beam No.

An*gle Sketch Squ. In.)

ota."22.26.

2 45'/60-11 6

16.46 f16.46 83002%

83.02%

3 45*-

7 10.53 10.53 47.30%

4 45'-

7 10.53 10.53 47.30%

5 60*-

7 10.53 10.53 47.30%1/

6 60*-

7 I10.53 10.53 47.30%

7 0 WRV 7

10.53 10.53 47.30%

Total Beams i7 Total Percent:

402.56%

Total Bane Metal Coverage: f 57+51%

Combined Coverage iCoveragem I

Total Pelrcnt e

Volum u

. Vlue "Result Wetd Metal: 37+50%

4.59 266856.%

Base Meta 57 51%8 Total.Exam Coverage..

4 09%

Page 31 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.110' CCNPP Component ID:

16-405B NDEReportNo.:

CC06-1U-066 LTP No.:

004200 SummaryNo.:

004200 Coverage Sketch No:

2 MO No.:

1200500749 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

450 (Sketch Resized for Relief Request)

Page 3 of 9 Diameter: 96" Thickness:

5.00" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel E

45°1 Coverage = 0 in2 of 4.59 in2 area = 0%

Coverage D imensons B.om D.................

Directions Lengh

'Width hikes S'qu-I-n.)-

Towardi NOzzIe T I Exam Aria 2

5.9 See Sketi~h 26-.85 A--- fro Noze t I Weld Me*a*:

23.

See Sketch

4. 9 bockww ease Metal:

23....

a.

S.

e i.

2.

.nrI.

Weld Metal: Volume =l 4.59 Square Inches I

I Coverage.

Beam Percent of Beam No.

Antle Sketch (Sua. In, Total 4.59 1

45"T 1

4.25 4.25 82.59%

2 45°1 2

0.00 0,00 0.00%

3 60.t 3

4.34 4.34 94.55%

4 60°1 4

0.00 0.00 0.00%

45--

5 1.38 1.38 30.07%

6 45*-

5 1.38 1.38 30.07%

7 60*-

5 1.38 1.38 30,07%

8 60-5 1.38 1.38 30.07%

9 0' WRV 5

1.38 1.39 30.07%

Total Beams: 9 Total Percent: '337 47%

.tot......al W.td Me1......t

..al.. C...o. v ne 1' 1.

3*

1.*.0%

Ba.e Metal: Volume 1

22.26 Square Inches i

Coverage Beam Percent of Beam No.

Anwls Sketch

+Squ. In.)

Toial.

2.26 1 +2 45'/60°11 6

18.48 18.48 93.02%

83.02%

3 45'-

7 10,53 10.53 47.30%

4 45F-7 10.53 10.53 47.30%

5 90°'-

7 10.53 10.53 47.30%

6 60°-

7 10.53 10.53 47,30%

7 0* WRV 7

10.53 10.53 47.30%

Total Beams:7 Total Percent:

B......

Total Bane Metal Coveraqe:

i............................

Combined Coverage Coverage I

Total d

t Pe

.2985 Base Metal57.51%22.26

~,

4...

i -* *-

Total Exam Coverage -i 54.09i4 4 10325.6%

I.~I....

j.

Page 32 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class Code Category B-D -

Code Item B3.1 10 1 Components CCNPP Component ID:

16-405B NDEReportNo.:

CC06-1U-066 LTP No.:

004200 Summary No.:

004200 Coverage Sketch No:

3 MO No.:

1200500749 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

60' (Sketch Resized for Relief Request)

Page 4 of:9 Diameter:

96" Thickness:

5.00" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Note: At 180* the 60DT exam was limited by the head to shell transition.

A supplemental 35°T was used to obtain additional coverage N

60°T Coverage @ 180", Wmax limited by head to shell transition. = 3.23 in2 LJ 35°T Coverage @ 180* = 1.11 in' Total Coverage 3.23 + 1.11 = 4.34 in 0.

4.34 in 0 of 4.59 in 0 area = 94.55%

Coverage Dimensions Beam

.irections

.Co nA t 23`*ý4(W i

W t x

h 26..8

- Away tram Nozzle:

Weld Metal::

23 f

See Sk 6l 4:. 5 Clockwise Bose Metal:,

23 14.0 See SketcW 22:26.Counter Clockwise Geag e.,Seaem Pecen! at.

Beam No.

Anle I Sketch Squ. in.)

Total 4.08 4.25 2

45'1 2

0.00 0.00 0.00%

3 60'T 3

4.34 4.34 94.55%

4 60°1 4

0.00 0.00 0.00%

5 45'-

5 1.38 1.38 30.07%

6 45"-

5 1.38 1.38 30.07%

7 60'-

5 1.38 1.38 30.07%

8 60*-

5 1.38 1.38 30X07%

9 0* WRV 5

1.38 1.38 30.07%

i...............................

i.

.Total7 Beas..

i Total Percent, 3 3 7.4 7 %

Total Weld Metal Coverage:l 37.50%

Base Metal: Volume =

22.26 Square Inches S

,Co.ve.rage Beam,..

Pecent..f Beam No.

An8le Sketch (Squ. In.)

Total 22.26 83.02%

3 45".-

7 10.53 10.53 47.30%

4 45*-

7 10.53 10.53 47.30%

5 60'-

7 10.53 10.53 47.30%

6 8o0-7 10.53 10.53 47.30%

7 O' WRV 7

10.53 10.53 47.30%

STotal Sea m:L Total Percent:

402.56%

Total Base Metal Coverage:

57.51%

..i...........

Combined Coverage Coverage Weld Metal 37.

Baseo Metal: 57.01 Total:

L-V6ldiiiir I Volume R

45 i28.85 6.41 %

2228**

2..80.......

7 6........

Total Exam Coverace 54.08%

22i}

Page 33 of 78

Enclosure I - Relief Request ISI-24 for CCNPP Unit 1 Class I Code Category B-D - Code Item B3.110 Components CCNPP Component ID:

16-405B NDE Report No.:

CC06-1U-066 LTP No.:

004200 SummaryNo.:

004200 Coverage Sketch No:

4 MO No.: 1200500749 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

60' (Sketch Resized for Relief Request)

Page 5 of 9 Diameter:

96" Thickness:

5.00" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel

[

60" Coverage = 0 in' of 4.59 in' area = 0%

Coverage Dimensions Beam Directions Resalt Exam Area:ý 23-56Se kth 26.85 Away from 'Nozzle:l4 Weld Metal: 1.23 1See Sketch:

4:5.

Clckise:'1-e 2.........

1.M 46......

e S k h

2.

.......... sý~

IT

- 23 1

S6""

SSIittcW 22......

...... 2616........

Ci Iri ~ izzlo k

ise:!

... [L[

. i.......... i..

Weld Metal: Volume 4.59 i Square Inches

,C9yeage Beam Percent of Beam No.

Anxle Sketch (Squ. In.)

lot I.xi 4.59 I

45*T 1

4.25 4.25 92.59%

2 45"1 2

0.00 0.00 0.00%

3 60°T 3

4.34 4.34 94.55%

4 60"1 4

0.00 0.00 0.00%

5 45°-

5 1.38 1.38 30.07%

6 45*-

5 1.38 1.38 30.07%

7 60*-

5 1.38 1.38 30.07%

a 60*-

5 1.38 1.38 30.07%

9 0' WRV 5

1.38 1.38 30.07%

.....~ ~

~ ~ ~ ~ ~ ~ ~~ ~~.........

is[..........

i.

. ]{i Pec

"i

.'7%

Total.....T.t.i Percent:..Be3,***9 Tota 337.47%

Total Weld Metal Cevero 8: iP 376606 Base Metal: Voleume

. 22.26.Square Inches Cxverage Beoam.Prcent Beam No.

Angle Sketch (S u. In.)

Total 22.26 83.02%

1.+2 45*/60"l 6

18.48 18.48 83.02%

3 456-7 10.53 10.53 47.30%

4 46 7

10.53 10.53 47.30%

5 80 7

10.53 10.53 47.30%

6 60*-

7 10.53 10.53 47,30%

7 0* WRV 7

10.53 10.53 47.30%

Li Total Beams: 17 Total Percent 402 56%

5IS M........

i I~*[7((]

CombnedCovrag P oerget i

-WeldMetal 37.50%

Base Metal: 57 51 e Volure

'Tti

=

6i.

i 458 I

85 6ý41%6 22026865 47.68%

Totai Eoam Coverae =;

64.88%

Page 34 of 78

Enclosure I - Relief Request ISI-24 for CCNPP Unit 1 Class Code Category B-D -

Code Item B3.110 1 Components CCNPP Component ID:

16-405B NDE Report No.:

CC06-1U-066 LTP No.:

004200 Summary No.:

004200 Coverage Sketch No:

5 MO No.:

1200500749 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

45'

/ 600 / 0' (Sketch Resized for Relief Request)

Page 6 of 9 Diameter:

96" Thickness:

5.00" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel IM 45"__/ 60°I / 0' Coverage = 3.83 in' of 4.59 in' exam area = 83.33%

NOTE: This sketch shows coverage @ 180* which was the most favorable location for these exams. Moving from 180° to 0' the coverage was gradually reduced to the point where 0%

coverage was obtained at 0°.

Actual coveraee for these exams = 1.38 in2 = 30,07%

i............ ].........................*...........

..................1............. T...............

t......

W a el 2 3....................

.................... S e S k e tc h................. !.......

lo6c kwniseC I...............................................................

Weld Metal: Volume 4.59!Square Inches Cove.age.. eeam Percent of Beam No.

Angle Sketch (Squ. In-)

Total

1. 4.59 1

45"t 1

4.25 4.25 92.59%

2 45-1 2

0.00 0.00 0.00%

3 e0°-"

3 4.34 4.34 94.55%

4 6001 4

0.00 0.00 0.00%

5 45*-

5 1.38 1.38 30.07%

8 450-5 r.38 1.38 30.07%

7 e0'-

5 1.38 1.38 30,07%

, 8 0-5 1.38 1.38 30,07%

5

0. WRV 5

1.38 1.38 30.07%

.Total Beams. 9 Tot.a

.Pe.r.ce 337.47%

.Total Weld Metal Coverage: I 37 50%

Base Metal: Volume 22.26 nSquare Inches I

e A ICoveSage eam Percent of Beam No.

Angle Sketch ISau. In.

Total 22.26 1 +2 45"/60" u 6

18.48 18.48 83.02% 1 3

45*-

7 10.53 10.53 47.30%

4 45°0 7

10.53 10.53 47.30%

5 60°'

7 10.53 10.53 47.30%

6 60o0 7

10.53 10.53 47.30%

7 0 WRV 7

10.53 10.53 47.30%

r..................

..T......

Total Beam~se'"s _17 Total Percent:

402.58%

i Total Base Metal Coverage:,

57.51%

Combined Coverage Coverage. *,

I Total M..

a

. 3 SBa M t

~~.......~~~~Totld xmCnro I8.5 Page 35 of 78

- Relief Request ISI-24 for CCNPP Unit I Class Code Category B-D - Code Item B3.110 1 Components CCNPP Component ID:

16-405B NDE Report No.: CC06-1U-066 LTP No.:

004200 Summary No.:

004200 Coverage Sketch No:

6 MO No.: 1200500749 Exam Area:

Base Metal 360' Scale: 50%

Exam Angle: 450

/ 600 (Sketch Resized for Relief Request).

Page 7 of 9 Diameter: 96" Thickness:

5.00" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel.

CASS = Cast Stainless Steel Coverage by at least 2 sound beams = 17.94 in'.

Coverage by 1 sound beam only = 1.07 in'.

Total: 17.94 + (1.07 / 2) = 18.48 i.

18.48 of 22.26 = 83.02%

Coverageiremensoon Exm Area:.

23 5:

See Sk61h 26.85 46

.g "............... e S k i h..................... 2 2 6 u i; " ' i i e i B a s M e ta l:....

2 3......

4 :

S.........................

c~ w i Weld Metal: Volume i

4.59iSauare Inches Coverage Beam IPrcent of Beam No.

Angle Sketch (Squ. In.) I Total 1

4.59 Base Metal: Volume = 1 22.26 ISquare Inches Coverage.eBeam Percent of Beam No.

An le Sketch s qu. In.)

Total 1 22.26 1

45;j 1

1 4.25 1

92,5%

2 45° 2

0.00 0.00 0.00%

1 +2 j45°/601 I a

1 18.48 18.49 83.02%

3 1

601T 1

3 4.34 4.34 94.55%

.t..t....m.....

Total Beams: :9 Total 337.47%

Ttall Beamsý-,

TotalF Total. Percent::...2....

Bass Metal Coverace 57.51%

TtaliWr Weld eal 1one S7ON.

Dined Cove Coverage Weld...

Id. Me*tal1: `375 0%ii.

BaeMetal: 57.51%

......F 2 2 Total I

6.l.................

Page 36 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class Code Category B-D -

Code Item B3.1 10 1 Components CCNPP Component ID:

16-405B NDE Report No.: CC06-1U-066 LTP No.:

004200 Summary No.: 004200 Coverage Sketch No:

7 MO No.: 1200500749 Exam Area:

Base Metal 3600 Scale: 50%

Exam Angle:

450 / 600 / 00 WRV (Sketch Resized for Relief Request)

Page 8 of 9 Diameter: 96" Thickness:

5.00" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel.

CASS = Cast Stainless Steel 11 45*-

/ 60.'-

0' WRV Coverage = 10.53 in* of 22.26 in' exam area = 47.30%

NOTE: This sketch shows coverage @ 1800 which was the most favorable location for these exams, Moving from 180° to 0' the coverage of the nozzle side base metal was gradually reduced to the point where 0% coverage was obtained at 00.

No coverage credit was taken for the nozzle side base material.

Coverage Dimensions Beam Directions X

enth x-Width 5r" Thick....

=

. (Sq.u Ii)

Toward NozEie tT wAr:5623...'.'5..

l

'See Sketch..................

e5.

A ayftrom Nozzle 23 4.6" s

.'eeTSketc.e.......o..te.

M Cloc66.........se:-'

Weld~~~~~~~~

.eal 23....................Skt..4 Weld Metal: Volume e 4.591 Square Inches

.SCoverag eam.Pece.

of Beam No.

Anole I Sketch S. u In.

Total 4.58 1

45"T 1

4.25 4.25 92.59%

2 45".

2 0.oo 0.00 0.00%

3 60°T 3

4.34 4.34 94.55%

4 e60 I

4 0.00 0.00 O.OO%

5 45'-

5 1.38 1.38 30.07%

6 45*-

5 1.38 1.38 30.07%

7 60*-

5 1.38 1.38 30.07%

8 6°0-5 1.38 1.38 30.07%

9 0' WRV 5

1.38 1.38 30.07%

.Total.Weld a

Cove*r

.i3..'

STotal Weld Meaid Coverage 1

37.,50.%

Base Metal: Volume 22.26 lSqaare Inches i

Coverage Beam Percent lf Beam No.

Angle I Sketch (Sqa. In.)

Total 32.38 1 +2 45°160'1T, 6

18.48 18.48 83.0 %

3 45*-

7 10.53 10.53 i47.30 4

45----

7 10.53 10.53 47.30%

5 60o-7 10.53 10.53 47.30%

6 60"-

7 10.53 10.53 1 47.30%

7 01 WRV 7

10.53 10.53 147.30%

£.2T~

~~ ~ ~~~~~~...........................

T2£1......... 2

-Total B eam:-7 Total oPvercen:

4 502.%

Total ease Metal Conera e:

57.51%

Combined Coverage

^

i~yoverase

.Perceo t 0

WelId Meta I

3

.5

.2......

.85

.. 6. 4 1

Total Exam Cvrg

'"5.9

........ l i......

J.T~*;2.f/II..TI212.'..T" 2.2.T:.T.......

Page 37 of 78

- Relief Request ISI-24 for CCNPP Unit I Class Code Category B-D -

Code Item B3.110 I Components CCNPP Component ID:

16-405B NDE Report No.:

CC06-1U-066 LTPNo.:

004200 SummaryNo.:

004200 Coverage Sketch No: Exam Area MO No.: 1200500749 Exam Area:

AFGLBCKDH]E Scale:

50%

Exam Angle:

NA (Sketch Resized for Relief Request)

Page 9 of 9 Diameter:

96" Thickness:

5.00" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Weld Metal Area:

FGHJ = (0.85 x 5.4) = 4.59 in 0

Base Metal Area:

Vessel Side = AFJE = (1.95 x 5.4) = 10.53 in 0

Nozzle Side = GKDH + GLM + LKM + LBCK S=

(1.95x5.4) + (1 xO,6)/2 +-(1 xO.6)/2 + (1 xO.6) =11.73 in, Total Base Metal Area = 10.53 + 11.73 = 22.26 in2 Total Exam Area: 4.59 + 22.26 = 26.85 In2 Cove:rage Diensions Beam Directions Exam Area

'23 5"6 S

ketch.26.85 ANay from Nozzle:

.L Weld Meta 1, 23 F 1

See Sketch 4.59.

.o i*se Base

~

Me.al

23.

4.

.e Sec......2.6.

e Weld Metal: Volume =

4.591 Square Inches Cove.age.

Beam... Percent of Beam No.

Angle Sketch S u. In.

Total 4.59 1

45°T 1

4.25 4.25 92.59%

2 45"1 2

0.00 0.00 0.00%

3 60eT 3

4.34 4.34 94.55%

4 60 4

0.00 0.00 0,00%

5 45 5 5 1.38 1.38 30,07%

6 45°-

5 1.38 1.38 30.07%

7 60'-

5 1.38 1.38 30.07%

, 8

50.

5 1.38 1.38 30.07%

0 WRV 5

1.38 1.38 30.07%

Tota Beas 5Total Percenit P 3 3 T.O 7 %

L Total Weld Metal ccnem6.

37.50%

Base Metal: Volume i 22.26 Square Inches

_..._ Coverage.....Beam Percent of Beam No.

Angle Sketch ISqu. In.)

Total 22.26 1 +2 451/60 "

6 18.48 18.48 83.02%

83.02%

3 45*-

7 10.53 10.53 47,30%

4 4580 7

10.53 10.53 47630%

5 60'-

7 10.53 10.53 47.30%

6 670°*

7 10.53 10.53 47+30%

7 0 WRV 7

10.53 10.53 47.30%

J..

J Total BeamsG Total Percent: ! 402.56%

Total Base Metal Coverage:!

57.51%

Base Metal:.

ovnerage Percent 57.51%

total Ioa4.....

Volume

~~TVolume

=

.Rsl 2226 5..

47....8..

.., 21

21.

2

.Tota

.6am 1

,408%A

?........

....... i.....................

otlExam Coveraae =

.. 54.09%..

I Page 38 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.130 Responses to Request for Additional Information Summary No.: 100805 Comp ID: SG-11-W5 Page 1 of 8 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

SG Inlet Nozzle to Primary Head Nozzle / Machined transition on nozzle extension limited base metal coverage. The steam generator nozzle-to-vessel head welds are accessible only from the head side based on the designed nozzle configuration. The proximity of the nozzle radius prevented full examination coverage from the nozzle side. Scanning was performed from the nozzle; however, the ultrasonic waves did not cover the Code required examination volume at an angle that will interrogate the weld volume for in-service flaws.

The NDE techniques and procedures used incorporated examination techniques qualified under Article 4 of Section V of the ASME Code as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and Shear. Insonification angles were as indicated on the scan.,

tables on the attached sketches.

2.1 1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 39 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D - Code Item B3.130 CCNPP Component ID:

SG-11-W5 NDE Report No.: CC06-1U-041 LTP No.:

100805 SummaryNo.: 100805 Coverage Sketch No; 1

MO No,: 1200500777 Exam Area: Weld Metal 3600 Scale:

50%

Exam Angle:

450 (Sketch Resized for Relief Request)

Page 2 of 8 Diameter: 42" Thickness:

7.30" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel E 45' T Coverage = 14 inGof 14 in2 exam area 1

.Coverage Dimensions

Beam Directions Eengt Ara Wndt

9.

si

l. -

ag0 quayro Nozzle

.a.

na.............~etc 0... Away

.ro W........el Metal 0.

74 14.00..

Base Metal:

See7.

Sketch 1

55.00 Counter clockwise:>-

Weld Metal: Volume ei 14.O0iSquare Inches CoveLage.Beam Prenq Beam No.

Anxle Sketch (S u. In.)

Total.

14.00 1

45°t 1

14.00 14.00 100.00%

2 450' 2

7.96 7.96 56.86%

3 60' 3

14.00 14.00 100.00%

4 600' 4

10.36 10.36 74.00%

5 450-5 14.00 14.00 100.00%

6 45"*-

5 14.00 14.00 100.00%

7 600-5 14.00 14.00 100.00%

8 160*-

5 14.00 14,00 100.00%

i 9 0' WRV 5

14.00 14.00 100.00%

t..........

Toaleas9 Total Percent:. 830.86%

faiW.

eld Metal.Co~verage: 92.32%

Base Metal: Volume = 1 55:00 ISquare Inches I

Co..rage.

Beam..

Pe*renl !.

Beam No.

An te Sketch (Squ! in.)

Total 55.00 97.42%

1.+2 45°/60't1 6

53.56 53.58 97.42%--*/

3 45'-

7 41 41 74.55%

4 45'_

7 41 41 74.55%

5 60'-

7 41 41 74.55%

6 60'-

7 41 41 74.55%

7 0 WRV 7

41 41 74.55%

TtlBeams: 7 Total Pe~rcen 50'W790%_

Total Base Metal Coverage 81q08%I

-1 I........

Combined Coverase

.l..

Coveracen.

l................

6 a se Metal 8 109.% '.

Volume

.14.00 i55.00 I

Total 68.00 18"7l*

Totel E. am Covera**

3.36I Page 40 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class Code Category B-D -

Code Item B3.130 1 Components CCNPP Component ID:

SG-11-W5 NDE Report No.:

CC06-1U-041 LTP No.:

100805 Summary No.:

100805 Coverage Sketch No:

2 MO No.: 1200500777 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

450 (Sketch Resized for Relief Request)

Page 3 of 8 Diameter:

42" Thickness:

7.30" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel 45 $ Coverage= 7.96 in~of 14 in2 exam area =

Coverage Dimenslons Beam Directions a

x00, I7Tl n4ss

=

j o i)

'Twr oze 4

.Eam

~

0 e Sketch.

69e.00 Away lfrom.Nozzle t' Weld. Mea.....

15 794 i4.00 Clockwisea

...............7..See Sk tch 5

0 Counter c kwise.

Weld Metal: Votame 14.00 iS S

are Inches I

Coverage.Beam Percent of Beam No.

Angle Sketch S(aS. In.)

Total 14.00 1

45"t 1

14.00 14.00 100.00%

2 45" I

2 7.96 7.96 56.66%

3 60oT 3

14.00 14.00 100.00%

4 60I o

4 10.36 10.36 74.00%

5 450-5 14.00 14.00 100.00%

6 45*-

5 14.00 14.00 100.00%

7 60'-

65 14.00 14.00 100.00%

a 60-5 14.00 t

14.0 0 100.00%

S W

OWRV 5

14.00 14.00 100.00%

Total Beams:

T o

Ttal CPercent:

2.302%86%

Total Weld Metal Coverage:

92.32%

Base Metal: Volume a 55.00 iSquare Inches Coverage Beam Percent of Beam No.

An le Sketch l

o. Ito.

Total 5.00.

1 + 2 45-160-11 6

53.58 53.56 97.42%

97.42%

3 45*-

7 41 41 74.55%

4 45*-

7 41 41 74.55%

5 60*-

7 41 41 74.55%

6 60'-

7 41 41 74,55%

7 00 WRV 7

41 41 74.55%

Total 7ea.ms 7

Tota l Percent..

567.56%

Totld Base Metal coveragea:: 81.08% ~1 Combined Coverage tuoverage WeldltMetal: 9.3%

81.08 a.i. i.i....8i 0.......

x 55.66iii Total

:volume'.

Il Kesul1

............. ; v ld i " ° * "" }

iit...........

69.00 18 73%

6900 6

3

-Total Exam Roveraae 81.36%

J Page 41 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.130 CCNPP Diameter: 42" Page4of8 Component ID:

SG-11-W5 NDE Report No.:

CC06-1U-041 Thickness:

7.30" LTP No.:

100805 SummaryNo.:

100805 Material:

CC/S Coverage Sketch No:

3 MO No.:

1200500777 Cc/S = Clad Carbon Steel Exam Area:

Weld Metal 3600 Scale:

50%

S/S = Stainless Steel Exam Angle:

60' CASS Cast Stainless Steel (Sketch Resized for Relief Request)

-60 T Coverage= -

4 n'of 14 in2 exam area =

CoverageDimnensions Beam Directions Weld Metal: Volm.

14.0 66 u

Inches ase Metal: Volu.

00 Suare Inches I

Coverage Beam Percent of Bearn No.

Angle Sketch (S4u ln.

Total 1400 1

45*T 1

14.00 14.00 100.00%

2 45-1 2

7q96 7.96 56.86%

3 60"1 3

14.00 14,00 1o0,00%

4 60"-

4 10.36 10.36 74.00%

5 45*-

5 14.00 14.00 100.00%

6 45'-

5 14.00 14.00 100.00%

7 60'-

5 14.00 14.00 100.00%

8 60*-

5 14.00 14.00 100.00%

0'O WRV 5

14.00 14.00 100.00%

I..................

T l'uoverage 1 neam I ýercent vr Beam No, Angle Sketch ISgu. n.1 Total 55.00.

97.42%

31 2

'/60 1

6 53.58 545 74 74.

3 1 45°-

7 1

41 1

41 174.55%

4 451'-

7 41 41 74.55%

5 60' -

7 41 41 74.55%

6 60'-

7 41 41 74.55%

7 10' WRV 1 7

1 41 1

41 1 74.55%

.7j....

Total Beam, 7

Total ercent 567 56%

.................. i..............

.* ; ) r e '

I............

Total Bane Metal Coveýaga 61,08%

i I

Combined Coverage CoerageToal Weld. Metal...Vol.me...............

2:32%..1400.6000 T

9 9..

3..7.

Total Exam Cover..e =

63.36%

Page 42 of 78 J

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.130 CCNPP Component ID:

SG-11-W5 NDE Report No.:

CC06-1U-041 LTP No.:

100805 SummaryNo.:

100805 Coverage Sketch No:

4 MO No.:

1200500777 Exam Area:

Weld Metal 360' Scale:

50%

Exam Angle:

600 (Sketch Resized for Relief Request)

Page 5 of 8 Diameter: 42" Thickness:

7.30" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel A

I" Inlet Nozzle Primary Head 60* 4 Coverage = 4.65 in.

Supplemental 35°1 Coverage = 5.72 in2 Total: (4.65 + 5.72) = 10.36 in of 14 in2 exam area = 74%

Coverage pimenslons........................Beam Directions i~e.........7..........

1.

Exm a~6~9.00 Awayjtram Nozzle: 1f eas.Mta..a 7.4.

e IFth

. 50 coverage 1..beam 1 Percent at, Beam No.

Angle Sketch (Squ. In.)

Total 14.00 1

45° 1

1 14.00 14.00 100.00%

2 45' 2

7.96 7.96 56.B5%

Base Metal: Volume =

55.00 Square Inches SCoverag Beam Percent of Beam No.

An le Sketch 1S qu In.)

Total.

5500...

1 2 45"/60U-6 53.58 53.58 97.42%

3 45" 7

41 41 74.55%

4 45T-7 41 41 74.55%

5 600" 7

41 41 74.55%

6 90'-

7 41 41 74.55%7/

3 60'1 3

14.00 14,00 100.00%

4 60' 4

10.36 10.36 74.00%

5 450-5 14.00 14.00 100.00%

6 45*-

5 14.00 14.00 100,00%

7 o60=

5 14.00 14.00 100.00%

8 60'o 5

14.00 14.00 100.00%

9 0 WRV 5

14.00 14.00 100.00%

IoTotalsWeld Metal Coverage:l 92.32%

7 0 OWRV 1 7

I 41 1

41 74.55%

.........i Total Percent:

567 Total Base Metal Coverane:

91

'.56%

T....

I Combined Coverage P oeragent Weld Metal:

92.32%

'Base Metal"l g'i*6*.i iK..2t2i* 2i X

V6lume

'"*55 "'"O 14.........

,00g55 0500....[

........... Zii!il

-i Volame1 ---

esul

.... e.

...* i....................

69.00 i

leta Exa uoerae

=

83.36%

i Page 43 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class Code Category B-D - Code Item B3.130 1 Components CCNPP Component ID: SG-11-W5 NDE Report No.: CC06-1U-041 LTP No.:

100805 Summary No.:

100805 Coverage Sketch No:

5 MO No.:

1200500777 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

450 / 600

/ 00WRV (Sketch Resized for Relief Request)

Page 6 of 8 Diameter: 42" Thickness:

7.30" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel

]

45-

/ 60°-9 /0 0 WRV Coverage = ijin of 14 in" exam area = 1001' Coverage Dimensions R..

Beam Directions Exam Ara

. i. a

+..

'e S.

.t 69.00 Away...

.itm Weld Metal:

na 19..................

.cc Se.

Base Metal:,

a

7.

S6 Setch:

55:00 Counter ClockNiseK-Weld Metal: Volume =:

14.00 Square Inches Coverage.......Beam Percent of Beam No.

Anle Sketch iS u. In.)

Total 14,00 1

45°T 1

14.00 14.00 100.00%

2 45%

2 7.96 7.96 56.86%

3 60.[

3 14.00 14.00 100.00%

4 60"1 4

10.36 10.36 74.00%

5 45" -

14.00 14,00 100.00%

6 45*-

5 14.00 14.00 100.00%

7 60%-

5 14.00 14.00 100.00%

0 60*-

5 14.00 14.00 100.00%

9 0 WRV 5

14.00 14.00 100.00%

Total Beams: 9 TotalPercent:

830.56%.

TotalIWeld Metal Coverage:z 92.32%

Base Metal: Volume =

55.00 iSquare Inches I

I Coverage Beam Percent of Beam No.

Angle Sketch "S'a. In.)

Toia.

55.00 1

+2 45 "/60 11.

6 53.58 53.58 970 42%

97.42%

3 45"-

7 41 41 74.55%

4 45°-

7 41 41 74.55%

5 60*-

7 41 41 74.55%

6 60'-

7 41 41 74,55%

7 0"WRV 7

41 41 74.55%

Toal Beams:?

Total Perco:

56 756%

...a.

ease Metal....6:

Combined Coverage Coverag Total Peren -

Volume Volume Result' WeldMeta..2.%.140................

fi c

2 61 I

0

1. 73%

Base Metal+,8 09%

61 55.00 G9 6900 64.63%

..# i* *.

Total Exam Coverage =6 83.36%

Page 44 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D - Code Item B3.130 CCNPP Component ID:

SG-11-W5 NDE Report No.:

CC06-1U-041 LTP No.:

100805 Summary No.: 100805 Coverage Sketch No:

6 MO No.: 1200500777 Exam Area:

Base Metal 3600 Scale:

50%

Exam Angle: 450

/ 60'

/

(Sketch Resized for Relief Request)

Page 7 of 8 Diameter: 42" Thickness:

7.30" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Inlet Nozzle Primary Head Coverage by at least 2 sound beams = 53.20 inW.

I Coverage by 1 sound beam only = 0.76 in'.

Total: 53.20 + (0.76 /2) = 53.58Wof 55 in2 exam area =i9A2%

Covrage IJimenalons Exam Area no Weld Metal no e9ýase Meta.

no 9 ! e s n s r...........

T

i.0e i 7.4 7

......... sere Sketch I,..s :t:}.

69o00 55.00 Beam Directions Counter Clockwise:

Wmed Metal; Volume n*h*q ncnes Beam No.

S oC vrage I Beam Percent of An..

Rketch ISt. In.I Total 1

14.0 Beam No I Anole ISketch 11!1=..Ingel beam I Percent ot Total 55.00 1

2 45°/60"TJ 6

53.58 53.58 9742%

97.42%

3 45*-

7 41 41 74.55%

4 45'-

7 41 41 74.55%

5 60'-

7 41 41 74.55%

6 60*-

7 41 41 74+55%

7 0* WRV 7

41 41 74.55%

.. i..................

ta...

e........

T.ta ~ r *n.....

5 3.5 0%

Tot a

l Bas7 Total Percent:!

57.50%

Total Base Metal coverage:

1.%

Total Bea oal Weld Metal Coverage:l 92.32%

nbinad Cay aae Poergen,

ol Weld Mealý 9 V

1 0*

Total i'

- " ".......... " 'R

' l "...........

69.00 1 73%

Tot al E xam Coeag 3.

Page 45 of 78

Enclosure I - Relief Request ISI-24 for CCNPP Unit I Class I Components Code Category B-D - Code Item B3.130 CCNPP Component ID: SG-11-W5 LTP No.:

100805 Coverage Sketch No:

7 Exam Area:

Base Metal 360' Exam Angle:

450

/600

/00WRV NDE Report No.: CC06-1U-041 Summary No.: 100805 MO No.:

1200500777 Scale: 50%

Page 8 of 8 Diameter: 42" Thickness:

7.30" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for. Relief Request)

Inlet Nozzle Primary Head EIM 45"- / 60"-

/ 0* WRV Coverage = 41 in 0 of 55 inW exam area = 74.55%

Coverage Dimensions Beam Directions Length WdtW~j~hIOiS~s IResul6_____

1 Lenti~l=X=4-Wd~h 7cka-e`ý'

Towa~rd

-Nozzle: iT4 Exam Ara uSee Sketch on90 Wel. Metal n

W74 S

.001 14

?ý4 Cloc isw:..

ease Metal:

na s

74

'See Sketch.

50 ooe~oh~-

Weld Metal: Volume =i 14.00 'Square Inches I

Coverage Beam Percent of Beam No.

An le Sketch (Squ. In.

iota I

.0 1

45"T 1

14.00 14.00 100.00%

2 45"1 2

7.96 7.96 56.86%

3 60eo 3

14.00 1400 100.00%o 4

60-1 4

10.36 10.36 74.00%

5 450-5 14.00 14.00 TOO.00%

6 45'-

5 t4.00 14,00 100.00%

7 60*-

164.00 14,00 100.00%

8 60-5 14.00 14,00 100.00%

9 0* WRV 5

14.00 14,00 100.00%

................. i.........

...........i..............

Total.Beams....Total P...

.t:.

5306%*

Total Weld Mejol Covera es I 52d32%

Base Metal: Volume =1 55.00 ISquare Inches i

1 verage Beam IPercent ot Beam No.

Angle Sketch I Sau. In.)

ota.l 155..0 t + 2 45°/60"1 6

53.55 53.55 97,42%

97.42%

3 450-7 41 41 74.55%

4 45*-

7 41 41 74.55%

5 60Y-7 41 41 74.55%

6 60*-

7 41 41 74.55%

7 0* WRV 7

41 41 74.55%

i.........................

2

, 2 L

Tot*lBýe*as:

7 Total Percent:

567.56%

Total Base Metal Covera qe::

1.08%

Coamined Cov.ea ge i

.Coverage~

Total Percent x

Volum~e.

oueI 1.......

Base Metal: 5_1.08%

550 590 64.63%

650 I......

d Page 46 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class I Components Code Category B-D -

Code Item B3.130 Responses to Request for Additional Information Summary No.: 100955 Comp ID: SG-11-W6 Page 1 of 7 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

SG Outlet Nozzle to Primary Head Nozzle / Machined transition on nozzle extension limited base metal coverage. The steam generator nozzle-to-vessel head welds are accessible only from the head side based on the designed nozzle configuration. The proximity of the nozzle radius prevented full examination coverage from the nozzle side. Scanning was performed from the nozzle; however, the ultrasonic waves did not cover the Code required examination volume at an angle that will interrogate the weld volume for in-service flaws.

The NDE techniques and procedures used incorporated examination techniques qualified under Article 4 of

-Section V of the ASME Code as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 47 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.130 CCNPP Component ID:

SG Weld 6 LTP No.:

100955 Sketch:

Exam Area NDE Report No.:

CC10-1U-064 M.O. No.:

Scale:

50%

Page 2 of 7 Diameter: 30" Thickness:

5" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow AD = 5.2" BC = 4.2" DC = 6.7" AE DF = 2.8" FC = 3.9 Shell Nozzle l,

/

6 U

I-Exam Area ABCD AEFD + EBCF (2.8 x 5.2) + 3.9((5.2 + 4.2)/2) = 32.89 in2 Coverage Sound Sketch Angle Direction Coverage 1

450 With Flow 60A7%

2 45*

Against Flow 6222%

3 60

- With Flow 22.04%

4 6W Against Flow 28.28%

5 45 CW 99.03%

5 45" CCW 99.03%

5 No, 0

CW 99.03%

5 60 CCW 99,03%

5 0*

WRV 99.03%

TOTAL 668.16 668.16 9 Sound Beams 74,24 Achieved 74.24% Coverage Page 48 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class Code Category B-D -

Code Item B3.130 1 Components CCNPP Component ID:

SG Weld 6 NDE Report No.:

CC10-1U-064 LTP No.:

100955 M.O. No.:

Coverage Sketch No:

1 Scale:

50%

Exam:

350/450 (With Flow)

(Sketch Resized for Relief Request)

Page 3 of 7 Diameter: 30" Thickness:

5" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow 45°

\\4 Shell Nozzle NOTE: The 45' exam was supplemented with a 35' exam due to the 14* OD taper.

Exam Area ABCD = 32.89 in' With Flow Examined ABCD - AEFD 32.89 - (5.2(0.7 + 4.3)/2) = 19.94 in' 19.94 / 32.89 = 60.47%

Coverage Sound Sketch Angle Direction Coverage 1

456 With Flow 60.47%

2 45*

Against Flow 62,22%

3 80 With Flow 22.04%

4 I0W Against Flow 28.28%

5 45 CW 99.039 5

459 CCW 99,03%

5 600 CW..

99.03%

5.

600 CCW 99.03%

5

0.

WRV 9.03%

TOTAL 668.16 668:16/9 Sound Beams = 74.24 Achieved 74.24% Coverage Page 49 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class Code Category B-D -

Code Item B3.130 1 Components CCNPP Component ID:

SG Weld 6 LTP No.:

100955 Coverage Sketch No:

2 Exam:

350 / 450 (Against Flow)

NDE Report No.:

M.O. No.:

Scale:

CC10-1U-064 50%

Page 4 of 7 Diameter: 30" Thickness:

5" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow NOTE: The 45* exam was supplemented with a 35' exam due to the 14" OD taper.

Exam Area ABCD = 32.89 in2 Against Flow Examined ABD - AEH + FCG (6.7 x 5.2)/2 - (0.4 x 0.4)/2 + (2.5 x 2.5)/2 = 20.47 in' 20.47 / 32.89 = 62.22%

Coverage Sound Sketch Angle Direction Coverage 1

45' With Flow.

60.47%

2 45 i Against Flow 62.22%

3:

60 With Flow 22.04%

4 600 Against Flow 28.28%

5 45*

CW 99.03%

5 450 CCW 99.03%

5 60 CW 99.03%

5 60N CCW

.99.03%

O 0'

WRV

,99.03%

___8___/

TOTAL 668.16 668.16/9 Sound Beams = 74.24 Achieved 74.24% Coverage Page 50 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.130 CCNPP Component ID:

SG Weld 6 LTP No.:

100955 Coverage Sketch No:

3 Exam:

60° (With Flow)

NDE Report No.:

M.O. No.:

Scale:

CC10-1U-064 50%

Page 5 of 7 Diameter: 30" Thickness:

5" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized forRelief Request)

Flow Exam Area ABCD = 32.89 in2 With Flow Examined EBF (5.8 x 2.5)/2 = 7,25 in2 7.25/32.89 = 22.04%

Coverage Sound Sketch Angle Direction Coverage 1

45' With Flow 60A7%

2.

45 Against Flow 62,22%

3

60.

With Flow 22.04%

4 60° Against Flow 28.28%

5 45" CW 99.03%

5 450 CCW 99.03%

5 600 CW 99.03%

5 60 CCW 99.03%

5 00 WRV 99.03%

TOTAL 668.16 668.1619 Sound Beams = 74.24 Achieved 74.2.4% Coverage Page 51 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.130 CCNPP Component ID:

SG Weld 6 NDE Report No.:

CC10-1U-064 LTP No.:

00955 M.O. No.:

Coverage Sketch No:

4 Scale:

50%

Exam:

600 (Against Flow)

(Sketch Resized for Relief Request)

Page 6 of 7 Diameter: 30" Thickness:

5" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Exam Area ABCD = 32.89 in Against Flow AJK-AEH+FCG (2.5 x 1.5)/2 - (0.5 x 0.3)/2 + (3 x 5)/2 = 9.30 in2 9.30 / 32.89 = 28.28%

Coverage Sound Sketch Angle Direction Coverage 1

-45*

With Flow M0.47%

2 45*

Against Flow 62.22%

3 60 With Flow 22.04%

4 60*

Against Flow 28.28%

5 45-CW 99030/o 5

45*

CCW 99.03%

5

60.

CW 9903/6 5

60a CW 99W03%

5 00 WRV 99.03%

TOTAL 668.16 668.16/9 Sound Beams = 74.24 Achieved 74.24% Coverage Page 52 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class Code Category B-D -

Code Item B3.130 1 Components CCNPP Component ID:

SG Weld 6 LTP No.:

100955 Coverage Sketch No:

5 Exam:

450

& 600

& 00 WRV NDE Report No.:

M.O. No.:

Scale:

CC10-1U-064 50%

Page 7 of 7 Diameter: 30" Thickness:

5" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Shell Nozzle Exam Area ABCD = 32.89 in2 With Flow Examined ABCD - ECF 32.89 - (1.6 x 0.4)/2 = 32,57 in2 32.57 32,89=99,03%

Coverage Sound Sketch.. Angle Direction Coverage I1 45*

With Flow 60.47%

2 45*

Against Flow 6222%

3 60*

With Flow 22.04%

4 60" Against Flow 28.28%

5 45*

CW 99.03%

5 450 CCW 99.03%

5 60 CW 9903%

5 600 CCW 99.03%

5 '

0 W`RV 9 9-10_3___

TOTAL 668.16 66816 19 Sound Beams = 74.24 Achieved 74.24%

/Coverage Page 53 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.130 Responses to Request for Additional Information Summary No.: 103205 Comp ID: SG-11-W7 Page 1 of 7 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2. 1. 1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

SG Outlet Nozzle to Primary Head Nozzle / Machined transition on nozzle extension limited base metal coverage. The steam generator nozzle-to-vessel head welds are accessible only from the head side based on the designed nozzle configuration. The proximity of the nozzle radius prevented full examination coverage from the nozzle side. Scanning was performed from the nozzle; however, the ultrasonic waves did not cover the Code required examination volume at an angle that will interrogate the weld volume for in-service flaws.

The NDE techniques and procedures used incorporated examination techniques qualified under Article 4 of Section V of the ASME Code as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 54 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D - Code Item B3.130 CCNPP Component ID:

SG Weld 7 LTP No.:

103205 Coverage Sketch No:

1 Exam:

35' / 450 (With Flow)

NDE Report No.:

M.O. No.:

Scale:

CC-1U-065 C120090648 50%

Page 2 of 7 Diameter: 30" Thickness:

5" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow A

E 45,

\\4 Shell Nozzle NOTE: The 45' exam was supplemented with a 35° exam due to the 14' 00 taper.

Exam Area ABCD = 32.89 in2 With Flow Examined ABCD - AEFD 32.89 - (5.2(0.7 + 4.3)/2) 19.94 in2 19.94 / 32.89 = 60.47%

Coverage.

Sound Sketch' Angle Direction Coverage 1

45*-

With Flow 60.47%

2 450 Against Flow 62.2%

3 60° With-Flow 22.04%

4 6W' Against Flow 28.28%

5 45*

CW 99.03%

5 45° CCW 99.03%

5 "60 W

99.03%

5 60o CCW 99.03%

5 0o WRV 99.03%

TOTAL 668.16 668.1619 Sound Beams =74.24 Achieved 74.24% Coverage.

Page 55 of,78

- Relief Request ISI-24 for CCNPP Unit 1 Class Code Category B-D -

Code Item B3.130 1 Components CCNPP Component ID:

SG Weld 7 LTP No.:

103205 Coverage Sketch No:

2 Exam:

359 / 450 (Against Flow)

NDE Report No.:

M.O. No.:

Scale:

CC-IU-065 C120090648 50%

Page 3 of 7 Diameter:

30" Thickness:

5" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow NOTE: The 45* exam was supplemented with a 35* exam due to the 14° OD taper.

Exam Area ABCD = 32.89 in' Against Flow Examined ABD - AEH + FCG (6.7 x 5.2)12 - (0.4 x 0.4)12 + (2.5 x 2.5)/2 = 20.47 in2 20.47 / 32.89 = 62.22%

Coverage.

Sound Sketch Anie Direction Coverage 1

45°"

With Flow 60.47%

2 450 Against Flow 62.22%

3 60-With Flow 22*04%

4

.60 Against Flow 28.28%

5 45" CW 89.03%

5 45*

CCW 99.03%

5 60° CW 99.03%

5 CCW

-93f91.

03%

Y 5

00 WRV 99.03%

TOTAL 668.16 668.1619 Sound Beams = 74.24 Achieved 74,24% Coverage Page 56 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.130 CCNPP Component ID:

SG Weld 7 LTP No.:

103205 Coverage Sketch No:

3 Exam:

600 (With Flow)

NDE Report No.:

M.O. No.:

Scale:

CC-1U-065 C120090648 50%

Page 4 of 7 Diameter: 30" Thickness:

5" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow A

E B

Shell Nozzle D

C Exam Area ABCD = 32.89 in2 With Flow Examined EBF (5.8 x 2.5)/2 = 7.25 in2 7.25 / 32.89 = 22.04%

Coverage Sound Sketch Angle Direction Coverage 1

45!

With Flow 60A47%

2 45° Against Flow 62,2%

3 60?

With Flow

.22.04%

4 6

Against Flow

.28.28%

5 45*

CW 99;03%

5 45*

CCW 99.03%

5 60 CWM 99.03%

5

.60 CCW 99.03%

5 0-WRV 99.03%

TOTAL 668.16 668.16 /9 Sound Beams = 74.24 Achieved 74.24% Coverage Page 57 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category B-D -

Code Item B3.130 CCNPP Component ID:

SG Weld 7 LTP No.:

103205 Coverage Sketch No:

4 Exam:

600 (Against Flow)

NDE Report No.:

M.O. No.:

Scale:

CC-IU-065 C120090648 50%

Page 5 of 7 Diameter: 30" Thickness:

5" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow A

E Shell A.*

Nozzle Exam Area ABCD = 32,89 in' Against Flow AJK-AEH+FCG (2.5 x 1.5)/2 - (0.5 x 0.3)/2 + (3 x 5)/2 = 9.30 in2 9.30 / 32.89 = 28.28%

Coverage Sound Sketch Angle Direction Coverage 1

45, With Flow 60.47%

2 45D Against Flow 62.22%

3 606 With Flow 22.04%

4 60 Against Flow 28.28%

5 45*

CW:

99.03%

5 45-CCW:

99.03%

5

60.

CW; 99.03%

5 60*

CCW 99.03%

5 0*

WRV:

99.03%

TOTAL 668.16 668,1619 Sound Beams 74.24 Achieved 74.24%:Coverage Page 58 of 78

- Relief Request ISI-24 for CCNPP Unit I Class Code Category B-D - Code Item B3.130 1 Components CCNPP Component ID:

SG Weld 7 LTP No.:

103205 Coverage Sketch No:

5 Exam:

450

&600

&O0 WRV NDE Report No.:

M.O. No.:

Scale:

CC-1U-065 C120090648 50%

Page 6 of 7 Diameter: 30" Thickness:

5" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Shell Nozzle Exam Area ABCD = 32.89 in2 With Flow Examined ABCD - ECF 32.89 - (1.6 x 0.4)/2 = 32.57 in2 32.57 / 32.89 = 99M%

Coverage Sound Sketch Angle DireCtion Coverage 1

45.

With FlO 607%

2 45Z Against Flow 62,22%

3 60W With Flow 22.04%

4.

60,..Against Flow 28.28%

5 45' CW 99.03%

5 45" CCW 99.03%

5 60

CW 99.03%

5 No CCW 99.03%

5 0*

WRV

.99.03%

TOTAL 668.16 668.16/9 Sound Beams = 74,24 Achieved 74.24% Coverage Page 59 of 78

- Relief Request ISI-24 for CCNPP Unit I Class I Code Category B-D - Code Item B3.130 Components CCNPP Component iD:

SG Weld 7 LTP No.:

103205 Sketch:

Exam Area NDE Report No.:

CC-1U-065 M.O. No.:

C120090648 Scale:

50%

Page 7 of 7 Diameter: 30" Thickness:

5" J

Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow AD = 5.2" BC = 4.2" flC = *7 TDC

=.....

E DF = 2.8"

F lO W(" Flow Exam Coverage. X =

Axial Exam =100%

"Circ Exam - See Sketch 3 NOTE: Same coverage for quadrants 90* & 270:

° =..,,

,,°.:.,.,:..°p.. °... ____________________________SS Clad ~Ouadrant V kil C ire' I O ~ 100% i 0%~ Ii ~27 ~1 i00%~ 50%7J ~Tot~

GOY, T50%

Tbta14* 100%37.5%> Total Coveri§e (I041-)4-o-5 Page 73 of 78 Enclosure I - Relief Request ISI-24 for CCNPP Unit 2 Class 2 Components Code Category R-A - Code Item R1.20 CCNPP Component ID: 10/12-SI-1009 NDE Report No.: CC08-1U-020 LTP No.: 102650 Summary No.: 102650 Coverage Sketch No: 3 MO No.: 1200702221 Exam Area: 1800 Quadrant Scale: 100% Exam Angle: 450 / 700 (Sketch Resized for Relief Request) Page 4 of 4 Diameter: 12" Thickness: 3.00 Material: CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Exam Coverage:

Axial Exam - See Sketch 2

CIrc Exam: 50%

NOTE: Same coverage for quadrants 90* & 2700 30" RC Pipe II...i i7 i i............... 12' Branch Conn.

,-.'oo°+°...

[ii~i: ::::: 1::::: i i ! i i i i i~ i i~ ii i!!! iii iii i iii W SS Clad ___SS Clad . CverageC71cu'tifton jTotaI Coverage: (106 +'37.5)12 6. Page 74 of 78 - Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category R-A - Code Item R1.20 Responses to Request for Additional Information Summary No.: 115950 Comp ID: 12-SI-1011-12 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows: 2.1.1 a) Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Pipe to Safe End / No Code coverage was credited for scanning performed from Cast Stainless Steel Safe End side of weld. The ultrasonic examination of the above pipe weld was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper). For this weld obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the weld received a single-sided examination or partial two-sided examination resulting in less than 90%

coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 75 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category R-A -

Code Item R1.20 CCNPP Component ID:

12-SI-1011-12 NDE Report No.: CC08-1U-034 LTPNo.:

115950 SummaryNo.:

115950 Coverage Sketch No:

I of I MO No.:

1200702210 Exam Area:

Inner Scale:

100%

Exam Angle:

600 Page 2 of 2 Diameter:

12" Thickness:

1.125" Material:

CASS TO S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Exam Coverage = 50% as per single sided access rules.

No coverage credit taken for 45* RL exam from Safe End side.

Page 76 of 78

- Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category R-A - Code Item R1.20 Responses to Request for Additional Information Summary No.: 123700 Comp ID: 4-SR-1006-4 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and.

therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Pipe to Tee / Scanning from Tee side of weld limited due to proximity of transition on Tee to the weld. The ultrasonic examination of the above pipe weld was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper). For this weld obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the weld received a single- "'

sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the, aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an

alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and, calculations.

Page 77 of 78

Enclosure I - Relief Request ISI-24 for CCNPP Unit 1 Class 1 Components Code Category R-A -

Code Item R1.20 CCNPP Component ID: 4-SR-1006-4 NDE Report No.:

CC06-1U-043 LTP No.:

123700 Summary No.:

123700 Coverage Sketch No:

1 of 1 MO No.:

1200500749 Exam Area:

Inner Scale:

100%

Exam Angle: 450 / 600 /

(Sketch Resized for Relief Request)

Page 2 of 2 Diameter: 4.0" Thickness:

0.44" Material:

S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Angles Measured In Component:

Nominal 60* = 540

Nominal 700 = 62*

fScan Limitatilon:

,Axial.exam from Tee side obstructed for 4* of14-25., by Tee Configuratbon.

Circ exam from Tee. side obstructed for 360" by Tee configuration.

Coverage.Calc:

Axial scan pipe side = 14.25", of 14.25T 1O%/

Axial scan tee side = 10.25" of 14.25" = 720%.

, Circ scan pipe side = 14.25" of i4.25" = 100%.

Circ scan tee side = 0" of 14.25" = 0%.

Total: (100-+72 +100 + 0) / 4 = 68%.

Page 78 of 78

ENCLOSURE2 Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Calvert Cliffs Nuclear Power Plant, LLC December 16, 2010

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category C-A -

Code Item C1.10 Responses to Request for Additional Information Summary No.: 252000 Comp ID: SCHE-11-1 Page 1 of 4 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Channel Barrel-to-Flange / Close proximity of Flange transition to the weld limits attaining full coverage from the flange side of Weld. The ultrasonic interrogation of the channel shell to flange weld could only be partially obtained from flange side due to the component configuration and close proximity of the weld to the flange transition. The nondestructive examination (NDE) techniques and procedures used incorporated similar examination techniques qualified under Appendix III of theASME Section XI Code, as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 1 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category C-A - Code Item Cl. 10 CCNPP Component ID:

SCHE-11-1 NDEReportNo.:

2000BU011 LTP No.:

252000 SummaryNo.:

252000 Coverage Sketch No:

1 MO No.:

1199904472 Exam Area:

360' (147.5")

Scale: 100%

Exam Angle / Direction:

450 Ax Upst (Sketch Resized for Relief Request)

Page 2 of 4 Diameter: 45" Thickness:

1.25" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Flan9e I

5SS

~S C2laddino Channel Barrel SS Clardinn E

45' Axial Coverage from Upstream side = 43%

Page 2 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category C-A -

Code Item CIO10 CCNPP Component ID: SCHE-11-1 NDE Report No.:

2000BU011 LTP No.:

252000 Summary No.:

252000 Coverage Sketch No:

2 MO No.:

1199904472 Exam Area: 3600 (147.5")

Scale:

100%

Exam Angle / Direction:

450 / 600 Ax Dnst (Sketch Resized for Relief Request)

Page 3 of 4 Diameter: 45" Thickness:

1.25" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Flange_.

45' Channel Barrel E'

45'/ 60* Axial Coverage from Downstream side = 94%

Page 3 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category C-A -

Code Item C1.10 CCNPP Component ID:

SCHE-11-1 NDE Report No.:

2000BU011 LTP No.: 252000 SummaryNo.:

252000 Coverage Sketch No: 3 MO No.:

1199904472 Exam Area: 3600 (147.5")

Scale:

100%

Exam Angle / Direction:

450 CW / CCW (Sketch Resized for Relief Request)

Page 4 of 4 Diameter:

45" Thickness:

1.25" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow

[

45" CW / CCW Coverage = 75%

Coverage Carc Exam Coverage Ax Upst 43%

Ax Dnst 94%

CW 75%

CCW 75%

Total:

287%

Total / 4:

71.8/

Page 4 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category C-A - Code Item C1.10 Responses to Request for Additional Information Summary No.: 252350 Comp ID: SCHE-12-2 Page 1 of 3 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Channel Barrel-to-Flange / Close proximity of Flange transition to the weld limits attaining full coverage from the flange side of weld. The ultrasonic interrogation of the channel shell to flange weld could only be partially obtained from flange side due to the component configuration and close proximity of the weld to the flange transition. The nondestructive examination (NDE) techniques and procedures used incorporated similar examination techniques qualified under Appendix III of the ASME Section XI Code, as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality, used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 5 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category C-A - Code Item C1.10 CCNPP Component ID:

SCHE-12-2 NDE Report No.:

CC08-1U-005 LTP No.:

252350 Summary No.:

252350 Coverage Sketch No:

1 MO No.:

1200702218 Exam Area:

3600 (141.37")

Scale:

100%

Exam Angle / Direction:

450 Ax Upst (Sketch Resized for Relief Request)

Page 2 of 3 Diameter: 45" Thickness:

1.25" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow IM45° Axial Coverage from Upstream side = 33.3%

Page 6 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category C-A - Code Item C 1.10 CCNPP Component ID:

SCHE-12-2 NDE Report No.:

CC08-1U-005 LTP No.:

252350 Summary No.:

252350 Coverage Sketch No:

2 MO No.:

1200702218 Exam Area:

360' (141.37")

Scale:

100%

Exam Angle / Direction:

450 / 70* Ax Dnst (Sketch Resized for Relief Request)

Page 3 of 3 Diameter: 45" Thickness:

1.25" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow 7o0 Tubesheet 7 45' 4,

45 C

ChneCover 45' / 70° Axial Coverage from Downstream side = 85%

Coverage Calc Exam Coverage Ax Upst 33.3%

Ax Dnst 85%

CW 100%

CCW 100%

Total:

318.3%

Total / 4:

79.6%

Page 7 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category C-B -

Code Item C2.21 Responses to Request for Additional Information Summary No.: 252100 Comp ID: SCHE-11-NI Page 1 of 3 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Inlet Nozzle to Shell / Due to nozzle configuration coverage of the nozzle side base metal and weld was limited. The nozzle-to-shell weld is primarily accessible from the shell side based on the component configuration. The nozzle scanning surface is essentially perpendicular to the shell which prohibits the ultrasonic wave entering the Code required examination volume at an angle that will interrogate the weld volume for in-service flaws. The NDE techniques and procedures used incorporated similar examination techniques qualified under Appendix III of the ASME Section XI Code, as supplemented by Table 1-2000-1.

See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional, coverage plots and calculations.

Page 8 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category C-B -

Code Item C2.21 CCNPP Diameter:

10" Page 2 of 3 Component ID:

SCHE-11-Nl NDE Report No.:

2000BU010 Thickness:

1.125" LTP No.: 252100 SummaryNo.: 252100 Material:

S/S to CC/S Coverage Sketch No:

2 MO No.:

1199904472 CC/S = Clad Carbon Steel Exam Area:

360' Scale:

100%

S/S = Stainless Steel Exam Angle / Direction:

45* CW / CCW CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Nozzle Shell Exam Area: (1.75 x 0.4) 0,70 in2 Examined: (0.63 x 0.4) + (0.25 x 0.4) 0.35 in' 50%

]

45 /60* CW / CCW Coverage 50%

Coverage Calc Exam Coverage Ax Upst 0%

Ax Dnst 80%

CW 50%

CCW 50%

Total:

180%

Total / 4:

45%

Page 9 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category C-B - Code Item C2.21 CCNPP Component ID: SCHE-11-Nl NDE Report No.:

2000BU010 LTP No.:

252100 SummaryNo.:

252100 Coverage Sketch No:

1 MO No.:

1199904472 Exam Area:

360' Scale:

100%

Exam Angle / Direction:

45' / 600 Ax Dnst (Sketch Resized for Relief Request)

Page 3 of 3 Diameter:

10" Thickness:

1.125" Material:

S/S to CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow 60' 45*

Exam Area: (1.75 x 0.4) = 0.70 inW Examined: 0.70 - (0.7 x 0.4)/2 = 0.56 in2 = 80%

Im 450 / 60' Axial Coverage from Downstream side = 80%

450 / 70° Axial Coverage from Upstream side = 0%

Page 10 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category C-B - Code Item C2.21 Responses to Request for Additional Information Summary No.: 252450 Comp ID: SCHE-12-N2 Page 1 of 3 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Outlet Nozzle to Shell / Due to nozzle configuration coverage of the nozzle side base metal and weld was limited. The nozzle-to-shell weld is primarily accessible from the shell side based on the component configuration. The nozzle scanning surface is essentially perpendicular to the shell which prohibits the ultrasonic wave entering the Code required examination volume at an angle that will interrogate the weld volume for in-service flaws. The NDE techniques and procedures used incorporated similar examination techniques qualified under Appendix III of the ASME Section XI Code, as supplemented by Table 1-2000-1.

See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2. 1. 1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 11 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category C-B - Code Item C2.21 CCNPP Diameter:

10" Page 2 of 3 Component ID: SCHE-12-N2 NDEReportNo.:

CC08-1U-003" Thickness:

1.125" LTP No.: 252450 SummaryNo.:

252450 Material:

S/S to CC/S Coverage Sketch No:

1 MO No.: 1200702218 CC/S = Clad Carbon Steel Exam Area:

3600 (40")

Scale:

100%

S/S = Stainless Steel Exam Angle / Direction: 45' / 700 Ax Upst CASS Cast Stainless Steel (Sketch Resized for Relief Request)

SNozzle Flow

":::'::"""70*

45° Shell

/45' / 70' Axial Coverage from Upstream side = 100%

45° / 70° Axial Coverage from Downstream side = 0%

Page 12 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category C-B - Code Item C2.21 Page 3 of 3 CCNPP Diameter:

10" Component ID: SCHE-12-N2 NDE Report No.:

CC08-1U-003 Thickness:

1.125".

LTP No.: 252450 Summary No.:

252450 Material:

S/S to CC/S Coverage Sketch No:

2 MO No.:

1200702218 CC/S = Clad Carbon Steel Exam Area: 3600 (40")

Scale:

100%

S/S = Stainless Steel Exam Angle/ Direction:

45° CW / CCW CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Nozzle Flow Shell

]

45° CW CCW Coverage = 53.8%

Coverage Calc Exam Coverage Ax Upst 100%

Ax Dnst 0%

CW 53.8%

CCW 53.8%

Total:

207.6%

Total /4:

51 Page 13 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A - Code Item Ri.11 Responses to Request for Additional Information Summary No.: 417150 Comp ID: 12-SC-1215-18 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality.. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Pipe to Tee / Coverage limited by intrados of adjacent Tee-connection. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full -

coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90%

coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1. i c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 14 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A - Code Item Rl. 11 CCNPP Diameter:

12" Page 2 of 2 Component ID:

12-SC-1215-18 NDE Report No.:

CC08-1U-007 Thickness:

0.33" LTP No.: 417150 SummaryNo.:

417150 Material:

S/S Coverage Sketch No:

NA MO No.: 1200702220 CC/S = Clad Carbon Steel Exam Area:

Lower Scale: 100%

S/S = Stainless Steel Exam Angle:

700 CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Plpe Tee 26" of 38" Weld Length

?Ppe Tee @ Intrados 12" of 38" Weld Length Coverage Calc Exam Coverage Ax Upst 100%

Ax Dnst 68%

Circ Upst 100%

Circ Dnst 68%

Total:

336%

Total / 4:

84%

Page 15 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A - Code Item R1.20 Responses to Request for Additional Information Summary No.: 307150 Comp ID: 14-SI-1201-1 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2. 1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Valve to Elbow / Due to taper on valve body no coverage was attainable from valve side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examinati6n angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 16 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Code Category R-A -

Code Item R1.20 Components CCNPP Component ID:

14-SI-1201-1 NDE Report No.:

CC06-1U-009 LTP No.: 307150 SummaryNo.: 307150 Coverage Sketch No:

NA MO No.: 1200500727 Exam Area:

Lower Scale:

100%

Exam Angle:

450 / 700 (Sketch Resized for Relief Request)

Page 2 of 2 Diameter:

14" Thickness:

0.25" Material:

S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Valve Elbow Exam Coverage 50% as per single sided access rules.

Flow Valve EIbow Best effort exam on far side of weld - no coverage credit taken.

Page 17 of 36

- Relief Request ISI-25 for CCNPP Unit I Class 2 Components Code Category R-A -

Code Item R1.20 Responses to Request for Additional Information Summary No.: 310050 Comp ID: 12-SI-1214-3 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Pipe to Tee / No Code coverage was credited for scanning performed from Cast Stainless Steel Side of weld.

The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2..1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due 'to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 18 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A - Code Item R1.20 CCNPP' Diameter:

12" Page 2 of

'2 Component 1D:

12"-SI-1214-3 NDEReportNo.:

CC06-IU-005 Thickness:

0.28" LTP No.:

310050 SummaryNo.:

310050 Material:

S/S to CASS Coverage Sketch No:

NA MO No.: 1200500736 CC/S = Clad Carbon Steel Exam Area:

Lower Scale: 100%

S/S = Stainless Steel Exam Angle:

450 / 700 CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Pipe Tee Exam Coverage = 50% as per single sided access rules.

Pi Tee Best effort exam on far side of weld - no coverage credit taken.

Page 19 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A -

Code Item R1.20 Responses to Request for Additional Information Summary No.: 310200 Comp ID: 12-SI-1214-5 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions. (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Pipe to Tee / No Code coverage-was credited for scanning performed from Cast Stainless Steel Side of weld.

The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided' examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.. 1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 20 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A -

Code Item Ri.20 CCNPP Component ID: 12"-SI-1214-5 NDE Report No.:

CC06-1U-006 LTP No.:

310200 SummaryNo.:

310200 Coverage Sketch No:

NA MO No.:

1200500736 Exam Area:

Lower Scale:

100%

Exam Angle:

450 / 700 (Sketch Resized for Relief Request)

Page 2 of 2 Diameter:

12" Thickness:

0.28" Material:

S/S to CASS CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Tee Exam Coverage = 50% as per single sided access rules.

Tee Best effort exam on far side of weld - no coverage credit taken.

Page 21 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A - Code Item R1.20 Responses to Request for Additional Information Summary No.: 310650 Comp ID: 12-SI-1214-12 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Elbow to Valve / Due to taper on valve body no coverage was attainable from valve side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination

.resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under:

Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.,1. 1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative

-examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical U barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.r Page 22 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A - Code Item RI.20 Page 2 of 2 CCNPP Diameter:

12" Component ID:

12-SI-1214-12 NDEReportNo.:

20021BU002 Thickness:

0.25" 1 LTPNo.: 310650 SummaryNo.: 310650 Material:

S/S Coverage Sketch No:

NA MO No.: 1200100734 CC/S = Clad Carbon Steel Exam Area:

Lower Scale: 100%

S/S = Stainless Steel Exam Angle:

450 700 CASS = Cast Stainless Steel Flow Elbow.

Valve Exam Coverage 50%,as per single sided access rules.

Elbow Valve Best effort exam on far side of weld - no coverage credit taken.

Page 23 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A -

Code Item R1.20 Responses to Request for Additional Information Summary No.: 312250 Comp ID: 12-SI-1216-1 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Tee to Pipe / Coverage limited by close proximity of intrados of Tee. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90%

coverage of the required examination volume: The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical. due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 24 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A - Code Item R1.20 CCNPP Diameter:

12" Page 2 of2 Component ID:

12"-S1-1216-1 NDE Report No.: 2004BU003 Thickness:

0.25" LTP No.: 312250 SummaryNo.:

312250 Material:

S/S Coverage Sketch No:

NA MO No.:

1200300696 CC/S = Clad Carbon Steel Exam Area:

Lower Scale:

100%

S/S = Stainless Steel Exam Angle:

45' / 700 CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Tee Pipe 20" of 40" Weld Length Tee @ Intrados Pipe 20" of 40" Weld Length Coverage Calc Exam Coverage Ax Upst 50%

Ax Dnst 100%

Circ Upst 50%

Circ Dnst 100%

Total:

300%

Total / 4:

75%

Page 25 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A - Code Item R1.20 Responses to Request for Additional Information Summary No.: 336200 Comp ID: 4-SI-1206-7 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Valve to Pipe / Due to taper on valve body no coverage was attainable from valve side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical U

barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan 2

tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 26 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Code Category R-A - Code Item R1.20 Components CCNPP Component ID: 4-SI-1206-7 NDE Report No.:

96-UT-1-14 LTP No.: 336200 Summary No.:

336200 Coverage Sketch No:

NA MO No.:

1199502020 Exam Area:

Lower Scale:

100%

Exam Angle:

450 / 70*

(Sketch Resized for Relief Request)

Page 2 of 2 Diameter: 4" Thickness:

0.38" Material:

S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Valve

, L Exam Coverage = 50% as per single sided access rules.

Page 27 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A - Code Item R1.20 Responses to Request for Additional Information Summary No.: 338850 Comp ID: 4-SI-1209-1 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Branch to Elbow / Due to taper on Branch Connection (nozzle) no coverage was attainable from Branch side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 28 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A -

Code Item R1.20 CCNPPPage 2 of 2 CCNPP Diameter: 4" Component ID: 4-SI-1209-1 NDEReport No.:

2004BU00S Thickness:

0.38" LTP No.:

338850 Summary No.: 338850 Material:

S/S Coverage Sketch No:

NA MO No.: 1200300689 CC/S = Clad Carbon Steel Exam Area:

Lower Scale:

100%

S/S = Stainless Steel Exam Angle:

450 / 700 CASS Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Branch Con Elbow Exam Coverage = 50% as per single sided access rules.

Page 29 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A -

Code Item Ri.20 Responses to Request for Additional Information Summary No.: 416050 Comp ID: 12-SC-1213-1 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Valve to Tee / Due to taper on valve body no coverage was attainable from valve side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1. 1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT'examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical.!

barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 30 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A -

Code Item R1.20 CCNPP ComponentID:

12-SC-1213-1 NDEReportNo.:

CC08-1U-004 LTP No.:

416050 Summary No.:

416050 Coverage SketchNo:

NA MONo.:

1200702211 Exam Area:

Lower Scale:

100%

Exam Angle:

700 (Sketch Resized for Relief Request)

Page 2 of 2 Diameter:

10" Thickness:

0.33" Material:

S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Exam Coverage = 50% as per single sided access rules.

Flow Valve _

e Tee Best effort exam on far side of weld - no coverage credit taken.

Page 31 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A - Code Item R1.20 Responses to Request for Additional Information Summary No.: 417200 Comp ID: 10-SC-1214-1 Page 1 of 5 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Tee to Pipe / Integral attachments on pipe side of weld in close proximity to weld obstructed transducer. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 32 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Code Category R-A - Code Item Ri1.20 Components CCNPP Component ID:

10-SC-1214-1 NDEReportNo.:

2004BU012 LTP No.:

417200 SummaryNo.:

417200 Coverage Sketch No:

I MO No.:

1200300695 Exam Area:

Ax Upst Scale:

100%

Exam Angle:

450 / 700 (Sketch Resized for Relief Request)

Page 2 of 5 Diameter:

10" Thickness:

0.25" Material:

S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Te Tee

-I Pioe 2.75" 14.75" 19.75" 31.25" 344" fl Axial Exam Upstream = 63%

Calculation:

Upstream exam box = (0.85 x 0.20) =0.170 in'

Examined 0.155 in2 = 91%

91% (23.5" of 34" weld length) = 63%

Page 33 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A - Code Item R1.20 Page 3 of 5 CCNPP Diameter:

10" ComponentID:

10-SC-1214-1 NDEReportNo.:

2004BU012 Thickness:

0.25" LTPNo.: 417200 SummaryNo.:

417200 Material:

S/S Coverage Sketch No:

2 MO No.:

1200300695 CC/S = Clad Carbon Steel Exam Area:

Ax Dnst Scale: 100%

S/S = Stainless Steel Exam Angle:

450 / 70' CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Tee P-ne 5.15.

12.25' 22125" 28175 34'

[

Axial Exam Downstream = 46%

Calculation:

Upstream exam box = (0.85 x 0.09) = 0.077 in'

Examined 0.059 in' = 77%

77% (20.5" of 34" weld length) = 46%

Page 34 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Components Code Category R-A - Code Item R1.20 Page 4 of 5 CCNPP Diameter:

10" Component ID:

10-SC-1214-1 NDE Report No.:

2004BU012 Thickness:

0.25" LTP No.:

417200 Summary No.: 417200 Material:

S/S Coverage Sketch No; 3 MO No.:

1200300695 CC/S = Clad Carbon Steel Exam Area:

Circ Upst Scale:

100%

S/S = Stainless Steel Exam Angle:

450 CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Tee 34,,

Circ Exam Upstream = 26%

Calculation:

Upstream exam box = (0.85 x 0.20) = 0.170 in'

Examined 0.063 in' = 37%

37% (23.5" of 34" weld length) = 26*/o Page 35 of 36

- Relief Request ISI-25 for CCNPP Unit 1 Class 2 Code Category R-A - Code Item RI.20 Components CCNPP Component ID: 10-SC-1214-1 NDEReportNo.:

2004BU012 LTP No.:

417200 SummaryNo.:

417200 Coverage Sketch No:

4 MO No.:

1200300695 Exam Area:

Circ Dnst Scale:

100%

Exam Angle:

450 (Sketch Resized for Relief Request)

Page 5 of 5 Diameter:

10" Thickness:

0.25" Material:

S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Tee IIIIIIIIIIIIIIIIIIII IIIIIIIIIIIIIII11111 12 25" 22125" 28 175*

3 4' go Circ Exam Downstream = 18%

Calculation:

Upstream exam box = (0.85 x 0.09) = 0.077 in' Examined 0.023 in' = 30%

30% (20.5" of 34" weld length)= 18%

Coverage Calc Exam Coverage Ax Upst 63%

Ax Dnst 46%

Circ Upst,

26%

Circ Dnst 18%

Total:

153%

Total / 4:

38%

Page 36 of 36

ENCLOSURE 3 Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Calvert Cliffs Nuclear Power Plant, LLC December 16, 2010

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D -

Code Item B3.1 10 Responses to Request for Additional Information Summary No.: 103080 Comp ID: 4-404 Page 1 of 8 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

PZR Surge Nozzle to Lower Head / Due to nozzle configuration coverage of nozzle side base metal and weld was limited. The pressure nozzle-to-vessel head welds are accessible only from the head side based on the nozzle curvature. The scanning surface of the nozzle is essentially perpendicular to the head surface which prohibits the ultrasonic wave entering the Code required examination volume at an angle that will interrogate the weld volume for in-service flaws. The nondestructive examination (NDE) techniques and procedures used.

incorporated examination techniques qualified under Article 4 of Section V of the ASME Code as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

-Page 1 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class I Components Code Category B-D - Code Item B3.110 CCNPP Component ID: 4-404 NDEReportNo.:

2001BU012 LTP No.:

103080 SummaryNo.:

103080 Coverage Sketch No:

1 MO No.: 2200002409 Exam Area:

Weld Metal Scale:

50%

Exam Angle:

450 (Sketch Resized for Relief Request)

Page 2 of 8 Diameter: On Head Thickness:

4.4" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Nozzle I

i 45* T Coverage = 100%

.Coverage Dimensions Beam Directions Widnqt J

th j...

. Thihs~

0 h5 (C-ob.-j In.)

ward Nozzie:

ExmA1a,,65 4 6 1853 Aw~ayfrom Nozzle:4 Weld Metal:

65.5 155 4.6 467 ClockIs Bae etl46.6 4.6 1386 Counter Clockwise:l-Weld Metal: Volume a; 467.00!Cublc Inches Coi eraqte.IBeam Percent of Beam No.

Angle Sketch (Cub. In.)

Total 467.00 1

456t 1

100.00%

2 45°1 2

23.00%

3 60°.

3 100.00%

4 60°1 4

13.00%

5 45'-

5 100.00%

6 45*-

5 100.00%

7 60*-

5 100.00%

8 60'-

5 100.00%

9 0- WRV 5

100.00%

Total Beoms. 9 Total rc:

300%,ý

.Total" W.

"~.i "

!(. 1.7..

Base Metal: Volume=

1386.00 1Cubic Inches Coverage.

Beam Percent of Beam No.

Angl I Sketch (Cub. In.)

Totali...

6.d 1

45°'

6 71.00%

2 60°'

7 80.00%

3 450-8 50.00%

4 45*-

I 8

50.00%

5 60"-

8 50.00%

6 60'-

8 50.00%

7 0' WRV 6

50.00%

Total Beams:' 7 Total Percent:

401.00%

..7...............

Total Bnse metal Cooerage::15 07,.26-9.%

Coverage i ebbntT 7

Weld Metal:

81,78%

BasiieMali a

i 1..........

Volume 13866.00 Total

° u.........-.....

iii...

1653.0020 61%

8 42..

.5

...... Total Exam Coverage =

6346'/,................

=

-4 Page 2 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category B-D -

Code Item B3.110 1 Components CCNPP Component ID: 4-404 NDEReportNo.:

2001BU012 LTP No.:

103080 Summary No.:

103080 Coverage Sketch No:

2 MO No.: 2200002409 Exam Area:

Weld Metal Scale:

50%

Exam Angle:

450 (Sketch Resized for Relief Request)

Page 3 of 8 Diameter:

On Head Thickness:

4.4" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Shell E

45*, Coverage = 23%

Coverage Dimensions Beam Directions "e'n'g~th V~

WdtliTh T6~hickness:-

(Cb In.)

To Nqqze:j T E-amArea; 655 61 's 46 1853....

Away from Nozzle4I Weld Metal:-

685 1.55 4.6 467 Cloc lon:

Base Metal 6165 46 46 1366 Counter Clockwise:

Weld Metal: Volume 467.00'Cubic Inches I

Coverage Beam Percent of Beam No.

Angle Sketch (Cub. In).

Total.

I 1

4ST 1

100.00%

2 45-1 2

23.00%

3 60°T 3

100.00%

4 60"1 4

13.00%

5 45'-

5 100.00%

6 45*-

5 100.00%

7 60*-

5 100.00%

6 60"*

5 100.00%

6 0° WRV 6

100.00%

T.

oo.

.e r..

I......................... 6 1 Base Metal: Volume 1 1386.00Cubic Inches Conerage Beam Percent of Beam No.

Angle Sketch (Cub. In.)

Total 1386.00 1

45-T 6

71.00%

2 601t 7

80.00%

3 45-a6 50.00%.

4 45'-

8 50.00%

5 600-6 50.00%

6 60'-

8 50.00%

7 0 WRV 6

50.00%

Total l

7 Total Percent 401 00%

Total Base Metal Coveraga 57 29%,

I Combined Coverage Coveragel Total ercent a

Vo Vl umarne R

Wed Meta I 81.78%

14700 i

8 1653.00 2061%

.a*

i ii

.... 2

............. " ~

6........................

.... * £ 1 '.....

1£ ?.......

Base Metal 57.29%......1386600 1630 42.85%

Total Exam Coverage =

3 46 Page 3 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D -

Code Item B3.110 CCNPP Component ID: 4-404 NDE Report No.:

2001BU012 LTP No.: 103080 Summary No.:

103080 Coverage Sketch No: 3 MO No.:

2200002409 Exam Area:

Weld Metal Scale:

50%

Exam Angle:

600 (Sketch Resized for Relief Request)

Page 4 of 8 Diameter: On Head Thickness:

4.4" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Nozzle I

]

60* T Coverage = 100%

B ea D i e ti n t

ý oý-"

5: Tar:...... 15........... - : - "........ - -65 t "'

1; Nog ! '.....

2 *C f...... '.....

Mg jaj-6i i ]

5 :5 " "*............... '

4 6"746

" *.............. i........1 8 J i C lo c ik e.

Weld Metal: Volume =

467.00'Cubic Inches i

Coverge.Beam Percent at Beam No.

Angle Sketch ICub in.l Total.

47.00 1

45 1

100.00%

2 45 2

23.00%

4 60"1 4

13.00%

5 45*-

5 100.00%

6 45*-

5 100.00%

7 60*-

5 100.00%

8 60*-

5 100.00%

9 0" WRV 5

100.00%

Total.................

ToP*el

.... Total Weld Metal Coverage::

81.78%

Base Metal: Volume = i 1386.00 *Cubic Inches i

Coverage.Beam.

.Per o

Beam No.

Angle Sketch Cub. In.

Total 386.00 1

45-1 6

71.00%.

2 60"T 7

80.00%

3 45=-

8 50.00%

4 45°-

8 50.00%

5 60*-

8 50.00%

6 60"-

8 50.00%

7 0' WRV 8

50.00%

Total Beams 7

Total Percent 401.00%

Total Base Meltal Ca5era 5720%

t.omernea ~onoraae Coveraget 0ed ýta:

178%

Bane Meal:I..57.2..

"i

' ! volume i i i o....

467.00 Iota!

i Volume"

3.

"i 3 00

..ies~ito.*2.,

Result 20.61%

I toid Exam Coveaige e31.4e%-x Page 4 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D - Code Item B3.110 CCNPP

Component ID: 4-404' NDE Report No.:

2001BU012 LTP No.:

103080 SummaryNo.:

103080 Coverage Sketch No:

4 MO No.:

2200002409 Exam Area: Weld Metal Scale:

50%

Exam Angle:

600 Page 5 of 8 Diameter: On Head Thickness:

4.4" Material:. CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = CastrStainless Steel (Sketch Resized for Relief Request)

I I

Shell Nozzle

]

60' 4 Coverage= 13%

Coverage Dimensions 1

Beam Directions Result WLli' hickness (CbIn)

Toward Noziýq Exam Area'.65.5 6.15 4,6-"

1853 "iyrrliiej M

55 '

4........................*y' 9 l z : I.........

............. ~

~ g *

i 5 5 5

i i 4............

I..........................................

............ * * ~

il " 5 5 -................... :

i...............*.

- *.............. f........ 3 6 ' e,*4.6s i

13...........86...

Weld Metal: Volume =

467.001Cubic Inches I

Coverage.Bea m Percent of Beam No.

Angle Sketch (Cub. In.)

Total 467.00 1

45°t 1

100,00%

2 45-'

2 23.00%

3 60'T 3

100.00%

4 60'-

4 13.00%

5 45°-

5 100.00%

6 45-.

5 100.00%

7 60'-

5 100.00%

8 60'-

5 100.00%

9 0' WRV 5

100.00%

Total Beam.:

TO Tota**

l-i P'-ercentd:-'.76Wý'

Base Metal: Volume =:

1386.00iCubic Inches SCov.erage Beam Percentof.

Beam No.

Angle Sketch (Cb. In.)

Total 386.0 1

45'T 6

71.00%

2 60°T 7

80.00%

3 45'-

8 50.00%

4 450-8 50.00%61 5

60'-

8 50.00%

6 60'-

a 8 50.00%

7 0' WRV 6

50.00%

~~~............................

..'.......................1...............

Total Beams: 7 1Total Percent:'

401.00%

S4....

Total Base Metal Coverage:!

57.29%

4 7~I 71 Combined Coverage Coverage _

Total Percent" Volum6e""

Volu6m..

. Reult

-Weld Metal 81 78%

467.00 1853.00 20.61%.

Base Mal 0729%

13860 1 853.00 4285 a.6 Page 5 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category B-D -

Code Item B3.110 1 Components CCNPP ComponentlD:

4-404 NDEReportNo.:

2001BU012 LTP No.:

103080 SummaryNo.: 103080 Coverage Sketch No:

5 MO No.: 2200002409 Exam Area:

Weld Metal Scale:

50%

Exam Angle:

45'

/ 60* /0° WRV (Sketch Resized for Relief Request)

Page 6 of 8 Diameter: On Head Thickness:

4.4" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Nozzle Shell a

45*-

/ 60'- /0° WRV Coverage= 100%

peam Directions r

E-l (Cub. K.)- -Toward Nozzle: i 6.15 8 5 a 4:6

.1 457 CIoCkwIse;.j!7 VMd Mýtal-65.5 155 4.6 fý6- --

ý...

1386 ffounjaý j6 is aasý h4etaL 65ý5 4,6

&w a Weld Metal: Volume o 467.00 1Cubic Inches I

Coverage Beam Percent of Beam No.

Angle Sketch (Cub. In.)

Total 467.00 1

45't 1

100+00%

2 45-1 2

23.00%

3 60°T 3

100.00%

4 60°1 4

13.00%

5 45"-

5 100.00%

6 45*-

5 100.00%

7 60'-

5 100.00%

a 60'-

5 100.00%

9 0° WRV 5

100.00%

Total Beams: 9 Total Percent:'

736.00%

T

.tal.Weld..e.a.. Covera.e...61%*

76.%...

!Total WeldMetal Coverage: ý 81.78%

Base Metal: Volume -1 1386.00iCubic Inches

,Coverage Beam Percent oa Beam No.

Angle Sketch (Cub. In.)

Total 1386.00 1

45°T 6

71.00%

2 60oT 7

80.00%

3 45'-

8 50.00%

4 45*.

8 50.00%

5 60*-

8 50.00%

6 60*-

a 50.00%

7 0" WRV 6

00.00%

.:.1.L......

Total Base..

Total Percent:

401.00%

ietal C

Combined Covera*e Coverage.

Total Percen X

V.

Vt&ie Votome'

.Result Weld Metal 81 76%...........

467.0 1

0 20.61%

BaeMtt5726 13866.00 16304.%

i............... B

M~

................r 3..0 i................ !

-8 o.........................

Total Exam Coverae 46%.

Page 6 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category B-D - Code Item B3.110 I Components CCNPP Component ID: 4-404 NDE Report No.:

2001BU012 LTP No.:

103080 SummaryNo.:

103080 Coverage Sketch No:

6 MO No.: 2200002409 Exam Area:

Base Metal Scale: 50%

Exam Angle: 450

/600 (Sketch Resized for Relief Request)

Pagek7 of 8 Diameter: On Head Thickness:

4.4" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Nozzle j9 Coverage by45° T = 71%

M Coverage by 60* T = 80%

Coverage Dimensions Beam Directions Exam Area..

65.5

. 6.15 h...

BaeMtl:6.5:5 4.6 14.6

.1366 Counter Clockwise:

Weld Metal: Volume.

467.00lCublc Inches

.. ICoverage Beam Percent of Beam No.

Angle Sketch (Cub.tn.)

Total 467.00.

1 45"T 1

100.00%

2 45°J 2

23.00%

3 60"T 3

1 I

00.00%

.4 6o0 4

13.00%

5 45*-

5 100.00%

6 45-.

5 100.00%

7 60*-

5 100.00%

§ 60 5

100.00%

" 9 WRV 5

100.00%

Total Beams: 9 Total Percent:r736.0001o

.Total Weld Metal Covmera0 61.76%ý Base Metal: Volume = i 1386.00 Cubic Inches Coverage Beam Percent of Beam No.

Angle Sketch (Cub. In.)

Total.

1366.00 1

45' 6

71.00%

2 60-T 7

600.00%

3 45*-

8 50.00%

4 45 8

50.00%

5 60*-

8 50.00%

6 60*-

8 50.00%

7 0I WRV 6

50.00%

i....................

ToalBems7 Total Per.ent.

401 00%.

Totla Base Metal Coverae 07,29%1 Eu Combined Coverage Coverage J

Total i L

rcont..

.Vol6m eldlMetalý 61676%0 1603.00206 Base Metat 70i 360:

830 25

" *..........V * * < '° 6 f *

~

i f T'

T...

feTtal Exam Coverage =L 63.46%.

Page 7 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class I Components Code Category B-D - Code Item B3.110 CCNPP Component ID: 4-404 NDE Report No.:

2001BU012 LTP No.:

103080 Summary No.:

103080 Coverage Sketch No:

7 MO No.:

2200002409 Exam Area:

Base Metal Scale:

50%

Exam Angle:

45* / 600

/ 0* WRV (Sketch Resized for Relief Request)

Page 8 of 8:

Diameter: On Head Thickness:

4.4" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Shell

((a 45*- / 60"*-

0* WRV Coverage= 50%

C v r eD men-sions...

eam....

Directio n........

Exam Area:!

65.5 4 -6' i

5 Yfo.v Wed"I.F 6.*15 48 467 Clockwise:,

se Metal: i.5e54s 4.6 1386 Counter Clockwise:,-

Weld Metal: Volume =i 467.00 Cubic Inches I

qof*.,'age.....Beam Percent of Beam No.

AnleI Sketch (Cub. In.)

Total 467.00 1

45*'

1 100.00%

2 45"1 2

23.00%

3 60-T 3

100.00%

4 60°1 4

13.00%

5 45*-

5 100.00%

6 45*-

5 100.00%

7 60'-

5 100.00%

8 60'-

5 100.00%

9 0' WRY 5

100.00%

lotal Beams 9

Total Percent: *"73600 Total Weld Metal Coverase:i 81.78%

Base Metal: Volume =i 1386.00 Cubic Inches I

iCoverage Beam Percent of Beam No.

Angle Sketch (Cub. Isn.

Total 1386.00 1

45°1 6

71.00%

2 60°T 7

80.00%

3 45°-

8 50.00%

4 45°.

8 50.00%

5 60*-

8 50.00%

6 60*-

8 50.00%

7 0° WRV 8

50.00%

Total Bea~ms 7 r'

Total Percent 401.00%

Total Base Metal Coverage 57026%

Ceminead Covera-e 1.0088 Percent x

Weld Metall 81.78

.Basea Meatal: 5 Volume

-?61664e ResulCl 46700 1830 281 138800 18530 42.85%

Total BExam Cone aqZ _16 Page 8 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D - Code Item B3.1 10 Responses to Request for Additional Information Summary No.: 103090 Comp ID: 4-405 Page 1 of 8 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

PZR Spray Nozzle to Upper Head / Due to nozzle configuration coverage of nozzle side base metal and weld was limited. The pressure nozzle-to-vessel head welds are accessible only from the head side based on the nozzle curvature. The scanning surface of the nozzle is essentially perpendicular to the head surface which prohibits the ultrasonic wave entering the Code required examination volume at an angle that will interrogate the weld volume for in-service flaws. The nondestructive examination (NDE) techniques and procedures used incorporated examination techniques qualified under Article 4 of Section V of the ASME Code as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 9 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D - Code Item B3.110 CCNPP Component ID: 4-405 NDE Report No.: 2001BU020 LTP No.:

103090 SummaryNo.:

103090 Coverage Sketch No:

1 MO No.: 2200002409 Exam Area:

Weld Metal 360' Scale:

50%

Exam Angle:

45' (Sketch Resized for Relief Request)

Page 2 of 8 Diameter: On Head Thickness:

4.4" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel CL i

[ 45"T Coverage = 380 ins of 380 ins exam area =100%

Coverage DimensionsBeamDrcin Weld Metal: Volume 380.OOiCubic Inches S

I overage.BeaTm......Percenl of Beam No.

Anqle Sketch (Cub. In.)

Total 380.00 1

45-i 380.00 380000 100.00%

2 45°j 2

65.50 65.50 17.24%

3 60em 3

380.00 380.00 100.00%

4 60em 4

39.50 39.50 10.39%

5 45'-

5 380.00 380.00 100.00%

6 45*-

5 380.00 360.00 100.00%

7 60*-

5 380.500 38000 100.00%

e 8 -

5 3000 300.00 100.00%

e 0 WRV 5

380.00 380.00 100.00%

I I

.Total Weld Metal CovePe

7 8

Base Metal: Volume =t 1054,OOiCubic Inches Coverage

,Beam Percent of Beam No.

Angle Sketch (Cub. In.)

Total 1054.00 90014%

1.2 45*/600tj 6

950.10 950.10 3

450-7 625.01 025.01 09.30%

4 45*-

7 625.01 625.01 59.30%

5 60*-

7 025.01 625.01 59.30%

6 60*0 7

6.01 625.01 59.30%

7 0" WRV 7

625.01 625.01 59.30%

...............................t.....................................

Total:Oeamu 7

Total Percent:

476.70%

Total Base Metal Covers 0+

22 2........

Combined Coverage Coverage a

Total -

-1 6"i e

n' x

Vo lume'

+

V*.............

LVol.ume Resu-*i Weld Metal 05%

830000 143400 21.42%

Base Metal 668 ;lQ/i1 054 143400 5006%

t Total Exam Coverage =

71.49%

Page 10 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D - Code Item B3.110 CCNPP Component ID: 4-405 NDE Report No.:

2001BU020 LTP No.: 103090 SummaryNo.:

103090 Coverage Sketch No:

2 MO No.:

2200002409 Exam Area: Weld Metal 3600 Scale: 50%

Exam Angle:

450 (Sketch Resized for Relief Request)

Page 3 of 8 Diameter:

On Head Thickness:

4.4" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel 45*1 Coverage = 65.5 in3 of 380 in3 exam area = 17.24%

Coverage Dimensions Beam Directions

........ T c

1~

eaa 6a'n57"r x

Width x

rhlcknasa R'

cib d.V"

.sagA 458 1 i43400 Away from Nozzle..

Weld Merta 57 1.55, 4.3 80.U0 clockwise: -

ease Metal, 57

.4.3 4:3 1004.0 counter Clockwise:

Weld Metal: Volume =1 380.O0,Cublc Inches Coverage Beam Percentof Beam No.

Angle Sketch (Cub. In.

Tot*a.i 1

45-T 1

380.00 380.o0 100.00%

2 45"1 2

65.50 85.50 t7.24%

3 I60-3 380.00 380.00 100.00%

4 60-1 4

39.50 39.50 i10.39%

' -- 5 45.-

5 380.00 380.00 100.00%

6 450ý 5

380.00 380.00 100.00%

7 60'.-

8 380.00 380.00 100.00%

8 60*-

5 I 380.00 380.00 1100.00 9

OWRVy 5

38000 380.00 100.00

[........

8 : * *..

Total Beams _9 Total Peren' rý 72783%ý6 L

total Weld Metal Coverag 1380.85%

Co~ae Beam Pecnt of Beam No.

An 1e Skech Cubrt.

Tl 1054.00.

1 +2 145"160"f 6

950.10 950.10 3

1 45'-

1 7

625.01 1 625.01 1 59.30%

4 45*-

7 625.01 825.01 58.30%

5 U0"-

7 g25.01 625.01 09.30%

6 60°-

7 625.01 825.01 59.30%

7 0° WRV 7

625.01 625.01 59.30%

.7

.Tota Beams 7

Total Percent:

476 78%/o Total Base Metal Coverage:

68.11%

Combined Coveraae Coverage Total Volume Volume-_

dt ia a ii 0 5 ¢ i " 8 : 0............

.[ i 3a o

R e.................

lt4/2;..

Weld Metal': 805180 1434.00

2 2

Metal'. 8811 f

0 154 00

.... ""I Total Exam C overag e =1 71.49%

"............... *.......t -:- -

......1 Page 11 of.54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category B-D - Code Item B3.110 1 Components CCNPP Component ID: 4-405 NDEReportNo,: 2001BU020 LTP No.:

103090 Summary No.: 103090 Coverage Sketch No:

3 MO No.: 2200002409 Exam Area: Weld Metal 360' Scale: 50%

Exam Angle:

600 (Sketch Resized for Relief Request)

Page 4 of 8 Diameter: On Head Thickness:

4.4" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel NozzleI 60T Coverage = 380 In of 380 n exam area = 100%

Coverage Dimersions Beam Directions en....t

.A....

.r.m

.N

.BaeMetai I..

41 3105.00 ConeCocrse-Weld Metal: Volume 380.006Cubic Inches Coverage er.a Percent of Beam No.

An le Sketch (Cub. In.)

Total 380.00 1

45"T 1

380.00 380.00 100.00%

2 45°1 2

65.50 65.50 17,24%

3 60°1 3

380.00 380.00 100.00%

4 60" 4

39.50 39.50 10.39%

5 45'-

5 360.00 380.00 100.00%

6 45*-

5 380.00 380.00 100.00%

7 60*-

5 30.00 360.00 100.00%

8 60*-

5 360.00 360.00 100.00%

9 0 WRV 5

380.00 380.00 100O00%

illil ii i~

lii illllll] i~ *............................

Total Beams: 6 Total Percent:

6-727.963%

M..............

i l Coverage-80.85%.......

.....85 Base Metal: Volume =

1054.00'Cublc Inches

.6oe aef

.eam Percent of Beam No.

Angto Sketch I b., In.)

Tota 10 i0o4:.

12 45'/60f1 6

950.10 90010 90.14%

,_6510 951 90.14%

3 450-7 625.01 625.01 59.30%

4 45'-

7 625.01 625.01 59 30%9/

5 60°-

7 625.01 625.01 06.30%

6 60"-

7 625.01 625.01 59.30%

7 0° WRV 7

625.01 625.01 I 59.30%

Total Beams: 7 Total Percent:

476.78%

.Total...........

ea..e Met...

al Covnr 1%

Combined Coverage Coverage Total Percent x.Vol

.um.

Volume a.

.e...t.

.111,1.Wela d Me.a.t

.al 6065 3X 1600 1434 00 I21 42%,

Base Mesltald 61 1%

104Ct 143400 006 Total Ecom C.ver...a 6e l 71.49%

Page 12 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category B-D -

Code Item B3.110 1 Components CCNPP Component ID: 4-405 NDEReportNo.:

2001BU020 LTP No.:

103090 SummaryNo.:

103090 Coverage Sketch No:

4 MO No.:

2200002409 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

60' (Sketch Resized for Relief Request)

Page 5 of 8 Diameter: On Head Thickness:

4.4" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel I

I Nozzle Shell"

[

60°, Coverage = 39.5 inW of 380 inW exam area = 10.39%

Coverage DImens~ons Beam Directions Legt --

WifK--

Thic~knegs (iCuJb l')

fwa~r-dNozzlelt ExmAe: 57 41Sa 1434.00 Away from.Nozzle.

.eld Metal..

57 1.55 43 380.00 Cl.. N le:

ease Mestal:

57 4.3 4:3 10:54.0 Counier Clxx wse:-

Weld Metal: Volume =

380.0O;Cubic Inches I

Coverage Beam Percent of Beam No.

Angle Sketch (Cub. In.)

Total 380.00 1

45°'

1 380.00 380.00 100.00%

2 45°1 2

65.50 65.50 17.24%

3 60- t 3

380.00 380.00 100.00%

4 60°1 4

39.50 38.50 10.38%

5 45'-

5 380.00 380.00 100.00%

6 45*-

5 380.00

-380.00 100.00%

7 60'-

5 380.00 380.00 100.00%

8 60.-

5 380.00 380.00 100.00%

9 0 WRV 5

380.00 380.00 100.00%i Base Metal: Volume e{

1054.00{Cublc Inches I

Coverage.Beam Percent xo Beam No.

Anxle Sketch CCub. in.)

Total 1054.00 90.14%

1 -2 45"160*t1 6

850.10 850.10 3

45*-

7 628.01 625.01 59.30%

4 45'-

7 828.01 625.01 59.30%

5 60°-*

7 625.01 625.01 59.30%

6 60*-

7 625.01 625.01 59.30%

7 0' WRV 7

625.01 625.01 59.30% 7~1

.. i Total Beams: 8 Total Percant:.7278:3%

.T...otal

............ W M

l C.........

Ce:

8.85%

al.........................

Total Beams ;7 otal Percent:i 4776.7%'

Totl.Ba.............

a Combined Coverage i

Coverage a.

Totali S

,e rcent o

"V m Volame.

Result Weld Metal 80835%X 38000 2

13021

.4 2%

Bae"Metalý 86 11%'

1054006 143400 5008%l~

Total Exam Coverage n~71.49%

i.....................

Page 13 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class I Components Code Category B-D -

Code Item B3.110 CCNPP Component ID: 4-405 NDE Report No.: 2001BU020 LTP No.:

103090 Summary No.: 103090 Coverage Sketch No:

5 MO No.: 2200002409 Exam Area: Weld Metal 3600 Scale: 50%

Exam Angle:

450 / 600 / 0°WRV (Sketch Resized for Relief Request)

Page 6 of 8 Diameter: On Head Thickness:

4.4" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel 45'- / 60*-

/ 0° WRV.Coverage = 380 in' of 380 in' exam area = 100%

Coverage Dimensions Beam Directlons E. am AreF.......... "57" e

5...

43" 14 1... 3400 Aw

.w ay from Nozze:

.td./

M taiý

[...

F-1-. 1 1.,5-4.3 38o000oe oe ease Metal:

57

~

4.3 4.3.......1054.060.

6ja ~cw Weld Metal: Volume =i 380.00 Cublc Inches I

Coverage.Beamt Percent of Beam No.

Anxle Sketch (Cub. In.)

total 380.00 1

45" 1

1 380.00 380.00 100.00%

2 45-1 2

65.50 65.50 17.24%

3 60°t 3

380.00 380.00 100.00%

4 60°1 4

39.50 39.50 10.39%

5 45°-

5 380.00 380.00 100.00%

6 45'-

5 380.00 380.00 100.00%

7 60°-

5 380.00 380.00 100.00%

8 60'-

5 38000 380.00 100.00%

9 0° WRV 5

380.00 380.00 100.00%

Total..

.B..s...:...

4..

....... *........................................*..............[............

Base Metal: Volume z 1054.00fCublc Inches Beam No Axge Is ke.tcBe.a.m Percent of Beam No.

Angle ISketch (Cub. In.)

Tota.

1054.00 1 +2 45"160"14 6

950.10 950.10 80.14%

90.14%

3 45*-

7 625.01 625.01 59,30%

4 4560 7

625.01 625.01 59.30%

5 60'-

7 62N.01 625.01 59.30%

6 60*-

7 6 295.11 625,01 59,30%

7 0° WRV 7

625.01 625.01 59.30%

I T9 otalPercent:

727.63%

Total Beams 7 Total Tota W el M et l C o erag :*

8.85%......................

..................................... o...a......'C 1

i total Weld mei mm-Total Baie MetalC Combined Coverage q.Cov!er Total Percent n

Volue Vlme

=

-B1it

...............W ~

a

i~ i i 0: Y; 'i....................

J6.....

b p Weld Metl t

8065%

380.00

.i........

143400 21.42%

Base Mletal-68.1 105400 1434.00 50.. 0 i "T.

otal Exam Coveraoe=

71.49%.

Percext 476 78%

ra

66.

1.1 Page 14 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category B-D - Code Item B3110 1 Components CCNPP Component ID: 4-405 NDE Report No.: 2001BU020 LTP No.:

103090 Summary No.: 103090 Coverage Sketch No:

6 MO No.: 2200002409 Exam Area:

Base Metal 3600 Scale:

50%

Exam Angle:

450

/ 600 (Sketch Resized for Relief Request)

Page 7 of 8 Diameter: On Head*

Thickness:

4.4" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Coverage by at least 2 sound beams = 922.26 in 0 of 1054 in3 exam area = 87.50%.

Coverage by 1 sound beam only u 55.68 in 0 of 1054 in 0 exam area = 5,28%.

Total: 922.26 + (55.68 12) = 95010in of 1054 in3 exam area = 90.14%.

seam ~,~recrions S

i Ce-n-gtK Exa. m Area:'

'57.

Weid metla:.57.

mWase Moe 57.

oereUlenslons, 1 55 4,

43 4.3

'1434'+00 Aw-from Nuzle: ~

S380 06 Clo ckwvise I 105s1:0.fne~ocsie)

Coverage Beam Percent of Beam No. I Angle Sketch (Cub. In.6 Total 380.00 Goverage beam 1 Percent of Beam No.I Annle cSketch (Cb. 1.1 Total I 1054.00 1 + 2 145'/600TJ, 6

950.0 950.10 uu,14 90.14%

3 41,°-

7 959 01 625.01 I 59.30%

4___ 1 I 7 1...t5Iof 1 62.115.0 Total Beams,7 Tc al Percent:

-Tota xm To W etal PCveraceit 8703 5%

Total Weld Metal Coverage:"

80.85%

4M6.78%

beverage:I Combined Cove Coverge Percent B..........

-ase etal:

68.11%, 1 V-Volume 1054.00 Total E

,*.-.o.. -i V f; --...

if a ii o --

71,4 6X

-. 't Page 15 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D -

Code Item B3.1 10 CCNPP Component ID:

4-405 NDEReportNo.:

2001BU020 LTP No.:

103090 SummaryNo.:

103090 Coverage Sketch No:

7 MO No.: 2200002409 Exam Area:

Base Metal 3600 Scale: 50%

Exam Angle:

450 / 60o / 00 WRV (Sketch Resized for Relief Request)

Page 8 of 8 Diameter: On Head Thickness:

4.4" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Mi 45"*l / 60"- 1 0' WRV Coverage = 625.01 inW of 1054 inW exam area = 59.30%

Coverage Dimensions Beam Directions S....

sesr Ala.

5743.o A5a from iýW,~~.. I-on......N Z.~

. 1,1 571-5 3

8:0C ease Metal) 57 43 4.3 Weld Metal: Volume a 380.00iCubic Inches Bearn No.

Angle Sketch (Cub: In.)

Tota 380.00 45"-t 1

380,00 380.00 100.00%

P i Coea eý eam Percent of 2

45°l 2

65.50 65.50 17.24%

3 60°T 3

380.00 380.00 100.00%

.4 60° 4

39.50 39.50 10.39%

5 45'-

5 380,00 380,00 100,00%

6 45*-

5 380.o0 380q00 100.00%

7 60*-

5 380.00 380.00 100.00%

9 "WRV 5

38.0 30.0 0000 Total Beams: 9.

Total Percent:r727.63%

a W el M alCo.eta e:. o0.

1040 ounter ClýOcknwise:

i-Base Metal: Volume i 1054.00!Cubic Inches Coverage Beam Percent of Beam No.

Angle ISketch (Cob. In.1 Total.1054.00.

1 2 45*160 11 6

950.t0 950.10 90.14%

1

+

4

° 190.14%

3 45"-

7 625.01.

625.01 59.30%

4 45°-

7 625.01 625.01 59.30%

.5 60*

7 625,01 625.01 59.30%

6 60*-

7 625.01 625.01 5930%

7 0 WRV 7

625.01 625.01 59.30%

................!.........i.............................

....... i.........

l...............

,/0 Total Beams: 7 Total Percent: 1476.78%

Total Base Metal coverage: i68.11%

"Ill.',j 7-covefagej Total V

rercent

ýlume i.......................

wefý Kiýýal 80 Eý%

1434.00 1 i

i Page 16 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D - Code Item B3.1 10 Responses to Request for Additional Information Summary No.: 103100 Comp ID: 16-405A Page 1 of 9 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) toprovide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Safety & Relief "A" Nozzle to Upper Head / Due to nozzle configuration coverage of nozzle side base metal and weld was limited. The nozzle enters the vessel at an angle thereby also limiting coverage attainable from the vessel side of the weld. The pressure nozzle-to-vessel head welds are accessible only from the head side based on the nozzle curvature. The scanning surface of the nozzle is essentially perpendicular to the head surface which prohibits the ultrasonic wave entering the Code required examination volume at an angle that will interrogate the weld volume for in-service flaws. The nondestructive examination (NDE) techniques and procedures used incorporated examination techniques qualified under Article 4 of Section V of the ASME Code as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component

.thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access Tor placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.,

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 17 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D - Code Item B3.110 CCNPP Component ID:

16-405A NDEReportNo.:

2003BU041 LTPNo.:

103100 SummaryNo.: 103100 Coverage Sketch No:

1 MO No.:

2200201399 Exam Area:

Weld Metal 3600 Scale: 50%

Exam Angle:

450 (Sketch Resized for Relief Request)

Page 2 of 9 Diameter: 96" Thickness:

5.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel

[ 45=T Coverage = 4.25 in' of 4.59 in' area =92.59%

23.

Cov rag Dim ensions

.26.

8 Beamo Die to...........

W..........

,q i~ 'eld M

2 3 S ee.........

S k......et...............

ch':t........................

i 9.............

4i i

i**.59c o

s

ý

'Ba..........

se M eta l:]

" 23 -

see...........

4: " 'i...........

S kee k tchl.............. 1...... 2Z:26 1 C ounfeaý 1ck isel *...........

Weld Metal; Volumes=

4.59 1Square Inches Coverage.

Beam P....ercertof Beam No.

Anle Sketch (Squ. In.)

Total 4,59 1

45°1 1

4.25 4.25 92.59%

2 45-.

2 0.00 0.00 0.00%

3 60-T 3

4.O6 4.09 88.45%

4 60-1 4

0.00 0.00 0.00%

5 45'-

5 1.38 1.38 30.07%

6 45*-

5 1.38 1.38 30.07%

7 60-5 1.39 1.38 30.07%

8 603*

5 1.39 1.38 30.07%

0 WRV 5

1.38 1.35 30.07%

Total Beams 9

eld Total Percent:331.37%

.................. *..................i........

... o...

era.....

a.... 3 9. 9 2%.......

Base Metal: Volume 1

22.26 ISquare Inches Coerq Beam Percent of Beam No.

Anle Sketch Squ. In.

Total 22.26 1 - 2 45 °/60-11 6

18.09 18.08 81.22%

81.22%

3 45*-

7 10.53 10.53 47.30%

4 45"-.

7 10.53 10.53 47.30%

5 60'-

7 10.53 10.53 47.30%

6 60*-

7 10.53 10.53 47.30%

7 0° WRV 7

10.53 10.53 47.30%

...i Total Beams, 7 Total Percent:

398.97%

Total Base Metal Coverage:

57.00%

jj.I..j.....

t..............

i~

!!I.......................i..............

Combined Coverage iCovrc Total

~

'~

l C ~ !a e

_ J o L...............

L j

Weld Matý ta 392%1X49 26.95 9.2,9%

TPa.....

l...

oe

=

......................* ia e ia i i 3 :8 2 i........................ f.5

..*' * *:- 5 '0............

t iI Total Exam Coverage =

3.55%

I......

Page 18 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D -

Code Item B3.110 CCNPP Component ID:

16-405A NDEReportNo.:

2003BU041 LTP No.:

103100 SummaryNo.: 103100 Coverage Sketch No:

2 MO No.: 2200201399 Exam Area: Weld Metal 360' Scale: 50%

Exam Angle:

45*

(Sketch Resized for Relief Request)

Page 3 of 9 Diameter: 96" Thickness:

5.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel El 45%) Coverage = 0 in' of 4.59 in' area = 0%

Coverage lmeislos 1

Beam Directions Exam Area 2 3l.

Ske TchE.

26. 85 Weld IMetal 23e SW" ketch.

5".0 clockwise:'-

eaeMetal:

l 23 4.854 Sketch' 22.261 Counter Cleck se::--

Weld Metal: Volume =i 4.59 Square Inches Coverage....Beam Pe.rcentof Beam No.

Antle Sketch (Squ. Int)

Total 4.59 1

45'1 1

4,25 4.25 92,59%

2 45'1 2

0.00 0.00 0.00%

3 601 3

4.06 4.06 88,45%

4 60' 4

0.eo 0.00 0600%

5 45'-

5 1.38 1.38 30.07%

6 45*-

5 1.38 1.38 30.07%

7 60*-

5 1.38 1.38 30.07%

8 80°-

5 1:38 1.38 30.07%

9

0. WRV 5

1.38 1.38 30.07%

% '~'

E *.....................

.*i~

...~~'i'

. 3.3......

Total. B a s... '..

Total Percn:

3 ITotai W.ad Metal Conea a) 306i.82%

Base Metal: Volume =1 22.26 Square Inches Coverage Beam Percent of Beam No.

Angle Sketch (Squ. In.

Totea 22.2.

1 + 2 45'/60'-1 6

18.08 18.08 81.22%

81.22%

3 45"-

7 10.53 10.53 47.30%

4.

45*-

7 10.53 10.53 47.30%

5 60"-

7 10.53 10.53 47.30%

6 60'-

7 10.53 10.53 47.30%

7 0' WRV 7

10.53 10.53 47.30%

Total Beams 7 -

Total Perceet:

398.97%

Total aa meil i:~ra. 57.00%

I Combined Coverage Coverage Volume Total:

M l 3

.................... 2. 8 :

Dose 3

Metal................82%

.. 28 2M.85 629%

570,%

.,...o./

Ttal Beam Cner o

53.s8 0/

Page 19 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D - Code Item B3.110 CCNPP Component ID:

16-405A NDE Report No.: 2003BU041 LTPNo.:

103100 SummaryNo.:

103100 Coverage Sketch No:

3 MO No.:

2200201399 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

600 (Sketch Resized for Relief Request)

Page 4 of 9 Diameter: 96" Thickness:

5.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Note: At 180t the 60'T exam was limited by the head to shell transition.

19 60°T Coverage @ 180° quadrant, Wmax limited by head to shell transition. = 3.23 in' Coverage in remaining 3 quadrants = 4.34 in2 Average = (3.23 + 4.34 + 4.34 + 4.34) / 4 = 4.06 in' 4.06 in' of 4.59 in 0 exam area = 88.45%

Coverage Dimensions Beam Directions Result

}*

~

Length o

Width x

TKIcltness

=

(Sqo. in T

ard Nozzle:i Eom~e~23s it5ws

ý 85 ~ilifoze4

23. M " "

2 " '.-......

22.2.

8.1.

i sei -................

.S.

t 2...

terC lo.

e as 23ete Weld Metal: Volume 4.59, Square Inches Cerage Beam Percent of Beam No.

An le Sketch (Squ, In.)

Total 4.59 1

45° 1 _

4.25 4.25 92.59%

2 45" 2

0.00 0.00 0,00%

3 60 3

4.06 4.06 88.45%

4 60° 4

0.00 0.00 0.00%

.5 45*-

5 1.38 t 1.38 30.07%

6 45**

1.38 1.38 30.07%

7 60'-

5 1.38 1.38 30.07%

.8 60'-

5 1.38 1.38 30.07%

WRy 5

1.38 1.38 30.07%

'.'5 ".7." "7

'.'..."'.i Total e..s....Total Percent w

33j.c7%**37%

I Totld Weld Metal Coveraga: 36.82%

Base Metal: Volume 22.26 iSquare Inches mCovera.g.*

.rn cent.of eeam No.

Angle Sketch (Squ. In.)

Total 22.26 1.2 45"160°f$

6 1808 18.0 81.22%

3 45*-

7 10.53 10.53 47.30%

4 45"-

7 10.53 10.53 47.30%

s 60"=

7 10.53 10.53 47.30%

6 600-7 10.53 10.53 47.30%

7 0 WRV 7

1053 10.53 47.30%

a......

Total BeP 7

Total Percenit 3986.97%

Total ease Motel Coverag 0 7.00%

i Combined Coverage S 1 Coverage I Total Pe-rcent ox oum t-oum t-Rtiit' Weld Metal 36.82% I 4.59 1 26.80 829%

ease Metal 5 S7q06.00 22 26 1 2.647.25i

~

o.I............... " *:

!................r : 5.............

2............

Total Exam Covera.e....3.5..

Page 20 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category B-D -

Code Item B3.110 1 Components CCNPP Component ID:

16-405A NDEReportNo.:

2003BU041 LTPNo.:

103100 SummaryNo.:

103100 Coverage Sketch No:

4 MO No.: 2200201399 Exam Area:

Weld Metal 360*

Scale:

50%

Exam Angle:

600 (Sketch Resized for Relief Request)

Page 5 of 9 Diameter:

96" Thickness:

5.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel N

6001 Coverage = 0 in2 of 4.59 in2 area = 0%

Coverage Dimensions Beam Directions a...se et 3..........

2 iii 23.................... T.......i....................$efSkffiWifi.................

co........

unte................

ClckiseA*...................................................

.co ge.,,e.Beam Percent of Beam No.

Angle Sketch Squ. In.e Total 4.5.

1 45"T 1

4.25 4.25 92.59%

2 45* 1 2

0.00 0.00 0.00%

3 60' 3

4.06 4.06 88.45%

4 60° 4

0.00 0.00 0.00%

45"-

5 1.35 1.38 30.07%

6 45J -

5 1.38 1.38 30.07%

7 60*-

5 1.38 1.38 30.07%

Base Metal: Volume =

22.26 Square Inches Iya

......Beam Percento!.

Beam No.

Angle Sketch (Squ. In.)

Total 22.26 1 12 45'/60-Ti 6

16.05 16.05 61.22%

81.m22%

3 45*-

7 10.53 10.53 47.30%

4 45-7 7

10.53 10.53 47.30%

5 60'-

7 10.53 10.53 47.30%

6 60*-

7 10.53 10.53 47,30%

7 0* WRV 7

10.53 10.53 47.30%

j77......7

.1.. :.........

Ttal BeamsO 7 I

Total Percent:

396.97%9/

Total Base Metal Coverage:

57,00%

boo-8 1.38 13M nU.U17.

9 0° WRY 5

1,35 1.35 30.07%

To ta s

t r,

Tota l

a "r"en 331I37o T otai Weld Metai Cone~rage 3652 Combined Coverage I.

Coverage I

; i i i i 3 :

Weld Me*tai 35i52 Basie metal 57 00%

Total i -

Volum.

e 2oln*e m

R"ii5t.

4.929.

966 2 %...........

22.26;2.54 5

TtlExam Coveraea 5355%

Page 21 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D - Code Item B3.110 CCNPP Component ID:

16-405A NDEReportNo.:

2003BU041 LTP No.:

103100 SummaryNo.:

103100 Coverage Sketch No:

S MO No.: 2200201399 Exam Area:

Weld Metal 360' Scale: 50%

Exam Angle:

450

/ 60° /00 (Sketch Resized for Relief Request)

Page 6 of 9 Diameter: 96" Thickness:

5.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel

[111 45*-

/ 60'-, / 0* Coverage = 3.83 in' of 4.59 in' exam area = 83.33%

NOTE: This sketch shows coverage @ 180" which was the most favorable location for these exams. Moving from 180' to 0* the coverage was gradually reduced to the point where 0%

coverage was obtained at 0".

Actual coveraae for these exams = 1.38 in' = 30,07%

Coverage Dimensions Beam Directions e h.....

.a....

W Idth....

Tli. 6 (sq.

T..........

d Nozzle T xa..........

r...a.23...

'95 Secri 0 ~ ~

Away frmw Nozzle:.I Weld Me t 3

Se Skech 4,59 Clockwise:........

Base 2Meta 4I6 S

.Sketch 22:26 counter Clockse Weld Metal: Volume =

4.59 Square Inches Covejrqage Beam. Percentoxt Beam No.

Angle Sketch (Squ. In.)

Total 4.59 I

45"t t

4.25 4.25 92.59%

2 45°,

2 0.00 0.00 0.00%

3 60em 3

4.06 4.06 88.45%

4 60°.

4 0.00 0.00 0.00%

5 45*-

5 1.38 1.38 30.07%

6 45°-

5 1.38 1.38 30.07%

7 60'-

5 1.38 1,38 30.07%

a 60*.

5 1.39 1.38 30.07%

9 0 WRV 5

1.38 1.38 30,07%

...Total Beams t

e9 l Tt Percet 33 Base Metal: Volume =

22.26 Square Inches I

~

Coverage Bem Pecnto Beam No.

Anle I Sketch 0Squ. In.)

Total 22.26 1 + 2 45*/60°-1 6

18.08 18+08 2

081.22%

3 45*-

7 10.53 10.53 47.30%

4 45'-

7 10.53 10.53 47.30%

5 60'-

7 10.53 10.53 47.30%

9 60'-

7 10.53 10.53 47.30%

7 0' WRV 7

10.53 10.53 47.30%

= :::

=

Total Beams 7

Total Percent 398,97%

Total Base.Metal.C...

07 0 t* }

Total Base Metal Coverage:

57.0044 Combined Coverage ICoverage

--4 Total-I-Weld etal

~~ ntx Volume

+.

Volume.

=

Rsl 1..

...... 6.1 §......

Base Metal,! 57.00%

22 69 79 I

"1...........

,Total Exam Coverage =

53.55% 1 i-t I........

I.

Page 22 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category B-D - Code Item B3.1110 1 Components CCNPP Component ID:

16-405A NDE Report No.: 2003BU041 LTP No.:

103100 Summary No.: 103100 Coverage Sketch No:

6 MO No.: 2200201399 Exam Area:

Base Metal 3600 Scale: 50%

Exam Angle:

450

/ 600 (Sketch Resized for Relief Request)

Page 7 of 9 Diameter: 96" Thickness:

5.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Note: At 180' the 45st,& 60°T exams were limited by the head to shell transition.

Coverage @ 180' quadrant by at least 2 sound beams = 15.07 inW.

Coverage by 1 sound beam only = 3.62 in'.

Total: 15.07 + (3.6212) = 16.88 in'.

Coverage in remaining 3 quadrants = 18.48 in' Average = (16.88 + 18.48 + 18.48 + 18.48) / 4 = 18.08 in2 18.08 in' of 22.26 in' exam area = 81.22%

Coverage.............Coverage Dimensions.......

Beam Directions Length

-x Width o

Jthicknes (S

. In.)

Twd e

a....

2

-5 EaAra:2..............................

jSýt[4.59....ytm W~eld metal~*

S23kec BaeMetal:

23 46See SketCh 2226 counter Clolctwi..s.e Weld Metal: Volume 4.59 Square Inches

Coverage, Beam..Peran of Beam No.

Antic Sketch (Squ. In.)

Total 4.59 1

45°T" 1

4.25 4.25 92.59%

2 45%

2 0.00 0.00 0.00%

3 60aT 3

4.06 4.06 88.45%

4 60° 4

0.00 0.00 0.00%

5 45'-

5 138 1.38 30.07%

6 45*-

5 1.38 1.38 30.07%

7 60*-

5 1.38 1.38 30.07%

8 6x°-

S 1.38 1.38 30.07%

9 0 ' WRV 5

1.3 6 1.36 30.07%

Totdl beams 5

Total PerceF~n' 331,37%

Total Weld Metal Covera e:

36,22%

Base Metal: Volume = :

22.26,Souare Inches ov..a9e.

Se.am Perevof..

Beam No.

Angle Sketch (Squ. In.)

Total 22.26 1 v 2 45°160°T 6

18.08

_as 2

8 1.22%

3 45'-

7 10.53 10.53 47.30%

4 45.-

7 10.53 10.53 47.30%

5 6'*-

7 10.53 105.3 47.30%

6 60s-7 10.53 10.53 47.30%

7 I°WR 7 I

05 tnvýt I

7tt 7

O'WRV 1 7

1 1053 Total 6`6.-

7 Total Percent:

398.97%

Total Base Metal Coverase:

57.00%

Coommtneo C~over Coverage Weld Metal,: 3M.82%.

x-Vo.-

lu -me 22.22 a - e " -

I....................

... * ~~~....

age Totl

+

Volumeq -----

Re-s'ult'

"~.....

Tot 2695 e29%

Total.

oa ve.a.e Page 23 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category B-D - Code Item B3.110 1 Components CCNPP Component ID:

16-405A NDE Report No.: 2003BU041 LTP No.: 103100 SummaryNo.: 103100 Coverage Sketch No: 7 MO No.: 2200201399 Exam Area:

Base Metal 360' Scale: 50%

Exam Angle:

450

/60'

/00WRV (Sketch Resized for Relief Request)

Page 8 of 9 Diameter: 96" Thickness:

5.0" Material:, CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel E]45*- / 60'--, / 0WRV Coverage = 10.53 in' of 22.26 in' exam area = 47.30%

NOTE: This sketch shows coverage @ 180' which was the most favorable location for these exams. Moving from 180' to 0' the coverage of the nozzle side base metal was gradually reduced to the point where 0% coverage was obtained at 00.

No coverage credit was taken for the nozzle side base material.

.Coverage Dimeni'ons Beam Directions

. Wid h

~

Thcns ts 6Tli

.Exam Area:l1 23..............5.6.&

3.,.........................4.59 BaseMeal: 23

4.

See Sketch 22.2659 ire Clockwise.-

[ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~.

S ketch'ii!

22".26...............

....... : 8 ";i....................Sk.h.............................

Weld Metal: Volume 4.59i Square Inches

.Ieam Percent of Beam No.

Angle I Sketch (Squ ln.*

otal 459.

1 45I' 1

4.25 4.25 92.59%

2 45'1 2

0.00 0.00 0.00%

3 60" 3

4.06 4.06 88.45%

4 60%

4 0.00 0.00 0.00%

5 45°-

5 1.38 1.38 30.07%

6 45"-

5 1.38 1.38 30.07%

7 60*-

5 1.38 1.38 30.07%

B 6

0".

5 1.36 1.36 30.07%

9 0" WRY 1.36 1.36 30.07%.

...T

. W Totalta Weald* MeTtal Coeragent 331,37%

Base Metal: Volume 22.26: Square Inches I

Coverage B.eam--

Percent of Beem No.

Axng Sketch I iSq.In.)

Tota I at 22.26 81.22%

... 1+2 45.160.'

6 18.06 18068 1.2 3

45'-

7 10.53 10.53 47.30%

4 459-7 10.53 10.53 47.30%

5 60*'.-

7 10.53 10.53 47.30%

6 60°-

7 10.53 10.53 47.30%

7 0 0WRV 7

10.53 10.53 47.30%

Total aesms:' 7 Total Percent::

398.97%

........I-i..............

L ] * '...................

q 2 1.................

- i )

i~

o V

Total ease Melat Coveraiq a::.57.0

,° Cambined Coovearao Coverage Total Perlen o,-

Volume V

Reialt Weld Metal 38+

6 62 %...

6 26 86.

2

..... Met..57.00%

o 2226

............ 6..

7. 25%

...........Total......

am..

t,

!,i i

Total Exam Coverage =

53,55%

.:.iI Page 24 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category B-D - Code Item B3.1 10 1 Components CCNPP Component ID:

16-405A NDEReportNo.:

2003BU041 LTP No.: 103100 Summary No.:

103100 Coverage Sketch No:

Exam Area MO No.:

2200201399 Exam Area:

AFGLBCKDHJE Scale:' 50%

Exam Angle:

NA (Sketch Resized for Relief Request)

Page 9 of 9 Diameter: 96" Thickness:

5.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Weld Metal Area:

FGHJ = (0.85 x 5.4) = 4.59 in2 Base Metal Area:

Vessel Side = AFJE = (1.95 x 5.4) = 10.53 in' Nozzle Side = GKDH + GLM + LKM + LBCK

= (1.95 x 5.4) + (1 x 0.6)/2 + (1 x 0.6)/2 + (1 x 0.6) = 11,73 in2 Total Base Metal Area = 10.53 + 11.73 = 22.26 in' Total Exam Area: 4.59 + 22.26 = 26.85 In' Beam Directions t Result X

Width

)e'-

'Tfii&rr6gý rd' N-cz-z'1'e'-:

T`

_j_

en9t,

7 E;xam Araaý 23 5 6

" I'll..........

1..

11

. 1 11

.111.1 1

Weld Metal:

3 See: SkOlh 4,59 Clockwise: ý7 Ease Majaýjý 23 4+u See Sketch i

22:26 Counter Clockwise:

Weld Metal: Volume =

4.59 i Square Inches G

Coverage.

EBeam Percent of Beam No.

Angle Sketch S qU In.)

Tot ta I 4i....58 1

45-t 1

4.25 4.25 92.59%

2 45"j 2

0.00 0.00 0.00%

3 60°T 3

4.06 4.06 88.45%

4 I601 4

0.00 e.oo 0.00%

5 45'-

5 1.38 1.38 30.07%

6 45*.

5 1.38 1.38 30.07%

7 0o-5 1.38 1.38 30.07%

8 60° 5

1.38 1.38 30.07%

5

0. WRV 5

1.38 1.38 30.07%

1 --11.....

[....................

Total Oeamo aTotal Percentdl3%

Total Weld Metal Coverag a 36882%,

i Base Metal: Volume e 22.26 Square Inches Coverage Beam Percent of Beam No.

Anle I Sketch lSq. In.)

Total 226.

1 *2 45t160'Ti 6

18.08 18.08 81.22%

81t22%

3 45'-

7 10.53 10.53 47.30%

4 455-7 10.53 10.53 47.30%

5 60%--

7 10.53 10.53

-47.30%

6 60"-

7 10.53 10.53 47.30%

7 0 WRV 7

10.53 10.53 47.30%

.7.i7......

I Total Beams 7TMtal Percen:

37800%

Total Bane-Metal Covara n:

87.00%

Combined Coverae

~.

i Percent weld.*e*t:JZ 3 Bae M~etal:.57.00%,ý Votame Page 25 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D -

Code Item B3.1 10 Responses to Request for Additional Information Summary No.: 103110 Comp ED: 16-405B Page 1 of 9 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Safety & Relief "B" Nozzle to Upper Head / Due to nozzle configuration coverage of nozzle side base metal and weld was limited. The nozzle enters the vessel at an angle thereby also limiting coverage attainable from the vessel side of the weld. The pressure nozzle-to-vessel head welds are accessible only from the head side based on the nozzle curvature. The scanning surface of the nozzle is essentially perpendicular to the head surface which prohibits the ultrasonic wave entering the Code required examination volume at an angle that will interrogate the weld volume for in-service flaws. The nondestructive examination (NDE) techniques and procedures used incorporated examination techniques qualified under Article 4 of Section V of the ASME Code as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 26 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category B-D - Code Item B3.110 1 Components CCNPP Component ID:

16-405B NDE Report No.: CC07-IU-031 LTPNo.:

103110 SummaryNo.:

103110 Coverage Sketch No:

1 MO No.: 2200600733 Exam Area:

Weld Metal 3600 Scale: 50%

Exam Angle:

450 (Sktetch Resized for Relief Request)

Page 2 of 9 Diameter:

96" Thickness:

5.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel M

45'T Coverage = 4.25 inW of 4.59 in2 area = 92.59%

Coverage Dimensions Beam Directions Legt Width" T'j~~4es Sq.4 r

d Na~

Exam iArea 2356 S~kth26:85 Away from Nozzle 4 WedMeal 31 See Sketch 4:59 Clc ioi se -

Base Metal:

23 14.6 See Sketch

~

2226.Counter ClockwiseI 1 Weld Metal: Volume 4.59 iSquare Inches I

Coverpag B-eamn. Percent of Beam No.

Angte Sketch 1Squ. In.

Total 4.59 1

45°t 1

4.25 4.25 92.59%

2 45°1 2

0.00 0.00 0.00%

3 60-T 3

4.06 4.06 "

E88.45%

4 60"1 4

0.00 0.00 0.00%

5 45*-

5 1.38 1.38 30.07%

6 45*-

5 1.38 1.38 30.07%

7 600-5 1.38 1.38 30.07%

8 60*-

5 1.38 1.38 30.07%

9 0 WRV 5

1.38 1.38 30.07%

Tota B....s TtalWel Metal Coeracen:i 336.37%

Base Metal: Volume w 1 22.26 I Square Inches I

Coverage.Beam Percent of Beam No.

Angle Sketch Squ. In.)

Total 22.26 1

2 45'/60-11 6

18.08 188 81.22%

81.22%

3 45*-

7 10.53 10.53 47.30%

4 456-7 10.53 10.53 47.30%

5 60*-

7 10.53 10.53 47.30%

6 60*-

7 10.53 10.53 47.30%

7 0* WRV 7

10.53 10.53 47.30%

"M.......*;

i i "" } : 5 *'

Totl Bams7 Total Percent: 395.97%

Total Base Metal Coverage: 57.00%

.J Combined Coveraga P Percent a

Weid Metalýi3 v2% I Bas Metal. 57.00%

-'odie Volume

~

-7Vr

=

Result-2226 4725 total[Exami coveraiw=

-53.55,%

i -.

Page 27 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D -

Code Item B3.1 10 CCNPP Component ID:

16-405B NDE Report No.:

CC07-IU-031 LTP No.:

103110 Summary No.: 103110 Coverage Sketch No:

2 MO No.: 2200600733 Exam Area:

Weld Metal 360' Scale:

50%

Exam Angle:

450 (Sketch Resized for Relief Request)

Page 3 of 9 Diameter: 96" Thickness:

5.0" Material:

CC/S CCIS = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Im45%l Coverage = 0 in2 of 4.59 inW area = 0%

Coverage Dimensions..

Beam Directions AraSee Sketch 28 1.80 _"Ayeay from NqzzIe:4 Se......

ei.

N i -

B~ase Metals 3

4.6 S66 Slktch 22:26 b~untiloiciie; Weld Metal: Volume =:

4.59 8Square Inches Coverage Beam... Percent of Beam No.

Angle Sketch (Squ. In.)

Total 4.59 S45T 1

4.25 4.25 92.59%

2 45*J 2

0.00 0.00 0.00%

3 60.t 3

4.06 4.06 88.45%

4 60"1 4

0.00 0.00 0.00%

5 45"-

5 1.38 1.38 30.07%

e 45*-

5 1.38 1.38 30.07%

7 60*-

5 1.38 1.38 30.07%

8 60*-

5 1.38 1.38 30.07%

S 0J WRV 5

1.38 1.38 30,07%

Base Metal: Volume.;

22.26 Square Inches Coverage Beam total Rercent of Beam No.

Angle Sketch (Squ. in.)

22,26 I ý 2 45*/60'11 6

180,,

18ýgO58 81,22%

To 53 i " "

181.221%1, 3

45*-

7 6 '3 47.30%

4 5 '_

7 10.53 1 0.53 47,30%

__r 10.53 10.53 47.30%

6 601ý 7

10.53 10,053 47.30%

7 0* WRV 7

10.53 10.53 47.30%

Total 96:5-79/6 total 3-Metal C.1-ge 57 0,3%

..... 1

.................. I...........

3......t.......................8

...I CP06V,8Crentaj-,._-

..... W all Metal 36 82'1ý Base Metal:

57.00% 1 Combined Coverage o at V016

"'V616..' I Resuit 4 5 6 29 %

7 Z5%

i rotýfjfjjiwdovaýwi",

5155%

I Page 28 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category B-D -

Code Item B3.110 1 Components CCNPP Component ID:

16-405B NDEReportNo.:

CC07-IU-031 LTPNo.:

103110 SummaryNo.:

103110 Coverage Sketch No:

3 MO No.:

2200600733 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

601 (Sketch Resized for Relief Request)

Page 4 of 9 Diameter: 96" Thickness:

5.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Note: At 180* the 60'T exam was limited by the head to shell transition.

1 60'T Coverage @ 180" quadrant, Wmax limited by head to shell transition. = 3.23 in2 Coverage in remaining 3 quadrants = 4.34 inm Average = (3.23 + 4.34 + 4.34 + 4.34) / 4 = 4.06 ina 4.06 in' of 4.59 in' exam area = 88.45%

Coverage Dlmensions Beam Directions I.......

Exam Area: 123~

526.

6T~jl 2.5 wy from N=181e:.--t el etal.

23...............

See.Skretch.......4S ic e

es Mea

.4

.Se r..r Clsc wse::ý,-

Weld Metal: Volume 4.59 tSquare Inches m

cverag........

BOam.. Percent of Beam No.

Angle Sketch (Squ. In.)

Total 4.59 1

45' 1

4.25 4.25 92.59%

2 45" 2

0.00 0.00 0,00%

3 60" 3

4.06 4.06 68.45%

4 60, 4

0.00 0.00 0,00%

5 45'-

5 1,38 1.38 30.07%

6 45*-

5 1.38 1.38 30.07%

7 60*-

5 1.38 1.38 30.07%

, 8 60*-

5 1.38 1.38 30.07%

9 WRV 5

1.3.

1.38 30.07%

Total Beamsa 9 Total Percent:Y r331.37%

.............. i

. i o

a e 36 2 Base Metal: Volume = I 22.268 Iouare Inches poeýra.gme Bearm Percent ol Beam No.

Anxle Sketch (See. In.)

Total 22.26 S

6081.22%

1 + 2 45"/60°f5 6

18.08 18.08681.22%

3 45*-

7 10.53 10.53 47.30%

4 45"-

7 10.53 10.53 47.30%

5 60'-

7 10.53 10.53 47.30%

6 60'-

1 7

10.53 10.53 1 47.30%

7 o*WRrJ 7

10 R7 10n 5 47 30A %

n. WPV 1

7 10 53

-iiii iiiiii il li iiii

,.Total Percent

57. 00%

Total ease Metall Coverge:

"Coverage

=

e Total sult Percent e

Volumei 66ni" Volumel Weld Metal 36 82%

459 2885 8.29%

base Metal.

57.00%

222.

28 47.25%

4 T~~otal ExamCvra 35%

Page 29 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D - Code Item B3.110 CCNPP Component ID:

16-405B NDE Report No.: CC07-IU-031 LTPNo.:

103110 SummaryNo.: 103110 Coverage Sketch No:

4 MO No.: 2200600733 Exam Area:

Weld Metal 3600 Scale: 50%

Exam Angle:

600 (Sketch Resized for Relief Request)

Page 5 of 9 Diameter: 96" Thickness:

5.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel M60°1 Coverage = O in2 of 4.59 in2 area = 0%

.Coverage Dimensions "Beam Directions i

~ResulIt"

.Ex Aea..23"i SeeSketch 85 Awy from

.zzle:

We Metaid'123' I

See Sketch

49.

cocis.*ij 1.

.aceMetl::

3 14.6.

e Sketch 22.26.Cne d

ci~pt~

ise6ýj:

Weld Metal: Volume J C59 'Square Inches I

Cgoerage Beam Percent o Beam No.

Angle Sketch (Squ. In.)

total 4.59 1

45"T 1

4.25 4.25 9259%

2 45-1 2

0.00 0.00 0.00%

3 60"T 3

4.06 4.06 88.45%

4 60%

4 0.00 0.00 0.00%.........

5 45°-

5 1.38 1.38 30.07%

6 45*-

5 1.38 1.38 30.07%

7 600-5 1.38 1.38 30.07%9/

8 60 5

11.38 1.38 30.07%

i..;,..........

a * * * *

i i 8

2 Total Beams 9

Total Percn:l 3.7 Total Weld Metal Coverage: 36.82%

Base Metal: Volume =

22.26, Square Inches I

Coverage Beam Percent of Beam Na.

Angin Sketch IS46. In.)

Total.

2.2 26 1 + 2 45"160-T1 6

18.08 18.08 8

81.22%

3 45*-

7 10.53 10.53 47.30%/

4 45'-

7 10.53 47.30%

5 60"-

7 10.53 10.53 47.30%

.6 60'-

7 10.53 10.53 47.30%

7 10'WRV 7

10.53 10.53 47.30%

ata Beas Total Perent:.

3 Total Base MetalCo av~er

,: 57,00%

r L..

C~ombined C~overage i

tLoverage4

. M ercent WeldMetial:

36.82%,

Base Metal: 5.01 S 22 i !i:i!ill 2...8 *.....

8..

!Si.25

'.85 47.25%g

. ~ ~ ~ ~ ~ ~ oa E.a

.oeo......

35*IX Page 30 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category B-D -

Code Item B3.110 1 Components CCNPP Component ID:

16-405B NDE Report No.:

CC07-IU-031 LTP No.:

103110 SummaryNo.:

103110 Coverage Sketch No:

5 MO No.:

2200600733 Exam Area:

Weld Metal 3600 Scale:

50%

Exam Angle:

450

/600

/ 00 (Sketch Resized for Relief Request)

Page 6 of 9 Diameter: 96" Thickness:

5.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel

] 45°-

/ 60°- / 0° Coverage = 3.83 in2 of 4.59 in' exam area = 83.33%

NOTE: This sketch shows coverage @ 180' which was the most favorable location for these exams. Moving from 180* to 0' the coverage was gradually reduced to the point where 0%

coverage was obtained at 0'.

Actual coverace for these exams = 1.38 in' = 30,07%

o.

verage Dimensions Beam Directions Len.

Width.

Th56keti i.(S... 2 8

To. ar* Nozzle: T.

LiamwArea:c],

23

~

5.6" See Sketch.......26.85 "'way fr'mNozztIe I

..Weld Metal:1 j

31See Sketch 4 :59 clc kisc e.:

Base Mvetalý 23

.4.6 See Sketch

.22:26.Cunter aockwJoe: -'

Weld Metal: Volume =

4.59ýS uare Inches I

Coverae Beam Percent ot Beam No.

Angle Sketch Squ. In.)

Total 4.59 1

456' 1

4.25 4.25 92.59%

2 45' 2

0.00 0

o.00%

3 60e 3

4.06 4.06 88.45%

64 0'-

4 0.00 0.00 0.00%

5 45'-

5 1.38 1.36 30.07%

6 45'-

5 1.38 1.38 30.07%

7 60'-

5 1.38 1.38 30.07%

6 6-.

5 1.362 1.36 30.07%

-........ 9 0 'w IR 5 I 1.36 1.38 1 30.07%......

i......

...5./

.... i........................

Total Beams: 9 Total Perace:t36.82%

Total Weld Metal Coversge::

36.62%

Base Metal: Volume 1l 22.26 Square Inches Beam o

As S

Coverage Beam Percent of BeamNo.I A

e ISketch l

l.

In)

Total 2:216 1

2 45"/60°T4 6

18.08 18.08 1.22%

3 45*-

7 10.53 10.53 47.30%

4 4C57 7

10.53 10.53 47,30%

5 60*-

7 10.53 10.53 47.30%

6 60*-

7 10.53 10.53 47.30%

7 0I WRV 7

10.53 10.53 47.30%

Total Beams 7

Total Percent7 36 97%

T o a B a s e M e.

.t..a l C..

ove...

..r I.a

.g..

5 7 0.0 %

I

.i.

4.L..i*~

i:il I...........

Combined Coverage

!Coverage~

Percent :

a volame-4 Wel MetA.tal: 3642 5.49 Base Metal:57.00%

22.26 Total.... l

i.................

29, 1%...................

I.

i.......

-. 111Lt.at Exam Covra~le =

53.55%/

0 oueRsl Page 31 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D -

Code Item B3.110 CCNPP Component ID:

16-405B NDE Report No.:

CC07-IU-031 LTPNo.:

103110 SummaryNo.:

103110 Coverage Sketch No:

6 MO No.: 2200600733 Exam Area:

Base Metal 3600 Scale:

50%

Exam Angle:

450

/ 60' (Sketch Resized for Relief Request)

Page 7 of 9 Diameter: 96" Thickness:

5.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Note: At 1680 the 45"T & 6oeT exams were limited by the head to shell transition.

45 Wmax Wmax

-0 6*

45.- __

Ves*el Coverage @ 180' quadrant by at least 2 sound beams = 15.07 inW.

N N

Coverage by 1 sound beam only = 3.62 in 0.

Total: 15.07 + (3.62/2) = 16.88 in 0.

Coverage in remaining 3 quadrants = 18.48 in 0

Average = (16.88 + 18.48 + 18.48 + 18.48) / 4 = 18.08 in 0

18.08 in' of 22.26 in 0 exam area = 81.22%

Coverage Dimensions Beam Directions L.ei ngth x

W idth....

hc........

kess R

t.....

2 8 o i 1S~

1 Nfvr~

ozziaý Exam n Ara:

23 e

!See Sketch?

26.85 fA~

rom' Nozzle:4 Weltd Metal:

23 I1Se Sk 4.59 Clockwse.:

ease Metal:

23

46...........S6

. S*lktch 22.26 Counter cloc.se::

Weld Metal: Volume :

4.59 Square Inches i

Coverage Beam Percent of Beam No.

Andle Sketch Squ. In.

Tota.

4.59.

1 45°'

1 1

4.25 4.25 92.59%

2 45"1 2

0.00 0.00 0.00%

3 60"T 3

4.06 4.06 88,45%

4 60".

4 0.00 0.00 0.00%

5 45'-

5 1.38 1.38 30.07%

6 45*-

5 1.38 1.38 30.07%

7 60s-5 1.38 1.38 30.07%

8 60'-

5 1.38 1,36 30.07%

0* WRV 5

1.38 1.36 30,07%

:: :i:.

Total Beams& 9 Total Percent: r'33t.37%

r Base Metal: Volume i

22.26 Square Inches C ioverage.......Beam,

.Percent 0f Beam No.

Angle Sketch (Squ. In.)

Total 22.26 1 +2 45/60 6

18.08 1.0 81.22%

'N 81.22%

7 10.53 10.53 47.30%

4 45 7

10.53 10.53 47.30%

5 60 7

10.53 10.53 47.30%

6 60 7

10.53 10.63 47.30%

0 WRV 7

10.53 10.53 47.30%

........" i......... i..................................... -'t...

Toa Bas7 Total Percent:

398.97%

I Total Base Metal Covera e:

57.00%

Combined Coverage Coverage Volum Total u

0 Vo ume

....Result Wel 459a I682 26685 Bas... etal....................

222 26.65 B s

s * *

~~Totat Exam Coveraeu435' Page 32 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D -

Code Item B3.110 CCNPP Component ID:

16-405B NDE Report No.: CC07-IU-031 LTPNo.:

103110 SummaryNo.:

103110 Coverage Sketch No:

7 MO No.: 2200600733 Exam Area:

Base Metal 3600 Scale: 50%

Exam Angle:

450 / 600

/O° WRV (Sketch Resized for Relief Request)

Page 8 of 9 Diameter: 96" Thickness:

5.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel

[I 45"*- 60'- / 0' WRV Coverage = 10.53 in' of 22.26 in' exam area = 47.30%

NOTE: This sketch shows coverage @ 180" which was the most favorable location for these exams. Moving from 180" to 0' the coverage of the nozzle side base metal was gradually reduced to the point where 0% coverage was obtained at 0'.

No coverage credit was taken for the nozzle side base material.

.Coveragle Dimensio ns...........................

eam Directions ea....

Weldmeam l:

23 sae5ktchi r

4.!59 C Nokwie:I

i.

23 1

i.....

Base Metail -

234.

6 e,2.6

'atrC6 s:-

Weld Metal: Volume =i 4.59 i Square Inches I

I Coverage Beam Percent of Beam No.

Angle I Sketch (Sq,. In.)

Tti........4.9....

1 45"t 1

1 4.25 4.25 92.59%

2 45°1 1

2 0.00

.00o 0b00%

3 60'T 3

4.06 4.06 88.45%

4 60"-

4 0.00 0.00 0.00%

5 45"*-

5 1.38

-1,38

-70,07%/

6 45*-

5 1.38 1.38 30.07%

7 60'-

5 1.8 13 31.07%

8 60*-

5

.3 1.8 30.07%

9 0° WRV 5

W.8 13 007%

ToitalBeams:

Total Percent,-

331.37%

i.......................

W eid -M ef'ai.,o, m i 6 :T i */.

.2,%'

Base Metal: Volume 22.26 Square Inches I

I Coverage Beam Percent of Beam No.

Anin, Sketch lSu.

In.)

Toto.

22.26.

1 +2 45°/60°11 6

18.08 i808 e

1

,22%

81.22%

3 45'-

7 10.53 10.53 47.30%

4 45°-

1 7

10.53 10.53 47.30o%

5 60°-

7 10.53 10.53 47.3a%

a6 60°-

7 10.53 10.53 47.30%

7 5 WRV 7

10.53 10.3 47.3°0%

.I..

q

....I............

e~ * *.......

q

.Tota Base Metal Coverage 5.0 Combined Coverage Covera e Total ~

ee Perclume Vo5Tune Waeld ta M

isi 455 26.85 6.29%i Totai ExýWiam ovraeo 53.55%/

Page 33 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category B-D - Code Item B3,110 CCNPP Component ID: 16-4058 NDE Report No.:

CC07-IU-031 LTP No.: 103110 SummaryNo.:

103110 Coverage Sketch No:

Exam Area MO No.: 2200600733 Exam Area:

AFGLBCKDHJE Scale:

50%

Exam Angle:

NA (Sketch Resized for Relief Request)

Page 9 of 9 Diameter:

96" Thickness:

5.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Weld Metal Area:

FGHJ = (0.85 x 5.4) = 4.59 1n2 Base Metal Area:

Vessel Side = AFJE = (1.95 x 5.4) = 10.53 in2 Nozzle Side = GKDH + GLM + LKM + LBCK

= (1.95 x 5.4) + (1 x 0.6)/2 + (1 x 0.6)/2 + (1 x 06) = 11.73 in2 Total Base Metal Area = 10.53 + 11.73 = 22.26 in2 Total Exam Area: 4.59 + 22.26 = 26.85 In Coverage Dimensions Beam Directions Thicknet T

eghWit x1

Tfi0cknes i(Squ.linl Toward Nozzel :

E. am"

."23.

8 5e

]~Si" ed M e ta i.....

2 3 1

$ 6...............

e S ke tc h............................

4. 9.Co kw s.

2.................

1....SS ec.cockwise:

ease Metal:).23........

4:6.....See Sket~h........22:26 t6ne Clcws-Weld Metal: Volume :i 4.59 I Square Inches I

Covrvee eam Percent of

Beam No.

An le Sketch (Squ. In.+

Total 4.59 1

45'T 1

4,25 4.25 92.59%

2 45"1 2

0.00 0+00 0.00%

3 60oT 3

4.06 4.06 88.45%

4 e0" 4

0.00 e.00 0.00%

5 45".

5 1.38 1.38 30.07%

6 45*-

5 1.38 1.38 30.07%

7 60'-

5 1.38 1.38 30.07%

8 60e-5 1.35 1.38 30.07%

09 WRV 5

1,38 1.35 30.07%

Total Beams 9

i Total Percent: r 331.37%

iT Base Metal: Volume :

22.26 iSquare Inches I

coverage....Beam*.

Prcent.01 eea Neo.o An Ia Sketch I S o. In.I Total 22.25 81.22%

... 1 + 2 45"/60-1"1 6

18.08.

18.08 8123 3

45'-

7 10.53 10.53 47.30%

4 45

]-

7 10.53 10.53

-47.30%/6 5

60"*-

7 10.53 10.53 47.30%

6 60'-.

7 10.53 10.53 47.30%

7 0'=WRV 7

10.53 10.53 47.30%

.77

.7 1.7777 11.!.........77.......

I Total Beams 7 i

Total Percent::

398.97%

Total Base Metal Coverage:

57.00%

i I I

Combined Coverage

( *Coverage

i/

Total i

I

-Volcmet volume Rsl

" ~ i'ceh f ** " "*'* "" "'V6 *i*' -T -- "*'*

'["

61

".. "".".R..........

Wel.. Metal: 3.,82%

42U5.55 6,29%

Buss Metal:

57.00% :

22.26 I

265.5 47'25 Total Exam Coverae =

5 53.55%

Page 34 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class I Components Code Category R-A -

Code Item RI. 11 Responses to Request for Additional Information Summary No.: 109360 Comp ID: 30-RC-21A-10/2-CV-2005 Page I of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Pipe to Branch Connection / Coverage of weld from Branch (nozzle) Penetration side of weld limited due to configuration. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1L 1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative

' examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical-::

barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

J

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 35 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category R-A - Code Item RI. 11 1 Components CCNPP Component ID:

30-RC-2 1A-10/2-CV-2005 NDEReportNo.:

CC07-IU-030 LTP No.: 109360 SummaryNo.:

109360 Coverage Sketch No:

NA MO No.: 2200600729 Exam Area:

Lower T / 1/2 " From Toe Scale:

100%

Exam Angle:

450/ 600 (Sketch Resized for Relief Request)

Page 2 of 2 Diameter:

8" Thickness:

3.0" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Covera ge Calc Exam Coverage Ax Upst 100%

Ax Onst 0%

Circ Upst 100%

Circ Dnst 100%

Total:

300%

Total / 4:

75%

30" RC Pipe Coverage Caic Exam. Cove AxUpst 100%.

Ax Dnst 0%

Circ Upst 100%

Circ Onst 100%

Tota.

300%

TotalT4-'

75%-*

Page 36 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class I Components Code Category R-A - Code Item RI.1 1 Responses to Request for Additional Information Summary No.: 136020 Comp ID: 4-PS-2003-2 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Tee to Pipe / Adjacent weld in close proximity on pipe side limited coverage to Tee side which was also limited by obstruction by a penetration in close proximity to the weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90%

coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 37 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category R-A - Code Item Ri. 11 CCNPP Component ID:

4-PS-2003-2 NDEReportNo.:

CC70-IU-045 LTP No.:

136020 Summary No.:

136020 Coverage Sketch No:

NA MO No.:

2200600733 Exam Area:

Lower Scale:

100%

Exam Angle:

600 / 700 Page 2 of 2 Diameter: 4" Thickness:

0.44' Material:

S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Ad jCent Weld

%TC1 Pipe Tee a

Exam Coverage = 50% per single sided access rules.

o This sketch represents 7.5" of 15" Weld Length. Remainder of weld obstructed by branch of Tee.

Upstream Coverage = 50% Ax /50% Circ.

Far side of weld examined per single sided access rules.

Pipe coverage credit taken.

Coverage Calc

Exam Coverage

.AxUpst

.50%

Ax Dnst 0%

Circ Upst 50%

Circ Dnst 100%

Total:

200%0 Total / 4:

50%

Page 38 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category R-A - Code Item RI. 11 Responses to Request for Additional Information Summary No.: 136040 Comp ID: 4-PS-2003-4 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for'each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Tee to Pipe / Due to geometry no coverage was attainable on Tee side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 39 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category R-A - Code Item Ri. 11 1 Components CCNPP Component ID: 4-PS-2003-4 NDEReportNo.:

CC07-IU-050 LTP No.:

136040 SummaryNo.:

136040 Coverage Sketch No:

NA MO No.:

2200600733 Exam Area:

Lower T

Scale:

100%

Exam Angle:

600 / 700 (Sketch Resized for Relief Request)

Page 2 of 2 Diameter: 4" Thickness:

0.44" Material:

S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Tee Exam Coverage = 50% per single sided access rules.

Pipe Far side of weld examined per single sided access rules. No coverage credit taken.

Page 40 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category R-A -

Code Item Rl. 11 Responses to Request for Additional Information Summary No.: 138470 Comp ID: 3-PS-2002-27 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Valve to Pipe / Due to taper on valve body no coverage was attainable from valve side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since oneside of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.,

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical.

barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 41 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category R-A -

Code Item Ri. 11 1 Components CCNPP Component ID:

3-PS-2002-27 NDEReport No.:

CC07-IU-051 LTP No.:

138470 SummaryNo.: 138470 Coverage Sketch No:

NA MO No.: 2200600733 Exam Area:

Lower T

Scale: 100%

Exam Angle:

600 / 70*

(Sketch Resized for Relief Request)

Page 2 of 2 Diameter: 3" Thickness:

0.41" Material:

S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Valve Exam Coverage = 50% per single sided access rules.

Far side of weld examined per single sided access rules. No coverage credit taken.

Page 42 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category R-A -

Code Item RI. 11 Responses to Request for Additional Information Summary No.: 143030 Comp ID: 2.5-SR-2003-4 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Elbow to Pipe / Adjacent weld in close proximity to examined weld limited coverage which was also limited.

at Intrados of Elbow being in close proximity to the weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination dr partial two-sided examination resulting in less than 90%

coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code' See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2. 1,1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 43 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category R-A -

Code Item RI. 11 1 Components CCNPP Component ID:

2.5-SR-2003-4 NDE Report No.:

2003BU032 LTP No.:

143030 Summary No.:

143030 Coverage Sketch No:

NA MO No.:

2200201399 Exam Area:

Lower T

Scale:

100%

Exam Angle:

450 / 700 (Sketch Resized for Relief Request)

Page 2 of 2 Diameter: 2.5" Thickness:

0.38" Material:

S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel

.Flow b

70-Exam Coverage = 50% per single sided acess rules.

Axial exam obstructed by intrados from 3.5" to 6",

Examined.6.625 of,9.125"'

72.6%

.Coverage Calc Exam Coverage Ax Upst 72.6%

Ax Dnst 0%

Cic uPst 100%

Circ Dnst 0%

Total:

172.6%

Tot*I 4:

" 43%

Page 44 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class I Components Code Category R-A -

Code Item R1.20 Responses to Request for Additional Information Summary No.: 116180 Comp ID: 12-SI-2010-12 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific' information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Elbow to Safe End / No Code coverage was credited for scanning performed from Cast Stainless Steel Safe End side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base

.metal based on the surface angle of the component; therefore, the welds received a single-sidedexamination or partial two-sided examination resulting in less than 90% coverage of the required examination volume.

The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1. 1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 45 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category R-A - Code Item R1.20 1 Components CCNPP Component ID:

12-SI-2010-12 NDE Report No.: CC09-IU-020 LTP No.:

116180 Summary No.: 116180 Coverage Sketch No:

NA MO No.: 2200800092 Exam Area:

Lower T

Scale:

100%

Exam Angle:

450 / 600 / 700 (Sketch Resized for Relief Request)

Page 2 of 2 Diameter:

12" Thickness:

1.13" Material:

S/S to CASS CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Exam Coverage = 50% per single sided access rules.

Far side of weld examined per single sided access rules. No coverage credit taken.

Page 46 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category R-A - Code Item R1.20 Responses to Request for Additional Information Summary No.: 117110 Comp ID: 12-SI-2011-12 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Elbow to Safe End / No Code coverage was credited for scanning performed from Cast Stainless Steel Safe

.End side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume.

The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.. 1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 47 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category R-A - Code Item R1.20 Page 21of 2 CCNPP Diameter:

12" ComponentID:

12-SI-2011-12 NDEReportNo.:

CC09-1U-018 Thickness:

1.13" LTP No.:

117110 SummaryNo.:

117110 Material:

S/S to CASS Coverage Sketch No:

NA MO No.:

2200800093 CC/S = Clad Carbon Steel Exam Area:

Lower T

Scale: 100%

S/S = Stainless Steel Exam Angle:

450 / 600 / 700 CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Exam Coverage = 50% per single sided access rules.

Far side of weld examined per single sided access rules. No coverage credit taken.

Page 48 of'54

- Relief Request ISI-26 for CCNPP Unit 2 Class I Components Code Category R-A - Code Item R1.20 Responses to Request for Additional Information Summary No.: 118110 Comp ID: 12-SI-2012-12 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Pipe to Safe End / No Code coverage was credited for scanning performed from Cast Stainless Steel Safe End side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2:1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative

'examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the-above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 49 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category R-A - Code Item R1.20 CCNPP Diameter:

12" Page 2 of 2 Component ID:

12-SI-2012-12 NDE Report No.:

CC09-IU-019 Thickness:

1.16" LTP No.: 118110 SummaryNo.: 118110 Material:

S/S to CASS Coverage Sketch No:

NA MO No.: 2200800093 CC/S = Clad Carbon Steel Exam Area:

Lower T

Scale: 100%

S/S = Stainless Steel Exam Angle: 450 / 600 / 70' CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Exam Coverage = 50% per single sided access rules.

Far side of weld examined per single sided access rules. No coverage credit taken.

Page 50 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category R-A -

Code Item R1.20 Responses to Request for Additional Information Summary No.: 139000 Comp ID: 4-SR-2001-1 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Tee to Pipe / No examination could be performed from Tee side of weld due to Weld crown configuration.

This also limited coverage from the pipe side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable sinceone side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90%

coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.;1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 51 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class Code Category R-A - Code Item R1.20 1 Components CCNPP Component ID: 4-SR-2001-1 NDE Report No.:

2003BU023 LTP No.:

139000 Summary No.:

139000 Coverage Sketch No:

NA MO No.:

2200201399 Exam Area:

Lower T

Scale:

100%

Exam Angle:

450 / 70' (Sketch Resized for Relief Request)

Page 2 of 2 Diameter: 4" Thickness:

0.50" Material:

S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Exam Coverage = 50% per single sided access rules.

70*

L IRL'~

Tee 0

1 Pipe Far side of weld examined per single sided access rules. No coverage credit taken.

Page 52 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category R-A -

Code Item R1.20 Responses to Request for Additional Information Summary No.: 141010 Comp ID: 4-SR-2005-2 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Safe-end to Elbow / Due to geometry no coverage was attainable on Safe End side of weld due to taper and lift-off at weld toe also limited coverage from elbow side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90%

coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify, the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 53 of 54

- Relief Request ISI-26 for CCNPP Unit 2 Class 1 Components Code Category R-A -

Code Item RI.20 C.CNPP Component ID: 4-SR-2005-2 NDE Report No.:

2003BU038 LTP No.:

141010 Summary No.:

141010 Coverage Sketch No:

NA MO No.:

2200201399 Exam Area:

Lower T

Scale:

100%

Exam Angle:

450 / 70' (Sketch Resized for Relief Request)

Page 2 of 2 Diameter: 4" Thickness:

0.41" Material:

S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow_

Exam Coverage = 50% per single sided access rules.

Safe End Elbow Safe End Elbow Far side of weld examined per single sided access rules. No coverage credit taken, Page 54 of 54

ENCLOSURE 4 Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Calvert Cliffs Nuclear Power Plant, LLC December 16, 2010

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category C-A -

Code Item CI.10 Responses to Request for Additional Information Summary No.: 201650 Comp ID: SCHE-22-1 Page 1 of 4 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1. 1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Channel Barrel-to-Flange / Close proximity of Flange transition to the weld limits attaining full coverage from the flange side of weld. The ultrasonic interrogation of the channel shell to flange weld could only be partially obtained from flange side due to the component configuration and close proximity of the weld to the flange transition. The nondestructive examination (NDE) techniques and procedures used incorporated similar examination techniques qualified under Appendix III of the ASME Section XI Code, as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2..1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus),, details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative J

examinations are planned for the welds during the current inspection interval. The use, of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 1 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category C-A -

Code Item C1.10 CCNPP Component ID: SCHE-22-1 LTP No.:

201650 Coverage Sketch No:

1 Exam Area:

Ax Upst. (360 )

Exam Angle:

450 / 700 NDE Report No.:

2003BU006 Summary No.: 201650 MO No.:

2200201386 Scale:

100%

Page 2 of4 Diameter: 45" Thickness:

1.25" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

'Flow Flang '

1 470" Flange 45' Channel Barrel SS Cladding 45W IM45° / 70'Axial Coverage from Upstream side = 0.76 inz of 2.44 in2 exam area = 31.2%

Page 2 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category C-A -

Code Item C1.10 CCNPP Component iD:

SCHE-22-1 NDEReportNo.:

2003BU006 LTP No.: 201650 SummaryNo.:

201650 Coverage Sketch No:

2 MO No.: 2200201386 Exam Area:

Ax Dnst. (3606)

Scale:

100%

Exam Angle:

450 / 700 (Sketch Resized for Relief Request)

Page 3 of 4 Diameter: 45" Thickness:

1.25" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Flange lChannel Barrel E

45' / 70*Axial Coverage from Upstream side = 2.16 inW of 2.44 in2 exam area = 88.5%

Page 3 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category C-A - Code Item C1.10 CCNPP Component ID:

SCHE-22-1 LTP No.: 201650 Coverage Sketch No: 3 Exam Area: Circ (3600)

Exam Angle:

450 NDE Report No.:

2003BU006 Summary No.:

201650 MO No.:

2200201386 Scale: 100%

Page 4 of 4 Diameter: 45" Thickness:

1.25"'

Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Flange SChannel Barrel SS Cladding

'.t' 450 Circ Coverage CW/ CCW = 1.5 in2 of 2.44 in2 exam area = 61.5%

Axial Coverage Ax Upst = 31.2%

Ax Dnst = 88.5%

(31.2 + 88.5) / 2 = 59.85%

Circ Coverage 61.5%

Total Coverage (59.85 + 61.5) / 2 61 Page 4 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category C-A -

Code Item C1.10 Responses to Request for Additional Information Summary No.: 201700 Comp ID: SCHE-22-2 Page 1 of 3 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Channel Barrel-to-Flange / Close proximity of Flange transition to the weld limits attaining full coverage from the flange side of weld. The ultrasonic interrogation of the channel shell to flange weld could only be partially obtained from flange side due to the component configuration and close proximity of the weld to the flange transition. The nondestructive examination (NDE) techniques and procedures used incorporated similar examination techniques qualified under Appendix III of the ASME Section XI Code, as supplemented by Table 1-2000-1. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.. 1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 5 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category C-A -

Code Item CI.10 CCNPP Diameter: 45"Page 2 of 3 Component ID:

SCHE-22-2 NDEReportNo.:

CC05-IU-003 Thickness:

1.25" LTP No.:

201700 SummaryNo.:

201700 Material:

CC/S Coverage Sketch No: 1 MO No.: 2200400808 CC/S = Clad Carbon Steel Exam Area:

360' Scale:

100%

S/S = Stainless Steel Exam Angle:

45' / 600 Ax Upst CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Channel Cover Shell Flange

[

45°/ 60°Axial Coverage from Upstream side = 2.56 in2 of 3.0 in2 exam area 85.3%

Page 6 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category C-A -

Code Item C 1.10 CCNPP Component ID: SCHE-22-2 NDEReportNo.:

CC05-IU-003 LTP No.:

201700 Summary No.:

201700 Coverage Sketch No:

2 MO No.:

2200400808 Exam Area:

Ax Dnst. (3600)

Scale:

100%

Exam Angle:

450 / 600 (Sketch Resized for Relief Request)

Page 3 of 3 Diameter: 45" Thickness:

1.25" Material:

CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow Channel Cover Shell Flange 45' / 60°Axial Coverage from Upstream side = 1.35 in' of 3.0 in2 exam area = 45%

Page 7 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category C-A - Code Item C2.21 Responses to Request for Additional Information Summary No.: 201400 Comp ID: SCHE-21-N1 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Inlet Nozzle to Shell / Due to nozzle configuration coverage of the nozzle side base metal and weld was limited. The nozzle-to-shell weld is primarily accessible from the shell side based on the component configuration. The nozzle scanning surface is essentially perpendicular to. the shell which prohibits the ultrasonic wave entering the Code required examination volume at an angle that will interrogate the weld

,volume for in-service flaws. The NDE techniques and procedures used incorporated similar examination techniques qualified under Appendix III of the ASME Section XI Code, as supplemented by Table 1-2000-1.

See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 8 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category C-A - Code Item C2.21 CCNPP Component ID:

SCHE-21-N1 NDEReportNo.:

2001BU006 LTP No.: 201400 Summary No.:

201400 Coverage Sketch No: 1 MO No.:

2200002397 Exam Area:

3600 Scale:

100%

Exam Angle / Direction:

450 / 700 Ax Upst (Sketch Resized for Relief Request)

Page 2 of 2 Diameter:

10" Thickness:

1.125" Material:

S/S to CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow 701 456 70" Axial Coverage from Upstream side = 100%

45' 70' Axial Coverage from Downstream side =0%

C ove tge Cai Exam Coverage AxUpst 1

'-100%~

Ax Dnst K0%

Page 9 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category C-A - Code Item C2.21 Responses to Request for Additional Information Summary No.: 201500 Comp ID: SCHE-21-N2 Page 1 of 3 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Outlet Nozzle to Shell / Due to nozzle configuration coverage of the nozzle side base metal and weld was limited. The nozzle-to-shell weld is primarily accessible from the shell side based on the component configuration. The nozzle scanning surface is essentially perpendicular to the shell which prohibits the ultrasonic wave entering the Code required examination volume at an angle that will interrogate the weld volume for in-service flaws. The NDE techniques and procedures used incorporated similar examination techniques qualified under Appendix III of the ASME Section XI Code, as supplemented by Table 1-2000-1.

See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

-This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 10 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category C-A - Code Item C2.21 CCNPP Component ID:

SCHE-21-N2 NDE Report No.:

CC09-1U-005 LTP No.:

201500" Summary No.:

201500 Coverage Sketch No:

1 MO No.:

2200800083 Exam Area: 360' (40")

Scale:

100%

Exam Angle / Direction:

45' / 70' Ax Upst Page 2 of 3 Diameter:

10" Thickness:

1.125" Material:

S/S to CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Nozzle Flow

\\

':'::': ""70*

S450 70* Axial Coverage from Upstream side =100%

450 1 70' Axial Coverage from Downstream side =0%

0 Page 11 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category C-A - Code Item C2.21 CCNPP Component ID:

SCHE-21-N2 NDE Report No.:

CC09-1U-005 LTP No.:

201500 SummaryNo.:

201500 Coverage Sketch No: 2 MO No.:

2200800083 Exam Area: 3600 Scale:

100%

.Exam Angle / Direction:

450 CW / CCW (Sketch Resized for Relief Request)

Page 3 of 3 Diameter:

10" Thickness:

.1.125" Material:

S/S to CC/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Nozzla Flow A

I dw::::::::*

Shell E9450 CW CCW Coverage = 52.5%

Coverage Calc Exam Coverage Ax Upst 100%

Ax Dnst 0%

CW 52.5%

CCW 52.5%

Total:

205%

Total / 4:

51.3 Page 12 of 20

(

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category R-A - Code Item R1.20 Responses to Request for Additional Information Summary No.: 215100 Comp ID: 10-SI-2002-3 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Pipe to Valve / Due to taper on valve body no coverage was attainable from valve side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under:

Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1.1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical i barriers prohibiting access for placement of source, film, image quality indicator, etc.

2. 1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

d Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 13 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category R-A - Code Item R1.20 CCNPP Page 2 o~f 2 CCNPP Diameter:

10" Component ID:

10-SI-2002-3 NDE ReportNo.:

CC04-IU-044 Thickness:

0.25" LTP No.:

215100 SummaryNo.: 215100 Material:

S/S

..Coverage Sketch No:

NA MO No.: 2200400809 CC/S = Clad Carbon Steel Exam Area:

Lower T

Scale: 100%

S/S = Stainless Steel Exam Angle:

45° / 700 CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Pipe e-2-2--

Exam Coverage = 50% as per single sided access rules.

Exam obstructed for 4" due to Branch Connection In close proximity to weld.

Adjusted Coverage = 50% (29.5" of 33.5" weld length) = 44%.

Page 14 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category R-A - Code Item R1.20 Responses to Request for Additional Information Summary No.: 215550 Comp ID: 10-SI-2003-2 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Flange to Expander/ Close proximity of Flange transition to the weld limits attaining coverage from the flange side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2':1. 1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Responise:

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 15 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category R-A - Code Item Ri.20 CCNPP Component ID:

10-SI-2003-2 NDE Report No.:

CC05-lU-001 LTP No.:

215550 Summary No.:

215550 Coverage Sketch No:

NA MO No.: 2200400808 Exam Area:

Lower T

Scale:

100%

Exam Angle:

450 / 700 (Sketch Resized for Relief Request)

Page 2 of 2 Diameter:

10" Thickness:

0.38" Material:

S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Exam Coverage = 50% as per single sided access rules.

FlangeExpander Far side of weld examined as per single sided access rules - No coverage credit taken.

Page 16 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category R-A - Code Item R1.20 Responses to Request for Additional Information Summary No.: 225750 Comp ID: 6-SI-2004A-19 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and.

therefore, demonstrate impracticality. The questions for each relief request are as follows:

2. 1.1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Elbow to Reducer / Access to bottom of weld obstructed by immovable structural member (I-beam). The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used incorporated examination techniques qualified under-Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2.1..1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and i...

discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative

.examinations are planned for the welds during the current inspection interval. The use of radiograimhy as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film,. image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2.1.1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 17 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category R-A - Code Item R1.20 CCNPP Component ID: 6-SI-2004A-19 NDE Report No.:

CC07-lU-004 LTP No.: 225750 Summary No.: 225750,

Coverage Sketch No:

NA MO No.: 2200600723 Exam Area:

Lower T

Scale:

100%

Exam Angle:

600 (Sketch Resized for Relief Request)

Page 2 of 2 Diameter: 6" Thickness:

0.43" Material:

S/S CC/S = Clad Carbon Steel S/S = Stainless Steel CASS = Cast Stainless Steel Flow 7oo

-Ostuto LO L

18.18" Exam Coverage = 100% for 14.8" of 18.8" weld length = 78.7%

Page 18 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class, 2 Components Code Category R-A -

Code Item R1.20 Responses to Request for Additional Information Summary No.: 230650 Comp ID: 6-SI-2017-11 Page 1 of 2 The NRC requested Calvert Cliffs Nuclear Power Plant, LLC (CCNPP) to provide detailed and specific information to support the bases for limited examination in all requests for relief submitted on June 30, 2010, and therefore, demonstrate impracticality. The questions for each relief request are as follows:

2.1,1 a)

Include detailed descriptions (written and/or sketches, as necessary) of the interferences affecting NDE techniques.

Response

Elbow to Pipe / Integral welded attachment (saddle) adjacent to weld prevented access to the lower 180 degrees of weld on pipe side of weld. The ultrasonic examination of the above pipe welds was limited in coverage due to component configuration (weld location relative to scanning surface, curvature/taper) and/or immovable penetrations and/or attachments. For these welds obtaining full coverage from both sides of the weld was not attainable since one side of the weld was not optimally oriented for scanning of the weld and adjacent base metal based on the surface angle of the component; therefore, the welds received a single-sided examination or partial two-sided examination resulting in less than 90% coverage of the required examination volume. The percentage of coverage reported represents the aggregate coverage from all examination angles and scans performed on the weld and adjacent base material. The NDE techniques and procedures used 7

incorporated examination techniques qualified under Appendix VIII of the ASME Section XI Code. See attached sketches derived from examination data on file at CCNPP.

2:1. 1 b)

As applicable, describe NDE equipment (ultrasonic scanning apparatus), details of the listed obstructions (size, shape, proximity to the weld, etc.) to demonstrate accessibility limitations, and discuss whether alternative methods or advanced technologies could be employed to maximize ASME Code coverage.

Response

This was a manual UT examination. Limitations are as detailed on the attached sketches. No alternative examinations are planned for the welds during the current inspection interval. The use of radiography as an alternate volumetric examination for all the above listed components is not practical due to component thickness and geometric configurations. Other restrictions making radiography impractical are the physical barriers prohibiting access for placement of source, film, image quality indicator, etc.

2.1.1 c)

Fully clarify the wave mode(s) and insonification angles used for all ultrasonic examinations.

Response

Wave modality used included longitudinal and shear. Insonification angles were as indicated on the scan tables on the attached sketches.

2. 1. 1 d)

Provide cross-sectional coverage plots to describe ASME Code volumes and transducer angles used during the examination.

Response

See attached sketches derived from examination data on file at CCNPP for cross sectional coverage plots and calculations.

Page 19 of 20

- Relief Request ISI-27 for CCNPP Unit 2 Class 2 Components Code Category R-A - Code Item R1.20 CCNPP Diameter:

6" Page 2 of 2 Component ID:

6-51-2017-11 NDE Report No.:

CC07-IU-001 Thickness:

0.30" LTP No.:

230650 SummaryNo.:

230650 Material:

S/S Coverage Sketch No:

NA MO No.: 2200600726 I

Mtr l

a S/S Exam Area:

Lower T

Scale:

100%

CC/S Stainless Steel Exam Angle:

60' / 700 S/S =

Cast Stainless Steel L

CASS = Cast Stainless Steel (Sketch Resized for Relief Request)

Flow Exam Coverage = 100% for 180" of weld length.

~Pipe Exam Coverage = 50% for 180* of weld length, due to integral attachment on pipe side.

Far side of weld examined in. this area as per single sided'access rules - No coverage credit taken.

Coverage Calc Exam

, oeg

-Ax Upst..... "100%

Ax Dnst 50%

Circ OW 75%

Circ CW 75%

Total:

300%

.TotalI/4:

37 Page 20 of 20

v t e Letter Sequence Response to RAI
TAC:ME4220, (Open) TAC:ME4221, (Open) TAC:ME4222, (Open) TAC:ME4223, (Open)
Initiation Request Acceptance Administration Questions 13 October 2010 Answers 16 December 2010 Results Approval... Other: ML110910446
MONTHYEAR2010-06-30 [Table View]

ML103550157

Text

SUBJECT:

REFERENCES:

Attachment:

Enclosures:

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