View source for CPSES-200502474, Relief Request C-1 to the Unit 2 Inservice Inspection Program Plan from the 1998 Edition of ASME Code, Section XI, Through 2000 Addenda (Interval Start Date - August 3, 2004, Second Interval)

{{Adams
| number = ML053430215
| issue date = 12/02/2005
| title = Relief Request C-1 to the Unit 2 Inservice Inspection Program Plan from the 1998 Edition of ASME Code, Section XI, Through 2000 Addenda (Interval Start Date - August 3, 2004, Second Interval)
| author name = Blevins M, Madden F
| author affiliation = TXU Generation Co, LP, TXU Power
| addressee name = 
| addressee affiliation = NRC/Document Control Desk, NRC/NRR
| docket = 05000446
| license number = 
| contact person = 
| case reference number = CPSES-200502474, TXX-05203
| document type = Inservice/Preservice Inspection and Test Report, Letter type:CPSES
| page count = 8
| project = 
| stage = Request
}}

=Text=
{{#Wiki_filter:;. I                                                                                           @          TX.U Power TXU Power            Mike Blevins Comanche Peak Steam  Senior Vice President &
Electric Station     Chief Nuclear Officer P.O. Box 1002 (EO1)
Glen Rose, TX 76043                                                                     Ref: 10 CFR 50.55a(g)(5)(iii)
Tel: 254 897 5209 Fax: 254 897 6652 mike.blevins~txu.com CPSES-200502474 Log # TXX-05203 File# 10010 December 2, 2005 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

==SUBJECT:==
COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)
DOCKET NO. 50-446 RELIEF REQUEST C-I TO THE UNIT 2 INSERVICE INSPECTION (ISI) PROGRAM PLAN FROM THE 1998 EDITION OF ASME CODE, SECTION XI, THROUGH 2000 ADDENDA (INTERVAL START DATE - AUGUST 3,2004, SECOND INTERVAL)
TXU Generation Company LP (hereafter TXU Power) has determined that certain inspection requirements of ASME Section XI are impractical due to physical interferences and is requesting relief pursuant to 10 CFR 50.55a(g)(5)(iii).
TXU Power requests approval of the proposed Relief Request (RR) by the NRC staff.
The attached RR is for a component that did not meet the examination coverage criteria of ASME Subsection IWC-2500. TXU Power has reviewed the inspection documentation and determined that the high percentage of examination volume completed and the lack of any recordable indications establishes a high level of confidence in the continued structural integrity of the component.
A4ti7 A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway
* Comanche Peak
* Diablo Canyon
* Palo Verde
* South Texas Project s Wolf Creek

TXX-05203 Page 2 of 2 This communication contains no new licensing basis commitments regarding Comanche Peak Steam Electric Station (CPSES) Unit 2.
TXU Power requests approval of this relief request by December 1, 2006. The approval date was administratively selected to allow for NRC review. If you have any questions or need additional information regarding this matter, please feel free to contact Jack Hicks at (254) 897-6725.
Sincerely, TXU Generation Company LP By:    TXU Generation Management Company LLC Its General Partner Mike Blevins By:         ?)1{2'         -
ed W. Madden Director, Regulatory Affairs JCH Attachment c-      B. S. Mallet, Region IV M. C. Thadani, NRR Resident Inspectors, CPSES T. Parks, Chief Inspector, TDLR

Attachment to TXX-05203 Page I of 6 TXU Power Comanche Peak Steam Electric Station (CPSES), Unit 2 Second 10-Year Interval Relief Request C-1 Proposed Alternative in Accordance with 10 CFR 50.55a(g)(5)(iii)
Inservice Inspection Impracticality I. System/Component for Which Relief is Requested:
Excess Letdown Heat Exchanger, Head to Flange Weld (TCX-2-1 110-1)
II. Code Requirement for Which Relief is Requested:
At the time of the examination, CPSES Unit 2 was required to perform inservice examination of selected welds in accordance with the requirements of 10 CFR 50.55a, and ASME Code, Section XI, 1998 Edition through 2000 Addenda. The Code invokes the examination volume requirements of Figure IWC-2500- 1.
The subject weld is a full penetration weld and requires 100% volumetric examination of the head to shell weld per Table IWC-2500-1, Examination Category C-A, Item No. C1.20.
III. Impracticality of Compliance:
Interferences from the heat exchanger inlet and outlet nozzles and from the flange taper precluded ultrasonic examination of the volume required by Figure IWC-2500-1. Approximately 25% of the required weld volume did not receive the full code required examination volume. The examination included axial and circumferential scans in both directions. Examination coverage was 100%
circumferentially in both directions and approximately 50% in both axial directions. Refer to attached pages 3 through 6 for weld location and examination area configuration for weld TCX 1I10-1.
There were no recordable indications identified by the volumetric examination performed on the accessible portion of the weld volume.
IV. Burden Caused by Compliance:
The examination coverage is limited by physical interferences from the heat exchanger inlet and outlet nozzles and from the flange taper as indicated in the attached pages. These conditions make 100% examination coverage impractical for this weld. In order to gain access to this weld for examination purposes, the heat exchanger would require a design modification. Imposition of this requirement would be a significant burden to TXU Power.

Attachment to TXX-05203 Page 2 of 6 TXU Power Comanche Peak Steam Electric Station (CPSES), Unit 2 Second 10-Year Interval Relief Request C-1 (continued)
Proposed Alternative in Accordance with 10 CFR 50.55a(g)(5)(iii)
Inservice Inspection Impracticality V. Proposed Alternative and Basis for Use:
There are no proposed alternatives. TXU Power has examined a significant portion of the weld, obtaining approximately 75% coverage of the weld.
The subject weld was examined to the maximum extent possible. Based on the high percentage of the examination volume completed and the lack of any reportable indications, there is a high level of confidence in the continued structural integrity of the weld. There is no anticipated impact upon the overall plant quality and safety and the granting of the relief should not jeopardize the health and safety of the public.
VI. Duration of Proposed Alternative:
This relief is requested for the Comanche Peak Steam Electric Station Unit 2 second interval.
VII. Precedent:
: 1)     Comanche Peak Unit 2 (Reference SER dated December 28, 1995, TAC No. M93334)

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NOTES:                                 DESCRIPTIONt CS EXCESS LETDOWN HX         TU ELECTR IC (TUBESIDE) .750-OSA-240 (SHELLSIDE).322x/SA-106                  CPSES      UNIT            2 INSERVICE INSPECTION LOCATION ISOMETRIC I
APPROVAL:      f sw          a'      I  ______       ___-_-__            _ _ TCX I10 IREV. I    1   09-01-94 x-O^s^.
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PDI                                                             Calibration Data Sheet                                                                                                4-q O00 Plant/Unit                COMANCHE UNIT 2            Data Sheet #         8UT12                          I   -    -   I                         _~~~            I Company                        WESDYNE               Page              of     3                . 6If    -I--I                                  _1 -rI____                              >.
Comp/System              cS EXCESS LEToowN HX                                                             I            I                       _.          I Procedure No.                  TX-ISI-214            Cal. Checks             Time                         I            I                        _ _ __ _ _I Rev/Chng. No.                    3 / NIA             Initial Calib.          0912                         I            I - -                    _~~                 . . .}sX              Wo Cal. Block No.                   TBX-08               Initial Calib. Date 04/02/05                        I            I I                              _W          III Cal. Block Temp. 63F Comp.Temp. 770F                  Intermediate            N/A                         6El Therm S/N                       TU 2361               Intermediate            N/A                                                               _ F_-I I'I             I I IT'___
Size            8.0"     Sch. 140/ 812' "T       Final Calib.             1423 EFerritic                   lXJ Austenitic        Final Calib. Date 04/02/05 Each Major CRT Div. =               .47 1.27"                                                        Search Unit #1                               Search Unit #2 Cal.Direction            Axial      Circ. X Both                 Couplant          Manufacturer                      KBA               Manufacturer:            MEGASONICS Scan Area:                 I to Weld                 Type:           ULTRAGEL II   Serial No.:          0145RV      Freg.:2.25 MHz     Serial No.:        P0520      Freg.:2.25 MR PI to Weld                 Batch:            03125      Size:              .375" Shape:        ROUND        Size: 2 (0.14x0.30) Shape:          RECT.
Exam Anqle: 45*            Model:     MSWQC         Exam Angle:        70' Model:        CGD Recordable                       Measured Angle:                     45'             Measured Angle:                  70*
Access        Indications          Exam Sens. Wedge Style:                    MSWQC               Wedge Style:               INTEGRAL Examination Area/Weld                          Yes      No Geom                                 Search Unit Cable                                   Search Unittable TCX-2-1 110-1                        1-SIDED            X                     . Type:                       RG-174                  Type:                 2 (RG-174)
                                                     -                             Length: 6_            No. of Connecters     0       Length:      6     No. of Connecters       0
                                                    . .-                                      Instrument Settings                                  Instrument Settings
_                          Make/Model:                KBA / USN-52R            Make/Model:                USN-52R Remarks/Reasons for Inco mplete Scan(s)                                            Serial No:                     009404               Serial No:                  009404 Delay:      5.613 ps Range:             4.776"      Delay:       4.765 us Range:          2.7"
* EXAM SENSITIVITY 45-*47.6 dB /70' RL 60.6 dB                                Mu CalNel: .1239 ps Pulser:            SINGLE M't CaWel: .2301 ps Pulser:                DUAL 25% NOT EXAMINED DU E TO NOZZLES. SEE PSI DATA.                                Damping: 1000 () Reject:                  0%        Damping: 1000 0 Reject:               0%
NOTE: LOW AMP. ID GE OMETRY ON CIRC. SCAN FROM DIVIDER                        Rep. Rate: HIGH Freq.:                 2-8 MHz Rep. Rate: HIGH Freq.:                  2-8  MHz PLATE, VERIFIED ON MekNU)iACTURER DRAWING.                                    Filter:           FIXED Mode:         FULLWAVE Filler:              FIXED   Mode:     FULLWAVE Examiners: PAUL BLECl-                                      11 Date Ivel         04/02/05 Reference Sensitivity (Sens.)                       Reference Sensitivity (Sens.)
Axial:        25.6 dB Circ.           31.6dB        Axial:        54.6 dB Circ.          N/A Level       N/A Date N/A           SDH Sensitivity:                   N/A                DH Sensitivity:              NMA N/ARei we :I Reviewer:                     goK  an~~                          Date             FtFurther Evaluation Required', Yes            No Tt   FJecttle ltmkIm/ Date                                                                                                   1.eI fit Reiew I Date Aad'91 6                          r       4hlor                                                                                                     4/q/elc~Sr c-7A],.-         1.5b t(;-

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PROFILE OF THE EXAMINATION                                                                                                      12 9
!EPORT NO.                     8UT12                   STATION                    COMANCHE PEAK                          UNIT       2        PAGE        7.      OF       3         " 8 ff 1-011, a
iYSTEM      CS EXCESS LETDOWN HX   COMPONENT            HEAD TO FLANGE          DRAWING NO.                  TCX-2-1110                     IDENT NO.                  1               0 PROFILE SECTION                                                                                                    f-A DIAMETER     8.0"      WELD LENGTH         25.2"       CROWN WIDTH           1.2"      CROWN HEIGHT          0.1"          LONG SEAM LOCATION(S)                       N/A 0
CENTERLINE WELD HEAD                                                                       FLANGE
                                      .76"        .76"       .76"      .76"         .84'     .80'       .90"      1.1"         1.3"
                                     + 1n2      . 1"       4112"       TOE          CIL      TOE
* 12"     + 1"
* 112' UPSTREAM           FLOW          DOWNSTREAM      MEASUREMENTS START AT CIL OF THE WELD, THEN TOE OF WELD AND THEN liT FROM TOE. *1" AND .1 lIr ON BOTH SIDE OFWELD ASAPPLICABLE PROFILE EXAM COMMENTS PROFILE TAKEN AT 45S COVERAGE ACHIEVED SECTION XI        x       RISK INFORMED                       AUGMENTED                       PREVIOUS DATA REVIEWED                            YES         TYPE       UT EXAMINER           Paul S. Blecha                            DATE     04102105       EXAMINER    -         _        ///x                                  DATE         /
REVIEWER                $Z         5?                         DATE                   REVIEWER                                                             DATE     e      ./Q?
cT. 744        u-/7dY.5-

I Attachment to TXX-05203 Page 6 of 6 WESTINGHOUSE NUCLEAR SERVICE DIVISION INSPECTION SERVICES LIMITATION TO EXAMINATION PLANT     COcrnAkCHE      1Rk      -   UNIT         a_ _       SKETCH          TCX    -      ' //O      P Ji. 0 SYSTICOMP   ExCeSm LETfOptJ      PEAT         rcmiyg          PROCEDURE        TX'SI pOC            rE  I EXAMINER   AA4.           1 ei                                DATE          a   -. c   -_0 0 EE3                I     I RELATED TO:    U/T.    .X.P/T          M/T             VIT          ITEMIS3    L)ELO       I PROVIDE GENERAL INFORMATION TO DESCRIBE APPROXIMATE SIZE. LOCATION AND TYPE OF LIMITATION.
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                       -DIRECTION 7 IOR0 R."5J'                                    !oI                       1                     30 SURF.'
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