ML20050E266

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Forwards Request for Relief from ASME Boiler & Pressure Vessel Code Section XI 1974 Edition,Including Addenda Through Summer 1975,for Preservice & Inservice Insp Program of Certain Class 2 Circumferential Butt Welds
ML20050E266
Person / Time
Site: Catawba  Duke Energy icon.png
Issue date: 04/05/1982
From: Parker W
DUKE POWER CO.
To: Adensam E, Harold Denton
Office of Nuclear Reactor Regulation
References
CN-1-002, CN-1-2, NUDOCS 8204130171
Download: ML20050E266 (5)
v • d • e


Text

{{#Wiki_filter:, .- _ s' l l DUKE POWER COMPANY Powza Butt.nswo 422 Sourn Cucacu Srazer, CnARIDTTE, N. C. asa4a WI L LI AM O. PA R K E R, J R. v.c, par.' '"' 7c4 Svtase Paoouction 4dl5,MM - 75"'*o * *:373 

                                                                                                                     ^"'.'4o s 3 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation                           m      RECEIVED              ,

U. S. Nuclear Regulatory Commission ( g jgg 7 Washington, D. C. 20555 --3

s susmaiis Tec Attention: Ms. E. G. Adensam, Chief '

Licensing Branch No. 4 ., 

                                                                            ,-f I

y & Re: Catawba Nuclear Station Units 1 and 2 Docket Nos. 50-413 and 50-414 Preservice and Inservice Inspection Program

Dear Mr. Denton:

Please find attached a request for relief from a requirement of the ASME Code for certain Class 2 circumferential butt welds for Catawba's Pr eservice and Inservice Inspection Program. Ver truly yours, s / a- (0 , L<. William O. Parker, Jr. RWO/php Attachment cc: Mr. James P. O'Reilly, Regional Administrator l U. S. Nuclear Regulatory Commission, Region II l Mr. P. K. Van Doorn NRC Resident Inspector Catawba Nuclear Station Mr. Robert Cuild, Esq. l Palmetto Alliance i l l 6' \ 8204130171 820405 gDRADOCK 05000413 PDR

Serial No. CN-1-002 Page 1 of 2 1 DUKE POWER COMPANY Request for Relief from Inservice Inspection Requirement Station: Catawba Nuclear Station Unit: #1 and #2 Reference Code: ASME Boiler and Pressure Vessel Code Section XI 1974 Edition including Addenda through Summer 1975. I. Component for which exemption is requested:

a. Name and Identification Number:

Main Steam Piping. First elbow weld off the top of each generator. See Attachment 1 for complete list of assemblies and welds,

b. Function:

Main Steam Pressure Boundary

c. ASME Section III Code Class:

Class 2

d. Valve Category:

N/A II. Reference code requirement that has been determined to be impractical: Table IWC-2600 Item #C2.1 requires volumetric examination for circumfer-ential butt welds. Table IWC-2520 examination category C-G requires that 50% of the total number of circumferential butt welds at structural discontinuities be examined. Radiography cannot be performed for inservice inspection due to accessibility. III. Basis for requesting relief:

a. Material - SA-106C  !
b. Estimate of extent of preservice examination which could be performed -

0%.

c. Original fabrication examination - magnetic particle inspection is performed on the outside surface and radiography is performed on the entire weld volume.

Scrial No. CN-1-002 Page 2 of 2 DUKE POWER COMPANY Request for Relief from l Inservice Inspection Requirement i III. Basis for requesting relief (cont'd):

d. Measures which would be required to make the welds able to be inspected - the guard pipe which makes the process pipe welds inaccessible would have to be removed.
e. Reference drawings - CN-1491-SM002 CN-1491-SH003
.                                             CN-1491-SM004 IV. Alternate examination:

There are no alternate examinations that can be performed due to the inaccessibility of the welds. V. Implementation schedule: The fabrication radiography records will be used in lieu of the onsite preservice inspection examination. d i 

                                 , _ - . . _                       _   , _ . - _ . . ~ , _ _ _ _
  • Requsst for Ralief CN-1-002 Attachment #1 The following is a list of circumferential butt welds for which volumetric examination has been determined to be impractical:

i Assembly Weld Number Size 1 i A Generator: CT-SM-1A-C 32" Main Steam B Generator: CT-SM-1B-C 32" Main Steam C Generator: CT-SM-1C-C 32" Main Steam D Generator: CT-SM-ID-C 32" Main Steam + a l l l 'l i 4 

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