GO2-83-838, Final Deficiency Rept 175 Re Reverification on Wbg/Bovee Crail Radiographs Representing Welds Made by Previous Mechanical Contractor.Corrective Actions Described.Actions Satisfactory

Final Deficiency Rept 175 Re Reverification on Wbg/Bovee Crail Radiographs Representing Welds Made by Previous Mechanical Contractor.Corrective Actions Described.Actions Satisfactory

ML20078B556
Person / Time
Site:	Columbia
Issue date:	09/15/1983
From:	Carlisle C WASHINGTON PUBLIC POWER SUPPLY SYSTEM
To:	Martin J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
10CFR-050.55E, 10CFR-50.55E, 175, GO2-83-838, NUDOCS 8309270140
Download: ML20078B556 (4)

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I:20EIl?Ety Washington Public Power Supply System IM P.O. Box 968 3000GeorgeWashingtonWay Richland, Washington 99352 (509)372-5000 Docket 50-397 3 SPI 9(py, September 15, 1983 M..h' t; y; .

G02-83-838 Mr. J. B. Martin Regional Administrator U.S. Nuclear Regulatory Commission Region V

1450 Maria Lane, Suite 210 Walnut Creek, California 94596

Subject:

NUCLEAR PROJECT NO. 2 10CFR50.55(e) REPORTABLE CONDITION #175 WBG RADIOGRAPHS

Reference:

Letter G02-82-727, dated September 1, 1982, R.G. Matlock to R.H. Engelken.

The referenced lctter transmitted our final report on the subject 10CFR 50.55(e) issue. Subsequent to that report, additional concerns were identified resulting in our commitment as noted in NRC Inspection Report 50-397/83-22 to perform additional film quality reviews. These reviews are now complete. The results are shown in Attachment 1. As noted in the attachment, the Supply System is committing to re-radiographing two welds no later than the first refueling outage due to these welds presently being inaccessible.

If you have any questions, contact Roger Johnson at (509) 377-2501, extension 2712.

C. .'

Program Director, WNP-2 RTJ/kd

Attachment:

As stated cc: W.S. Chin, BPA N.D. Lewis, EFSEC A. Toth, NRC Resident Inspector

Docuemnt Control Desk, NRC 8309270140 830915 PDR ADOCH 05000397 I!

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ATTACHMENT 1 WASHINGTON PUBLIC POWER SUPPLY SYSTEM 1 NUCLEAR PROJECT N0. 2 DOCKET N0. 50-397 LICENSE N0. CPPR-93 10CFR50.55(e) CONDITION #175 WBG RADIOGRAPHS FINAL REPORT Introduction

'The Supply System's final report on reverification of WBG/Sovee Crail radio-graphs dated September 1, 1982, described the program utilized for review of the radiographs representing 2690 welds made by the previous mechanical contractor.

As described in the final report, the review program consisted of two (2)

' phases. During Phase 1, radiographs representing 1373 welds were interpreted for film quality, technique and weld quality and so documented on radiographic review sheets. The data generated during Phase 1 of the review was analyzed and a justification was presented to modify the review program for evaluating fila quality and technique. It was decided that minor film quality devia-tions need not be documented for the remaining 1317 welds requiring review.

j The Phase 2 review was performed under these guidelines.

l During May of 1983, WNP-2 project management elected to perform the review necessary for documenting minor film quality deviations of the radiographs representing the 1317 welds of Phase 2. This report describes that review.

Description of Review Program All of the original radiographs for the 1317 welds in Phase 2 were reviewed for minor film quality deviations and documented on the original Phase 2 radiographic review sheets. Radiographs which were deter.ained to have den-sity and/or geometric unsharpness deviationr exceeding ASAE code requirements

were reported on NCR's and dispositioned.

Results of the Review The results'of the review are summarized in Table No. 1. This data shows that 105 welds were rejected for minor film quality deviations. Twelve of these welds had been completely cut out because of isometric drawing revi-sions. Seventy-four (74) have been reshot and accepted without the need for weld repairs. Seventeen (17) welds are all ASME III/3 which only requires l surface NDE. All 17 welds have successfully passed the code required MT/PT examination. The remaining two are awaiting reshooting pending access to perform the required radiography.

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Attachment 1 j Page 2 of 3

. The two welds (BC/G 213 C 18 R-1 and BC/G 212 B18 R-1) which have not been re-radiographed are located on a flued-head assembly where total wall thick-ness prohibits double-wall radiography although it has been attempted several

times. In order to perform single-wall radiography, it would be necessary to disassemble valve MS-V-228 which is essential to ongoing system testing.

Existing radiographs taken in 12/77 for weld C-18 and B-18 exhibit a minimum density reading in the weld area of 1.90 and 2.00, respectively. For weld B-18 the -15% density factor is the only cause for rejection. Based on exper-ience factors from both Phase I and Phase II, where no additional weld de-fects have been discovered from re-radiographing 273 welds, it is safe to i assume no weld defects exist in these two welds. The Supply System commits to re-radiographing these two welds at the first available opportunity, but not later than the first refueling outage. It is on this basis this final report is submitted.

Summary and Conclusions The original intent of-the radiographic reverification program was to support the project quality reverification effort by providing assurance that the radiographic examinations of field welds in the piping systems installed by the previous mechanical contractor were satisfactory. The action taken l

described herein to complete this program provides this assurance.

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Attachraent i l Pag'e 3 of 3 1 8/30/83 l REVERIFICATION OF RADIOGRAPHS Number of Welds PHASE 1 PHASE 2

• TOTAL  %

l Welds Reviewed 1373 1317 1317 2690 100 Rejected Film Quality 243 3 105 352 13.10 i

Rejected Weld Quality 65 16 0 81 3.0 1

Accepted Welds 1065 1298 1212 2257 83.90 Accepted Reshots (Film Quality) 196 3 74(2) 273

) Remaining Reshots (Film Quality) 0 0 2(2) 2 Cutouts / Deletions (Film Quality)(1) 47 0 12(2) 59 1 NOTES: (1) Cutout of system by WBG/Bechtel can't be reshot.

(2) These items total 88 welds. The remaining 17 welds have been accepted on the basis of a surface exanination, either MT or PT, as allowed by ASME III, Class 3 code requirements.

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(*) Supplement to Phase 2 Reverification i

Table No. 1 J

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