ML20198F704

Deficiency Rept SD-56 Re Tubeco Weld Radiographs.Initially Reported on 840618.Review of Tubeco Radiographs for QA Category I,Asme III Code Class 1,2 & 3 Welds Complete.Final Rept Will Be Provided by 851113

ML20198F704
Person / Time
Site:	Millstone
Issue date:	11/01/1985
From:	Opeka J, Sears C NORTHEAST NUCLEAR ENERGY CO., NORTHEAST UTILITIES
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
F0853A, F853A, SD-56, NUDOCS 8511140406
Download: ML20198F704 (3)

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HARTFORD CONNECTICUT 06141-0270 k k J (([,' C',2.,, ",'c~~~.]

7 (203) 665-5000 November 1,19S5 Docket No. 50-423 F0353A Dr. Thomas E. Murley Regional Administrator Region i U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, Pennsylvania 19406

References:

(1) T. T. Martin letter to W. G. Counsit, IE Inspection Report No. 50-423/33-14, dated November 22,1933.

(2) W. G. Counsil !ctter to T. T. Martin, A03651, dated December 22,1983.

(3) W. G. Counsit letter to T. T. Martin, F0454A, dated March 16,1934.

(4) W. G. Counsil letter to T. E. Murley, F0557A, dated June 18, 1984.

(5) W. G. Counsil letter to T. E. Murley, F0575A, dated September 28,1934.

(6) E. C. Wenzinger letter to W. G. Counsil, IE Inspection Report No. 50-423/84-20, dated December 21,1934.

(7) W. G. Counsil letter to R. W. Starostecki, A04566, dated January 18,1935.

(8) W. G. Counsil letter to T. E. Murley, F0666A, dated January 31,1985.

(9) 3. F. Opeka letter to T. E. Murley, F0690A, dated June 28,1985.

(10)J. F. Opeka letter to T. E. Murley, F0304 A, dated September 17,1935.

(11) 3. F. Opeka letter to B. 3. Youngblood, Bl'1710, dated September 18,1985.

(12) W. G. Counsil letter to T. E. Murley, Bi l 438, dated February 1,1985.

8511140406 851101 PDR ADOCK 05000423 iO S PDR f j,9

. .x (13) 3. F. Opeka letter to T. E. Murley, B11630, dated August 1, 1985.

(14) 3. F. Opeka letter to T. E. Murley, F0304A, dated September 17,1935.

Dear Dr. Murley:

Millstone Nuclear Power Station, Unit No. 3 Reporting of Potential Significant Deficiencies in Accordance with 10CFR50.55(e):

Tubeco Weld Radiographs (SD-56)

Potential deficiencies with Tubeco weld radiographs were first identified in a notice of violation in IE Inspection Report 50-423/83-14 (Reference (1)). The violation concerned potential film density violations and the placing of penetrameters in the weld. Northeast Nuclear Energy Company (NNECO) responded to this notice of violation and concluded that these were not technical problems or safety concerns (References (2) and (3)). However, a subsequent review uncovered three additional potential problems with Tubeco weld radiographs (undocumented linear indications, excessive geometric unsharpness and penetrameter identification numbers in the weld) which lead us to report a potential significant deficiency in the construction of Millstone Unit No. 3 as required by 10CFR50.55(e) (Reference (4)). We concluded that this was not a significant deficiency and that we believed Tubeco weld quality was adequate (Reference (5)).

In Reference (6), you requested that we revise our September 28, 1984 (Reference (5)) response to you based on information revealed during a subsequent, independent review of Tubeco weld radiographs by one of your inspectors.

In accordance with commitments made in References (7), (8), (9), (10), and (14),

NNECO hereby provides the following update summarized below with the latest estimated total weldment figures:

o NNECO has completed a 100% review of Tubeco Radiographs for QA Category I, ASME Ill Code Class 1,2 and 3 welds. A total of 2,185 weld radiographic film packages were reviewed, o 1,230 weldments radiographic film were rejected for technique, film quality and/or veld quality attributes, o 620 weld radicgraphs were rejected for film technique, but did not require further nondestructive examination to ensure code compliance, o 610 weldments required additional nondestructive examination to ensure code compliance.

o 467 weldments required volumetric NCE reexamination.

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. ..s o 143 weldments required surface NDE examination.

o 60 weldments have rejectable weld or base metal indications. 40 had rejectable radiographic indications. The remaining 20 weldments exhibited rejectable magnetic particle surface indications in the weld or adjacent base material.

o 8 additional weldments exhibited potential rejectable radiographic indications. These weldments were repaired without confirming if the indications were relevant or nonrelevant because of schedular constraints.

o A total of 30 weldments within the Containment Recirculating System (RSS) had either radiographic film and/or weld quality problems or radiographic film did not exist (Reference (11)).

NNECO and our architect / engineer, Stone and Webster Engineering Corporation, have nearly completed our evaluations and corrective actions concerning the deficiencies associated with Tubeco weld radiographs. Appropriate corrective actions as summarized above were taken to meet commitments to the ASME Code. All weldments with the exception of several RSS weldments embedded in the containment floor and one feedwater system weld (FWS-15-7-4-2 shop weld "C") were brought into compliance with ASME Code. Detailed information concerning the RSS weldments embedded into containment ficar was provided the NRC previously, Reference (11).

The one remaining feedwater system weld has.to have radiographic examinations completed. These evaluations are presentfy constrained by hot functional testing. As such, a final report will be provided upon completion of the feedwater system weld examination by November 13,1985.

Very truly yours, NORTHEAST NUCLEAR ENERGY COMPANY h .

J. F. Opeka '

Senior Vice President By: C. F. Sears Vice President cc: Mr. 3. M. Taylor, Director Division of Inspection and Enforcement i U.S. Nuclear Regulatory Commission Washington, D.C. 20535