ML19263B481

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Responds to NRC 781024 Ltr Re Violation Noted in IE Insp Rept 50-352/78-08 on 781004-05.Corrective Actions:Weld Fillet Size Increased to Meet Required Specifications for Certain Box Girder Joints
ML19263B481
Person / Time
Site: Limerick Constellation icon.png
Issue date: 11/22/1978
From: Boyer V
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To: Grier B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19263B473 List:
References
NUDOCS 7901180296
Download: ML19263B481 (2)


Text

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PHILADELPHIA ELECTRIC COMPANY 23O1 MARKET STREET PHILADELPHI A. PA.19101 (215) 841-4 5co wlCE PMtalOENT November 22, 1978 Mr. Boyce Grier, Director thited States Nuclear Regulatory Cor ission Office of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, PA 19406

Subject:

USNRC IE; I Letter dated October 24, 1978 Re: Investigation Report 50-352/78-08 Limerick Generating Station, Units No.1 and 2 File: QUAL 1-1-2 (358/78-08)

Dear Mr. Grier:

In response to the subject letter regarding an item identified during an investigation of construction activities authorized by NRC License Nos. CPPR-106 and 107 we transmit herewith the following:

Attachment 1 - Response to Appendix A " Notice of Violation" Should you have any questions concerning this item, we would be pleased to discuss them with you.

Sincerely,

/ l, ,i'f cy V. S. Boyer WJA:jem -

Attachment 19C 7901180 MA

Attachment I Resnonse to Item of Noncoroliance Violation Criterion IX, requires b part that, welding be accomplished in accordance with applicable criteria and other special requirements.

The Quality Assurance Program implementation described in the Limerick Generating Station PSAR Appendix D, requires in Paragraph D.6.3, that the Bechtel Procurement Department is responsible for inspections of procured items to assure compliance with the specification requirements.

Harnischfeger (P&H) drawing No. 28A13615, Sheet 1, Revision C, of the Reactor Building Crane, view BB and Detail "A" specifies that the weld joint between the tie-plates (Part No. 18) and the box girder be a 45o double-bevel-groove veld with a 3/8" prepared chamfer on each side.

Contrary to the above, it was determined that the reactor building crane tie-plate-to-box-girder-welds were fillet welds.

Resnonse

1) An inspection performed on 100% of the exterior welds by P&H, assisted by Bechtel Q.C. and Bechtel Field Welding, confirmed that the above noted welding deficiency was an isolated case.
2) P&H has reported that their calculations show that the veld fillet si::e must be increased to 9/16 inch fillet welds on both sides of plate No. 18. These fil.et l welds have been repaired using Bechtel welding procedure PI-A-LH structural. Tha completed inspection of these velds confir= that they meet the 9/16 inch dimensional require-ment.

Drawings are presently being revised by P&H to reflect the as-built conditions.

3) To prevent recurrence, the site Project Quality Control Instructions for receiving inspection (QCI-R-1.00) is currently being revised to include a supplement for use when inspection of AWS welding is involved. This supplement will be available for use on November 22, 1978.
4) Additionally, an inspection was made of some of the velded stiffners within the box girder of the crane. An evaluation of the results of this inspection is underway.

We anticipate that this evaluation will be completed shortly, and that any necessary repairs will be completed by April of 1979.

. I11 50-352 8-08