ML20084B165

Part 21 Rept Re Seam Closure Welds on Expansion Joints for Fuel Transfer Line Stressed Beyond ASME Code Limits. Reported Per 10CFR50.55(e) by Util.Mods Made to Add Gusset Plates to End Plate of Expansion Joint

ML20084B165
Person / Time
Site:	Seabrook
Issue date:	04/19/1984
From:	Kreider H UNITED ENGINEERS & CONSTRUCTORS, INC.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
REF-PT21-84-216-000 PT21-84-216, PT21-84-216-000, SBU-87243, NUDOCS 8404260090
Download: ML20084B165 (3)

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Philadelphia, PA 1910: ((,007[,

April 19, 1984 SBU 87243 File: 9.1, LCC No Response Required Director -

Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555

Dear Sir:

Subj ect: 10CFR21 - Final Report of a Defect Related to Public Service Company of New Hampshire Seabrook Station - Units 1 and 2 This is to inform you of the corrective action taken for,a defect related to the adequacy of the closure welds for the Fuel Transfer Tube for the ,

Seabrook Station. While this defect has been reported by the Public Service Company of New Hampshire in accordance with 10CFR50.55(e), we are providing this 10CFR21 Report to assure that the commission has been adequately informed.

Details of our report are attached. -

Very truly yours, H. . reider Vice President - Power '

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NAME AND ADDRESS OF THE INDIVIDUAL OR INDIVIDUALS INFORMING THE COMMISSION:

H. G., raider, Vice President - Power United Engineers &-Constructors Inc.

30 South 17th Street Post Office Box 8223 Philadelphia,,PA 19101

,, IDENTIFICATION OF THE-FACILITY, THE ACTIVITY, OR THE BASIC COMPONENT SUPPLIED FOR

,s'?* . SUCUzFACILITY OR SUCH ACITVITY WITHIN THE UNITED STATES WHICH FAILS TO COMPLY OR f 74 N CONii1NS A DEFECr:

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N Puh Servf!c Compan'y of New Hampshire, Seabrook Station. . Design of the welds oythe expansion joints for the Fuel Transfer Tube.

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)ID'NTIFICATION OF;THE FIRM CONSTRUCTING THE FACILTY.OR SUPPLYING THE BASIC COMPONENT'WHICH FAILS TO COMPLY OR CONTAINS A DEFECT:

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NATURE OF THE DEFECK OR. FAILURE TO COMPLY AND-THE SAFETY HAZARD WHICH'.IS CREATED ~

OR COULD BE CREATED BY SUCH DEFECT OR FAILURE TO COMPLY:

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The. seam closure welds on . expansion joints for ' the Fuel Transfer Tube have been found to be stressed beyond code limits under design conditions.

This'_was discovered during investigation of~a similar condition for.the Containment; Spray System Encapsulation _ Vessels.

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IN CASE OF A BASIC COMPONENT WHICH CONTAINS A DEFECT OR FAILS TO COMPLY, THE C NUMBER AND LOCATION OF ALL SUCH COMPONENTS IN USE AT, SUPPLIED FOR, OR BEING SUPPLIED THIS PART: FOR ONE OR MORE FACILITIES OR ACTIVITIES SUBJECT TO THE REGULATIONS IN

'e The specific ASME III Code requirements narrowed down the investigation to the Washington Public Power Supply System (WNP-1) plant. A review of similar designs in WNP-1 revealed that no reportable deficiency exists in that plant. This defect applies only to the Seabrook Station, Units 1 and 2. ,

E THE CORRECTIVE ACTION WHICH HAS BEEN, IS BEING, OR WILL BE TAKEN: THE NAME OF s THE INDIVIDUAL OR ORGANIZATION RESPONSIBLE FOR THE ACTION: AND THE LENGTH OF TIME THAT HAS BEEN OR WILL BE TAKEN TO COMPLETE THE ACTION: {;

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Modifications will be made to add gusset plates to the end plate of the 8 expansion joints in order to withstand the loading. United Engineers & y Constructors Inc. will be responsible for these modifications. The i design of the modifications will be completed by April 30, 1984. t ANY ADVICE RELATED TO THE DEFECT OR FAILURE TO COMPLY ABOUT THE FACILITY, E s

ACTIVITY OR BASIC COMPONENT THAT HAS BEEN, IS BEING, OR WILL BE GIVEN TO PURCHASERS OR LICENSEES: @

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Public Service Company of New Hampshire has reported the defect E under the provisions of 10CFR50.55(e).

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