ML20084C244

Interim Deficiency Rept Item 120 Re Nps,Inc Change of Part Sizes of Pipe Support Components,Utilizing Same Part Number. Initially Reported on 840319.Design Calculations Reviewed. Field Investigation Requested.Next Rept by 840514

ML20084C244
Person / Time
Site:	Fermi
Issue date:	04/19/1984
From:	Wells D DETROIT EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
120, EF2-G8253, NUDOCS 8404270171
Download: ML20084C244 (2)

Text

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.y 0 Donald A. Wells b qf N%i*E?d'O^~*"

2s ai3 a April 19, 1984 EF2-68253 Mr.. James G. Keppler

-Regional Administrator Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Reference:

Fermi 2 NRC Docket No. 50-341

Subject:

Interim Report of 10CFR50.55(e) Item #120 Concerning N.P.S. INC. Change of Part Sizes of Pipe Support Components, Utilizing the Same Part Number i

[

On March 19,_1984, Detroit Edison's Mr. L. P.'Bregni, Engineer-Licensing telephoned Mr. R. C. Knop of'the NRC Region III to report.that N.P.S. INC. had changed some part sizes of pipe support components in their catalog while retaining the'same part identification number. Sufficient information is.not'available at this time.for a definitive' report _to-be submitted; therefore, this'~ interim report

.concerning the pipe support' components: has been prepared to provide the current statusdof this deficiency.

Description of Deficiency. ,

Detroit Edison has . discovered that NPS ~ Industries (NPSI) has supplied ~ dif ferent sizes of. pipe support components with .the same part number to the ' Fermi 2 site. -This resulted.when! ,

NPSI . changed the dimensions of parts _ but retained the ~ same part number. . Some ' of these ' component parts ; have been installed ~in the' plant. Because of.the-chang'e in physical

. dimensions, actual parts received.and-installed may have lower load capacities than L the design requires. -

8404270171 840419

-PDR ADOCK 05000341 S> _ , PDR u fp

, APR23334

F Mr. James G. Keppler April 19, 1984 EF2-68253 Page 2

. Analysis of Safety Implications-Pipe supports with the subject parts may have lower load capacities'than the design requires. If these supports are used in safety-related applications (i.e., safety--

related systems and. Seism.ic Category II over I applications),

this condition may~ result in support failure prior-to the support reaching its design limits. This situation could cause damage to safety-related systems.

Corrective Action The following act' ions are currently being pursued relevant to this deficiency:

1. Identify all NPSI pipe support components with significant engineering changes.

2. -Identify pipe supports that have used .these components by reviewing available~ support documentation.

3. Review the design calculations and request a field investigation for those pipe supports not conforming to the design.

Stone and-Webster Michigan, Inc.-(SWMI).has performed a

- preliminary evaluationLof-the deficiency and prepared a report which will be used . in thei final analysis. Based on the results of this analysis, final corrective actions will be' determined to resolve this deficiency. In1 addition, we are' evaluating this case:to determine if the existing procurement process = requires modification.-'A/ definitive-report on this Litem will be submitted on May 14, 1984. If Lyou have any questions - concerning this matter, please contact Mr. Lewis P.LBregnit (313-586-5083).

Sincerely,

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c c a . ' Mr . --- P . ' M . By r'on Mr. , R. nC. DeYoung -

Mr. R. C. Knop

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