ML20081C148

Deficiency Rept,Item 115 Re Possible Impingement of Essential Piping During Pipe Break.Initially Reported on 840124.Sweep Paths & Jet Impingement Zones Will Be Reevaluated & Pipe Break Locations Reassessed

ML20081C148
Person / Time
Site:	Fermi
Issue date:	02/25/1984
From:	Wells D DETROIT EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
115, QA-84-325, NUDOCS 8403120155
Download: ML20081C148 (2)

Text

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o f)/H0 Donald A. Wells e g[ Manager-Quality Assurance ) f Edison E'n!N>e Fe bruary 25, 1984 QA-84-325 Mr. James G. Keppler, Regional Administrator Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Subject:

Report of 10CFR50.55(e) Item on Possible Impingement of Essential Piping During Pipe Break (#115)

Dear Mr. Keppler:

On January 24, 1984, Detroit Edisoc's Mr. W.R. Wingfield, Quality Engineer - Construction Quality Assurance telephoned Mr. M. Jordan of NRC Region III to report on possible impingement of essential piping during pipe break at the Fermi 2 site.

As a result of ongoing design and construction activities since the original pipe break protection design, soue cocponents and structures may have been installed in the pipe " sweep" and jet impingement zones.

Additionally, potential pipe break locations may have been shifted, due to as-built configurations. A review is in process, to assure compliance with criteria.

The review and plan currently includes:

1. Reassessment of the pipe break location, utilizing the approved Fermi 2 Design Criteria, with consideration of applying the newer NRC Criteria BTP-MEB 3-1.

2. Re-evaluation of the " sweep paths" and jet . impingement zones.

3. Conduct an as-built survey to identify components and structures required for safe shutdown located in the " sweep path" and jet impingement zones.

4. Corrective actions, if required, will be taken to assure safe shutdown of the plant.

8403120155 840225 PDR ADOCK GS000341-S PM MAR 51934 sr.M N

g*.

Mr. James.G. Keppler, Regional Administrator February 25, 1984

.QA-84-325 Page 2

.5. Project guidelines are being developed to insure future compliance with the established pipe break design criteria.

Another report oa this item, either interim or final, will be sent when further information is available. If you have questions concerning this matter, please contact Mr. G.M. Trahey, Assistant Director - Project Quality Assurance.

Very truly yours, e

cc: Mr. Richard DeYoung, Director Of fice of ' Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C.- 20555 Mr. Paul Byron, Senior Resident Inspector U. S. Nuclear Regulatory Commission 6450 North Dixie Highway Newport, Michigan 48166

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