ML20213D448

Responds to IE Bulletin 86-003, Potential Failure of Multiple ECCS Pumps Due to Single Failure of Air-Operated Valve in Min Flow Recirculation Line. No Subj Valves Used or Single Failure Mechanisms Found in Min Flow Controls

ML20213D448
Person / Time
Site:	Fermi
Issue date:	11/07/1986
From:	Agosti F DETROIT EDISON CO., DUQUESNE LIGHT CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
IEB-86-003, IEB-86-3, VP-86-0158, VP-86-158, NUDOCS 8611120106
Download: ML20213D448 (2)

Text

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November 7, 1986 VP-86-0158 Mr. James G. Keppler Regional Administrator Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

References:

(1)

Fermi 2 NRC Docket No. 50-341 NRC License No. NPF-43 (2)

NRC IE Bulletin 86-03

" Potential Failure of Multiple ECCS Pumps Due to Single Failure of Air-Operated Valve in Minimum Flow Recirculation Line", dated October 8, 1986

Subject:

Resconse to NRC IE Bulletin 86-03 This letter provides Detroit Edison's response to Reference 2.

NRC IE Bulletin 86-03 requested Detroit Edison to evaluate Fermi 2's vulnerability in the miniraum flow recirculation line of any ECCS pumps that could cause a failure of more than one ECCS train.

There are no air-operated valves in the ECCS minimum flow recirculation system capable of causing ECCS pump failures at Fermi 2.

In addition, no single failure mechanisms have been found in the minimum flow controls or valves, which would lead to a common mode failure of the safety injection Systems.

This is Detroit Edison's final report on this item.

If you have any questions concerning this matter, please contact Mr. Frank Sondgeroth, at (313) 586-5083.

Sincerely, cca Mr. W. G. Rogers

't--- 8 4 Mr. J. J. Stefano Mr. R. C. DeYoung

(.d h USNRC Document Control Desk Washington, D. C. 20555

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Mr. James G. Keppler November 7, 1986 VP-86-0158 Page 2 I, FRANK E. AGOSTI, do hereby affirm that the foregoing statements are based on facts and circumstances which are true and accurate to the best of my knowledge and belief.

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FRANK E. AGOSTI Vice President Nuclear Operations

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On this

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1986, before me personally appeared Frank E. Agosti, being first duly sworn and says that he executed the foregoing as his free act and deed.

i Notary Public MA3 CIA DUCK Notary Public. Washtenaw County, MI My Commission hpires Dec.28,1987 d

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