ML19323F402
| ML19323F402 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 04/21/1980 |
| From: | Hines E DETROIT EDISON CO. |
| To: | Fiorelli G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML19323F398 | List: |
| References | |
| EF2-49-003, EF2-49-3, NUDOCS 8005280970 | |
| Download: ML19323F402 (3) | |
Text
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S April 21, 1980 eEdison =..,,
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Mr. G. Fiorelli, Chief Reactor Construction and Engineering Support Branch U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, Illinois 60137
Subject:
Additional Response to NRC Inspection Report 50-341/79-24.
Reference:
Letter from Mr. Fiorelli to Mr. Hines dated March 6,1980.
Dear Mr. Fiorelli:
Since your notification in the above referenced letter that our response to Item 79-24-03 in Inspection Report 50-341/79-24 was unacceptable, we have re-evaluated our position on this matter. The action Detroit Edison will take on this matter will be as described in the attached internal nemoramdum EF2-48,716 dated April 8,1980.
We trust this action satisfactorily answers the concerns noted in your report on this item. We will be glad to discuss any further concerns you may have.
Very truly yours, t
htA Vs EH/ HAW /pn Attachment cc: Mr. Victor Stello, Jr., Director Office of Inspection and Enforcement Division of Reactor Inspection Programs U.S. Nuclear Regulatory Commission Washington D.C.
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n Detroit Edison ENRICO FERMI UNIT 2 PROJECT ENGINEERING April 8, 1980 EF2 - 48716 To:
H. A. Walker Supervisor, Construction Q.A.
Fermi 1 Of fice Building
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/I D From:
W. F. Colbert Project Engineer - EF2 318 Engineering Construction-Troy
References:
1.
Site Quality Assurance Letter F2S80-450, dated March 19, 1980 2.
Staff Position Letter RC & ES Branch dated March 6, 1980 Subj ect :
MSIV Limit Switch Qualification As evidenced by the Staff reply to Edison's discussion of the l
appropriate level of qualification of the existing MSIV limit switches it is obvious that only a device which meets or exceeds the most stringent long term exposure to both steam and radiation environments uill adequately address the Staff's, requirements.
In addition, the Staff has elected to impose this env'ironmental requirement on the posi-
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tion indication limit switches in addition to the devices which pro-
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vide a logic input to the reactor trip system.
Engineering has independently verified that several other utilities have agreed to meet the NRC position with respect to the switch environmental requirement. Since the technical and political initia-tive has been lost, Edison reluctantly will provide upgraded switches l
to meet the NRC position. The switches will be procured by Edison l
Engineering from Namco. Model EA 740 switches which have been quali-l fled to an environment which has been judged acceptable by the Staf f l
will be purchased directly from the vendor and installed by the field.
l A copy of the environmental qualification test plan has been attached for your information, it might be desirable to forward this plan to the staff for their consideration.
7 9
Memo to:
April 8, 1980
~
H. A. Walker EF2 - 48716 Project Engineering believes this action should satisfactorily resolve the staf f concern resulting from the reference inspection report.
L. F. Wooden
/dk Attach.
cc w/o Attach.: R. W. Barr E. R. Bosetti T. H. Dickson L. G. Ferguson R. S. Lenart E. Lusis J. W. Nunley L. E. Schuerman Document Control i
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