ML20090H490
| ML20090H490 | |
| Person / Time | |
|---|---|
| Site: | Fermi  |
| Issue date: | 07/13/1984 |
| From: | Jens W DETROIT EDISON CO. |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 108, EF2-69281, NUDOCS 8407260321 | |
| Download: ML20090H490 (2) | |
Text
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Ame m-Wayne H. Jens a'
W,e Pre 1p M t Nxteat Operat:ons F
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. p on864 tw July 13, 1984 BF2-69281 i
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y-s Mr. James G.'Keppler Regional Administrator
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Region III~
.U.
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Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois J0137
Dear Mr. Keppler:
A' s
Reference:
(1) Fe'rdti 2g NRC Dacke r, Uo. 5 0--3 4'l i
,( 2 ), Letter, "D.
A. Wells to J.
G. Keppler
/
January 16, 1984, EF2-66491
/
~ S u'b'j e c t :
Final Evalcelt' ion of,10CFR50.55(e) Item 108, "RHR 4~160V_Swit'chgear Records" E
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Detroit Edison-has completed its investigation of Item 108
. and - has determined 't'he deficiency is 'not reportable under
..lCCFR5 0. 5 5 ( e ).
This# item involved missing installa' tion records for RHR 4160V switchgear.
To facilitate the con-
-struction and testing: schedule,. modifications were made to (the.RIIR switchgear to ensure conformance with design
- r,equirementsandresolvek[U'est{onsregardingthe indetermi-
.nate. quality of l the
- installation.7 ;During th.ese modifica-tionsi.it'was' discovered that the'RHR switchgear had not-
~
c been' installed in accordance-with the design requirements in that: leveling nuts-wereLused in conjunction with wedge
~~
anchors. :
~
Detroit Edison's'conclu'sion thrit this. deficiency is not
- reportable
- under 10CFR50.55(eli is based on design-calcula-
'gtion D.C.
2618. Revision A..-This assessment-' demonstrated thats-the original installation ~would meet all'~ design criteria withoiit I the ' modifications whicn were made to correct the<in.35 terminate condition.
Therefore, if this
- condition.were" t6 'have ' remained uncorrected, ~ it would not
~
C have ' adversely ~. affectedl'the" safe operation of the. plant.
A
~ copy of design,calcO1,ati6n-D.C. 2618 Revision A was
- + i.nformallyfprovid Q to Mr.
D.
R.
Ilunter of your. staff.
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- Mr.-James'G. Keppler July 13, 1984
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L EF2-69281 f],
Page 2
' The corrective action for the lack of installation records q=c on the RilR 4160V switchgear included the following:
a)
Modifications to the mounting of the affected switchgear.were made which resolved concerns about the. indeterminate quality of the installation.
'b)
Installation records were located and checked for l'
other safety-related electrical equipment in the RilR complex and. major electrical equipment in the Reactor / Auxiliary Building which utilize wedge type
~
anchor. bolts.
Installation records were found to be complete and -acceptable. -
c) LA review of design drawings indicated that no other anchor bolt installations were of a design that would allow l improper use of leveling nuts.
.The four RiiR 4160V 'switchgear mountings were found to be a unique design.
All deficiencies and corrective actions associated with this item are identified and -tracked in Nonconformance Report-83-1252 and Design. Change Notice DCN-10387.
.This is' Detroit Edison's'fina11 report on this item.
If you
- have-questions concerning this matter, please contact Mr. Lewis P. LBregni, (313) 586-5083.
Sincerely,
/
' cc:
Mr..P.
M.. Byron k g m.
Mr.
R.'C.
DeYoung Mr.-R.-C.
Knop o
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