ML20107L287: Difference between revisions

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=Text=
=Text=
{{#Wiki_filter:, .                  n .-- ,
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                                              - Yayne H. Jens ,
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1                  ,  IVice Prssident
- Yayne H. Jens,
                                                ? Nuclear Operations
IVice Prssident 1
                                                                            .~
? Nuclear Operations
~
.~
                                              - Fermb2
~
:.                  6400 North Dixie Hghway
- Fermb2 6400 North Dixie Hghway
* r              i             w No. port, uichigan 48iss                                 October .17,.1984 W            I             l l <ais> sesaiso                                         'EF2-70027 4-
:.i w No. port, uichigan 48iss October.17,.1984 rW I
'i l.                                                                                                                     ~
l l <ais> sesaiso
                  .                            ~Mr.EJames G. Keppler~                           .
'EF2-70027 4-
                                              ~: Regional' Administrator'                         4 Region.III                                               .
'i l.
                                                -U. S. Nuclear           Regulatory Commission
~
                                      ~
~Mr.EJames G. Keppler~
                                    .            1799 Roosevelt Road?
~: Regional' Administrator' 4
i~ Glen Ellyn, IL;60137                     ' ..
Region.III
~
-U. S. Nuclear Regulatory Commission 1799 Roosevelt Road?
i~ Glen Ellyn, IL;60137


==Dear'Mr.:==
==Dear'Mr.:==
Keppler:                                           s.
Keppler:
s.


==Reference:==
==Reference:==
                  '(1) Fermi 2           ~
'(1)
NRC Docket No. '50-341 (2) Letter, W. H. Jens to J. G. Keppler, July.16, 1984, EF2-69287
Fermi 2 NRC Docket No. '50-341
~
(2)
Letter, W. H. Jens to J. G. Keppler, July.16, 1984, EF2-69287


==Subject:==
==Subject:==
Interim Report.of 10CFR50.55(e) Item 129
Interim Report.of 10CFR50.55(e) Item 129
                                                                                " Lack of-Design Calculations for HVAC Duct Supports" On October 1, 1984, Detroit Edison's'Mr. J. E. Conen,.
" Lack of-Design Calculations for HVAC Duct Supports" On October 1, 1984, Detroit Edison's'Mr. J. E. Conen,.
Engineer-Licensing, telephoned Mr. R. Lerch of NRC Region III to provide additional information.regarding 10CFR50.55(e) Item 129, " Lack of Design Calculations for HVAC. Duct. Supports."
Engineer-Licensing, telephoned Mr. R. Lerch of NRC Region III to provide additional information.regarding 10CFR50.55(e) Item 129, " Lack of Design Calculations for HVAC. Duct. Supports."
Item 129 was originally reported in Reference (2).
Item 129 was originally reported in Reference (2).
h Reference (2) reported that detailed design calculations.for HVAC system ductwork and supports could not be-located. -At
h Reference (2) reported that detailed design calculations.for HVAC system ductwork and supports could not be-located. -At
                                                              ~
~
least one of the HVAC support designs examined was not rigid and,ntherefore, did not meet the rigid support assumption used in the ductwork seismic analysis. To resolve this issue, Detroit Edison committed to reanalyze the affected safety related HVAC ductwork supports.
least one of the HVAC support designs examined was not rigid and,ntherefore, did not meet the rigid support assumption used in the ductwork seismic analysis.
As part of this reanalysis, a sample of the ~HVAC supports was inspected to verify the as built drawings. Some of the hanger attachment points were found to be noticeably off the center of the base plates. An analysis of the impact of the off center . attachment is being performed.                     The results of this analysis'will be. included in Detroit Edison's final                                 .
To resolve this issue, Detroit Edison committed to reanalyze the affected safety related HVAC ductwork supports.
report of Item 129.
As part of this reanalysis, a sample of the ~HVAC supports was inspected to verify the as built drawings.
                                                                                                                                                -l 8411130477 841017 PDR ADOCK 05000341                                                                                     :
Some of the hanger attachment points were found to be noticeably off the center of the base plates.
S                              PDR                                                                     -
An analysis of the impact of the off center. attachment is being performed.
i OCT 2 61984       y
The results of this analysis'will be. included in Detroit Edison's final report of Item 129.
                                                                                                                                    .:c 4; 7
-l 8411130477 841017 PDR ADOCK 05000341 S
                                                                                                                              /[o
PDR i
OCT 2 61984 y
/[o
.:c 4; 7


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                            - Octobe r: 17,-1984 EF2-70027
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                            .Page 21 a                       Detroit Edison will provide another_ report-'on this' item, Jeither= interim or final,,when further information is'.
-e.
                            -available.     If you have questions concerning this matter, please . contact Mr. Lewis ' Bregni, ( 313) 586-5083.
e Mr.JJames G. Kepple'r~
Sincerely, cc:     P.-M. Byron j~ %    .
- Octobe r: 17,-1984 EF2-70027
R. C. DeYoung R. C. Knop s
.Page 21 a
Detroit Edison will provide another_ report-'on this' item, Jeither= interim or final,,when further information is'.
-available.
If you have questions concerning this matter, please. contact Mr. Lewis ' Bregni, ( 313) 586-5083.
Sincerely, j~
cc:
P.-M. Byron R. C. DeYoung R. C. Knop s
5.
5.
                                                                                                              . - , .       -}}
....}}

Latest revision as of 02:46, 13 December 2024

Interim Deficiency Rept,Item 129 Re Lack of Design Calculations for HVAC Duct Supports.Initially Reported on 841001.Analysis of Impact of Off Ctr Hanger Attachment in Progress.Next Rept Will Be Submitted Following Analysis
ML20107L287
Person / Time
Site: Fermi 
Issue date: 10/17/1984
From: Jens W
DETROIT EDISON CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
129, EF2-70027, NUDOCS 8411130477
Download: ML20107L287 (2)
v • d • e


Text

n.--,

_..~s! C;.

.s

,e.;'

- Yayne H. Jens,

IVice Prssident 1

? Nuclear Operations

.~

~

- Fermb2 6400 North Dixie Hghway

.i w No. port, uichigan 48iss October.17,.1984 rW I

l l <ais> sesaiso

'EF2-70027 4-

'i l.

~

~Mr.EJames G. Keppler~

~: Regional' Administrator' 4

Region.III

~

-U. S. Nuclear Regulatory Commission 1799 Roosevelt Road?

i~ Glen Ellyn, IL;60137

Dear'Mr.:

Keppler:

s.

Reference:

'(1)

Fermi 2 NRC Docket No. '50-341

~

(2)

Letter, W. H. Jens to J. G. Keppler, July.16, 1984, EF2-69287

Subject:

Interim Report.of 10CFR50.55(e) Item 129

" Lack of-Design Calculations for HVAC Duct Supports" On October 1, 1984, Detroit Edison's'Mr. J. E. Conen,.

Engineer-Licensing, telephoned Mr. R. Lerch of NRC Region III to provide additional information.regarding 10CFR50.55(e) Item 129, " Lack of Design Calculations for HVAC. Duct. Supports."

Item 129 was originally reported in Reference (2).

h Reference (2) reported that detailed design calculations.for HVAC system ductwork and supports could not be-located. -At

~

least one of the HVAC support designs examined was not rigid and,ntherefore, did not meet the rigid support assumption used in the ductwork seismic analysis.

To resolve this issue, Detroit Edison committed to reanalyze the affected safety related HVAC ductwork supports.

As part of this reanalysis, a sample of the ~HVAC supports was inspected to verify the as built drawings.

Some of the hanger attachment points were found to be noticeably off the center of the base plates.

An analysis of the impact of the off center. attachment is being performed.

The results of this analysis'will be. included in Detroit Edison's final report of Item 129.

-l 8411130477 841017 PDR ADOCK 05000341 S

PDR i

OCT 2 61984 y

/[o

.:c 4; 7

..g i.

G.'

447-

- (j.

,4 j

. j

^

f

_q

-e.

e Mr.JJames G. Kepple'r~

- Octobe r: 17,-1984 EF2-70027

.Page 21 a

Detroit Edison will provide another_ report-'on this' item, Jeither= interim or final,,when further information is'.

-available.

If you have questions concerning this matter, please. contact Mr. Lewis ' Bregni, ( 313) 586-5083.

Sincerely, j~

cc:

P.-M. Byron R. C. DeYoung R. C. Knop s

5.

....

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