ML17192A879

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Forwards Points to Be Addressed in 801231 SEP Submittal Re Anchorage & Support of safety-related Electrical Equipment
ML17192A879
Person / Time
Site: Dresden Constellation icon.png
Issue date: 07/28/1980
From: Crutchfield D
Office of Nuclear Reactor Regulation
To: Peoples D
COMMONWEALTH EDISON CO.
References
NUDOCS 8008140117
Download: ML17192A879 (7)
v • d • e


Text

I

... riJ...bo 6 - --

Docket No. 50-237 Mr. o. Louis)eoples Director of Nuclear Licensing Corrunonwealth. Edison Company*

Post Office Box 767 Chicago, Illinois 60690

  • oe*ar Mr. ~eop les:

SUBJECT:

. ANCHORAGE ANO SUPPORT OF SAFETY RELATED ELECTRICAL EQUIPMENT

References:

1. *Letter froni,o. Eisenhut to SEP Licensees, dated*

January 1, 1980

2.

Letter fro~R;~Schaffstall too. Crutchfield, dated

  • July 3, 1980 *

/.

Refereote 1 identified.a potential safety concern relative to the anchorage and support of safety relate<i: electrical equipment* ai:id requested. that you

  • initiate. a program to resolve this issue including the installation of any

.. required modifications by September*1, 1980*

Reference 2 describes a program**.,

which was *developed by the _Systematic Eva*luation Program O.wners,Group in response.to corrunents made *by members of the NRC staff.at.a May 14, 1980 meeting in Bethesda.

As a result of your corrunents and our review of.Reference 2, we are providing additfonal* guidance to you as indicated in the Attachments. prov.ides guidance as to the expected scope of your investigations

. and information which should be.documented forcour review~ A suggested format for this documentation is provided in Attachment 2.

Due to the lack of.

clarification relative to. certain requirements *of Reference. l and in particular the issue of support of internally attached electrical components, we will permit *an exten-~ion* until Oecember 31, 1980 for*completion*of this program.

This. shall include the installation of any modifications which *may be required as a result of your investigations.

Any modificatjons sha-11 be made in accordance with 10 CFR 50.. 59 of the Commission Regulations. - We*

request that formal docume.ntation summarizing your program be submitted to th ts off ice by December 31, 1980.

Existing plant floor response spectra or floor response spectra computed or estimated from the NRC Site Specific Spectra Progra.m,~ptable UH.................. ~:

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MlC FORM 318 (9*76) -NRCM 0240.

~

u.a. GOVBRNMllNT PRINTING o~~ICU: I 11_* - Z** - 711

  • for use in your eval~~t1on *. The conserv~tism of these loadings shall be verified when the final fl.oar response spectra are available.*

~}

Attachments:

As stated*

cc w/attachments:

See next page DISTRIBUTION*

Docket NRC PDR Loca.1 PDR ORB Reading SEPB Reading NRR Reading

. DCrutchfi e 1 d HSmith PO'Conndr JTCarter WRussel l OELD OI&E(3)

ACRS(l6)

TERA NSIG JRBuchanan, NSIC Hlevi*n DA 11 i son

  • Glainas DEi senh.ut RPurple OP'P'ICll..

llVRNAIUE..

NllC POIUif 318 (9*76) NRCM O:Z<CQ Sincerely.,

Dennis M. Crutchfield, Chiefi. *

. Operating React()rs Branch #5 Divisio~_6f Licensing U.8. GOVBRNMllNT PRINTING Ofl'P'ICll: t 171 - ~II "'711

\\.

UNITED STATES

_NUCLEAR REGULATORY COMMISSiON WASHINGTON, D. C. 20555.

  • Docket No. 50-237

. Mr. D. loui.s Peoples

  • Director of Nuclear Licensing
  • C orranonwea 1th Edis on Co"°" any Post Office Box 767 Chicago~ Illinois* 60690

Dear Mr~* Peoples:

JUL 2*8 1980

SUBJECT:

ANCHORAGE AND SUPPORT OF SAFETY RELATED ELECTRICAL EQUIPMtNT

References:

1.

Letter from D. Eisenhut to SEP Licensees, dated *.

  • . January l; 1980
2. Letter from.R. Schaffstall ~o o. Crutchfield, dated July 3, 1980

. Reference 1 ident.ified a potential safety concern relative to the anchorage and support of safety related electrical equipment and requested that you:

  • initiate a program*to resolve this.issue incl.uding the installation of any required modifications by September l, 1980.

Reference 2 describes a program which was developed by the Systematic. Evaluation Program Owners Group in response to corrlnents. made by members of the NRC staff ~t a May 14 '* 1980.*

meeting in Bethesda.

As **a result of your co1T111ents and our review of Reference 2, we are providing additional guidance to you as indicated in the Attachments.

-Attachment l provides guidance as to the expected scope of your investigations and information which should be do.cumented for our review *. A suggested format

  • for this documentation is provided in Attachment 2.*

Due to the lack of clarification relative to certain requirements of Reference land in particular

. :the *issue of support. of internally attached electrical'co"°"onents, we will permit an extension until December 31, 1980 for completion of this program.

This shall include the installatiOn of any modifications which may be**

. required-as a result of your investigations.

Any modifications shal.l be

    • .made in accordance* with 10 CFR 50.59 of the Conmission Regulations.

We

    • request that formal documentation summarizing your program be submitted to this office by December 31, 1980.

Existing plant floor response spectra.or floor respo~se spectra computed or estimated from the NRC Site Specific Spectra Program are acceptable

l r

~t

~.

~r. o. Louis Peop1es

. *. *. *dUL:2 8. 1980 <.

.. *.. for use in your eva 1 uat ion *.. The conservatism of these 1 oadi ngs shall* be:.

verified when the final floor. response spectra are available.*

. Sincerely,

)-.

)<.

~... '

  • Attachments:
  • As. stated.*
    • cc w/attachments:

See next page

  • 4.. '

.. ~ /... -; / *rvf~.. /).. */

f.

r/-/~1.*J" t/: ~//'~~~

/'\\/. Dennis.M. Cru.tchfie.1.d, Chief **

Operating Reactors Branch #~. *

  • Division ~f Licensing * *.

\\

.*Mr.* D *. Louis Pe.oples***

cc*.

Isham, Lincoln & Beale

  • . Counselors at Law *:
    • One First National Plaza, 42nd Floor
  • Chicago, Illinois* 60603
  • Mr. B. B.

Stephenson~*

.Plant Superintendent Dresden Nuclear Pawer StatiOn Rural Ro'ut*e #1

  • Morris, Illinoit 60450 *
  • Su~an N~ Sekuler, Ass i Stant Attorney *Gene.ra l E nvi ronmenta l Control Division 188 w. Randolph Stre.et
  • Suite 2315* *.
  • Morris P~blic Library 604 Liberty Street.
  • Mor~is, Illin6is 60451
  • Chairman *
  • Board of Supervisors of*.

Grundy County Grundy* County. Courthouse Morris, Illinois *60450 Department of Public Health

  • ATTN:. Chief, Division of.**

. Nuclear Safety :

535 West Jefferson Springfield,_ Illinois 62761 Director,.Technical A$sessment.**

. Division Office of Radi atiOn Programs

. :._ (AW-459)

u. *. s *. Environment a 1. Protection
  • A~n~
  • Crysta 1 Ma 11 #2.*
  • Arlington, V irgi ni a 20460
  • u. s. Environmental. Protection

. Agency.

federal Activities Branch Region V Office*

ATTN: ** EIS COORDINATOR*..

230 South

Dearborn:

Street*.*

.*.Chicago, Illinois*. 606:0~. ***

  • J Res idenf Inspector.*

Dresden Nuclear Pa,.ier. Stat ion c/o. U. S. NRC.

Rura 1

  • Route #1 Morris~ Illinot~ 60450

... -:---~*.:-*..

~*

.. ATIACHMENT 1 *.*

ANCHORAGE AND SUPPORT OF SAFETY - -

  • RELATED ELECTRICAL EQUIPMENT-::.

- POINTS TO BE ADDRESSED BY SEP -

LICENSEES IN DECEMBER 31, 1980.

SUBMITIAL **

1..Informatfon should be provided not only Jor the anc'.1orage. of e1ectrical
  • . _ equi~ment ~Ut also the entire support that provides a load oath (such as

_ bracing and frames), as well as suppo_rt for internally attached cornponentS.

--

  • Th.e latter i~ especially important for cabine~ or panel type electri_cal.* *:

equipment '(.such as control panels; instrument panels; etc.) which has.*

internally supported components. **An example of*_a potential.improperl/

_*supported. internal component would be a heavy' component cantilevered off.*

.a front sheet metal panel without additi~nal support to a -stronger and _

  • _.. stiffer location';

These inadequate supports for internal. components* also

  • snoul d be i_denti fi ed-.and corrected before December 31; l 980.
2.

In order tc;> Vi:ri fY: that an anchorage or a* support of.safety related.

electrical equipment has adequate capacity, prov.ide justification by test, or analytical' means*.

If expansi-on anchor bolts exist-, justifi;..

cat ion provided previously for I.E Bulletin 79-02 can be uti 1 i zed if

. applicable. - The _acceptance criteria for. substantiating these judgements

  • should be provided~ this may involve specifying_the_ factor 9f safety and***

allowable stress-limits. used for-design and justi.fying the overturning_-**

mome_ri't and shear force' used~

'\\

3; Provide a* tab 1 ~-- listing. all. Jto incl ud~ both.floqr. and wail mo~rited) safety *.

related electrica_l equipment.in 'the. plant*.

For e~ch piece of equipment -

--' pro\\/-ide the information.des-cr\\be-d in the-attached table (attachment 2)._

  • rnese inv~stigations.of each piece of equipment should determine:
a.

Whether positive *.anch_orage or support exists

    • b.

-- The type of ancho~age *--

... c.*

  • VJhether interha-11y attached. components are properly supported *

.

  • d.-' Identify non-seism.ic Category I equipment, the dislodgement of which
    • . during:an earthquake ~ay be detrimental to safety related equipment -

Insp~ction o( the anchorages of s*uch

  • _- no'n-seismic Category I equipment should be conducted.

If positive -

- anchorages do not exist, they.should be ideritified and.modified.*

before_ December 31,.1980.

4.,: Wherever modifications of anchorages or supports are required, these -

modifications should be implemented and thoroughly documented.

5. *_The s~ismic d~sign cif cable tr~ys may be treated.as ~-ieparate p~oblem,,
  • . because*of its complexity.

Each licensee or the SEP Owner's Group should

~provide a separate ac.tion plan for the resolution of. this issue within. 30 days of receipt.of th1s_1ette_r..

, 1.

System Equtp..Equtp.

tn Whtch.

Name

  • lff Installed

. 1 *Exaq>les of Type ~f Anchorage;

  • * ' 1. *.Bolted to Equtpment *..
  • 2.. Bolted. to Concrete Wa11 * *
l. *.Bolted to Concrete Slab
4. Bolted to Block Wall
5.

Welded to Eui>edded Chllnnel

.*I<>,,

Locattori Bldg. & flev.

ATTA*C~IHENl 2 *

SUMMARY

Of. INVESTIMTION Of ANCilORAGE AND SUPPOIU Of

  • SAfETY RELATED.ELECTRICAL EQUIPMENT AND NON:-SEIS111C CATEGQR( I

,. ITEHS THAJ'HA.Y DAHl\\GE TlllS EQUIPHENT Type*of

  • Anchorage*

.J '

.r:
  • I*
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