ML19330C233

Forwards Points to Be Addressed in 801231 SEP Submittal Re Anchorage & Support of safety-related Electrical Equipment

ML19330C233
Person / Time
Site:	Big Rock Point File:Consumers Energy icon.png
Issue date:	07/28/1980
From:	Crutchfield D Office of Nuclear Reactor Regulation
To:	Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
References
TASK-03-11, TASK-3-11, TASK-RR NUDOCS 8008080110
Download: ML19330C233 (5)

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UNITED STATES 8

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NUCLEAR REGULATORY COMMISSION j

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E WASHINGTON, D. C. 20555

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g g-JUL 2 81980 Docket No.

504W i

Mr. David P. Hoffman Nuclear Licensing Administrator Consumers Power Conpany 1

212 West Michigan Avenue Jackson, Michigan 49201

SUBJECT:

ANCHORAGE AND SUPPORT OF SAFETY RELATED ELECTRICAL EQUIPMENT l

References:

1.

Letter from D. Eisenhut to SEP Licensees, dated January 1,1980 2.

Letter from R. Schaffstall to D. Crutchfield, dated July 3, 1980 Reference 1 identified 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 including the installation of any required modifications by September 1,1980. Reference 2 describes a program which was developed by the Systematic Evaluation Program Owners Group in response to comments made by members of the NRC staff at a May 14, 1980 meeting in Bethesda. As a result of your comments rd our review of Reference 2, we are providing additional guidance to you as indicated in the Attachments. provides guidance as to the expected scope of your investications and information which should be documented 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 1 and in particular the issue of support of internally attached electrical co@onents, we will permit an extension until December 31, 1980 for conpletion of this program.

This shall include the installation of any modifications which may be required as a result of your investigations. Any modifications shall be made in accordance with 10 CFR 50.59 of the Comission Regulations. We request that formal docurantation summarizing your program be submitted to this office by December 31, 1980.

Existing plant floor response spectra or floor response spectra computed or estimated from the NRC Site Specific Spectra Program are acceptable 8008080110 6

Mr. David P. Hoffman

-2 8 1980 for use in your evaluation.

The conservatism of these loadings shall be verified when the final floor response spectra are available.

Sincerely, V WL f W<

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1. Dennis M. Crutchfield, Chief Operating Reactors Branch #5 Division of Licensing Attachments:

As stated cc w/ attachments:

See next page l

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L-Mr. David P. Hoffman cc M. I. Miller, Esquire U. -S. Environmental Protection

-Isham, Lincoln & Beale Agency Suite 4200 Federal Activities Branch One First National Plaza Region V Office Chicago, Illinois 60670 ATTN: EIS C0ORDINATOR 230 South Dearborn Street Mr. Paul A. Perry, Secretary Chicago, Illinois 60604 Consumers Power Conpany 212 West Michigan Avenue Charles Bechhoefer, Esq., Chairman Jackson, Michigan 49201 Atomic Safety and Licensing Board Panel Judd L. Bacon, Esquire U. S. Nuclear Regulatory Conrnission Consumers Power Coupany Washington, D. C.

20555 212 West Michigan Avenue Jackson, Michigan 49201 Dr. George C. Anderson Department of Oceanography Myron M. Cherry, Esquire University of Washington Suite 4501 Seattle, Washington 98195 One IBM Plaza Chicago, Illinois 60611 Dr. M. Stanley Livingston 1005 Calle Largo Ms. Mary P. Sinclair Santa Fe, New Mexico 87501 Great Lakes Energy Alliance 5711 Summerset Drive Resident Inspector Midland, Michigan 48640 c/o U. S. NRC P. O. Box 87 Kalamazoo Public Library South Haven, Michigan 49090 315 South Rose Street Kalamazoo, Michigan '49006 Palisades Plant ATTN: Mr. J. G. Lewis Township Supervisor Plant Manager Covert Township Covert, Michigan 49043 Route 1. Box 10 Van Buren County, Michigan 49043 William J. Scanlon, Esquire 2034 Pauline Boulevard

. Office of the Governor (2)

Ann Arbor, Michigan 48103 Room 1 - Capitol Building Lansing, Michigan 48913 Director, Technical Assessment Divi sion Office of Radiation Programs (AW-459)

U. S. Environmental Protection Agency Crystal Mall #2 Arlington, Virginia 20460 K.:

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, ATTACHMENT 1 ANCHORAGE AND SUPPORT OF SAFETY RELATED ELECTRICAL EQUIPMENT POINTS TO BE ADDRESSED BY SEP LICENSEES IN DECEMBER 31, 1980 SUBMITTAL 1.

Information should be provided not only for the anc*1orage of electrical

' equipment but also the entire support that provides a load oath (such as bracing and frames), as well as support for. internally attached components.

The latter is especially important for cabinet or panel type electrical equipment (such as control panels, instrument panels, etc.) which has internally supported components.

An example of a potential improperly supported internal component would be a heavy component cantilevered off a front sheet metal panel without additional support to a stronger and stiffer location.

These inadequate sujiports for internal components also should be i.dentified and corrected before Degember 31, 1980.

2.

In order towrify that an anchorage or a support of safety related electrical equipment has adequate capacity, provide justification by test, or analytical means.

If expansion anchor bolts exist, justifi-cation pro ided previously for IE Bulletin 79-02 can be utilized if applicable.

The acceptance criteria for substantiating these judgements should be provided, this may involve specifying the factor of safety and allowable stress limits used for design and justifying the overturning moment and shear force used.

3.

Provide a table listing all (to include both floor and wall mounted) safety related electrical equipment in the plant.

For e:ch piece of equipment provide the information described in the attached table (attachment 2).

These investigations of each piece of equipment should determine:

a.

Whether positive anchorage or support exists b.

The type of anchorage c.

Whether internally attached components are properly supported

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d."

Identify non-seismic Category I equipment, the dislodgement of which during an earthquake may be detrimental to safety related equipment and render them inoperable.

Inspection of the anchorages of such non-seismic Category I equipment should be conducted.

If positive 4

anchorages do not exist, they should be identified and modified before December 31, 1980.

f 4.

Wherever modifications of anchorages or supports are required, these

. modifications should be implemented and thoroughly documented.

5.

The seismic design of cable trays may be treated as a separate problem, because of its complexity.

Each licensee or the SEP Owner's Group. should provide a separate action plan for the resolution of this issue within 30 i

days.of receipt of this letter.

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ATTACH ENT 2 SuppMRY of INVESTIGATION Of ANCH0ftAGE AND SUPPORT Of SAFETY RELA'2D ELECTRICAt. EQUIPE NT AND NON-SEISMIC CATEGORY I ITEffS THAT M4T DAMAGE THIS EQUIPMENT I

System Internally Attached Components Non-Selselc Cat I Items I.D. of Egstp. Eh.ip.

In Which location Type of Was Anchorage Modiffed Tquip7aMF Type w mrtupport that could potentially Decisment

.Name ID

!astalled Bldg. & Elev.

Anchorage

• Since Jan. 1. 1960

& ID Support Evaluated Interac : with th is eeufo.

Supporting Name &

Type of Was Support Conclusion

_ ID Support Evaluated I

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'Esamples of Type of Anchorage:

l.

Bolted to Equipment 2.

Bolted to Concrete Wall

- 3.

Bolted to Concrete Slab

( 4.

Bolted to Block Wall

• 5.

Welded to Embedded Channel s

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