ML17138A571

Requests Addl Info Re Design of Advanced Control Room Complex So Problems Can Be Identified Early in OL Review

ML17138A571
Person / Time
Site:	Susquehanna
Issue date:	03/20/1979
From:	Parr O Office of Nuclear Reactor Regulation
To:	Curtis N PENNSYLVANIA POWER & LIGHT CO.
References
NUDOCS 7904130306
Download: ML17138A571 (8)

Text

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R. Mattson NRC PDR.

D..'oss S. Hanauer L'ocal PDR D. Vassajlo-'

.J. Knight "

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M; Ernst.'-.

Denise R

Hartfield Mr.'No~n'M'urtis -

'0 g9.,OELD BCC..NSIC IE (3);

TIC Vfce.presfdent - Engfneerfng-and Constructfon Pennsylvania Power and Light Company.',.

2 North. Ninth Street.

'llentown; Pennsyl vanf a '8101..:.'-

Dear'r.'uffs:

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-SUBJECT SUSgUEHANtjA STEAM-ELECTRIC 'STATION UNIT NOS -= 1 AND=2

~'- 'E(VEST EOR ADDITIONAL INFORNTION

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'-'n response to your.-request, a meeting was held with your staff on February'-14 1979 to discuss the. Susquehanna Advanced Control Room (ACR) complex; The purpose of. the: meeting was-to provide us with an..

early, over view of. your design so. that problems could be fdentfffed

'arly fn the operating license-review.

/'e noted that PP5L.'did not* utilize General '.Electric. Power Generation Control. Complex.'(PGCC),

whfch we'ave prevfously-reviewed, for your ACR.

Instead you dfd the, conceptual. desfgn for the ACR and your Architect Engineer and Constructor Bechtel is implementing the design fn terms of physical separation and barriers for redundant cable runs. under the elevated control room floor.

In addition we noted, that you are: providing three vertical cable chases for cfrcufts running between the upper.- and lower relay rooms and the control room.. Therefore,. we find that we

. requfr'e.additional information on the design..of the ACR complex es-pecially fn.regard on how.the design conforms to Regulatory Guide 1.75.

The information required'.fs listed.fn:.the Enclosure.-

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Please inform us of the date when'thf's requested addftfonal information will'e available for'- ou} review.

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>ARgo 197'lease contact us, if'ou desire-any dfscussfon or, clarfffcatforn of the.

fnformatf on requested......:

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Stncerely,.

" Orfgfn 1 Stoned bK, ':

0; L'..Petr

'.Ol'an 0; Pari'. Chief.

Lfght Mater. Reactors Branch No. 3

.'fvfsfon of Project'anagement

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Mr. Norman W. Curtis MAR 20 1979 cc:

Mr. Earle N. Head Project Engineering Manager Pennsylvania Power 8 Light Company

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2 North Ninth Street Allentown, Pennsylvania 18101 Jay Silberg, Esq.,

Shaw, Pittman, Potts 8

Trowbridge

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1800 M Street, N.

W.

Washington, D. C.

20036.

Hr. William E,. Barberich, Nuclear Licensing Group Supervisor Pennsylvania Power 8 Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Edward H. Nagel, Esquire General Counsel and Secretary Pennsylvania Power 8 Light Company 2 North Ninth Street Allentown, Pennsylvania 18101 Bryan Snapp, Esq.

Pennsylvania Power 5 Light Company 901 Hamilton Street Allentown, Pennsylvania 18101 Robert M. Gallo Resident Inspector P. 0.

Box 52 Shickshinny, Pennsylvania 18655 Hr. Robert J. Shovlin Project Manager Pennsylvania Power and Light Co.

2 North Ninth Street Allentown, Pennsylvania 18101 Alan R. Yuspeh, Esq.

Shaw, Pittman, Potts 8

Trowbridge 1800 M Street, N.

W.

Washington, D. C.

20036

ENCLOSURE 032.0 032.49

,INSTRUMENTATION AND CONTROL SYSTEMS BRANCH The SSES control room is different from GE's PGCC concept which we have reviewed.

Therefore provide the following information:

(1)

Provide the criteria with appropriate layout drawings and concepts for (a) physical separation and barriers between redundant circuits (b) physical separation and routing of non safety circuits (c) safety channel identification and color coding (d) seismic qualification (e) fire detection and protection (2)

Discuss your conformance to GDC-19 and Regulatory Guide 1.78 (3)

Discuss the provisions for satisfying the recommendations of Regulatory Guide 1.75, and the acceptability of large quantities and large concentrations of cables in a small area immediately beneath the elevated control room floor.

(4)

Discuss the degree of conformance to Regulatory Guide 1.75 in the vertical cable chase between the upper and lower relay rooms.

Justify any exception (i.e. associated circuits) and provide the criteria with appropriate layout drawings depicting

,(a)

,physical separation and barriers between redundant circuits (b) physical separation and routing of non safety circuits (c) safety channel identification and color coding (d) seismic qualification (e) fire detection and protection