ML20090J098

Advises That Security Door Box Conduit,Described in Auxiliary Shutdown Panel Survey,Will Not Be Relocated Prior to Fuel Load.Considerable Cost Would Be Incurred W/No Offsetting Benefit in Level of Plant Safety

ML20090J098
Person / Time
Site:	Callaway
Issue date:	05/15/1984
From:	Schnell D UNION ELECTRIC CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
ULNRC-822, NUDOCS 8405220192
Download: ML20090J098 (4)

Text

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l U NION ELECTRIC COM PANY 1908 GRATIOT STREET ST. LoulS, MISSOURI DONALD F. SCHNELL o most ido

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Mr. Harold R.

Denton Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, DC'20555 ULNRC-822

Dear Mr. Denton:

DOCKET NUMBER 50-483 CALLAWAY PLANT UNIT 1 CONTROL ROOM DESIGN REVIEW

Reference:

SLNRC 84-048 dated March 21, 1984 The reference letter provided a formal Callaway implementation schedule for resolutions to the Supplemental Survey (SS)- and the Auxiliary Shutdown Panel (ASP) survey findings.

A subsequent review of the schedule and work progress indicates that the security door box conduit described in ASP rinding 1.1 will not be relocated prior to fuel load.

(This was incorrectly included in Finding 1.5 in the reference.)

Construction of the ASP room at Callaway is now complete and the security door box hanger has been removed.

Union Electric has conducted inspections and performed operator training on the completed ASP and has determined that the existing site-specific security door box conduit does not' constitute a problem to the operation of these control panels.

Relocation of this conduit will have a considerable cost impact with no offsetting benefit in the level of plant safety; therefore, this conduit will not be relocated.

Additional inspections and analysis of the completed ASP regarding the displays described in ASP Finding 1.5 have determined that these meters can be readily viewed by a fifth percentile operator.

However, a temporary step stool has been placed in the ASP room to further enhance the reading of these meters.

We have determined that additional modifications regarding this finding will entail costly structural changes with no offsetting benefit.in the level of plant safety; therefore, the temporary step stool will be retained as the permanent resolution to this finding.

Union Electric wishes to point out the numerous design modifications made,to the~ ASP and room to meet changing NRC requirements.

These~ include enclosing the panels with class I walls and ceiling, separation of the panels,-placement of a fire barrier between the panels,'and the addition of. control' room KO $

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Mr. Harold R. Danton May 15, 1984

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Page 2 isolation switches.

While these changes resulted from other requirements,they have impacted certain Human Factors aspects.

Union Electric believes the auxiliary shutdown panels and room are adequate from a human factors viewpoint and plans no further changes.

This approach will be reflected in the Supplement to the Summary Report to be submitted prior to exceeding 5% power.

Very truly yours, A Don ld F Schnell MHH/ DES /msc cc:

J. H. Holonich

o STATE OF MISSOURI )

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SS CITY OF ST. LOUIS )

Robert J. Schukai, of lawful age, being first duly sworn upon oath says that he is General Manager-Engineering (Nuclear) for Union Electric Company; that he has read the foregoing document and knows the content thereof; that he has executed the same for and on behalf of said company with full power and authority to do so; and that the facts therein stated are true and correct to the best of his knowledge, information and belief.

By a>

Robert W hukai General Manager-Engineering Nuclear SUBSCRIBED and sworn to before me this /

day of 198k l

V BARDARA J. PFAF NOTARY PUBLIC, STATE OF MISSOURf MY COMMIS$10N EXPIRES APRIL 22,1985 ST. LOUIS COUNTY

h cct Glenn L. Koester Vice President Operations Kansas Gas & Electric P.O. Box 208 Wichita, Kansas 67201 Donald T. McPhee Vice President Kansas City Power and Light Company 1330 Baltimore Avenue Kansas City, Missouri 64141 Gerald Charnoff, Esq.

Shaw, Pittman, Potts & Trowbridge 1800 M. Street, N.W.

Washington, D.C.

20036 Nicholas A.

Petrick Executive Director SNUPPS l

5 Choke Cherry Road l

Rockville, Maryland 20850 l

l John H. Neisler l

Callaway Resident Office U.S. Nuclear Regulatory Commission RR91 Steedman, Missouri 65077 William Forney Division of Projects and Resident Programs, Chief, Section lA U.S. Nuclear Regulatory Commission Region III 799 Roosevelt Road l

Glen Ellyn, Illinois 60137 l

l Bruce Little l

Callaway Resident Office U.S. Nuclear Regulatory Commission RR41 Steedman, Missouri 65077 s