ML20236A502

Forwards Request for Addl Info Re ATWS Mitigation Sys Actuation Circuitry Design at Plants,Per 871005 Telcon. Response Requested within 30 Days of Ltr

ML20236A502
Person / Time
Site:	Mcguire, Catawba, McGuire, 05000000
Issue date:	10/13/1987
From:	Jabbour K Office of Nuclear Reactor Regulation
To:	Tucker H DUKE POWER CO.
References
TAC-59111, TAC-59112, NUDOCS 8710220304
Download: ML20236A502 (5)

Text

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Dock $tNos.:

50-369, 50-370 l'

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and 50-413, 50-414' 1

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s Mri H.. B. Tucker, Vice President

! Nuclear Production Department OCT 131987 1

1 Duke Power Company 1

-422 South Church Street Charlotte, North Carolina 28242 1

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Subject:

. Request for Additional Information Concerning the-ATWS/AMSAC-l Design at the McGuire and Catawba Nuclear Stations

.On.0ctober 5, 1987, the~ staff held a conference' call with members of Duke Power Company.to discuss your submittals of January 23, April 9, and June 18, 1987, and Revision-1 to WCAP 10858P-A concerning the ATWS mitigation system actuation circuitry.

We find;that additional information,ridentified in the enclosure, 1

.is required to complete our. review.

1

Your response to the enclosure is. requested within 30 days of this letter.

Contact me at (301) 492-7367 or D. Hood at (301) 492-8961 if you have.

questions.

Sincerely,

\\S\\

Kahtan N. Jabbour, Project Manager Project Directorate 11-3 Division of Reactor Projects, I/II

Enclosure:

As stated cc:. See next page i

DISTRIBUTION:

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UNITED STATES

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g NUCLEAR REGULATORY COMMISSION L

j WASHING TON, D. C. 20555 OCT 131987 Docket Nos.:

50-369, 50-370 i

and 50-413, 50-414 Mr. H. B. Tucker, Vice President l

Nuclear Production Department l

Ouke Power Company'

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422 South Church Street Charlotte, North Carolina 28242

Subject:

Request for Additional Infomation Concerning the ATWS/AMSAC Design at the McGuire and Catawba Nuclear Stations 1

On October 5, 1987, the staff held a conference call with members of Duke Power Company to discuss your submittals of January 23. April 9, and June 18, 1987, and Revision 1 to WCAP 10858P-A concerning the ATWS mitigation system actuation circuitry. We find that additional infomation, identified in the enclosure, is required to complete our review.

Your response to the enclosure is requested within 30 days of this letter.

Contactmeat(301)492-7367 or D. Hood at (301) 492-8961 if you have questions.

l 4.i Sincerely, (dh Al.Y I

Kahtan N. Jabbour, Project Manager Project Directorate II-3 l

Division of Reactor Projects, I/II l

Enclosure:

As stated cc:

See next page

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ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION CONCERNING CATAWBA AND MCGUIRE NUCLEAR STATIONS, UNITS 1 AND 2 ANTICIPATED TRANSIENTS WITHOUT SCRAM

1.. Discuss the changes made in Revision 1 to the WCAP 10858P-A with respect to their impact on the Duke Power AMSAC design. Specifically, discuss (a) the turbine trip variable time delay as specified in the revised WCAP and (b) the C-20 permissive mechanisms.

2.

Discuss the administrative procedures that will be used to direct operators regarding the use of the C-20 permissive (reset) below the 40 percent load value.

3.

Discuss the turbine trip on (a) loss of both main Feedwater Pump Turbines and (b) closure of the MFW control / isolation valves with respect to the ATWS scenarios contained in WCAP Section 2.0, Design Bases (Loss of Main Feedwater and Loss of Load).

4.

Provide updated logic diagrams showing:

(a) The time delay increases to 30 seconds in the Feedwater Control Valve signal circuit (b) The deletion of the time-delay in the Turbine Trip circuit t

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"U Duke Power Company

,<n McGuire Nuclear Station ih"4 m

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Mr. A.V. Carr, Esq.

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Dr. John M. Barry Duke Power Company.

i Department of Environmental Health P. O. Box 33189 Mecklenburg County

'422 South Church Street 1200 Blythe Boulevard Charlotte, North Carolina 28242 Charlotte, North Carolina 28203 County Manager of Mecklenburg County

Mr. Dayne H. Brown, Chief 720 East Fourth Street Radiation Protection Branch Charlotte, North Carolina 28202 Division of Facility Services Department of Ht. man Resources 701 Barbour Drive 3

Mr. Robert Gill Raleigh, North Carolina. 27603-2008 Duke Power Company 1

Nuclear Production Department P. O. Box'33189' Charlotte, North Carolina 28242 l

1 J. Michael McGarry, III, Esq.

i Bishop, Liberman, Cook, Purcell and Reynolds i

1200 Seventeenth Street, N.W.

Washington, D. C.

20036 Senior Resident Inspector

.c/o U.S. Nuclear Regulatory Comission Route 4, Box 529 Hunterville, North Carolina 28078

)

Regional Administrator, Region II i

U.S. Nuclear Regulatory Commission,

'i 101 Marietta Street, N.W., Suite 2900 l

Atlanta, Georgia 30323 l

'g L. L. Williams I

Area Manager, Mid-South Area l

ESSD Projects Westinghouse Electric Corporation HNC West Tower - Bay 239 P. O. Box 355 Pittsburgh, Pennsylvania 15230 I'

1 4

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Mr. H. B. Tucker i

Duke Power Company Catawba Nuclear Station I

i cc:

A.V. Carr, Esq.

North Carolina Electric Membership i

Duke Power Company Corp.

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422 South Church Street 3400 Sumner Boulevard.

Cherlotte, North Carolina 28242 P.O. Box 27306 l

Raleigh, North Carolina 27611 J. Michael McGarry, IIL Esq.

i Bishop, Libennn, Cook, Purcell Saluda River Electric Cooperative,

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and Reynolds Inc.

i 1200 Seventeenth Street, N.W.

P.O. Boy 929 l

Washington, D. C.

20036 Laurens, South Carolina 29360

. North Carolina MPA-1 Senior Resident Inspector Suite 600 Route 2 Box 179N i

3100

.oketree Ct.

York, South Carolina 29745 P.O. Box 29513 I

Raleigh, North Carolina 27626-0513 Regional Administrator, Region II U.S. Nuclear Regulatory Commission,

.L.L. Williams 101 Marietta Street, NW, Suite 2900 Area Manager, Mid-South Area Atlanta, Georgia 30323 ESR Projects Westi ; house Electric Corp.

MNC h st Tower - Bay 239 P.O. Box 355 Pittsburgh, Pennsylvania 15230 Mr. Heyward G. Shealy, Chief Bureau of Radiological Health South Carolina Department of Health and Environmental Control 2600 Bull Street

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Columbia, South Carolina 29201 County Manager of York County York County Courthouse Karen E. Long York South Carolina 29745 Assistant Attorney General

)

N.C. Department of Justice Richard P. Wilson, Esq.

P.O. Box 629 Assistant Attorney General Raleigh, North Carolina 27602 S.C. Attorney General's Office P.O. Box 11549 Spence Perry, Esquire Columbia, South Carolina 29211 General Counsel Federal Emergency Management Agency Piedmont Municipal Power Agency Room 840 100 Memorial Drive 500 C Street Greer, Scuth Caroline 29651 Washington, D. C.

20472 Mr. Michael Hirsch Federal Emergency Management Agency Offk e of the General Counsel Room 840 500 C Street, S.W.

Washington, D. C.

20472 Brian P. Cassidy, Regional Counsel Federal Energency Management Agency, Region I

[.yMc{onnach POCH

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