ML20206H927

Forwards Request for Addl Info Re Ice Condenser Containment Hydrogen Control Noted in .Response within 45 Days of Receipt of Ltr Requested

ML20206H927
Person / Time
Site:	Mcguire, Catawba, McGuire, 05000000
Issue date:	11/16/1988
From:	Hood D Office of Nuclear Reactor Regulation
To:	Tucker H DUKE POWER CO.
References
TAC-63032, TAC-63033, TAC-63034, TAC-63035, NUDOCS 8811230440
Download: ML20206H927 (4)

Text

• Novembor 16, 1988 Docket Nos.: 50-369, 50-370 50-413, 50-414 Mr. H. B. Tucker, Vice President Nuclear Production Department Duke Power Company 42.2 South Chur.h Street Charlotte, North Carolina 28242

SUBJECT:

REQUEST FOR ADDITIONAL INFORMAT10N REGARDING ICE CONDENSER CONTAINMENT HYDROGEN CONTROL - PCGUIRE AND CATAWBA NUCLEAR STATIONS (TACS 63034,63035,63032,63033)

The NRC has reviewed the information in your letter of July 28, 1988, regarding hydrogen production profilas for the licGuire and Catawba Nuclear Stations. tie find that additional information, identified in the enclosure, is needed to complete this review.

We request that this information be provided within 45 days of receipt of this letter. Should you have questions, contact me at (301) 492-1442, or Kahtan Jabbour at (301) 492-1496.

The reporting and/or recordkeeping requirements contai.ed in this letter affect fewer than ten respendents; therefore, OMB clearance is not required under P. L.96-511.

S ucerely, original Signed By:

Carl S. Hood, Project fianager Project Directorate 11-3 Division of Reactor Projects -1/11 ,

Office of 't;uclear Reactor Regulation

Enclosure:

Ar stated cc: 5 ) next page DISTRitJITION DocketTiW NRC PDR Local PDR PD!l-3 Reading S. Varga 14-E-4 G. Lainas 14 H-3 D. 11atthews 14-H-25 M. Rood 14-H-25 D. Hood 14-H-25 K. Jabbour 14-H-25 OGC 15-B-18 E. Jordan MNBB-3302 B. Grires 9-A-2 ACRS (10) P-315 MCGUTEE, CATAWBA PLANT FILE L. Lois 8-E-23 68112"30440 831116 PDR ADOCK 05000369 P FDC / ,

Up dtN O '

P d p 'p PDil-3 FDII-3 11-3 V 10 '

Miood DHood:sw KJabbcur Dffatthews 11/p//88 11/g/E8 11/g/68 114V88

Mr. H. B. Tucker Duke Power Company Catawba Nuclear Station CC:

A.V. Carr, Esq. North Carnlina Electric Membership Duke Power Company Corp.

422 South Church Street 3400 Sumner Boulevard Charlotte, North Carclina 28242 P.O. Box 27306 Raleigh, North Cr.olina 27611 J. liichael McGarry, III, Esq.

Bishop, Liberman, Cook, Purcell Saluda River Electric Cooperative, and Reynolds Inc.

1200 Seventeenth Street, N.W. P.O. Box 929 Washington, D. C. 20036 Laurens, South Carolina 29360 M.,rth Carolina MPA-1 Senior Resident inspector Suite 600 Route 2. Box 170N 3100 Smoketree Ct. York, South Carelina 29745 P.O. Box 29513 Paleigh, North Carolina 27626-0513 Regional Administrator, Region 11 U.S. Nuclear Regulatory Comission S. S. Kilborn 101 Marietta Street, NW, Suite 2900 Area Manager, Mid-South Area Atlanta, Georgia 30323 ESSD Projects Westinghcuse Electric Corp. Mr. Heyward G. Shealy, Chief MNC West Tnwer - Bay 239 Eureau of Radit, logical Health P.O. Box 355 South Carolina Department of Health Pittsburgh, Pennsylvania 15230 and Environmental Control 2!00 Bull St.reet County Manager of York County Columbia, South Carolina 29201 York County Courthouse York, South Carolina 29745 Karen E. Long Assistant Attorney General Richard P. Wilson, Esq. N.C. Department of Justice Assistant Attorney General P.O. Box 629 S.C. Attorney General's Office Raleigh, North Carolina 27602 P.O. Box 11549 l

Columbia, South Carolina 29211 Mr. Peter G. LeRoy Nuclear Production Department Piedmont Municipal Power Agency Duke Power Company 100 Memorial Drive P.O. Box 33189 Greer, South Carolina 29651 Charlotte, North Carolina 2B241 Nr. Michael Hirsch Federal Emergency Management Agency Office of the General Counsel Room 840 500 C Street, S.W.

Washington, D. C. 20472

Mr. H. B. Tucker Duke Power Company McGuire Nuclear Station cc:

Mr. A.V. Carr, Esq. Dr. John ti. Barry Duke Power Company Department of Environmental Health P. O. Box 33189 Mecklenburg County 422 South Church Street 1200 Blythe Boulevard Charlotte, North Carolina 28242 Charlotte, North Carolina 20203 County Manager of Mecklenburg County Mr. Dayne H. 2rown, Chief 720 East Fourth Street Radiation Protaction Branch Charlotte, North Carolina 28202 Division of Facility 5 cvices Depart.unt of Human Resources 701 Barbour Drive Mr. Robert Gill Raleigh, North Carolina 27603-2008

Duke Power Company Nuclear Production Department 4

P. O. Box 33189 4

Charlotte, North Carolina 28242 J. Michael McGarry,111. Esq.

Bishop, Liberman, Cook, Purcell

- and Roynolds 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 a

l Regional Administrator, Region II

, U.S. Nuclear Regulatory Comission 101 Marietta Street, N.W., Suite 2900 Atlanta, Georgia 30323

3. S. Kilborn Area Manager, Mid-South Area

ESSD Projects Westinghouse Electric Ccrporation j MNC West Tower - Bay 239 P. O. Box 355 Pittsburgh, Pennsylvania 15230

(

h

Enclosure REQUEST FOR ADDITIONAL INFORMATION REGAPDING ICE CONDENSER CONTAlhMENT -

HYDROGEN CONTROL FOR MCGUIRE AND CATAWBA NUCLEAR STATIONS The NRR staf f has reviewed the information submitted by Duke Power Company on  ;

July 28, 1988, regaroing hydrogen production profiles for the McGuire and Catawba Huclear Stations. We fino that the following additional information is needed to complete our review:

1. Provide information that will permit association of the pertinent physical ,

phenomene (e.g.,: clad and fuel temperatures, steam flow, water level, clad i relocation, etc.) occurring in the core during tn+ transient with the features  ;

of the hydrogen production profile, j

2. Has Duke Power Company evaluated (1) the frequency of hydrogen generation f for each of the scenarios presented, and (2) the probability of recovery before i the core non-recoverability limit is reached? If so, please state the results t of these ev61uations.

3. Provide a discussion of the association between hydrogen production level <

, and core damage. For the 75% metal water reaction, your description indicates  !'

l that the cure is in rchble. What is the assumed state of the core at the i

recoverability limit? When and how does the core proceed to collapse? What is  !

the state of the cladding after recoverability (i.e., is the clad assured to be '

frozen at the core plate, or on the collapsed fuel or in sort other state)?

i

4. At the melting point of the eutectic UO -Zr-Ir0 , what is the status 2

i of the clad and the temperature of the fuel? How do6s the change in temperature l proceed? Is it assumed that some of the clad relocates before the '

l non-recoverability limit is reached?

) 5. What is the status of the cladding when reflooding is initiated? Has  ;

l any clad relocation taken place? Has any clad freezing and plugging taken place? i 4  ;

i 6. The HEATUP ano ACCUM subroutines of the MAAP 3B code are described in t l Appendix 5 cf your submittal, including a cooperison of three hydrogen production '

! profiles of the PWR-MAAP heatup vs the EPRI PWRCHC. 15 this the full extent of  !

the MAAP-3B ben hmarking? Are there any other "qualification" activities involved? How was EPRI PWRCHC benchmarked?

I 7 What were the bases for selection of the four scenarios discussed in your i

! submitta l"; Ware they selected on the bases of their maximum hydrogen i produc.tton, maxiinum f requency or on the basis of some other criteria? What other scenarios were considered for these selections? -

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