ML20246J919

Requests Addl Info Re Direct Generation Response Spectra & Snubber Reduction Program.Response Requested within 30 Days

ML20246J919
Person / Time
Site:	Catawba
Issue date:	08/29/1989
From:	Jabbour K Office of Nuclear Reactor Regulation
To:	Tucker H DUKE POWER CO.
References
TAC-67359, TAC-67360, NUDOCS 8909050300
Download: ML20246J919 (4)

Text

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. ~ August 29, 1989-

.Dockit Nos. 50-413 ' DISTRIBUTION E.? Jordan MNBB-3302 i

.'2 50-414 AD6 Hit me@ B. Grimes 9-A-2 NRC PDR ACRS (10)

%g Mr. H.~ B. Tucker, Vice President Local PDR ~ [ Catawba _ Plant File]

Nuclear Production Department PDII-3 Reading Duke Power Company G. Lainas-14-E-4

.. 422 South Church Street E. Adensam 14-H-3 L Charlotte, North Carolina 28242 D..'Matthews 14-H-25 M. Rood 14-H-25

Dear Mr. Tucker:

K. Jabbour 14-H-25 OGC (For Inform. Only 15-B-18

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION CONCERNING THE DIRECT GENERATION RESPONSE SPECTRA. AND THE SNUBBER REDUCTION PROGRAM - CATAWBA NUCLEAR STATION, UNITS 1 AND 2 (TACS 67359/67300)

The NRC staff has reviewed your latest submittal. dated May 10, 1989, concerning the direct generation response spectra snubber reduction program.

We find that:

1. Our basic concerns expressed during the December 5,1988, meeting were not adequately addressed. These concerns relate to: (a)the appropriateness of the ground response spectra to be used in developing floor res methodology, and-(b)ponse spectra through the direct generationthe adequa density function developed from the ground response spectra in the frequency range of interest.

-2. You have provided adequate information to justify the use of the equipment dynamic analysis package (EDASP) methodology for the direct generation of response spectra at Catawba Units 1 and 2.

Therefore, additional information, as identified in the enclosure, is required before we can complete our review. Your response is requested within 30 days from the date of this letter. Please contact me at (301) 492-1496 if you have any questions.

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

Sincerely,

/s/

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

Enclosure:

As stated cc.w/ enc 1:

See next page '

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August 29, 1989 Docket Nos. 50-413 50-414 Mr. H. B.. Tucker, Vice President Nuclear. Production Department Duke Power Company 422 South Church Street Charlotte, North Carolina 28242

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION CONCERNING THE DIRECT GENERATION RESPONSE SPECTRA AND THE SNUBBER REDUCTION PROGRAM - CATAWBA NUCLEAR STATION, UNITS 1 AND 2 (TACS 67359/67360)

The NRC staff has reviewed your lotest submittal dated May 10, 1989, concerning the direct generation response spectra snubber reduction program.

We find that:

1. Our basic concerns expressed during the Decenber 5,1988, meeting were not adequately addressed. These concerns relate to: (a)the<

appropriateness of the ground response spectra to be used in developing floor res methodology, and (b)ponse spectra the adequacy through of power the power in the direct spectral generation density function developed from the ground response spectra in the frequency range of interest.

2. You have provided adequate information to justify the use of the equipment dynamic analysis package (EDASP) methodology for the direct generation of response spectra at Catawba Units 1 and 2.

Therefore, additional information, as identified in the enclosure, is required before we can complete our review. Your response is requested within 30 days from the date of this letter. Please contact me at (301) 492-1496 if you have any questions.

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

b YI f

' ,,A ta 3. Jabbour, Project Manager Project Directorate 11-3 Division of Reactor Projects 1/II

)

Enclosure:

As stated cc w/ encl:

See next page

,' Mr. H. B. Tucker Duke Power Company Catawba Nuclear Station I

cc:

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

422 South Church Street 3400 Sumner Boulevard Charlotte, North Carolina 28242 P.O. Box 27306 Raleigh, North Carolina 27611 J. Michael McGarry, III, Esq.

Bishop, Cook, Purcell and Reynolds Saluda River Electric Cooperative, 1400 L Street, N.W. Inc.

Washington, D. C. 20005 P.O. Box 929 Laurens, South Carolina 29360 North Carolina MPA-1 Senior Resident Inspector Suite 600 Route 2, Box 179N 3100 Smoketree Ct. York, South Carolina 29745 P.O. Box 29513 Raleigh, North Carolina 27626-0513 Regional Administrator, Region II U.S. Nuclear Regulatory Comission Ms. S. S. - Kilborn 101 Marietta Street, NW, Suite 2900 Area Manager, Mid-South Area Atlanta, Georgia 30323 ESSD Projects Westinghouse Electric Corp. Mr. Heyward G. Shealy, Chief MNC. West Tower - Bay 239 Bureau of Radiological Health P.O. Box 355 South Carolina Department of Health Pittsburgh, Pennsylvania 15230 and Environmental Control 2600 Bull Street County Manager of York County Columbia, South Carolina 29201 York County Courthouse

• York, South Carolina 29745 Ms. 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 Caroliaa 27602 P.O. Box 11549 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 28241 Mr. Alan R. Herdt, Chief Project Branch #3 U.S. Nuclear Pegulatory Comission 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323

s

, Enclosure Request For Additional Information (RAI)

Direct Generation Response Spectra Catawba Nuclear Station Units 1, 2

REFERENCES:

1. Submittal from Duke Power dated May 10, 1989.

2. Summary dated December 13,'1988, of a Decenber 5,1988, meeting with Duke Power on Direct Generation of Response Spectra.

3. RAI dated November 4,1988, concerning the Direct Generation of Response Spectra.

4. Submittal from Duke Power dated September 16, 1988.

1. In references 2 and 3, the staff had suggested two options which Duke Power can use to demonstrate the appropriateness of the input response spectra. The latest submittal (reference 1) neither discusses these options nor provides ground response any(additional spectra bases1for CNS-GRS). Table of the use of4the reference Catawba clearly indicated tht the system responses calculated using the site-specific spectra could be as high as 18% above the responses calculated using the CNS-GRS. For some yet to be analyzed systems, the differences could be still higher. Therefore, the staff requests that Duke Power provide information as to how the input spectra conservatively represent the site characteristics. .

2. Reference 1 indicates that Duke Power is aware of the potential resolution of public comments on the proposed resolution of USI A-40 (revision to SRPs 2.5.2, 3.7.1, 3.7.2, 3.7.3). It should be noted, however, that the assessment of the adequacy of power is still required. It is more critical when the input response. spectra do not represent the site characteristics adequately. Target power spectral density function (PSDF) developed using the site-specific data and the recommendations of NUREG/CR 5347, Appendix B, is acceptable. Duke Power is requested to provide information to demonstrate that the CNS-GRS would satisfy the minimum PSDF criteria.

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