ML20150C248

Forwards Safety Evaluations Re Fracture Toughness Requirements for Protection Against PTS Events,Per 10CFR50.61.NRC Finds Pressure Vessel PTS Ref Temp Acceptable Subj to Condition Re Rev of Peak Fluence Methodology

ML20150C248
Person / Time
Site:	Catawba
Issue date:	06/28/1988
From:	Jabbour K Office of Nuclear Reactor Regulation
To:	Tucker H DUKE POWER CO.
Shared Package
ML20150C251	List: ML20150C248 ML20150C261 ML20150C265
References
TAC-59946, TAC-64917, NUDOCS 8807120375
Download: ML20150C248 (4)

Text

.

gga Mpoq[9,; UNITED STATES e 8 o NUCLEAR REGULATORY COMMISSION 3 j WASHINGTON, D. C. 20555

\...../ June 28, 1988 Docket Nos.: 50-413 and 50-414 Mr. H. B. Tucker, Vice President Nuclear Production Department Duke Power Company 422 South Church Street Charlotte, North Carolina 28242

SUBJECT:

SAFETY EVALUATIONS ON FRACTURE TOUGHNESS REQUIREMENTS FOR PROTECTION AGAINST PRESSURIZED THERMAL SH0CK EVENTS, 10 CFR 50.61 (TACS 59946/64917, MPA A-21) - Catawba Nuclear Station, Units 1 and 2 By letters dated October 1, 1985, and November 11, 1986, you submitted information on the material properties of, and the fast neutron fluence on, the reactor pressure vessel for Catawba Units 1 and 2 in response to the Pressurized Thermal Shock (PTS) rule,10 CFR 50.61. By letter dated September 1,1987, you provided the analysis results of Capsule Z from Catawba Unit 1 Reactor Vessel Radiation Surveillance Program.

Based on its review of the fast neutron fluence on the inside surface and the material properties of thc pressure vessel, the staff 'inds that the Catawba Unit 1 pressure vessel meets the toughness requirements of 10 CFR 50.61 for 32 effective full power years of operation. This is a 40-year design life based on an 80 percent capacity factor. The reference tem erature calculated for Unit 1 by the t.pplicable equation in 10 CFR 50.61(b)p(2) is below the applicable screening criterion in the rule. The staff's Safety Evaluation is contained in Enclosure for Unit 1.

For Catawba Unit 2 the staff finds that the pressure vessel PTS reference temperature is acceptable subject to the condition that a revision of the peak fluence estimation methodology (E greater than or equal to 1.0 MeV) for 32 effective full power years of operation on intermediate shell plate 88605-2 will be carried out. This revision should be performed with a benchmarked version of the DOT code and the additional conditions stated in the staff's Safety Evaluation contained in Enclosure 2 for Unit 2.

8807120375 880628 DR ADOCK 0500 g3

fir. H. B. Tucker June 28, 1988 In accordance sitF 10 CFR 50.61(b)(1), we request that you submit an update to the information previously provided whenever changes in core loadings, surveillance measurements, or other information indicate a significant change in projected reference temperature values. Such submittals could be made at the same time as the Pressure-Temperature operating l aits which are required by 10 CFR Part 50, Appendix G.

Sincerely, Original signed by:

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

Enclosures:

1. Safety Evaluation for Unit 1

2. Safety Evaluation for Unit 2 cc w/ enclosures:

See next page

. DISTRIBUTION:

Docket File ACRS (10)

NRC PDR L. Lois 8E-23 Local PDR P. Randall 9H-15 PDII-3 Reading R. Ferguson 13H-3 S. Varga 14-E-4 J. Stolz 13H-3 G. Lainas 14-H-3 CATAWBA READING D. Matthews M. Hodges 8-E-23 M. Rood C. Cheng 9-H-15 J. Hopkins E. Jordan HNBB-3302 B. Grimes 9-A-2 LA,: Pp[f;-3 PM:P I3 BC:SR E B  : DEST - 0 1-3 P 00 KJabbour:pw MHodges C he;g DMattpews

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Mr. H. B. Tucker June 28, 1988 l

In accordance with 10 CFR 50.61(b)(1), we request that you submit an update to l the information previously provided whenever changes in core loadings, surveillance measurements, or other information indicate a significant change in projected l reference temperature values. Such submittals could be made at the same time ,

as the Pressure-Temperature operating limits which are required by 10 CFR Part 1 50, Appendix G.

Sincerely, I

Original signed by:

1 Kahtan N. Jabbour, Project Manager  ;

Project Directorate II-3 l

Division of Reactor Projects I/II

Enclosures:

I

1. Safety Evaluation for Unit 1

2. Safety Evaluation for Unit 2 l cc w/ enclosures:

See next page DISTRIBUTION:

Docket File ACRS(10)

NRC PDR L. Lois 8E-23 Local PDR P. Randall 9H-15 PDII-3 Reading R. Ferguson 13H-3 S. Varga 14-E-4 J. Stolz 13H-3 G. Lainas 14-H-3 CATAWBA READING D. Matthews M. Hodges 8-E-23 M. Rood C. Cheng 9-H-15 J. Hopkins E. Jordan MNBB-3302

8. Grimes 9-A-2 l 1

l l

l 1

l l

LA,: PM:P I3 BC:SR E B  : DEST D I-3 P cod (f;-3 KJabbour:pw MHodges C he g CMat ews

/)]/88 f IC/88 & /88 () /L 88 h/)}/88

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

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

422 South Church Street 3400 Sumner Boulevard Charlotte, North Carolina 28242 P.O. Box 27306 Raleigh, North Carolina 27611 J. Michael McGarry,111, 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 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 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 Westinghouse Electric Corp. Mr. Heyward G. Shealy, Chief Mt:0 West Tower - Bay 239 Bureau of Raciological Health P.O. Box 355 South Carolina Depcrtment of Health Pittsburgh, Pennsylvania 15230 and Environmental Contfol 2600 Bull Street County Manager of York County Columbia, South Carolina 29201 York County Courthouse York South Catolina 29745 Karen E. Long Assistant Attorney General Richard P. Wilson, Esq. it.C. Department of Justice i Assistant Attorney General P.O. Box 629 l S.C. Attorney General's Office Raleigh, North Carolina 27602 l P.O. Box 11549 Columbia, South Carolina 29211 Spence Perry, Esquire l General Counsel '

Piedmont Municipal Power Agency Federal Emergency Management Agency 100 Memorial Drive Room 840 Greer, South Carolina 29651 500 C Street ,

Mr. IM:hael Hirsch Federal Emergency Management Agency Brian P. Cassidy, Regional Counsel Office of the General Counsel Federal Emergency Management Agency, Rocm 840 Region 1 500 C Street, S.W. J. W. McCormach POCH Washington, D. C. 20472 Boston, Massachusetts 02109 ,

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