ML20236Y403

Application for Amends to Licenses NPF-35 & NPF-52, Increasing Containment Integrated Leak Rate Permitted by Tech Spec 3.6.1.2 to 0.30% Per Day.Discussion & Analysis of Significant Hazards Considerations Encl.Fee Paid

ML20236Y403
Person / Time
Site:	Catawba
Issue date:	12/03/1987
From:	Tucker H DUKE POWER CO.
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
Shared Package
ML20236Y406	List: ML20236Y403 ML20236Y407
References
NUDOCS 8712110301
Download: ML20236Y403 (3)

Text

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Duxe Pow 1m GOMPANY P.O. HOX 33180 1 CHARLOTTE, N.O. 28242

.%LB. TUCKER TELEPHONE me paretserr (704) 073-4531 ninean amonwman i

December 3, 1987 _

U. S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, D. C. 20555 Re: Catawba Nuclear Station Docket Nos. 50-413 and 50-414 Technical Specification Amendment Containment Integrated Leak Rate i

Dear' Sir:

Attached are proposed license amendments to Facility Operating Licenses NPF-35 and NPF-52 for Catawba Nuclear Station Units 1 and 2, respectively.

The proposed amendment seeks to increase the containment integrated leak rate permitted by Technical Specification 3.6.1.2 to 0.30% per day from its current value of 0.20% per day. The proposed change is brought about by clearly allowing credit for iodine removal by containment spray and to increase the margin between the measured leak rate and the acceptance criteria for the test. The maximum integrated leak rate value is limited to 0.20% per day by the current Technical Specification to ensure that offsite radiation exposure does not exceed the reference values specified in 10 CFR 100.11.

Duke Power Company has recently revised the radiation exposure calculation for a design basis LOCA using the methodology prescribed in the latest revision of the Standard Review Plan (SRP), Section 6.5.2. The SRP now clearly allows credit for lodine removal during a LOCA by a boric acid containment spray system. Our calculation demonstrates that an increase in overall leakage rate to 0.30% per l day would be nearly offset by the iodine removal credit allowed in SRP Section f 6.5.2. Since noble gases are unaffected by containment sprays, there is an l increase in the whole body and skin doses. However, for Catawba thyroid exposure is the limiting criteria, and the whole body and skin doses are still well within l the values found in 10 CFR 100.11 and GDC 19. There is adequate technical justification to relax the current limit on the integrated leak rate to 0.30% por l day from its current value of 0.20% per day. l Attachment I contains the proposed changes to the Technical Specifications.

Attachment II provides a Discussion and Analysis of Significant Hazards l Considerations in support of the proposed changes. The analysis was performed pursuant to the requirements of 10 CFR 50.91 and concludes that the proposed changes to the Technical Specifications do not involve any Significant Hazards Considerations.

Attachment III provides marked-up pages from Chapter 15 of the Catat.ba FSAR which reflect the changes made in the design basis offsite dose analysis. k VSE NEQs /w/ Qfy

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b. ' S. Nuclear Regulatory Commission December 3, 1987 Page Two These changes will be incorporated into a future update of the Catawba FSAR.

This request involves one application for amendment to Catawba's Technical Specifications. Accordingly, pursuant to 10 CFR 170.21 a check for $150.00 is enclosed.

Pursuant to 10 CFR 50.91 (b) (1) the appropriate South Carolina State Official is being provided a copy of this amendment request.

Please note that this exact change has been reviewed and approved for our McGuire plant (see letter dated March 5, 1986 from Mr. B. J. Youngblood, NRC/NRR to Mr.

H. B. Tucker, Duke Power Company).

Please feel free to contact us if you require any additional information.

I Very truly yours, l

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Hal B. Tucker RWO/1054/sbn Attachment xc: Dr. J. Nelson Grace American Nuclear Insurers Regional Administrator, Region II c/o Dottle Sherman, ANI Library U. S. Nuclear Regulatory Commission The Exchange, suite 245 101 Marietta Street, NW, Suite 2900 270 Farmington Avenue Atlanta, Georgia 30323 Farmington, CT 06032 M&M Nuclear Consultants Mr. P. K. Van Doorn 1221 Avenue of the Americas NRC Resident Inspector New York, New York 10020 Catawba Nuclear Station Mr. Heyward Shealy, Chief INPO Records Center Bureau of Radiological Health Suite 1500 South Carolina Department of Health & 1100 circle 75 Parkway Environmental Control Atlanta, Georgia 30339 2600 Bull Street Colunbia, South Carolina 29201

U. S. Nuclear Regulatory Commission December 3, 1987 Page Three 1

HAL B. TUCKER, being duly sworn, states that he is Vice President of Duke Power Company; that he is authorized on the part of said Company to sign and file with I the Nuclear Regulatory Commission this revision to the Catawba Nuclear Station License Nos. NPF-35 and NPF-52; and that all statements and matters set forth therein are true and correct to the best of his knowledge.

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'Hal B. Tucker, Vice President Subscribed and sworn to before me this 3rd day of December, 1987.

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