ML20043G454

Application for Amends to Licenses NPF-35 & NPF-52,revising Tech Spec 4.9.11.2 to Reflect Heater Power Dissipation Using Lowest Postulated Voltage Conditions.Application Suppls Previous Applications

ML20043G454
Person / Time
Site:	Catawba
Issue date:	06/04/1990
From:	Tucker H DUKE POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20043G455	List: ML20043G454 ML20043G456
References
NUDOCS 9006200319
Download: ML20043G454 (2)

Text

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DUKEPOWER June 4, 1990 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555

Subject:

Catawba Nuclear Station, Units 1 and 2 Docket Nos. 50-413 and 50-414 Proposed Technical Specification Amendment Technical Specification 4.9.11.2 Gentlemen:

My letter dated April 23, 1990 submitted a Proposed Technical Specification (TS) amendment to TS 4.9.11.2. This change will require laboratory testing of the carbon samples from the Fuel Handling Ventilation Exhaust System (VF) per ASTM D3803-86 Test Method "A", for a methyl iodido penetration of less than 0.71%. This submittal was supplemented on May 17, 1990, making administrative changes, and limiting the time of approval for the amendment to August 26, 1991. This letter supplements my previous submittals referenced above.

Because of postulated low voltage, which has made it necessary to change the laboratory test method for carbon adsorber sampics, it is also necessary to change the VF system heater powe* dissipation test. The existing TSs require a VF system flow of 15,565 cfmi 10% and a heater dissipation of 801 BKW (TS 4.9.11.2.d.4). The heater dissipation requirement will be changed to 80 + 8KW/-17.3KW. These numbers are based on the postulated low voltage condition, with a corresponding heater capacity decrease. As stated in my previous submittal, the maximum expected relative humidity under the worst case of highest flow and lowest voltage is 74%. The laboratory test of carbon samples will be conservatively tested per ASTM D3803-86, Test Method "A" which uses a relative humidity of 95%.

This change to TS 4.9.11.2.d.4 reflects the heater power dissipation using the lowest postulated voltage conditions. My previous submittal, referenced above, changes the laboratory test method to ensure that offsite and onsite doses are not adversely affected. The analysis in my previous submittal remains valid. This proposed change involves no significant hazards considerations.

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.- Page 2 please find attached the marked up TS page. The change is made on a copy of the page sutaitted May 17, 1990 so it includes all changes requested to this l page. A note was added to make this change apply until August 26, 1991, as  !

van discussed upon with the NRC staff in my May 17, 1990 sutaittal.  !

Very truly yours, f

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/  :

llal B. Tucker MIDl/43/lcs xc: Mr. S. D. Ebneter, Regional Administrator  !

U. S. Nuclear Regulatory Consission Region II l 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Mr. lleyward Shealy, Chief '

Bureau of Radiological llealth '

South Carolina Department of flealth &

Environmental Control i 2600 Bull Street Columbia, South Carolina 29201 American Nuclear Insurers ,

Dottie Sherman, ANI Library The Exchange, Suite 245 270 Farmington Avenue "

Farmington, CT 06032 P

M & M Nuclear Consultants 1221 Avenue of the Americas New York, New York 10020 INit Records Center Suite 1500 1100 circle 75 Parkway Atlanta, Georgia 30339 Mr. W. T. Orders NRC Resident Inspector Catawba Nuclear Station Dr. K. N. Jabbour Office of Nuclear Regulation U. S. Nuclear Regulatory Commission One White Flint North Mail Stop 141125 Washington, D.C. 20555

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