ML20129D256

Application for Amends to Licenses DPR-77 & DPR-79,removing Existing Footnotes That Limit Application of Apc for Plant SG Tubes to Cycle 8 Operation for Both Units

ML20129D256
Person / Time
Site:	Sequoyah
Issue date:	10/18/1996
From:	Shell R TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20129D262	List: ML20129D256 ML20129D266
References
NUDOCS 9610240245
Download: ML20129D256 (3)

Text

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n IM Tennessee Valley Authonty Post Office Box ?000 Soddy Da sy. Tennessee 37379 October 18, 1996

, TVA-SON-TS-96-05 10 CFR 50.90 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen:

In the Matter of ) Docket Nos. 50-327 Tennessee Valley Authority ) 50-328 SEQUOYAH NUCLEAR PLANT (SON) - TECHNICAL SPECIFICATION (TS)

CHANGE 96-05, " ELIMINATION OF CYCLE 8 LIMITATION FOR STEAM GENERATOR (S/G) ALTERNATE PLUGGING CRITERIA (APC)"

References:

1. TVA letter to NRC dated September 7,1995, "Sequoyah Nuclear Plant (SON) - Technical Specification (TS) Change 95-15, ' Alternate Plugging Criteria For Steam Generator (S/G) Tubing - Unit l'"

2. TVA letter to NRC dated December 12,1995, "Sequoyah Nuclear Plant (SON) - Technical Specification (TS) Change 95-23, ' Alternate Plugging Criteria (APC) For Steam Generator (S/G) Tubing - Unit 2'"

3. TVA letter to NRC dated March 4,1996, "Sequoyah Nuclear Plant (SON) - NRC Request for Additional Information - Technical Specification (TS) Change 95-23, ' Alternate Plugging Criteria (APC) for Steam Generator (S/G) Tubing - Unit 2'"

In accordance with 10 CFR 50.90, we are enclosing an amendment to Licenses DPR-77 and DPR-79 to change the TSs of SON Units 1 and 2. The proposed change removes existing footnotes that limit application of APC for SON's S/G tubes

$ to Cycle 8 operation for both units. Removal of these footnotes provides generic application of APC for SON beyond Cycle 8 operation. Note that TVA's commitments o and responses to Generic Letter 95-05 as contained in the referenced letters remain g unchanged.

7 By the Reference 3 letter, TVA addressed three items in response to NRC questions h 'goncerning TVA's Reference 2 amendment request. A summary of the items g g4 O

addressed in the letter are as follows: f.

M N

1. TVA provided a copy of the current crack growth data from the EPRI database entitled, "EPRI ARC Database for 3/4 inch and 7/8 Inch Diameter Tubes and \

Updated ARC Correlation for 7/8 inch Diameter Tubes." This data \

, S.

s U.S. Nuclear Regulatory Commission Page 2 October 18, 1996 was requested by NRC to support review of TVA's crack growth-rate estimates from SON's Unit 2 Cycle 7 S/G inspections.

2. TVA provided test data to support TVA's commitment for implementing GL 95-05.

TVA's commitment addressed item 3.b.3 of GL 95-05. The commitment statement reads: "Axialindications in dents less than 5 volts that are structurally significant will be detected with bobbin coil ..."

3. TVA provided its plan for submitting a license amendment for permanent application of APC to Units 1 and 2 following final resolution of the probe wear and probe variability issues within the nuclear industry.

With regard to the items above, it should be noted that TVA intends to apply this information to Unit 1 since these issues were addressed in response to TVA's TS amendment request for SON Unit 2.

The proposed TS change is identified in Enclosure 1. The justification for the proposed TS change is provided in Enclosure 2. A proposed determination of no significant hazards consideration performed pursuant to 10 CFR 50.92 is provided in Enclosure 3.

Enclosure 4 provides the retyped pages for the proposed TS change.

NRC approval of this TS change is requested by January 1997 to support plant operation beyond the Unit 1 Cycle 8 refueling outage that is currently scheduled for March 1997. The basis for this amendment request is recent industry resolution of the probe wear and probe variability issues.

TVA requests a 45-day implementation period for this TS change following issuance.

Please direct questions concerning this issue to D. V. Goodin at (423) 843-7734.

Sincerely, ktY-R. H. Shell Manager SON Site Licensing Sworn to and subscribed before me this /fY day of /> hl*J 1996 JDnh> b' "k&w)

N'otary Public My Commission Expires lif. A/. /196 I

Enclosures cc: See page 3

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I s 1 U.S. Nuclear Regulatory Commission -

j Page 3 1 October 18, 1996 i

(Enclosures)

Mr. R. W. Hernan, Project Manager Nuclear Regulatory Commission

One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852-2739 Mr. Michael H. Mobley, Director (w/o Enclosures)

Division of Radiological Health 3rd Floor L & C Annex 401 Church Street Nashville, Tennessee 37243-1532 NRC Resident inspector Sequoyah Nuclear Plant j 2600 Igou Ferry Road Soddy-Daisy, Tennessee 37379-3624 i Regional Administrator ,

U.S. Nuclear Regulatory Commission  !

Region 11 101 Marietta Street, NW, Suite 2900 i Atlanta, Georgia 30323-2711 2

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