ML18039A521

Discusses Review of TVA Insp & Repair Plan for Core Spray Internal Piping.Confirms Scope of Request as Discussed in 980917 Telcon Between Browns Ferry Nuclear Plant & NRC Representatives

ML18039A521
Person / Time
Site:	Browns Ferry
Issue date:	09/24/1998
From:	De Agazio A NRC (Affiliation Not Assigned)
To:	Scalice J TENNESSEE VALLEY AUTHORITY
References
TAC-MA1970, TAC-MA3610, NUDOCS 9809280050
Download: ML18039A521 (10)

Text

CATEGORY 2 REGULA'Y INFORMATION DISTRIBUTION SYSTEM,(RIDS)

ACCESSION NBR:9809280050 DOC.DATE: 98/09/24 NOTARIZED:"NO FACIL:50-296 Browns Ferry Nuclear Power Station, Unit 3, Tennessee AUTH.NAME AUTHOR AFFILIATION DE AGAZIO,A.W.

RECIP.NAME RECIPIENT AFFILIATION SCALICE,J.A.

Tennessee Valley Authority

SUBJECT:

Discusses review of TVA insp S repair plan for core spray internal piping. Confirms scope of request as discusses at 980917 telcon between Browns Ferry Nuclear Plant

& NRC representatives.

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NOTE TO ALL "RIDS" RECIPIENTS:

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UNITED,STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 205Ri-0001 Septanber 24, 1998 4

Mr. J. A.. Scalice Chief Nuclear Officer and Executive Vice President Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, Tennessee 37402-2801

SUBJECT:

BROWNS FERRY NUCLEAR,PLANT, UNIT3-REVIEW OF TVA'NSPECTION AND,REPAIR*PLANFOR CORE SPRAY INTERNALPIPING (TAC NOS. MA1970 AND MA3610)

Dear Mr. Scalice:

.By letter, dated September 16, 1998, the Nuclear Regulatory Commission (NRC) staff informed the Tennessee Valley Authority (TVA)that the proposed inspection.and repair plan for the core spray system piping internal to the reactor pressure vessel, that is to be performed during the Unit 3 Cycle 8 refueling outage, was acceptable because'the inspection plan meets the guidelines in BWRVIP-1 8,,and the repair willfollowthe guidelines in BWRVIP-16. The staff, however, requested TVAto provide, prior to implementation of-the proposed repair, additional information regarding the plant-specific design and installation details.

This impending request was discussed during the month of August with Mr. Tim Abney.

He expressed belief,that the type of information to be requested would be readily available.

However, because of delay in issuing the formal request, it did not reach TVAuntil quite close to the start:of the Unit 3 refueling outage.

On September 17, 1998, a teleconference was held between Browns Ferry Nuclear Plant and NRC representatives to clarify the scope of the request.

The following confirms the scope of the request as discussed:

(1)

Selection of materials, including material specifications, material conditions and'any other specific property/heat treatment/testing requirements to ensure its resistance to intergranular stress-corrosion cracking (IGSCC);

(2)

Fabrication of repair components, including practices to minimize'its susceptibility to IGSCC, such as control of machining, practices to minimize the component surface cold

.work and application of solution annealing after machining; (3)

Sequences and methods of installing repair components, including practices and plan(s) to control and retrieve potential debris and loose parts;,

(4)

Methods of post installation inspection to ensure. the repair components are properly installed;

'9809280050

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Mr. J. A. Scalice Septeaiber 24, 1998 (5)

Method of future reinspection to ensure structural integrity and tightness of.the repaired components particularly in the areas of replacement anchorage, threaded joints and crevices; (6) A summary of the fatigue evaluation of the replacement components in accordance with the design criteria outlined in Sections 7.6 and 7.10 of the BWRVIP-16. The summary should be detailed enough to indicate the calculational methodology and compliance with acceptance criteria.

On September 21, 1998, TVA's response, dated September 19, 1998, was received.

The staff is reviewing the information provided and anticipates completing the review within 30 days.

However, as confirmed in the teleconference, the NRC understands and agrees that the repairs are being performed pursuant to the provisions of 10 CFR 50.59, and therefore, TVAmay proceed with the effort in accordance with the outage schedule.

It is not the intent of the NRC that-this request and subsequent review have any impact whatsoever upon TVA's implementation schedule for the proposed inspection and repair effort.

Sincerely, 0riginal signed by:

Albert W. De Agazio, Sr. Project Manager Project Directorate II-3 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Docket No. 50-296 Serial No. BFN-98-026 cc: See next page U 0 Docket File

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Mr. J. A. Scalice Tennessee Valley Authority BROWNS FERRY NUCLEAR PLANT Senior Vice President Nuclear Operations Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN, 37402-2801 Mr. Jack A. Bailey, Vice President Engineering 8 Technical Services Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. C. M. Crane, Site Vice President

,Browns Feny Nuclear Plant Tennessee Valley Authority P.O; Box 2000 Decatur, AL 35609 General Counsel Tennessee Valley Authority, ET 10H 400 West Summit Hill Drive Knoxville, TN 37902 Mr. Raul R. Baron, General Manager Nuclear Assurance Tennessee Valley Authority 5M Lookout'Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Karl W. Singer, Plant Manager Browns Ferry Nuclear Plant Tennessee Valley,Authority P.O. Box 2000 Decatur, AL 35609 Mr. IVlark J. Burzynski, Managar Nuclear Licensing Tennessee Valley Authority 4X'Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801 Mr. Timothy E. Abney, Manager Licensing and Industry Affairs Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL35609 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 61 Forsyth Street, SW., Suite 23T85 Atlanta, GA 30303-3415 Senior Resident Inspector U.S. Nuclear Regulatory Commission Browns Ferry Nuclear Plant I0833 Shaw Road Athens, AL35611 State Health Officer Alabama Dept. of Public Health 434 Monroe Street Montgomery, AL36130-170I Chairman Limestone County Commission 310 West Washington Street Athens, AL 35611

Mr. J. A. Scalice (5)

Method of future reinspection to ensure structural integrity and tightness of the repaired components particularly in the areas of replacement anchorage, threaded joints and crevices; (6) A summary of the fatigue evaluation ofge replacement components in accordance with the design criteria outlined in Sections 7.6 and 7.10 of the BWRVIP-16. The summary should be detailed enough to indicate the caiculational methodology and compliance with acceptance criteria.

On September 21, 1998, TVA's response, dated September 19, 1998, was received.

The staff is reviewing the information provided and anticipates completing the review within 30 days.

However, as confirmed in the teleconference, the NRC understands and agrees that the repairs are being performed pursuant to the provisions of 10 CFR 50.59, and therefore, TVAmay proceed with the effort in accordance with the outage schedule.

It is not the intent of the NRC that this request and subsequent review have any impact whatsoever upon TVA's implementation schedule for the proposed inspection and repair effort.

Sincerely, Albert e Agazio, Sr. Project Manager Project Directorate II-3 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Docket No. 50-296 Serial No. BFN-98-026 cc: See next page-

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