ML20093P117

Forwards Request & Justification for Relief from Hydrostatic Test Requirements in ASME Code,Section Xi,Summer 1978 Addenda.Expeditious Review Requested to Support Cycle 2 Refueling Outage Scheduled for 840908

ML20093P117
Person / Time
Site:	Sequoyah
Issue date:	07/30/1984
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	Adensam E Office of Nuclear Reactor Regulation
References
NUDOCS 8408030026
Download: ML20093P117 (2)

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q g TENNESSEE VALLEY AUTHORITY

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WChanatic"r"e"A*i"4e'r'Ti July 30, 1984 Director of Nuclear Remotor Regulation Attention: Ms. E. Adensam, Chief Licensing Branch No. 4 Division of Licensing U.S. Nuolear Regulatory Commiission Washington, D.C. 20555

Dear Ms. Adensas:

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In the Matter of ) Docket Nos. 50-327 Tennessee Valley Authority ) 50-328 In accordance with 10 CFR Part 50, enclosed is a request for relief, and a justification for the mlief, from the hydrostatio test requirements l specified in the 1977 Edition, Summer 1978 Addenda of Section XI of the ASPE Code. The mlief request is being submitted as a result of TVA's plan to mplace feedwater drain valves, 3-512, 3-513, 3-516, 3-517, 3-520, 3-521, 3-524, and 3-525. An expeditious review of this request is needed to support the forthcoming unit 2, oyole 2 refueling outage scheduled to begin September 8,1984.

If you have any questions concerning this matter, please ge in touch with Jerry Wills at FTS 858-2683.

Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, Mknsger Nuolear Licensing d subsor ed before me Sworn)t this ay of 1984 (Lhk M Thu Notary Publio My Commission Expires ['7 "d M 7] g Q jf Enclosure 00: U.S. Nuclear Regulatory Commission (Enclosure)

Region II Attn: Mr. James P. O'Reilly Administrator 101 Marietta Street, NW, Suite 2900 Atlantu, Georgia 30323 mwmagR p

An EquM Opportunity Employer

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ENCLOSURE

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s COMPO! TENTS Sequoyah Nuclear Plant units 1 and 2 feodwater systen. Installation of 2-inch bypass lines around 16-inch feedwater check valves 3-508, 3-509, .

3-510, and 3-511 (drawings attached) in accordance with TVA ECN L5024.

Replacement of 1-1/2-inch feedwater drain valves 3-512, 3-513, 3-916, 3-517, 3-520, 3-521, 3-524, and 3-525 (drawings attached). These valvos are to be installed by 1-1/2-inch sookot wolds.

CLASS TVA safety Class B, ANSI B31.7; ASME Class 2 equivalent.

INSPECTION REQUIREMENTS The code of record for repairs and replacements at Sequoyah is the 1980 Edition, Winter 1981 Addenda of ASME Scotion XI. This requires a hydrostatic pressure test of the replaced components. The pressuro test program is to the 1977 Edition, Summor 1978 Addenda and requires the hydrostatic pressure test be performed at 1.25 times the system pressure Pav.

BASIS _FOR RELIEF To accomplish the hydrostatio prosaure test would require flooding the secondary side of each steam generator along with the 32-inch main steam lines to the outbcard isolation valves. The main steam safety and power-operated relief valves would also require gagging to perform the tost. The number of sucondary si.le hydrostatic pressure tests allowed by the plant technical specificati ons (Scotton 5.7, Tablo 5.7.1) is 5. This does not allow for hydrostatio pressure tests other than the normally scheduloi ones. It is our opinion that a significant incronan in safety would not result frcm the hydrostatic pressure test over proposed alternate inspection below.

ALTERNATE INSPECTION In addition to the constrtuotton code, (B31.7,1969 Edition, Summor 1970 Addanda) surface examination of the wolds, an in-sorvion leak check of the subject wolds will be performad at operating pressure during startup from the outage in which the replacement is mado. The regularly scheiuled system hydrostatic prosauru tost should be performed in 1939-1990 for unit 1 and 1990-1991 fer unit 2.

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