ML20155A132
| ML20155A132 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 09/26/1988 |
| From: | Gridley R TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| IEB-88-005, IEB-88-5, NUDOCS 8810050217 | |
| Download: ML20155A132 (7) | |
Text
s TENNESSEE VALLEY AUTHORITY CHATTANOOGA, TENNESSEE 3740t SN 1578 Lookout ? lace SftP 261986 U.S. Nuclear Regulatory Commission ATTN:
Document Control Desk Hashington, D.C.
20555 Gentlemen:
In the Matter of
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Docket Nos. 50-327 Tennessee Valley Authority
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50-328 SEQUOYAH NUCLEAR PLANT (SQN) - NRC BULLETIN 88-05 SUPPLEMENTAL INFORMATION
Reference:
TVA letter to NRC dated August 25, 1988, "Browns Ferry Nuclear Plant (BFN) Units 1, 2, and 3 and Sequoyah Nuclear Plant (SQN) Units 1 and 2 - NRC Bulletin 88 Nonconforming Materials Supplied By Piping Supplies, Incorporated (PSI), At Folsom, New Jersey, and West Jersey Manufacturing Company (HJM) at Hilliamstown, New Jersey" TVA presented information to NRC during a meeting on September 13, 1988, regarding the results to date of our inspections for potentially nonconforming materials supplied by Piping Supplies, Incorporated (PSI),
and Hest Jersey Manufacturing Company (HJM).
The handouts used in that presentation are enclosed.
TVA has identified five vendors that provided HJM or PSI material to SQN:
M. H. Kellogg; Dubose Stee'. Inc.; Capitol Pipe and Steel Products Company; National Valve Company; and Hub, Inc. All HJM and PSI material records retrieved to date are for carbon steel flanges, with the majority being two inches or less in size.
HJM and PSI material has been found acceptable for the intended application because all flanges tested and reported by Nuclear Management and Resources Council (NUMARC) have met American National Standards Institute (ANSI) 816.5 dimensional requirements, and most material shows tensile strengths greater than 70,000 pounds per square inch. A safety factor of approximately 6 is present even with the minimum reported tensile strength of approximately 40,000 pounds per square inch.
TVA will continue to work with vendors to identify HJM or PSI material delivered to SQN.
TVA will act on new information as it becomes available and will follow the reporting requirements of item 1 to Bulletin 88-05, supplement 1.
8810050217 000926
/
[lf PDR ADOCK 05000337 a
PNU i
An Equal opportunity Employer
U.S. Nuclear Regulatory Commiss:c, 8EP 261988 Please direct questions concerning this issue to H. J. Burzynski at (615) 870-6172.
Very truly yours, TENNESSEE VALLEY AUTHORITY R. Gridley, Manager Nuclear Licensing and Regulatory Affairs Enclosure cc (Enclosure):
Ms. S. C. Black, Assistant Director for Projects TVA Projects Division U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. F. R. McCoy, Assistant Director for Inspection Programs TVA Projects Division U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NH, Suite 2900 Atlanta, Georgia 30323 Sequoyah Resident Inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy Daisy, Tennessee 37379 A
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5 ENCLOSURE SQN BULLETIN 88 SUPPLEMENTAL INFORMATION l.
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NR0 BULI.ETIN 88-05 SQN RESULIS 10 DAIE
'FivevendorsprovidedWJMorPSImaterialtoSQN(Kellogg,NationalValve, Capitol Pipe and Sta! Products, Dubose Steel, and hb). Awaiting responsestoinquiriesfrom11othervendorsformaterialprovidedafter construction, j
' All WJM and ?SI material records retrieved thus far are for flanges l
(orifice, blind,andweldneck).Sizesrangefrom1to14 inches,witha majoritybeing2inchesorless.
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'Allfittingsidentifiedtodatearecarbonsteel(approximately580),
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' Carbon steel fittings are prohibited from use in systems containing boric acid.
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' IVA continuing to work with vendors to identify WJM or ?SI material deliveredtoSQN, 1
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IECENICAL EVAL 2ATION OF FIRES
' Based on ANSI B16,5 criteria, flanges are normally designed to be thicker thanadjoiningpiping,whichresultsinlowstressfactors.
- The WJM flanges have been shown to meet ANSI B16,5 dimensional requirements.
' The minimum tensile value to date for WJM material is 40,000 pounds per squareinch(psi),whichgivesasafetyfactorofapproximately6.
' Most material has shown tensile strength greater than 70,000 psi (ND! ARC testreport),whichgivesasafetyfactorofatleast10,
- WJM material has been found acceptable for intended application,
LABORATORY TENSlLE RESULTS 45
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CASES 20 15<-
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TENS!LE STRENGTH (KSI) l Data as cf
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!.AWCRY UN5ILI RES'A75 l
NORRC letter to NRC dated July 29. 1985 (included in supplement 2 to Bulletin SS-05)
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