ML20002D094
| ML20002D094 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 12/30/1980 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | Parris H TENNESSEE VALLEY AUTHORITY |
| References | |
| NUDOCS 8101190420 | |
| Download: ML20002D094 (3) | |
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DEC 3 01580 Docket No. 50-327 Nr. H. G. Parris IJanager of Perier Tenr asee Valley Authority 500A Chestnut Street Tovier II Chattanooga, Tennessee 37401
Dear Mr. Parris:
SUEJECT: SURVEILLAfdCE REQUIREVENTS 4.a.3.2.4 IN THE TECHNICAL SPECIFICATIONS In response to your October 9,1980 letter, you have correctly interpreted the second paragraph of Surveillance Requirement 4.4.3.2.4 of Appendix A to the Sequoyah Unit 1 Operating License flo. DPR-77.
If you are in COLD SEUT-COLTi for 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or more for any reason and you have not perfortred this surveillance in the previous six months, you are recuired to perform this surveillance before coing back into operation. Hewever, if you do not have to co into COLD SHUTDOWf! for 72 hcurs and it is six months or more since you last performed this surveillance, you do not have to take the plant dcun just to perform this surveillance.
Once ycu have successfully performed this surveillance three times, the over 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> in CCLD SEUTDOWfl and over six months since last surveillance criteria for determining when to do the next surveillance test are replaced with a simple criterion of elapsed time since last surveillance. The 36 month and 80 month intervals specified appropriately account for the fact that the surveillance can be scheduled to coincide with a scheduled refueling outage.
As stated in SR 4.4.3.2.4, a +12 month grace period is allowed for the 36 month intervals.
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An important point for you to recognize is that substantial time must elaspe between each surveillance before moving to a relaxed (longer) surveillance interval.
Thus, you trust allow at least six months to elapse between each l
surveillance until you have 3 successive tests with no unacceptable indica-tions.
TVA's inspection technique which the TVA indicated was identical to that of
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l Lambert, MacGill and Thomas, (LMT) except that a 2.25 MHz transducers is used l
rather that a 1.5 idiz transducers satisfies the intent of SR 4.4.3.2.4 since it is a state-of-the-art non-destructive examination (f'DE) technique for detecting intergranular stress corrosion cracking.
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H. G. Parris Pethcds of inservice I'DE for intergranular stress corrosion cracking of austenitic stainless steel are being evaluated at the NRC. Shculd other inspection methodology prove necessary tc ensure material inte~rity, the licerc.
vill be notified at that tice.
Sincerely, 2
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Rcbert L. Tedescc, Assistant Director for licensing Division of Licensing cc: See next page i
Mr. H. G. Parris Manager of Power Tennessee Valley Authority 500A Chestnut Street Tower II Chattanooga, Tennessee 37401 cc: Herbert S. Sanger, Jr., Esq.
General Counsel Tennessee Valley Authority 400 Commerce Avenue E llB 33 Knoxville, Tennessee 37902 Mr. H. N. Culver Tennessee Valley Authority 400 Commerce Avenue, 249A HBB Knoxville, Tennessee 37902 Mr. Bob Faas Westinghouse Electric Corporation P. O. Box 355 Pittsburgh, Pennsylvania 15230 Vr. Mark Burzynski fennessee Valley Authority 400 Chestnut Street Tower II Chattanooga, Tennessee 37401 Mr. J. F. Cox Tennessee Valley Authority 400 Commerce Avenue, W10C131C cyg Knoxville, Tennessee 37902 Resident Inspector /Sequoyah NPS c/o U.S. Nuclear Regulatory Commission P. O. Box 699 Hixson, Tennessee 37343 n.
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