Part 21 Report - 1996-612

ACCESSION #: 9610160080 TVA Tennessee Valley Authority, Post Office Box 2000, Hollywood, Alabama 35752 September 20, 1996 U. S. Nuclear Regulatory Commission 10 CFR 50.55(e) ATTN: Document Control Desk Washington, DC 20555 Gentlemen: In the Matter of the Application of) Docket Nos. 50-438 Tennessee Valley Authority ) 50-439 BELLEFONTE NUCLEAR PLANT (BLN) UNITS 1 AND 2 - POTENTIAL DEFECT OF STARTING AIR ADMISSION VALVES - PROBLEM EVALUATION REPORT (PER) BLP960034 - BLRD-50-438/96-01 / BLRD50- 439/96-01 The subject deficiency is determined reportable in accordance with 10 CFR 50.55 (e) and is documented in Problem Evaluation Report (PER) BLP960034. Enclosed is TVA's interim report on the subject. Should there by any questions regarding this matter, please telephone J. E. Blackburn, Acting Nuclear Assurance & Licensing Manager at (205) 574- 8058. Sincerely, N. C. Kazanas General Manager Enclosure cc: See page 2 U. S. Nuclear Regulatory Commission Page 2 September 20, 1996 cc (Enclosure): Mr. P. E. Fredrickson U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Mr. M. C. Thadani, Project Manager U. S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 ENCLOSURE 1 BELLEFONTE NUCLEAR PLANT (BLN) - UNITS 1 AND 2 POTENTIAL DEFECT OF STARTING AIR ADMISSION VALVES PROBLEM EVALUATION REPORT (PER) BLP960034 BLRD-50-438/96-01 AND BLRD-50-439/96-01 INTERIM REPORT Description of Deficiency The potential defect concerns the Emergency Diesel Generator(s) starting air admission valves as identified by Cooper Energy Services under 10 CFR 21 and the NRC Event Number 30728. A total of sixteen (16) valves are affected at the TVA Bellefonte Nuclear Plant by this notification. A malfunction of the starting air admission valves upon receipt of a start signal could prevent availability of the essential Emergency Diesel Generator(s) (EDG). Safety Implications The failure of the valves to fully open could potentially prevent of the EDG(s) from starting. Such a failure could create a substantial safety hazard due to a major reduction in the availability of plant safety systems. Interim Progress TVA will conduct an evaluation of the vendors recommended corrective action and determine appropriate corrective action. A final report concerning final disposition of the reported potential defect will be provided no later than six months prior to initial fuel loading. *** END OF DOCUMENT ***

Page Last Reviewed/Updated Friday, January 31, 2020