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 Wednesday, March 24, 2021