ML20071M386
| ML20071M386 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 05/23/1983 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-83 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8305310214 | |
| Download: ML20071M386 (2) | |
Text
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TENNESSEE VALLEY AUTHORITY h
CH ATTANOOG A. TENNESSEE 37401 400 Chestnut Street Tower II wu May 23, 1983 y
ri' d
U.S. Nuclear Regulatory Commission Region II 3
yg Attn:
Mr. James P. O'Reilly, Regional Administrator o
ao 101 Marietta Street, NW, Suite 2900 TZ Atlanta, Georgia 30303 y-
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UhITS 1 AND 2 - BABCOCK & WILC0X'S NONCONSERVATIVE ANALYSIS OF NEUTRON FLUX - NCR BLN NEB 8007 - EIGHTH INTERIM REPORT On November 5,1980, R. W. Wright, NRC-0IE Region II, was informed that the subject nonconformance was determined to be reportable in accordance with 10 CFR 50.55(e). This was followed by our interim reports dated December 3, 1980, March 30 and September 21, 1981, and February 22, April 27, August 10, and November 16, 1982. Enclosed is our eighth interim report. We consider 10 CFR Part 21 to be applicable to this deficiency.
We expect to submit our next report by October 24, 1983 If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY
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I, L
M. Mills, Panagdr Nuclear Licensing Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr. R. J. Ansell (Enclosure)
Bellefonte Project Services Babcock & Wilcox Company P.O. Box 1260 Lynchburg, Virginia 24505 Records Center (Enclosure)
' Institute of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 Atlanta, Georgia 30339 iG.u.COf k 1
B305310214 030523 PDR ADOCK 05000438 S
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 BABCOCK AND WILCOX'S (B&W) NONCONSERVATIVE ANALYSIS OF NEUTRON FLUX NCR BLN NEB 8007 10 CFR 50.55(e)
EIGHTH INTERIM REPORT Description of Deficiency B&W's measurement errors assumed in determining Reactor Protection System (RPS) setpoints may be nonconservative under specific plant conditions. These errors may allow operation outside the established safety limits in certain design basis events.
The events of concern are: small overcooling and small steam line break; large steam line break in containment; and the rod ejection accident.
j Interim Progress TVA is still awaiting the results of B&W's analysis to show that the neutron flux error is within limits and does not present a safety concern. B&W's schedule for the analysis completion has recently slipped because B&W has discovered a new " worst case" condition which must be taken into account. TVA will provide more information upon receipt of the subject analysis.
I I
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