ML20081D959
| ML20081D959 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 10/20/1983 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8311010409 | |
| Download: ML20081D959 (2) | |
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, t, TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374o1 fl00 Chestnut NSO[$erf)$,* q 7 O
October 20, 1983 3
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U.S. Nuclear Regulatory Commission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Mariett.a Street, NW, Suite 2900 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - BABC0CK & WILCOX'S NONCONSERVATIVE ANALYSIS OF NEUTRON FLUX - NCR BLN NEB 8007 - NINTH 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). Thiu was followed by our interim reports dated December 3,1980, March 30 and September 21, 1981, February 22, April 27, August 10, and November 16, 1982 and May 23, 1983. Enclosed is our ninth interim report. We considet-10 CFR Part 21 to be applicable to this deficiency. We expect to submit our next report by January 10, 1984.
e 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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. Mi11s, Manager Nuclear Licensing Enclosure oc (Enclosure):
Mr. Richard C. DeYoung, Director Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washine, ton, D.C.
20555 Bellefonte Project Services Babcock & Wilcox Company P.O. Box 1260 Lynchburg, Virginia 24505 Attention:
Mr. H. B. Barkley Records Center l
Institute of Nuclear Power Operations l
1100 Circle 75 Parxway, Suite 1500 Atlanta, Georgia 30339 8311010409 83!020 f
gDRADOCK05000 g:gJcJAL COPh 1983-TVA SOTH ANNIVERSARY Y6 M An Equal Opportunity Employer l
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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 hTB 8007 10 CFR 50.55(e)
NINTH INTERIM REPORT Description of Deficiency B&W's measurement errors assumed in determining Reactor Protection System (RPS) setpoints may be noncon ervative 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.
Interim Progress TV4 is still awaiting B&W's report resolving the subject deficiency.
TVA will provide more information upon receipt of the subject report.
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