ML20082T507
| ML20082T507 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 12/08/1983 |
| 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, NCR-2517, NUDOCS 8312160037 | |
| Download: ML20082T507 (2) | |
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14WSsEOEt StNetloEeEII' December 8, -1983 BLRD-50-438/83-59
_ BLRD-50-439/83-52 f
U.S. Nuclear Regulatory Commission Region II 4.
Attn:,Mr. James P. O'Reilly, Regional Administrator.
4:
101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30303-
Dear Mr.-O'Reilly:
'BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 -DEFICIENT SQUARE ROOT EXTRACTOR 4
MODULES FOR~ REACTOR PROTECTION SYSTEM BY BAILEY. METER COMPANY
- BLRD-50-438/83-59, BLRD-50-439/83 FIRST INTERIM REPORT 1
The subject deficiency was initially reported to NRC-0IE ~ Inspector
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Linda Watson on November 14, 1983-in accordance with 10 CFR 50.55(e) as NCR..
2517. Enclosed is our first' interia report. We expect.to. submit our next report by February 23, 1984. - We consider 10 CFR Part 21.' applicable to this deficiency..
If you have any questions, please get:in touch with.R. H. Shell'at FTS 858-2688.
- Very truly yours, TENNESSEE VALLEY AUTHORITY-
..L. M. Mills, Manager-Nuclear Licensing Enclosure
- cci Mr. Richard C. DeYoung, Director (Enclosure)
- Office of; Inspection. and Enforcement -
U.S. Nuclear Regulatory Commission.
j Washington, D.C.
20555 i-Records Center (Enclosure) ~
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Institute of-. Nuclear. Power Operations -
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8312160037 831208
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 DEFICIENT SQUARE ROOT EXTRACTOR MODULES FOR REACTOR PROTECTION SYSTEM BY BAILEY METER COMPANY BLRD-50-438/83-59, BLRD-50-439/83 NCR 2517 10 CFR 50.55(e)
FIRST INTERIM REPORT Description of Deficiency Square root extractor modules were returned to the manufacturer, Bailey Meter Company, Wickliffe, Ohio, for rework to incorporate Babcock & Wilcox (B&W) field change package (FCP) No. 54. The rework was to add an enhanced input filter which would help to suppress turbulence-induced noise in the reactor protection system (RPS) measurement of reactor coolant system (RCS) ' flow, and thus, increase overall accuracy of the flow measurement.
When the reworked modules were returned from Bailey to the site, it was discovered that the module subcircuit board retaining hardware was loose, missing, or improperly installed.
The cause of the deficiency is not known at this time.
Interim Progress TVA's recommended disposition for this NCR is to return the modules to Bailey for rework. The NCR has been forwarded to B&W by TVA lotter-K-8028, for B&W's review and recommended disposition. B&W's. response ~
is to include enough information to determine root cause, corrective action, and action to prevent recurrence.. After receipt'and review of B&W's reply TVA will provide more information.
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