ML20083A715
| ML20083A715 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 12/12/1983 |
| 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 8312200378 | |
| Download: ML20083A715 (2) | |
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. uO f TENNESSEE VALLEY AUTHORITY E dh*e"skOu$'dt'r"e 2 Yo"we'r E December 12, 1983
" BLRD-50-438/82-72
. BLRD-50-439/82-66
' U.S. Nuclear Regulatory Commission Region II.
Attn:-- Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, NW, Suite 2900
- Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - ROUTING OF MAKEUP TANK OUTLET LINES-I BLRD-50-438/82-72, BLRD-50-439/82 THIRD INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector C. W. Hehl on October 15, 1982 in.accordance with 10 CFR 50.55(e) as NCR BLN BLP 8228. This was followed by our interim reports dated Novsaber. 12, 1982 and March 22, 1983 Enclosed is our third interim report.- We expect to submit our next report by January 24, 1985.
' 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 L. M. Mills., Manager.
Nuclear Licensing Enclosure oc: Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S.' Nuclear Regulatory Commission Washington, D.C.-
20555
. Records Center-(Enclosure)
Institute 'of Nuclear Power Operations 1100 Circle 75 Parkway, Suite 1500 ~
Atlanta, Georgia 30339
-n OFFICIAL COPY
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 ROUTING OF MAKEUP TANK OUTLET LINES NCR BLN BLP 8228 BLRD-50-438/82-72, BLRD-50-439/82-66 10 CFR 50.55(e)
THIRD INTERIM REPORT Description of Deficiency The present routing of the Makeup and Purification System makeup tank outlet line to the train A makeup pumps will let dissolved gases (mainly hydrogen) come out of solution because of the pressure drop in the line and collect at the high point of the piping. The gas buildup will result in reduced net positive suction head available to the pumps and result in pump damage. The train A pumps are the only pumps affected by this condition.
Interim Progress Rerouting of the 4-inch makeup tank discharge piping to an elevation below the makeup tank water level has been completed. Drawings to reflect this change have been issued for construction. An associated 1-inch vent line has also been rerouted, and electrical cables have been rerouted due to relocation of motor-operated valves 1FCV-452A and
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VHAB-161. Analysis of the revised piping is in progress and hangers will be redesigned, if necessary, upon completion of the analysis.
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