ML20028D305
| ML20028D305 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 01/07/1983 |
| 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 8301170306 | |
| Download: ML20028D305 (2) | |
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TENNESSEE VALLEY AUTHORITY CH ATTANOOG A TENNESSEE 37401
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400 Chestnut Street Tower II January 7, 1983 S U ' 10 PQ
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,0 BLRD-50-438/82-25 BLRD-50-439/82-22 U.S. Nuclear Regulatory Commission Region II Attn:
Mr. James P. O'Reilly, Regional Administrator 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - INCORRECT INSTALLATION OF PRESSURE RELIEF AND SAFETY VALVES - BLRD-50-438/82-25, BLRD-50-439/82 THIRD INTERIM PEPORT The subject deficiency was initially reported to NRC-0IE Inspector Don Quick on March 5,1982 in accordance with 10 CFH 50.55(e) as NCR BLN BLP 8210. This was followed by our interim reports dated April 2 and July 13, 1982. Enclosed is our third interim report. We expect to submit our next report by June 20, 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 L. M. Mills, knager Nuclear Licensing Enclosure Mr. Richard C. DeYoung, Director (Enclosure) cc:
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555
' i TMI. COPY'i 8301170306 G30107
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PDR ADOCK 05000439 s
S PDR An Eaual Occortunitv Emninver
ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 INCORRECT INSTALLATION OF PRESSURE RELIEF AND SAFETY VALVES NCR BLN BLP 8210 BLRD-50-438/82-25, BLRD-50-439/82-22 10 CFR 50.55(e)
THIRD INTERIM REPORT Description of Deficiency Condition I - The two relief valves on the component cooling water supply lines to the shell side of the letdown coolers discharge into a common waste disposal drain header. The waste disposal header is not sized to accommodate both relief valses. Also, there are several other smaller relief valves discharging into this same waste disposal header. This condition applies to units 1 and 2.
Condition II - Two relief valves on the component cooling water piping for the coolers to reactor coolant pump P1 A1 discharge into a common line which is sized too small to accommodate both relief valves. This cendition applies to unit 1 only.
These conditions violate ASME Code Section III, Division I, ND-3677.3d(2).
Interim Progress Condition I - TVA has reevaluated the solution to this problem. Instead of replacing one of the six-inch relief valves with a smaller relief valve as proposed in the second interim report, TVA has decided to exhaust both six-inch relief valves to containment atmosphere and add two three-inch relief valves that would empty into the waste disposal header. The three-inch relief valves would be set at a lower set. pressure than the six-inch relief valves. With this arrangement, the smaller relief valves will be adequate for small tube break in the letdown coolers and the large relief valves will be adequate for the maximum design break.
TVA is proceeding with the solutions as described above. The design criteria and physical piping drawings have been rescheduled to be issued by January 7, 1983 The support analysis is scheduled for completion by April 1983 Condition II - The size of the common drain line from the two relief valves will be increased to accommodate flow from both relief valves.
The design criteria and physical piping drawing have been rescheduled to be issued by January 7,1983 4
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