ML20065R744
| ML20065R744 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 10/14/1982 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-82 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8210290324 | |
| Download: ML20065R744 (2) | |
Text
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- g TENNESSEE VALLEY AUTHORITY Q
'2 400 Chestnut Street Tower II 5
October 14, 1982 h
- w BLRD-50-438/81-45 F. .
o BLRD-50-439/81-47 i c L ~
U.S. N' clear Regulatory Commission
~
u 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 - DRESSER SAFETY VALVES -
BLRD-50-438/81-45, BLRD-50-439/81 THIRD INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector D. Quick on July 9, 1981 in accordance with 10 CFR 50.55(e) as NCR BLN NEB 8109. This was followed by our interim reports dated August 7, 1981 and February 17, 1982. Enclosed is our third interim report. We expect to submit our next report by April 11, 1983 We consider 10 CFR Part 21 applicable to this deficiency.
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 cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr. James McFarland (Enclosure)
Senior Project Manager Babcock & Wilcox Company P.O. Box 1260 Lynchburg, Virginia 24505 O
8210290324 821014 PDR ADOCK 05000438 4
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An Ecuai Opportunity EmNoyer
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ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 DRESSER SAFETY VALVES NCR BLN NEB 8109 BLRD-50-438/81-45, BLRD-50-439/81-47 10 CFR 50.55(e)
THIRD INTERIM REPORT Description of Deficiency A Dresser safety valve, model 31709NA, tested in Electric Power Research Institute's (EPRI's) safety and relief valve test program apparently suffered unacceptable internal damage during a full pressure steam test.
The configuration of piping associated with this valve is similar, but not identical, to that intended for use at Bellefonte; and at this time it is uncertain if the piping configuration or the valve is deficient. The Dresser valves are to be used at Bellefonte as pressurizer safety valves.
The valve was tested June 3,1981 with the valve set to open at 2480 psia.
The valve opened at 15 psi below this set point, chattered severely, and subsequently failed to close properly. Post test inspection of the valve indicated internal damage to components including galling of guide surfaces.
Interim Progress TVA has received the final series of reports and input from EPHI and B&W on the valve test program. TVA is evaluating this information for its applicability to Bellefonte and to determine the adequacy of the subject valves.
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