ML20071H820
| ML20071H820 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 02/17/1982 |
| 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 8203080549 | |
| Download: ML20071H820 (2) | |
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h TENNESSEE VAgg. AUTHORITY
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T CH ATTANOOGA.? Whf ESS,qE,37401 l
400 Chestnut Street Tower II Nbr$ah:/1k,l 1982 S
e-BLRD-50-438/81-45 o>
BLhD-50-439/81-47 j
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l U.S.' Nuclear Regulatory Commission I,' R05 I
l Region II A
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Attn:
Mr. James P. O'Reilly, Regional Administrator D
101 Marietta Street, Suite 3100 p
Atlanta, Georgia 30303 4
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Dear Mr. O'Reilly:
I BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - DRESSER SAFETY VALVES -
BLRD-50-438/81-45, BLRD-50-439/81 SECOND 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 first interim report dated August 7, 1981. Enclosed is our second interim report. We expect to submit our next report by October 14, 1982. We consider 10 CFR Part 21 applicable to this deficiency.
If you have any questions concerning this matter, please get in touch with I
R. H. Shell at FTS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY L. M. Mills, nager Nuclear Regulation and Safety Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 Mr. James McFarland (Enclosure)
Senior Project Manager l
Babcock & Wilcox Company l
P.O. Box 1260 Lynchburg, Virginia 24505
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PDR ADOCK 05000438 0
An Equat Opportunity Er'nployer b
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j ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 DRESSER SAFETY VALVES BLRD-50-438/81-45, BLRD-50-439/81-47 10 CFR 50.55(e)
SECOND INTERIM REPORT Deteription of Deficiency A Dresser safety valve, model 31709NA, recently tested in EPRI's safety and rg, lief valve test program apparently suffered unacceptable internal damage during a full pressure steam test. The configuration m
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 L
the piping configuration or the valve is deficient. The Dresser valves are i
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 j
subsequently failed to close properly. Post test inspection of the valve indicated internal damage to components including galling of guide surfaces.
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Interim Progress r
4 TVA has received preliminary test data from the Electric Power Research Institute (EPRI) valve test program and is in the process of j
evaluating this data. TVA expects receipt of the final test report during July 1982.
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