ML20065D790
| ML20065D790 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 09/17/1982 |
| 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 8209300239 | |
| Download: ML20065D790 (2) | |
Text
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g y TENNESSEE VALLEY AUTHORITY -
CH ATTANOOGA, TENNESSEE 374ot H U2 400 Chestnut Street Tower II ca rm t> Z o
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September 17, 1982 m
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f BLRD-50-438/82-43
- p 73 BLRD-50-439/82-39 ca x2 G..
- w. 4 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 - SPENT FUEL POOL GATES -
BLRD-50-438/82-43, BLRD-50-439/82 FINAL REPORT The subject deficiency was initially reported to NRC-OIE Inspector Don Quick on June 1, 1982 in accordance with 10 CFR 50.55(e) as NCR BLN NEB 8005. This was followed by our first interim report dated July 2, 1982. Enclosed is our final report. This deficiency has also been reported for our Watts Bar and Sequoyah Nuclear Plants as NCRs WBN NEB 8005 and SQN NEB 8012.
If you have any questions concerning this matter, please get in touch with R. H. Shell at FTS 858-2688.
Very truly yours, 1
TENNESSEE VALLEY AUTHORITY i
l D SW 1
L. M. Mills, Manager Nuclear Licensing Enclosure l
cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement I
U.S. Nuclear Regulatory Comission Washington, D.C. 20555 N
9,tTIClM'CO 8209300239 820917 Tfs~
i PDR ADOCK 05000438 S
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An Equal Opportunity Employer
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ENCLOSURE BELLEFONTE NUCLEAR PLANT. UNITS 1 AND 2.
SPENT FUEL POOL GATES
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NCR BLN NEB 8005 BLRD-50-438/82-43, BLRD-50-439/82-39 i
FINAL REPORT Description of Deficiency The-four spent fbel pool gates (one to each transfer canal and one to each i
- cask loading area).were reanalyzed under new design. criteria (i.e., to seismic mquirements in accordance with Regulatory Guide 1.13) and found to be inadequate. The cause of this deficiency was the lack of adequate design criteria.
Safety Implications Structural failure of the gates during a seismic event could result. in damage to stored spent fbel elements. This-could result in radiation 3
levels in the spent fbel pool areas higher than those assumed in the plant
' safety analysis and thus could result in doses to-plant personnel and the public greater than has been analyzed.
j Corrective Action 4
TVA has reviewed the manufacturing records and inspection reports for the gates and has determined that they conformed to the initial design -
requirements. The gates were then analyzed to establish modification requirements to ensure that they will meet the requirements of Regulatory Guide 1.13.' - TVA will modify the gates, under ECN 1509, so they will meet.
l all the requirements of Regulatory Guide 1.13 This will eliminate the i
possibility of structural failure of the gates during a seismic event..To t -
prevent recurrence, TVA has written a generic design criteria for the subject gates incorporating these requirements.
The gates will be structurally reinforced and have two additional sets of re'straints in both the operating and stored positions. The design drawings have been mvised depicting the modifications. Work on the gates w.'11 be completed by February 28, 1983, for unit 1 and July 31, 1984, for uni.t 2.
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