ML20054M082
| ML20054M082 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 07/02/1982 |
| 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 8207090227 | |
| Download: ML20054M082 (2) | |
Text
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TENNESSEE VALLEY AUTHORITY il?O p CH ATT A NOO". A, TEN N ESSE E 37401
,s 400 Chestnut Street Tower II July 2, 1982 6
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BLRD-50-438/82-42 BLRD-50-439/82-38 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 - EVALUATION OF FLANGE JOINTS -
BLRD-50-438/82-42, BLRD-50-439/82 FIRST INTERIM REFORT The subject deficiency was initially reported to NRC-0IE Inspector R. V. Crlenjak on June 1, 1982 in accordance with 10 CFR 50.55(e) as NCR BLN CEB 8205. Enclosed is our first interim report. We expect to submit our next report by November 20, 1982. This deficiency has also been reported for Watts Bar Nuclear Plant as NCR WBN CEB 8218.
If you have any questions concerning this matter, please get in touch with R. H. Shell at FIS 858-2688.
Very truly yours, TENNESSEE VALLEY AUTHORITY as W L. H. Mills, Manager Nuclear Licensing Enclosure cc:
Mr. Richard C. DeYoung, Director (Enclosure)
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 pQ
$& D-f 8207090227 820702 DR ADOCK 05000 An Equal Opportunity Employm
ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 EVALUATION OF FLANGE JOINTS NCR BLN CEB 8205 BLhD-50-438/82-42, BLRD-50-439/82-38 10 CFR 50.55(e)
FIRST INTERIM REPORT Description of Deficiency Flanged joints for class 2 and 3 alternate analysis piping systems were not qualified in accordance with the ASME Boiler and Pressure Vessel Code, section III, paragraph NC-3647. This piping was analyzed using TVA's Division of Engineering Design Civil Engineering Branch Report CEB-76-11.
Ilowever, this report does not delineate guidelines or methods for flange design verification. Also, TVA design criteria WB-DC-40-31.7 does not address flange qualification. Flanged joints are used in a number of safety-related systems such as the Essential Raw Cooling Water System and the Component Cooling Water System.
Interim Progress TVA is investigating the problem and will develop recommendations to assure class 2 and 3 flanges are qualified in accordance with ASME Section III.
A method of qualification of flanges in alternately analyzed lines will be developed.