ML19341A178
| ML19341A178 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 01/15/1981 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8101220291 | |
| Download: ML19341A178 (1) | |
Text
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TENNESSEE VALLEY AUTHORITY e
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y January 15, 1981
'5 Director' of Nuclear Reactor Regulation Attention: Mr. A. Schwencer, Chief Licensing Branch No. 2 Division of Licensing U.S. Nuclear Regulatory Commission Washington, DC 20555
Dear Mr. Schwencer:
In the Matter of the Application of
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Docket Nos. 50-327 Tennessee Valley Authority
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50-328 In connection with the Advisory Committee on Reactor Safeguards (ACRS) review of the Sequoyah Nuclear Plant, TVA indicated that all containment boundary components would be investigated and modifications implemented, if deemed necessary, to confirm that the 1/2-inch cylindrical shell plate between elevations 782 and 791.5 is the critical part of the containment boundary for yield pressure capacity. TVA has determined that for the current design the pgrsonnel air lock has a calculated yielg pressure capacity of 42 lb/in gauge which is less than the 45 lb/in gauge stated as the structural capability of the Sequoyah containment in the ACRS letter dated September 8,1980, from H. Plesset to J. Ahearne.
The personnel air lock is to be modified witg additional stiffeners such that its yield capacity will exceed 45 lb/in gauge. This modification is currently scheduled to be completed by January 30, 1981.
Very truly yours, TENNESSEE VALLEY AUTHORITY
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L. M. Mills, ager Nuclear Regulation and Safety Sworn to and subsc bed before me this M E day of 1981 Y hf NotgyPublic g (),,
f My Commission Expires 7/F/83 i /
cc:
Mr. Raymond F. Fraley Executive Director Advisory Committee o'.2 Reactor Safeguards U.S. Nuclear Regulatory Constission Washington, DC 20555 An Equal Opportunity Employer 8101220 Q l