ML19312E499

First Interim Deficiency Rept Re Spent Fuel Pool Gates Not Designed to Seismic Category I Requirements.Cause Not Stated.Evaluation Being Conducted.Complete Corrective Action Will Be Forwarded by Unit 1 Initial Criticality

ML19312E499
Person / Time
Site:	Sequoyah
Issue date:	05/29/1980
From:	TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML19312E495	List: ML19312E494 ML19312E499
References
NCR-SQN-NEB8010, NCR-SQN-NEB8012, NUDOCS 8006050031
Download: ML19312E499 (1)

Text

)- ENCLOSURE SEQUOYAH NUCLEAR PLANT UNITS 1 AND 2 SPENT FUEL POOL GATES NCR SQN NEB 8012 10CFR50.55 (e)

FIRST INTERIM REPORT Description of Deficiency The NCR states that the spent fuel pool gates (one to the transfer canal and one to the cask loading area) are not designed to Seismic Category I requirements in accordance with Regulatory Guide 1.13.

Similar NCR's were written on Watts Bar (WBN NEB 8005) and Bellefonte (BLN NEB 8005) Nuclear Plants.

Interim Progress Structural failure of the gates during a seismic event could result in damage ;o stored spent fuel elements. This could result in radiation -

levels in the spent fuel pool area higher than those assumed in the plant safety analysis, and thus could result in doses to plant personnel and the public greater than allowable. This safety-related function results in a Seismic Category I(L) classification of the gates. There is a question within TVA as to whether the gates also have a safety func-tion of maintaining sufficient water level above the spent fuel. This function, if verified, would make the gates Seismic Category I and would require QA program coverage of the gates' fabrication. This matter is being evaluated, and we expect to supply further information and complete the corrective action by initial criticality of unit 1.

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