ML20084E220

AO 50-244/74-08:on 740511,liquid Leak in Outlet Piping from a Mixed Bed Demineralizer in Auxiliary Bldg Released Gases to Bldg Atmosphere.Leak Isolated

ML20084E220
Person / Time
Site:	Ginna
Issue date:	05/14/1974
From:	Platt C ROCHESTER GAS & ELECTRIC CORP.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20084E218	List: ML20084E214 ML20084E220
References
AO-50-244-74-08, AO-50-244-74-8, NUDOCS 8304140446
Download: ML20084E220 (1)

Text

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ROCHESTER GAS AND ELECTRIC CORPORATIOH e 89 EAST AVENUE, ROCHESTER, N.Y.14649

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anta coot vis 546 2700 i

Ginna Station 1

May 14, 1974

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Mr. James P. O'Reilly, Director f ' E N1374 c !

Directorate of Regulatory Operations i _au j. p Region 1 \ f.

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I U. S. Atomic Energy Commission  %) % !.$

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King of Prussia, Pennsylvania 19406

Subject:

Abnormal Occurrence 74-8: An unplanned relcase of radioactive material from the site boundary

Dear Mr. O'Reilly:

- This is to confirm my conversation with Mr. Walter Baunack on May 13, 1974 to report Abnormal Occurrence 74-8 at Cinna Station.

On May 11, 1974, a liquid leak in the outict piping from the "A". Mixed Bed Demineralizer (CVCS System) in the Auxiliary Building relcased gases to' the Auxiliary Building atmosphere. These radioactive gases eventually went out the plant vent. .

During the 12-hour period between midnight and noon on May 11, 1974, the plant vent released radioactive gases at the rate of .667. of the Technical Specification limit. Between noon and midnight on May 11, 1974, the release rate was .337. of the Technical Specification limit. The highest release rate was 1.637. of the Technical Specification limit and this occurred between 1300 and 1400 on May 11, 1974 just prior to the isolation of the leak. With-in two hours after the leak was isolated, the plant vent release rate had returned to its previous level of ~0.17. of the, Technical Specification limit. -

Very truly yours,

.~D W Charles E. Platt W

Superintendent

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Mr. J. F. O' Leary, AEC & /

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Mr. G. J. Suarthout, RC&E l

Mr. L. D. White, Jr., RC&E-

~442.3' 8304140446 740521 - j-PDR ADOCK 05000244 S. .PDR - COP.Y SENT REGION /

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