ML19341A422

Forwards Proposed Tech Specs,Changing Explosive Gas Mixtures in Tanks W/Radioactive Effluents & Deleting Hydrogen Monitor Requirement for Waste Gas Holdup Sys

ML19341A422
Person / Time
Site:	McGuire, Mcguire
Issue date:	01/12/1981
From:	Parker W DUKE POWER CO.
To:	Harold Denton, Youngblood B Office of Nuclear Reactor Regulation
Shared Package
ML19341A423	List: ML19341A422 ML19341A424
References
TAC-46812, NUDOCS 8101230493
Download: ML19341A422 (1)

Text

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DUKE POWER COMPANY Powra Buxtonwo 4c2 SocTa Cucacu Srazzr. CuAntorTE. N. C. asa4a wiwee o. Annen.sa.

January 12, 1981 WCt Patssor=7 tt' tPaomt:Anta 7c4 o

Svea.s Paoovetio 373-4c s 3 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commiseion Washington, D. C.

20555 Attention:

Mr. B. J. Youngblood, Chief Licensing Projects Branch No. 1 Re: McGuire Nuclear Station Docket No. 50-369, ~370

Dear Mr. Denton:

As discussed with Mr. J. Boegli and Mr. M. Virgilio of your Staff on January 9, 1981, please find attached a request for a change to the McGuire Technical Specifications concerning explosive gas mixtures in tanks containing radio-active effluents. As discussed in the attached justification, the design of the waste gas holdup system at McGuire Nuclear Station is based on limiting the concen:: ration of oxygen in the system to less than or equal to three percent oxygen by volume. Extensive modifications would have to be made to the system in order to meet the NRC Staff proposed limit of two percent oxygen by volume.

It is therefore requested that the r2quirement on the con-centration of oxygen in the waste gas holdup system be limited to less than or equal to three percent by volume.

In addition, as discussed in the justification, since no mixture of hydrogen and oxygen.i.s flammable, with nitrogen acting as the diluent, below five percent oxygen in a mixture, there appears to be no need for requirements for a hydrogen monitor in this system in addition to the oxygen monitor l

required by the technical specification. We therefore request that the require-l ment for a hydrogen monitor in the waste gas holdup system be deleted.

Please advise if you have any questions.

3 V y truly your O/

Uw 46

' William O. Parker, J.

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