ML20211L988

Forwards Summary of Analysis Used to Evaluate Habitability of Comanche Peak Steam Electric Station Control Room During Postulated Chlorine Release. NUREG/CR-3786 Used as Basis for plant-specific Analysis

ML20211L988
Person / Time
Site:	Comanche Peak
Issue date:	12/08/1986
From:	Counsil W TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	Noonan V NRC - COMANCHE PEAK PROJECT (TECHNICAL REVIEW TEAM)
Shared Package
ML20211L993	List: ML20211L988 TXX-6116, Summary of Analysis Used to Evaluate Habitability of Comanche Peak Steam Electric Station Control Room During Postulated Chlorine Release
References
RTR-NUREG-CR-3786 TXX-6116, NUDOCS 8612160163
Download: ML20211L988 (1)

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Log # TXX-6116 File # 10010 906.4 TEXAS UTILITIES GENERATING COMPANY BKYWAY TOWER. 4se NORTH OLIVE STREET.1.5. 83. DALLAS, TEXA8 7&a91 December 8, 1986 0%^"i ?? O 3, Director of Nuclear Reactor Regulation Attn: Mr. Vince S. Noonan, Director Comanche Peak Project Division of Licensing U. S. Nuclear Regulatory Commission Washington, D. C.

20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET NOS. 50-445 and 50-446 CONTROL ROOM PRESSURIZATION

Dear Mr. Noonan:

By letter dated September 30, 1985, the NRC staff expressed a concern with regard to an FSAR revision (Amendment 55) which provided information relative to protection of control room operators from a postulated chlorine release accident.

Specifically, the Staff maintained that 800 cfm control room pressurization flow rate at 1/8 inch water gauge differential pressure was inconsistent with guidance provided by Regulatory Guide (R.G.) 1.95.

In subsequent discussions, the Staff referenced NUREG CR-3786 as an acceptable interpretation of the assumptions and methodology used in R.G.1.95.

Using the NUREG as a basis, a plant specific analysis was performed. A summary of the calculations used for this analysis is provided in attachment 1.

The analysis demonstrates that with a control room pressurization flow rate of 800 cfm at 1/8 inch water gauge differential pressure, the control room maximum allowable chlorine concentration will not be exceeded in the event of a postulated chlorine accident. is an advance copy of revisions to the FSAR that reference the plant specific analysis.

Very truly yours, J 7" W. G. Counsil BSD/amb Attachments j

c - NRC (0 + 40 copies)

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TXX-6116 December 8, 1986

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