ML20039D443

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Forwards Control Room Habitability Study, Per 810101 Response to NUREG-0737 Item III.D.3.4.Mods to Control Room Ventilation Sys for Addition of Mass Spectrometers & Revised Air Intake Will Not Be Required
ML20039D443
Person / Time
Site: Beaver Valley
Issue date: 12/28/1981
From: Carey J
DUQUESNE LIGHT CO.
To: Varga S
Office of Nuclear Reactor Regulation
Shared Package
ML20039D444 List:
References
RTR-NUREG-0737, RTR-NUREG-737, TASK-3.D.3.4, TASK-TM BVPS-LC:KDG:139, NUDOCS 8201040095
Download: ML20039D443 (2)


Text

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((,T"SA "' December 28, 1981 tr>

Director of Nuclear Reactor Regulation 93 Uniteo States Nuclear Regulatory Commission C Attn: Mr. Steven A. Varga, Chief , RECEIVED perating Reactors Branch No. 1 7- 7.

Division of Licensing  ;; JAN4. h3R2m>

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Reference:

Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 i)

FUREG 0737 Item III.D.3.4 Centrol Room Habitability .

Centlemen:

In our January 1, 1981 response to the subject document, we had indicated modifications would be required to the Control Room Ventilation System to comply with Regulatory Guide 1.78, 1.95, and General Desion Criterion 19 of Appendix "A",

10 CFR 50. The modifications specified were the eddition of mass spectrometers and a revised air intake to be completed during suly 1983.

Since that time, an intensive engineering review has been performed to identify which toxic gasses would require monitoring and fully define the extent of the changes required within this system. This study has been completed and is submitted herewith as an attachment. The analysis concludes that the only chemical requiring monitoring is chlorine. The aggregate probability of all other toxic gas releases that would result in exposures greater than 10 CFR 100 guidelines was found to be lower than the design basis probability identified in the Standard Review Plan, Section 2.2.3.

We have, therefore, concluded in consideration of existing system design with respect to radiation and chlorine monitoring, emergency breathing air supplies for controi room operators, automatic isolation during a DBA and the attached report that the aforementioned changes will not be required. We feel that reasonable, qualitative positions have been established and do not justify or warrant modifications that extend beyond those installed due to past review efforts by your staff.

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Mr. Steven A. Vargd December 28, 1981 BVPS/LC:KDC:139 Page 2 Contigent upon the acceptance of our position by your staff, we will pursue establishing firm communications links with local industry and enforce-ment officials such that our facility will receive priority notification during any spill or gas release and Control Room Ventilation isolation can be ef fected immediately. It is our firm belief that co-ordination procedures such as this, will enhance the overall safety of all site personnel beyond the capability of any gas monitoring equipment. In addition, we will provide periodic checks to assure as that these communication procedures rema".n in tact over the 11 Se of the facility.

Very truly yours,

,M J. J. Carey

. ce President, Nuclear Attachment cc: Mr. D. A. Beckman, Resident Inspector U. S. Nuclear Regulatory Commission Beaver Valley Power Station Shippingport , PA 15077 U. S. Nuclear Regulatory Commission c/o Document Management Branch Washington, DC 20555 l

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