ML20236J313

Revised Proposed Tech Specs Pages Re Safety Injection Signal & Blackout Signal

ML20236J313
Person / Time
Site:	Comanche Peak
Issue date:	07/01/1998
From:	TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:
Shared Package
ML20236J311	List: ML20236J308 ML20236J313
References
NUDOCS 9807080131
Download: ML20236J313 (2)

Text

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Attachment to TXX 98159 Page 1 of I could result in a loss of cooling to the affected rooms and loss of the function of the equipment in the UPS & Distribution Room of the opposite Train. As a result. the temperatures in the affected room would increase until it exceeded the maximum demonstrated operating temperature for the equipment in the room. 30 days is an acceptable completion time to restore "same Train" cooling due to the flexibility in the design with room coolers for each room and redundant UPS A/C Trains which are each capable of cooling all the UPS & Distribution Rooms.

If one or more UPS & Distribution Rooms looses all cooling, the affected rooms will begin to heat up. If either or both UPS A/C Trains is circulating air through the supported areas, the mixing will result in a much slower rate of temperature increases. The completion time of 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> allows restoration before the temperature rises to a level that the equipment in the affected rooms are impacted. To confirm the equipment's OPERABILITY. the temperature in the affected rooms is verified to be less than or equal to 104'F within one hour and every 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereafter.

If one or more UPS & Distribution Rooms looses forced cooling and neither UPS A/C Train is circulating air in those rooms or if both rooms loose forced cooling, the temperature rise is expected to affect equipment operability in a short period of time. One hour is allowed to restore circulating air or forced cooling.

Each actuation signal should be tested during the test frequency.

The applicable signals for the UPS A/C Trains are the Safety Injection Signal (SIS) and Statior, Blackout Signal (B0S).

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COMANCHE PEAK UNITS 1 AND 2 B 3/4 7 8a Unit 1 Amendment No. 14